use axum::{
    body::Body,
    extract::{Path, Query, State},
    http::{header, StatusCode},
    response::{IntoResponse, Response},
    routing::get,
    Router,
};
use once_cell::sync::Lazy;
use serde_json::json;
use std::collections::HashMap;
use uuid::Uuid;

use crate::core::db::qdrant_db::QdrantDb;
use crate::core::db::{schema, PostgresDb};

/// Shared video query params: mode=normal|debug, audio=on|off
fn parse_video_params(params: &std::collections::HashMap<String, String>) -> (String, String) {
    let mode = params
        .get("mode")
        .map(|s| s.as_str())
        .unwrap_or("normal")
        .to_string();
    let audio = params
        .get("audio")
        .map(|s| s.as_str())
        .unwrap_or("on")
        .to_string();
    (mode, audio)
}

static FFMPEG: Lazy<String> = Lazy::new(|| {
    std::env::var("MOMENTRY_FFMPEG").unwrap_or_else(|_| {
        let full = "/opt/homebrew/opt/ffmpeg-full/bin/ffmpeg";
        if std::path::Path::new(full).exists() {
            full.to_string()
        } else {
            "ffmpeg".to_string()
        }
    })
});

fn ffmpeg_cmd() -> std::process::Command {
    let mut cmd = std::process::Command::new(&*FFMPEG);
    let full_lib = "/opt/homebrew/opt/ffmpeg-full/lib";
    if std::path::Path::new(full_lib).exists() {
        cmd.env("DYLD_LIBRARY_PATH", full_lib);
    }
    cmd
}

pub fn bbox_routes() -> Router<crate::api::types::AppState> {
    Router::new()
        .route(
            "/api/v1/file/:file_uuid/video/bbox",
            get(bbox_overlay_video),
        )
        .route(
            "/api/v1/file/:file_uuid/trace/:trace_id/video",
            get(trace_video),
        )
        .route(
            "/api/v1/file/:file_uuid/stranger/:stranger_id/video",
            get(stranger_video),
        )
        .route("/api/v1/file/:file_uuid/video", get(stream_video))
        .route("/api/v1/file/:file_uuid/thumbnail", get(face_thumbnail))
        .route(
            "/api/v1/file/:file_uuid/chunk/:chunk_id/thumbnail",
            get(chunk_thumbnail),
        )
        .route("/api/v1/file/:file_uuid/clip", get(video_clip))
}

/// 5×7 bitmap font — each character 5 wide × 7 tall
/// Encoding: col 0=0x10, col 1=0x08, col 2=0x04, col 3=0x02, col 4=0x01
fn bitmap_char(c: char) -> [u8; 7] {
    match c.to_ascii_lowercase() {
        '0' => [0x0E, 0x11, 0x13, 0x15, 0x19, 0x11, 0x0E],
        '1' => [0x04, 0x0C, 0x04, 0x04, 0x04, 0x04, 0x0E],
        '2' => [0x0E, 0x11, 0x01, 0x02, 0x04, 0x08, 0x1F],
        '3' => [0x0E, 0x11, 0x01, 0x06, 0x01, 0x11, 0x0E],
        '4' => [0x02, 0x06, 0x0A, 0x12, 0x1F, 0x02, 0x02],
        '5' => [0x1F, 0x10, 0x1E, 0x01, 0x01, 0x11, 0x0E],
        '6' => [0x0E, 0x10, 0x1E, 0x11, 0x11, 0x11, 0x0E],
        '7' => [0x1F, 0x01, 0x02, 0x04, 0x08, 0x10, 0x10],
        '8' => [0x0E, 0x11, 0x11, 0x0E, 0x11, 0x11, 0x0E],
        '9' => [0x0E, 0x11, 0x11, 0x0F, 0x01, 0x11, 0x0E],
        'a' => [0x0E, 0x11, 0x11, 0x1F, 0x11, 0x11, 0x11],
        'b' => [0x1E, 0x11, 0x11, 0x1E, 0x11, 0x11, 0x1E],
        'c' => [0x0E, 0x11, 0x10, 0x10, 0x10, 0x11, 0x0E],
        'd' => [0x1C, 0x12, 0x11, 0x11, 0x11, 0x12, 0x1C],
        'e' => [0x1F, 0x10, 0x10, 0x1E, 0x10, 0x10, 0x1F],
        'f' => [0x1F, 0x10, 0x10, 0x1E, 0x10, 0x10, 0x10],
        't' => [0x04, 0x04, 0x1F, 0x04, 0x04, 0x04, 0x06],
        '_' => [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1F],
        ' ' => [0x00; 7],
        _ => [0x00; 7],
    }
}

/// Width of one character in pixels (5 cols × 3px/dot = 15px)
const CHAR_W: i32 = 5 * 3;
/// Spacing between characters (px)
const CHAR_GAP: i32 = 4;
/// Total advance per character
const CHAR_ADVANCE: i32 = CHAR_W + CHAR_GAP;

fn render_text(
    parts: &mut Vec<String>,
    text: &str,
    origin_x: i32,
    origin_y: i32,
    enable: Option<i32>,
) -> i32 {
    let mut px = origin_x;
    for ch in text.chars() {
        let bm = bitmap_char(ch);
        for (row, bits) in bm.iter().enumerate() {
            for col in 0..5 {
                if bits & (1 << (4 - col)) != 0 {
                    let x = px + col as i32 * 3;
                    let y = origin_y + row as i32 * 3;
                    if let Some(offset) = enable {
                        parts.push(format!(
                            "drawbox=x={}:y={}:w=3:h=3:color=white@1.0:t=fill:enable='eq(n,{})'",
                            x, y, offset
                        ));
                    } else {
                        parts.push(format!(
                            "drawbox=x={}:y={}:w=3:h=3:color=white@1.0:t=fill",
                            x, y
                        ));
                    }
                }
            }
        }
        px += CHAR_ADVANCE;
    }
    px
}

#[derive(Debug, serde::Deserialize)]
struct BboxParams {
    // Legacy (deprecated): single param, frames
    start: Option<i32>,
    end: Option<i32>,
    // Explicit params: input either or both
    start_frame: Option<i32>,
    end_frame: Option<i32>,
    start_time: Option<f64>,
    end_time: Option<f64>,
    face_uuid: Option<String>,
    duration: Option<f64>,
    mode: Option<String>,
    audio: Option<String>,
}

