import { NextRequest, NextResponse } from "next/server";
import { db } from "@/lib/db";

function isAuthorized(req: NextRequest): boolean {
  const apiKey = process.env.API_SECRET_KEY;
  if (!apiKey) return false;

  const authHeader = req.headers.get("authorization") ?? "";
  if (authHeader.startsWith("Bearer ")) {
    return authHeader.slice(7) === apiKey;
  }
  const headerKey = req.headers.get("x-api-key") ?? "";
  return headerKey === apiKey;
}

// ── GET /api/ext/shots/[shotId] ───────────────────────────────────────────────
//
// Returns full shot detail including tasks and latest version status.
// Accepts either the database id or the shotCode via query param:
//   /api/ext/shots/<id>
//   /api/ext/shots/<shotCode>?byCode=1&projectId=<projectId>

export async function GET(
  req: NextRequest,
  { params }: { params: Promise<{ shotId: string }> }
) {
  if (!isAuthorized(req)) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }

  const { shotId } = await params;
  const { searchParams } = new URL(req.url);
  const byCode    = searchParams.get("byCode") === "1";
  const projectId = searchParams.get("projectId") ?? undefined;

  const shot = await db.shot.findFirst({
    where: byCode
      ? { shotCode: shotId, ...(projectId ? { projectId } : {}) }
      : { id: shotId },
    select: {
      id:          true,
      shotCode:    true,
      scene:       true,
      episode:     true,
      shotNumber:  true,
      description: true,
      status:      true,
      priority:    true,
      frameStart:  true,
      frameEnd:    true,
      fps:         true,
      dueDate:      true,
      sourceClip:   true,
      timecodeStart: true,
      timecodeEnd:   true,
      clipDuration:  true,
      exrOutput:          true,
      seqTimecodeStart: true,
      seqTimecodeEnd:   true,
      shotVersion:      true,
      createdAt:    true,
      updatedAt:    true,
      project: {
        select: { id: true, name: true, code: true, showId: true },
      },
      artist: {
        select: { id: true, name: true, email: true },
      },
      tasks: {
        orderBy: { sortOrder: "asc" },
        select: {
          id:             true,
          title:          true,
          type:           true,
          status:         true,
          priority:       true,
          estimatedHours: true,
          dueDate:        true,
          assignedArtist: { select: { id: true, name: true, email: true } },
          _count:         { select: { versions: true } },
        },
      },
      versions: {
        orderBy:  { versionNumber: "desc" },
        take:     1,
        select: {
          id:             true,
          versionNumber:  true,
          approvalStatus: true,
          createdAt:      true,
          artist:         { select: { id: true, name: true, email: true } },
        },
      },
      _count: {
        select: { versions: true, tasks: true },
      },
    },
  });

  if (!shot) {
    return NextResponse.json({ error: "Shot not found" }, { status: 404 });
  }

  return NextResponse.json({ shot });
}

// ── PATCH /api/ext/shots/[shotId] ─────────────────────────────────────────────
//
// Update mutable shot fields from pipeline tools.
// Currently supports: shotVersion (format v###)
//
// Body (JSON): { shotVersion?: string }
// Returns: { success: true, shot: { id, shotVersion } }

export async function PATCH(
  req: NextRequest,
  { params }: { params: Promise<{ shotId: string }> }
) {
  if (!isAuthorized(req)) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }

  const { shotId } = await params;
  const body = await req.json().catch(() => ({}));
  const { shotVersion } = body as { shotVersion?: string };

  if (shotVersion !== undefined) {
    if (!/^v\d{3}$/.test(shotVersion)) {
      return NextResponse.json(
        { error: "shotVersion must match format v### (e.g. v001)" },
        { status: 400 }
      );
    }
  } else {
    return NextResponse.json({ error: "No updatable fields provided" }, { status: 400 });
  }

  const shot = await db.shot.findUnique({
    where: { id: shotId },
    select: { id: true },
  });
  if (!shot) {
    return NextResponse.