/// Resolve (start_frame, end_frame) from dual input.
/// Priority: start_frame/end_frame > start/end > start_time/end_time.
/// If only time is given, convert via fps.
fn resolve_frame_range(
    start_frame: Option<i32>,
    end_frame: Option<i32>,
    start: Option<i32>,
    end: Option<i32>,
    start_time: Option<f64>,
    end_time: Option<f64>,
    fps: f64,
) -> (i32, i32) {
    if let (Some(sf), Some(ef)) = (start_frame.or(start), end_frame.or(end)) {
        return (sf, ef);
    }
    if let (Some(st), Some(et)) = (start_time, end_time) {
        return ((st * fps) as i32, (et * fps) as i32);
    }
    (0, i32::MAX)
}

async fn bbox_overlay_video(
    State(state): State<crate::api::types::AppState>,
    Path(file_uuid): Path<String>,
    Query(p): Query<BboxParams>,
) -> Result<impl IntoResponse, StatusCode> {
    let videos_table = schema::table_name("videos");
    let row: Option<(String,)> = sqlx::query_as(&format!(
        "SELECT file_path FROM {} WHERE file_uuid = $1",
        videos_table
    ))
    .bind(&file_uuid)
    .fetch_optional(state.db.pool())
    .await
    .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
    let (video_path,) = row.ok_or(StatusCode::NOT_FOUND)?;

    let face_fuid = p.face_uuid.as_deref().unwrap_or(&file_uuid);
    let duration = p.duration.unwrap_or(10.0);

    // Get FPS
    let fps: f64 = sqlx::query_scalar(&format!(
        "SELECT COALESCE(fps, 24.0) FROM {} WHERE file_uuid = $1",
        videos_table
    ))
    .bind(&file_uuid)
    .fetch_optional(state.db.pool())
    .await
    .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?
    .unwrap_or(24.0);

    let (start_f, end_f) = resolve_frame_range(
        p.start_frame,
        p.end_frame,
        p.start,
        p.end,
        p.start_time,
        p.end_time,
        fps,
    );

    let start_sec = start_f as f64 / fps;

    // Get face bboxes from Qdrant _faces
    use crate::core::db::qdrant_db::QdrantDb;
    use serde_json::json;

    let qdrant = QdrantDb::new();
    let face_filter = json!({
        "must": [
            {"key": "file_uuid", "match": {"value": face_fuid}},
            {"key": "frame", "range": {"gte": start_f, "lte": end_f}},
            {"key": "trace_id", "match": {"value": 1}}
        ]
    });
    let points = qdrant.scroll_all_points("_faces", face_filter, 500).await.unwrap_or_default();

    let rows: Vec<(i64, i32, i32, i32, i32, Option<i32>, Option<String>)> = points.iter().filter_map(|p| {
        let payload = &p["payload"];
        let frame = payload["frame"].as_i64()?;
        let bbox = &payload["bbox"];
        let x = bbox["x"].as_f64()? as i32;
        let y = bbox["y"].as_f64()? as i32;
        let w = bbox["width"].as_f64()? as i32;
        let h = bbox["height"].as_f64()? as i32;
        let trace_id = payload["trace_id"].as_i64().map(|t| t as i32);
        let face_id = payload.get("face_id").and_then(|v| v.as_str()).map(|s| s.to_string());
        Some((frame, x, y, w, h, trace_id, face_id))
    }).collect();

    // Build filters — each bbox enabled only on its frame
    let mut parts: Vec<String> = Vec::new();
    for (frame, x, y, w, h, trace_id, _) in &rows {
        let text = format!("t{}", trace_id.unwrap_or(0));
        let offset = (*frame as i32) - start_f;
        parts.push(format!(
            "drawbox=x={}:y={}:w={}:h={}:color=red@0.8:thickness=4:enable='eq(n,{})'",
            x, y, w, h, offset
        ));
        let tx = *x + 6;
        let ty = *y + 6;
        render_text(&mut parts, &text, tx, ty, Some(offset));
    }

    let bbox_mode = p.mode.as_deref().unwrap_or("normal");
    let bbox_audio = p.audio.as_deref().unwrap_or("on");

    let vf = if parts.is_empty() || bbox_mode == "normal" {
        "null".to_string()
    } else {
        parts.join(",")
    };

    let tmp = std::env::temp_dir().join(format!("bbox_{}.mp4", Uuid::new_v4()));
    let tmp_str = tmp.to_str().unwrap_or("").to_string();
    let ss = start_sec.to_string();
    let dur = duration.to_string();
    let mut bbox_args = vec!["-ss", &ss, "-i", &video_path, "-t", &dur];
    if vf != "null" {
        bbox_args.extend_from_slice(&[
            "-vf",
            &vf,
            "-c:v",
            "libx264",
            "-preset",
            "ultrafast",
            "-crf",
            "28",
        ]);
    } else {
        bbox_args.extend_from_slice(&["-c", "copy"]);
    }
    if bbox_audio == "off" {
        bbox_args.push("-an");
    }
    bbox_args.extend_from_slice(&["-movflags", "+faststart", "-y", &tmp_str]);
    let status = ffmpeg_cmd()
        .args(&bbox_args)
        .status()
        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
    if !status.success() {
        let _ = std::fs::remove_file(&tmp);
        return Err(StatusCode::INTERNAL_SERVER_ERROR);
    }

    let data = tokio::fs::read(&tmp)
        .await
        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
    let _ = std::fs::remove_file(&tmp);
    Ok(Response::builder()
        .header(header::CONTENT_TYPE, "video/mp4")
        .header(header::CONTENT_LENGTH, data.len())
        .body(Body::from(data))
        .unwrap())
}

fn parse_range(range: &str, file_size: u64) -> (u64, u64) {
    let r = range.trim_start_matches("bytes=");
    let parts: Vec<&str> = r.split('-').collect();
    let start = parts[0].parse::<u64>().unwrap_or(0);
    let end = if parts.len() > 1 && !parts[1].is_empty() {
        parts[1].parse::<u64>().unwrap_or(file_size - 1)
    } else {
        file_size - 1
    };
    (start.min(file_size - 1), end.min(file_size - 1))
}

async fn trace_video(
    State(state): State<crate::api::types::AppState>,
    Path((file_uuid, trace_id)): Path<(String, i32)>,
    Query(params): Query<std::collections::HashMap<String, String>>,
) -> Result<impl IntoResponse, StatusCode> {
    trace_video_inner(&state, &file_uuid, trace_id, &params).await
}

async fn trace_video_inner(
    state: &crate::api::types::AppState,
    file_uuid: &str,
    trace_id: i32,
    params: &std::collections::HashMap<String, String>,
) -> Result<impl IntoResponse, StatusCode> {
    use axum::http::header;

    let (mode, audio) = parse_video_params(&params);

    let videos_table = schema::table_name("videos");
    let row: Option<(String, f64, i32, i32)> = sqlx::query_as(&format!(
        "SELECT file_path, COALESCE(fps, 24.0), COALESCE(width, 0), COALESCE(height, 0) FROM {} WHERE file_uuid = $1",
        videos_table
    ))
    .bind(&file_uuid)
    .fetch_optional(state.db.pool())
    .await
    .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
    let (video_path, fps, _width, _height) = row.ok_or(StatusCode::NOT_FOUND)?;

    // Query face detections from Qdrant to find frame range for target trace
    let qdrant = QdrantDb::new();
    let trace_filter = json!({
        "must": [
            {"key": "file_uuid", "match": {"value": file_uuid}},
            {"key": "trace_id", "match": {"value": trace_id}}
        ]
    });
    let points = qdrant.scroll_all_points("_faces", trace_filter, 500).await.unwrap_or_default();

    let rows: Vec<(i64, i32, i32, i32, i32)> = points.iter().filter_map(|p| {
        let payload = &p["payload"];
        let frame = payload["frame"].as_i64()?;
        let bbox = &payload["bbox"];
        let x = bbox["x"].as_f64()? as i32;
        let y = bbox["y"].as_f64()? as i32;
        let w = bbox["width"].as_f64()? as i32;
        let h = bbox["height"].as_f64()? as i32;
        Some((frame, x, y, w, h))
    }).collect();

    if rows.is_empty() {
        return Err(StatusCode::NOT_FOUND);
    }

    let first_frame = rows[0].0;
    let last_frame = rows[rows.len() - 1].0;
    let start_sec = first_frame as f64 / fps;
    let padding = params
        .get("padding")
        .and_then(|s| s.parse().ok())
        .unwrap_or(2.0);
    let duration = (last_frame - first_frame) as f64 / fps + padding * 2.0;
    let seek = (start_sec - padding).max(0.0);

    // === NORMAL MODE: raw video without overlays ===
    if mode == "normal" {
        let tmp = std::env::temp_dir().join(format!("trace_{}.mp4", Uuid::new_v4()));
        let tmp_str = tmp.to_str().unwrap_or("").to_string();
        let sk = seek.to_string();
        let du = duration.to_string();
        let mut cmd_args = vec!["-ss", &sk, "-i", &video_path, "-t", &du, "-c", "copy"];
        if audio == "off" {
            cmd_args.push("-an");
        }
        cmd_args.extend_from_slice(&["-y", &tmp_str]);
        let result = ffmpeg_cmd()
            .args(&cmd_args)
            .output()
            .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
        if !result.status.success() {
            return Err(StatusCode::INTERNAL_SERVER_ERROR);
        }
        let data = tokio::fs::read(&tmp)
            .await
            .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
        let _ = std::fs::remove_file(&tmp);
        return Ok(Response::builder()
            .header(header::CONTENT_TYPE, "video/mp4")
            .header(header::CONTENT_LENGTH, data.len())
            .body(Body::from(data))
            .unwrap());
    }

    // === DEBUG MODE: text overlay, list all traces in frame range ===
    let start_fn = (start_sec * fps) as i32;
    let end_fn = ((start_sec + duration) * fps) as i64;

    // Query all traces with identity names and bbox positions in the visible frame range
    let identities_table = schema::table_name("identities");
    let all_points = qdrant.scroll_all_points("_faces", json!({
        "must": [
            {"key": "file_uuid", "match": {"value": file_uuid}},
            {"key": "frame", "range": {"gte": start_fn, "lte": end_fn}},
            {"key": "trace_id", "match": {"value": 1}}
        ]
    }), 1000).await.unwrap_or_default();

    // Get identity names for traces that have identity_id
    let mut identity_names: HashMap<i32, String> = HashMap::new();
    for point in &all_points {
        let payload = &point["payload"];
        if let Some(iid) = payload["identity_id"].as_i64() {
            let trace_id = payload["trace_id"].as_i64().unwrap_or(0) as i32;
            if iid > 0 && !identity_names.contains_key(&trace_id) {
                if let Some(name) = sqlx::query_scalar::<_, String>(&format!(
                    "SELECT name FROM {} WHERE id = $1",
                    identities_table
                ))
                .bind(iid as i32)
                .fetch_optional(state.db.pool())
                .await
                .ok()
                .flatten()
                {
                    identity_names.insert(trace_id, name);
                }
            }
        }
    }

    let all_rows: Vec<(i32, i64, i32, i32, i32, i32, Option<String>)> = all_points.iter().filter_map(|p| {
        let payload = &p["payload"];
        let trace_id = payload["trace_id"].as_i64()? as i32;
        let frame = payload["frame"].as_i64()?;
        let bbox = &payload["bbox"];
        let x = bbox["x"].as_f64()? as i32;
        let y = bbox["y"].as_f64()? as i32;
        let w = bbox["width"].as_f64()? as i32;
        let h = bbox["height"].as_f64()? as i32;
        let name = identity_names.get(&trace_id).cloned();
        Some((trace_id, frame, x, y, w, h, name))
    }).collect();

    // Group frames by trace_id, compute start_frame per trace; collect bbox per frame
    // frame_number is i64 (BIGINT), so HashMaps need i64 for frame values
    let mut trace_frames: HashMap<i32, Vec<i64>> = HashMap::new();
    let mut trace_identity: HashMap<i32, String> = HashMap::new();
    let mut bbox_per_frame: HashMap<(i32, i64), (i32, i32, i32, i32)> = HashMap::new(); // (tid, fn) -> (x, y, w, h)
    for (tid, fn_, x, y, w, h, name_opt) in &all_rows {
        trace_frames.entry(*tid).or_default().push(*fn_);
        bbox_per_frame.insert((*tid, *fn_), (*x, *y, *w, *h));
        if let Some(name) = name_opt {
            trace_identity.entry(*tid).or_insert_with(|| name.clone());
        } else {
            trace_identity
                .entry(*tid)
                .or_insert_with(|| format!("Stranger_{:03}", tid));
        }
    }

    // Query cut/scene info from chunk table (not a separate "cut" table)
    let chunk_table = schema::table_name("chunk");
    let cut_label: String = sqlx::query_scalar::<_, String>(
        &format!("SELECT chunk_id FROM {} WHERE file_uuid = $1 AND chunk_type = 'cut' AND start_frame <= $2 AND end_frame >= $2 LIMIT 1", chunk_table)
    )
    .bind(&file_uuid).bind(first_frame)
    .fetch_optional(state.db.pool()).await
    .unwrap_or(None)
    .unwrap_or_else(|| "-".to_string());

    // Sort traces for consistent ordering
    let mut sorted_traces: Vec<(i32, &Vec<i64>)> =
        trace_frames.iter().map(|(k, v)| (*k, v)).collect();
    sorted_traces.sort_by_key(|(tid, _)| *tid);

    let frame_offset = first_frame as i64 - (padding * fps) as i64;
    let fps_str = &fps.to_string();

    // Build drawtext entries
    let mut parts: Vec<String> = Vec::new();

    // Top-left info panel
    // Frame/time at the top
    parts.push(format!(
        "drawtext=text='Frame %{{n}}  %{{pts}}':fontsize=28:fontcolor=white:box=1:boxcolor=black@0.6:x=10:y=12"
    ));
    parts.push(format!(
        "drawtext=text='Cut\\: {}':fontsize=28:fontcolor=white:box=1:boxcolor=black@0.6:x=10:y=56",
        cut_label
    ));
    parts.push(format!(
        "drawtext=text='{}':fontsize=28:fontcolor=white:box=1:boxcolor=black@0.6:x=10:y=100",
        file_uuid
    ));

    // Per-trace entries: show trace_id, start_frame, identity name
    // Position starts at y=144, increments by 44 per trace
    let mut y_pos = 144;
    for (tid, frames) in &sorted_traces {
        let start = frames.iter().min().unwrap_or(&first_frame);
        let identity = trace_identity
            .get(tid)
            .map(|s| s.as_str())
            .unwrap_or("unknown");
        let label = format!("Trace {}\\: start={}  {}", tid, start, identity);

        // Continuous range (interpolated): visible from first to last frame
        let enable = format!(
            "between(n,{},{})",
            frames[0] as i64 - frame_offset,
            frames[frames.len() - 1] as i64 - frame_offset
        );

        parts.push(format!(
            "drawtext=text='{}':fontsize=24:fontcolor=white:box=1:boxcolor=black@0.6:x=10:y={}:enable='{}'",
            label, y_pos, enable
        ));
        y_pos += 44;
    }

    // Bounding boxes: interpolated (thickness=1) + actual (thickness=4) with trace_id label
    for (tid, frames) in &sorted_traces {
        let range_enable = format!(
            "between(n,{},{})",
            frames[0] as i64 - frame_offset,
            frames[frames.len() - 1] as i64 - frame_offset
        );
        // Interpolated bbox at first known position across the whole trace range
        if let Some((x, y, w, h)) = bbox_per_frame.get(&(*tid, frames[0])) {
            parts.push(format!(
                "drawbox=x={}:y={}:w={}:h={}:color=green@0.3:thickness=1:enable='{}'",
                x, y, w, h, range_enable
            ));
        }
        // Actual detection bboxes with trace_id label
        for fn_ in frames.iter() {
            if let Some((x, y, w, h)) = bbox_per_frame.get(&(*tid, *fn_)) {
                let n = *fn_ as i64 - frame_offset;
                parts.push(format!(
                    "drawbox=x={}:y={}:w={}:h={}:color=green@0.5:thickness=4:enable='between(n,{},{})'",
                    x, y, w, h, n, n
                ));
                parts.push(format!(
                    "drawtext=text='{}':x={}:y={}:fontsize=28:fontcolor=green:box=1:boxcolor=black@0.5:enable='between(n,{},{})'",
                    tid, x + 4, y + 4, n, n
                ));
            }
        }
    }

    let filter_text = parts.join(",");
    let filter_file = std::env::temp_dir().join(format!("vf_{}.txt", Uuid::new_v4()));
    let _ = std::fs::write(&filter_file, &filter_text);
    let filter_path = filter_file.to_str().unwrap_or("");

    let tmp = std::env::temp_dir().join(format!("trace_{}.mp4", Uuid::new_v4()));
    let tmp_str = tmp.to_str().unwrap_or("").to_string();
    let sk = seek.to_string();
    let du = duration.to_string();
    let mut debug_args = vec![
        "-ss",
        &sk,
        "-i",
        &video_path,
        "-t",
        &du,
        "-/filter_complex",
        &filter_path,
        "-c:v",
        "libx264",
        "-preset",
        "ultrafast",
        "-crf",
        "28",
    ];
    if audio == "on" {
        debug_args.extend_from_slice(&["-c:a", "aac"]);
    }
    debug_args.extend_from_slice(&["-movflags", "+faststart", "-y", &tmp_str]);
    let result = ffmpeg_cmd()
        .args(&debug_args)
        .output()
        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
    if !result.status.success() {
        let stderr = String::from_utf8_lossy(&result.stderr);
        let _ = std::fs::write("/tmp/ffmpeg_last_error.txt", stderr.as_bytes());
        tracing::error!(
            "ffmpeg failed ({} bytes), see /tmp/ffmpeg_last_error.txt",
            stderr.len()
        );
        let _ = std::fs::remove_file(&filter_file);
        let _ = std::fs::remove_file(&tmp);
        return Err(StatusCode::INTERNAL_SERVER_ERROR);
    }

    let data = tokio::fs::read(&tmp)
        .await
        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
    let _ = std::fs::remove_file(&filter_file);
    let _ = std::fs::remove_file(&tmp);
    Ok(Response::builder()
        .header(header::CONTENT_TYPE, "video/mp4")
        .header(header::CONTENT_LENGTH, data.len())
        .body(Body::from(data))
        .unwrap())
}

async fn stream_video(
    State(state): State<crate::api::types::AppState>,
    Path(file_uuid): Path<String>,
    Query(params): Query<std::collections::HashMap<String, String>>,
    request: axum::http::Request<Body>,
) -> Result<impl IntoResponse, StatusCode> {
    use tokio::io::{AsyncReadExt, AsyncSeekExt};

    let (_mode, audio) = parse_video_params(&params);

    let videos_table = schema::table_name("videos");
    let row: Option<(String,)> = sqlx::query_as(&format!(
        "SELECT file_path FROM {} WHERE file_uuid = $1",
        videos_table
    ))
    .bind(&file_uuid)
    .fetch_optional(state.db.pool())
    .await
    .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
    let (file_path,) = row.ok_or(StatusCode::NOT_FOUND)?;

    let src = std::path::PathBuf::from(&file_path);
    if !src.exists() {
        return Err(StatusCode::NOT_FOUND);
    }

    // Chunk extraction with dual time/frame params
    let start_time_param = params.get("start_time").and_then(|v| v.parse::<f64>().ok());
    let end_time_param = params.get("end_time").and_then(|v| v.parse::<f64>().ok());
    let start_frame_param = params
        .get("start_frame")
        .and_then(|v| v.parse::<f64>().ok());
    let end_frame_param = params.get("end_frame").and_then(|v| v.parse::<f64>().ok());
    let start_legacy = params.get("start").and_then(|v| v.parse::<f64>().ok());
    let end_legacy = params.get("end").and_then(|v| v.parse::<f64>().ok());

    let has_range =
        start_frame_param.is_some() || start_time_param.is_some() || start_legacy.is_some();

    if has_range {
        let (start_sec, dur) = if let (Some(sf), Some(ef)) = (start_frame_param, end_frame_param) {
            let _fps: f64 = sqlx::query_scalar(&format!(
                "SELECT COALESCE(fps, 24.0) FROM {} WHERE file_uuid = $1",
                videos_table
            ))
            .bind(&file_uuid)
            .fetch_optional(state.db.pool())
            .await
            .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?
            .unwrap_or(24.0);
            (sf / _fps, (ef - sf) / _fps)
        } else if let (Some(st), Some(et)) = (start_time_param, end_time_param) {
            (st, et - st)
        } else if let (Some(s), Some(e)) = (start_legacy, end_legacy) {
            (s, e - s)
        } else {
            return Err(StatusCode::BAD_REQUEST);
        };
        if dur <= 0.0 {
            return Err(StatusCode::BAD_REQUEST);
        }

        let tmp = std::env::temp_dir().join(format!("chunk_{}.mp4", Uuid::new_v4()));
        let tmp_str = tmp.to_str().unwrap_or("").to_string();
        let ss = start_sec.to_string();
        let d = dur.to_string();
        let mut chunk_args = vec!["-ss", &ss, "-i", &file_path, "-t", &d, "-c", "copy"];
        if audio == "off" {
            chunk_args.push("-an");
        }
        chunk_args.extend_from_slice(&["-movflags", "+faststart", "-y", &tmp_str]);
        let status = ffmpeg_cmd()
            .args(&chunk_args)
            .status()
            .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
        if !status.success() {
            let _ = std::fs::remove_file(&tmp);
            return Err(StatusCode::INTERNAL_SERVER_ERROR);
        }
        let data = tokio::fs::read(&tmp)
            .await
            .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
        let _ = std::fs::remove_file(&tmp);
        return Ok(Response::builder()
            .header(header::CONTENT_TYPE, "video/mp4")
            .header(header::CONTENT_LENGTH, data.len())
            .body(Body::from(data))
            .unwrap());
    }

    // Full file streaming with range request support
    let file_size = src.metadata().map(|m| m.len()).unwrap_or(0);
    let content_type = "video/mp4";

    let range_hdr = request
        .headers()
        .get(header::RANGE)
        .and_then(|v| v.to_str().ok());
    if let Some(range_str) = range_hdr {
        let (start, end) = parse_range(range_str, file_size);
        let length = end - start + 1;
        let mut file = tokio::fs::File::open(&src)
            .await
            .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
        file.seek(std::io::SeekFrom::Start(start))
            .await
            .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
        let take = file.take(length);
        let stream = tokio_util::io::ReaderStream::new(take);
        let body = Body::from_stream(stream);
        Ok(Response::builder()
            .status(StatusCode::PARTIAL_CONTENT)
            .header(header::CONTENT_TYPE, content_type)
            .header(
                header::CONTENT_RANGE,
                format!("bytes {}-{}/{}", start, end, file_size),
            )
            .header(header::CONTENT_LENGTH, length)
            .body(body)
            .unwrap())
    } else {
        let file = tokio::fs::File::open(&src)
            .await
            .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
        let stream = tokio_util::io::ReaderStream::new(file);
        let body = Body::from_stream(stream);
        Ok(Response::builder()
            .header(header::CONTENT_TYPE, content_type)
            .header(header::CONTENT_LENGTH, file_size)
            .header(header::ACCEPT_RANGES, "bytes")
            .body(body)
            .unwrap())
    }
}

#[derive(Debug, serde::Deserialize)]
struct ThumbQuery {
    frame: Option<i64>,
    x: Option<i32>,
    y: Option<i32>,
    w: Option<i32>,
    h: Option<i32>,
    trace_id: Option<i32>,
}

async fn face_thumbnail(
    State(state): State<crate::api::types::AppState>,
    Path(file_uuid): Path<String>,
    Query(q): Query<ThumbQuery>,
) -> Result<impl IntoResponse, StatusCode> {
    let videos_table = schema::table_name("videos");

    let frame = match q.frame {
        Some(f) => f,
        None => {
            let result = crate::core::processor::tkg::query_auto_representative_frame(
                state.db.pool(),
                &file_uuid,
            )
            .await
            .map_err(|_| StatusCode::NOT_FOUND)?;
            result.frame_number
        }
    };

    // Step 1: Check for pre-stored face crop if trace_id is provided
    if let Some(trace_id) = q.trace_id {
        let output_dir = crate::core::config::OUTPUT_DIR.as_str();
        let cached_path = std::path::PathBuf::from(output_dir)
            .join(".faces")
            .join(&file_uuid)
            .join(trace_id.to_string())
            .join(format!("{}.jpg", frame));

        if cached_path.exists() {
            tracing::debug!(
                "[thumbnail] Using cached face crop: {}",
                cached_path.display()
            );
            let bytes = tokio::fs::read(&cached_path).await.map_err(|e| {
                tracing::warn!("[thumbnail] Failed to read cached file: {}", e);
                StatusCode::INTERNAL_SERVER_ERROR
            })?;

            // Validate cached JPEG
            crate::core::thumbnail::validator::validate_jpeg(&bytes).map_err(|e| {
                tracing::warn!("[thumbnail] Cached JPEG validation failed: {}", e);
                StatusCode::INTERNAL_SERVER_ERROR
            })?;

            return Ok(Response::builder()
                .status(StatusCode::OK)
                .header(header::CONTENT_TYPE, "image/jpeg")
                .header(header::CACHE_CONTROL, "public, max-age=86400")
                .body(Body::from(bytes))
                .unwrap());
        }

        // Cached file not found, fallback to ffmpeg
        tracing::debug!("[thumbnail] Cached file not found, falling back to ffmpeg");
    }

    // Step 2: Fallback to ffmpeg on-demand extraction
    let row: Option<(String, Option<i64>, Option<i32>, Option<i32>)> = sqlx::query_as(&format!(
        "SELECT file_path, total_frames, width, height FROM {} WHERE file_uuid = $1",
        videos_table
    ))
    .bind(&file_uuid)
    .fetch_optional(state.db.pool())
    .await
    .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
    let (file_path, total_frames, video_width, video_height) = row.ok_or(StatusCode::NOT_FOUND)?;

    if let Some(total) = total_frames {
        if total > 0 {
            crate::core::thumbnail::validator::validate_frame(frame, total).map_err(|e| {
                tracing::warn!("[thumbnail] Frame validation failed: {}", e);
                StatusCode::BAD_REQUEST
            })?;
        }
    }

    if let (Some(x), Some(y), Some(w), Some(h)) = (q.x, q.y, q.w, q.h) {
        if let (Some(vw), Some(vh)) = (video_width, video_height) {
            crate::core::thumbnail::validator::validate_crop(x, y, w, h, vw, vh).map_err(|e| {
                tracing::warn!("[thumbnail] Crop validation failed: {}", e);
                StatusCode::BAD_REQUEST
            })?;
        }
    }

    let select = format!("select=eq(n\\,{})", frame);
    let vf = if let (Some(x), Some(y), Some(w), Some(h)) = (q.x, q.y, q.w, q.h) {
        format!("{},crop={}:{}:{}:{}", select, w, h, x, y)
    } else {
        select
    };

    let output = ffmpeg_cmd()
        .args([
            "-i",
            &file_path,
            "-vf",
            &vf,
            "-frames:v",
            "1",
            "-f",
            "image2pipe",
            "-vcodec",
            "mjpeg",
            "-",
        ])
        .output()
        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;

    if !output.status.success() {
        return Err(StatusCode::INTERNAL_SERVER_ERROR);
    }

    crate::core::thumbnail::validator::validate_jpeg(&output.stdout).map_err(|e| {
        tracing::warn!("[thumbnail] JPEG validation failed: {}", e);
        StatusCode::INTERNAL_SERVER_ERROR
    })?;

    Ok(Response::builder()
        .status(StatusCode::OK)
        .header(header::CONTENT_TYPE, "image/jpeg")
        .header(header::CACHE_CONTROL, "public, max-age=86400")
        .body(Body::from(output.stdout))
        .unwrap())
}

async fn chunk_thumbnail(
    State(state): State<crate::api::types::AppState>,
    Path((file_uuid, chunk_id)): Path<(String, String)>,
) -> Result<impl IntoResponse, StatusCode> {
    let videos_table = schema::table_name("videos");
    let chunk_table = schema::table_name("chunk");

    let output_dir = crate::core::config::OUTPUT_DIR.as_str();
    let cached_path = std::path::PathBuf::from(output_dir)
        .join(".chunk_thumbs")
        .join(&file_uuid)
        .join(format!("{}.jpg", chunk_id));

    if cached_path.exists() {
        let bytes = tokio::fs::read(&cached_path).await.map_err(|e| {
            tracing::warn!("[chunk_thumbnail] Failed to read cache: {}", e);
            StatusCode::INTERNAL_SERVER_ERROR
        })?;
        return Ok(Response::builder()
            .status(StatusCode::OK)
            .header(header::CONTENT_TYPE, "image/jpeg")
            .header(header::CACHE_CONTROL, "public, max-age=86400")
            .body(Body::from(bytes))
            .unwrap());
    }

    let row: (f64, f64, f64) = sqlx::query_as(&format!(
        "SELECT start_time, end_time, fps FROM {} WHERE file_uuid = $1 AND chunk_id = $2 LIMIT 1",
        chunk_table
    ))
    .bind(&file_uuid)
    .bind(&chunk_id)
    .fetch_optional(state.db.pool())
    .await
    .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?
    .ok_or(StatusCode::NOT_FOUND)?;

    let (start_time, end_time, fps) = row;

    let start_frame = (start_time * fps).round() as i64;
    let end_frame = (end_time * fps).round() as i64;
    let mid_frame = (start_frame + end_frame) / 2;

    let video: Option<(String, Option<i64>)> = sqlx::query_as(&format!(
        "SELECT file_path, total_frames FROM {} WHERE file_uuid = $1",
        videos_table
    ))
    .bind(&file_uuid)
    .fetch_optional(state.db.pool())
    .await
    .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
    let (file_path, total_frames) = video.ok_or(StatusCode::NOT_FOUND)?;

    let frame = match total_frames {
        Some(t) if t > 0 => mid_frame.min(t - 1).max(0),
        _ => mid_frame.max(0),
    };

    let select = format!("select=eq(n\\,{})", frame);
    let output = ffmpeg_cmd()
        .args([
            "-i",
            &file_path,
            "-vf",
            &select,
            "-frames:v",
            "1",
            "-f",
            "image2pipe",
            "-vcodec",
            "mjpeg",
            "-",
        ])
        .output()
        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;

    if !output.status.success() {
        return Err(StatusCode::INTERNAL_SERVER_ERROR);
    }

    crate::core::thumbnail::validator::validate_jpeg(&output.stdout).map_err(|e| {
        tracing::warn!("[chunk_thumbnail] JPEG validation failed: {}", e);
        StatusCode::INTERNAL_SERVER_ERROR
    })?;

    if let Some(parent) = cached_path.parent() {
        let _ = tokio::fs::create_dir_all(parent).await;
    }
    let _ = tokio::fs::write(&cached_path, &output.stdout).await;

    Ok(Response::builder()
        .status(StatusCode::OK)
        .header(header::CONTENT_TYPE, "image/jpeg")
        .header(header::CACHE_CONTROL, "public, max-age=86400")
        .body(Body::from(output.stdout))
        .unwrap())
}

#[derive(Debug, serde::Deserialize)]
struct ClipQuery {
    start_frame: Option<i64>,
    end_frame: Option<i64>,
    start_time: Option<f64>,
    end_time: Option<f64>,
    fps: Option<f64>,
    mode: Option<String>,
    audio: Option<String>,
}

async fn video_clip(
    State(state): State<crate::api::types::AppState>,
    Path(file_uuid): Path<String>,
    Query(q): Query<ClipQuery>,
) -> Result<impl IntoResponse, StatusCode> {
    let videos_table = schema::table_name("videos");
    let row: Option<(String, f64)> = sqlx::query_as(&format!(
        "SELECT file_path, COALESCE(fps, 30.0) FROM {} WHERE file_uuid = $1",
        videos_table
    ))
    .bind(&file_uuid)
    .fetch_optional(state.db.pool())
    .await
    .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
    let (file_path, db_fps) = row.ok_or(StatusCode::NOT_FOUND)?;
    let fps = q.fps.unwrap_or(db_fps);

    let (s, e) = if let (Some(sf), Some(ef)) = (q.start_frame, q.end_frame) {
        (sf as f64 / fps, ef as f64 / fps)
    } else if let (Some(st), Some(et)) = (q.start_time, q.end_time) {
        (st, et)
    } else {
        return Err(StatusCode::BAD_REQUEST);
    };
    if e <= s {
        return Err(StatusCode::BAD_REQUEST);
    }

    let mode = q.mode.as_deref().unwrap_or("normal").to_string();
    let audio = q.audio.as_deref().unwrap_or("on");

    let mut cmd = ffmpeg_cmd();
    cmd.args(["-ss", &s.to_string(), "-i", &file_path]);
    if q.start_frame.is_some() {
        let frame_count = ((e - s) * fps) as i64;
        cmd.args(["-vframes", &frame_count.to_string()]);
    } else {
        cmd.args(["-t", &(e - s).to_string()]);
    }
    if mode == "debug" {
        let debug_text = if let (Some(sf), Some(ef)) = (q.start_frame, q.end_frame) {
            format!("drawtext=text='Frame %{{n}}  FRAMES {}-{}':fontsize=28:fontcolor=white:box=1:boxcolor=black@0.6:x=10:y=10", sf, ef)
        } else {
            "drawtext=text='Frame %{n}  CLIP':fontsize=28:fontcolor=white:box=1:boxcolor=black@0.6:x=10:y=10".to_string()
        };
        cmd.args(["-vf", &debug_text]);
    }
    if audio == "off" {
        cmd.args(["-an"]);
    }
    cmd.args([
        "-c:v",
        "libx264",
        "-c:a",
        "aac",
        "-movflags",
        "frag_keyframe+empty_moov",
        "-f",
        "mp4",
        "-",
    ]);
    let output = cmd
        .output()
        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
    if !output.status.success() {
        return Err(StatusCode::INTERNAL_SERVER_ERROR);
    }

    Ok(Response::builder()
        .status(StatusCode::OK)
        .header(header::CONTENT_TYPE, "video/mp2t")
        .header(header::CACHE_CONTROL, "public, max-age=86400")
        .body(Body::from(output.stdout))
        .unwrap())
}

async fn stranger_video(
    State(state): State<crate::api::types::AppState>,
    Path((file_uuid, stranger_id)): Path<(String, i32)>,
    Query(params): Query<std::collections::HashMap<String, String>>,
) -> Result<impl IntoResponse, StatusCode> {
    stranger_video_inner(&state, &file_uuid, stranger_id, &params).await
}

async fn stranger_video_inner(
    state: &crate::api::types::AppState,
    file_uuid: &str,
    stranger_id: i32,
    params: &std::collections::HashMap<String, String>,
) -> Result<impl IntoResponse, StatusCode> {
    use axum::http::header;
    use uuid::Uuid;

    tracing::info!(
        "[stranger_video] Starting for file={}, stranger={}",
        file_uuid,
        stranger_id
    );

    let (mode, audio) = parse_video_params(&params);

    let videos_table = schema::table_name("videos");
    tracing::debug!("[stranger_video] videos_table: {}", videos_table);

    let row: Option<(String, f64, i32, i32)> = sqlx::query_as(&format!(
        "SELECT file_path, COALESCE(fps, 24.0), COALESCE(width, 0), COALESCE(height, 0) FROM {} WHERE file_uuid = $1",
        videos_table
    ))
    .bind(&file_uuid)
    .fetch_optional(state.db.pool())
    .await
    .map_err(|e| {
        tracing::error!("[stranger_video] Video query error: {}", e);
        StatusCode::INTERNAL_SERVER_ERROR
    })?;

    let (video_path, fps, _width, _height) = row.ok_or_else(|| {
        tracing::error!("[stranger_video] Video not found for uuid={}", file_uuid);
        StatusCode::NOT_FOUND
    })?;

    tracing::info!(
        "[stranger_video] Found video: path={}, fps={}",
        video_path,
        fps
    );

    // Query face detections by stranger_id from Qdrant _faces
    use crate::core::db::qdrant_db::QdrantDb;
    use serde_json::json;

    let qdrant = QdrantDb::new();
    let face_filter = json!({
        "must": [
            {"key": "file_uuid", "match": {"value": file_uuid}},
            {"key": "stranger_id", "match": {"value": stranger_id}}
        ]
    });
    let points = qdrant.scroll_all_points("_faces", face_filter, 1000).await.unwrap_or_default();

    let rows: Vec<(i64, i32, i32, i32, i32)> = points.iter()
        .filter_map(|p| {
            let payload = &p["payload"];
            let frame = payload["frame"].as_i64()?;
            let bbox = &payload["bbox"];
            let x = bbox["x"].as_f64()? as i32;
            let y = bbox["y"].as_f64()? as i32;
            let w = bbox["width"].as_f64()? as i32;
            let h = bbox["height"].as_f64()? as i32;
            Some((frame, x, y, w, h))
        })
        .collect();

    tracing::info!("[stranger_video] Found {} faces", rows.len());

    if rows.is_empty() {
        tracing::error!(
            "[stranger_video] No faces found for stranger_id={}",
            stranger_id
        );
        return Err(StatusCode::NOT_FOUND);
    }

    let first_frame = rows[0].0;
    let last_frame = rows[rows.len() - 1].0;
    let start_sec = first_frame as f64 / fps;
    let padding = params
        .get("padding")
        .and_then(|s| s.parse().ok())
        .unwrap_or(2.0);
    let duration = (last_frame - first_frame) as f64 / fps + padding * 2.0;
    let seek = (start_sec - padding).max(0.0);

    tracing::info!(
        "[stranger_video] Frame range: {} - {}, time: {:.2}s - {:.2}s",
        first_frame,
        last_frame,
        seek,
        seek + duration
    );

    // Only support normal mode for stranger video
    let tmp = std::env::temp_dir().join(format!("stranger_{}.mp4", Uuid::new_v4()));
    let tmp_str = tmp.to_str().unwrap_or("").to_string();
    let sk = seek.to_string();
    let du = duration.to_string();
    let mut cmd_args = vec!["-ss", &sk, "-i", &video_path, "-t", &du, "-c", "copy"];
    if audio == "off" {
        cmd_args.push("-an");
    }
    cmd_args.extend_from_slice(&["-y", &tmp_str]);

    tracing::debug!("[stranger_video] ffmpeg args: {:?}", cmd_args);

    let result = ffmpeg_cmd().args(&cmd_args).output().map_err(|e| {
        tracing::error!("[stranger_video] ffmpeg spawn error: {}", e);
        StatusCode::INTERNAL_SERVER_ERROR
    })?;

    if !result.status.success() {
        tracing::error!(
            "[stranger_video] ffmpeg failed: {}",
            String::from_utf8_lossy(&result.stderr)
        );
        return Err(StatusCode::INTERNAL_SERVER_ERROR);
    }

    tracing::info!(
        "[stranger_video] ffmpeg success, output size: {} bytes",
        result.stdout.len()
    );

    let data = tokio::fs::read(&tmp).await.map_err(|e| {
        tracing::error!("[stranger_video] Read output error: {}", e);
        StatusCode::INTERNAL_SERVER_ERROR
    })?;
    let _ = std::fs::remove_file(&tmp);

    tracing::info!(
        "[stranger_video] Returning video, size: {} bytes",
        data.len()
    );

    Ok(Response::builder()
        .header(header::CONTENT_TYPE, "video/mp4")
        .header(header::CONTENT_LENGTH, data.len())
        .body(Body::from(data))
        .unwrap())
}

// ── Media Proxy: Unified endpoint for WordPress frontend ──
// Accepts the same query param format as the (inactive) WordPress snippet 61.
// Dispatches to the appropriate existing handler based on `type`.
// Caddy rewrites /wp-json/momentry/v1/media → /api/v1/media-proxy{?}

/// Dispatch query params to the appropriate handler
async fn media_proxy_handler(
    State(state): State<crate::api::types::AppState>,
    Query(params): Query<std::collections::HashMap<String, String>>,
    request: axum::http::Request<Body>,
) -> Result<Response, StatusCode> {
    let uuid = params
        .get("uuid")
        .or_else(|| params.get("file_uuid"))
        .ok_or(StatusCode::BAD_REQUEST)?;

    let type_ = params
        .get("type")
        .map(String::as_str)
        .ok_or(StatusCode::BAD_REQUEST)?;

    match type_ {
        "thumbnail" => {
            let thumb_query = ThumbQuery {
                frame: params.get("frame").and_then(|v| v.parse().ok()),
                x: params.get("x").and_then(|v| v.parse().ok()),
                y: params.get("y").and_then(|v| v.parse().ok()),
                w: params.get("w").and_then(|v| v.parse().ok()),
                h: params.get("h").and_then(|v| v.parse().ok()),
                trace_id: params.get("trace_id").and_then(|v| v.parse().ok()),
            };
            face_thumbnail(State(state), Path(uuid.clone()), Query(thumb_query))
                .await
                .map(IntoResponse::into_response)
        }
        "video" => stream_video(State(state), Path(uuid.clone()), Query(params), request)
            .await
            .map(IntoResponse::into_response),
        "chunk_thumbnail" => {
            let chunk_id = params.get("chunk_id").ok_or(StatusCode::BAD_REQUEST)?;
            chunk_thumbnail(State(state), Path((uuid.clone(), chunk_id.clone())))
                .await
                .map(IntoResponse::into_response)
        }
        _ => Err(StatusCode::BAD_REQUEST),
    }
}

pub fn media_proxy_routes() -> Router<crate::api::types::AppState> {
    Router::new().route("/api/v1/media-proxy", get(media_proxy_handler))
}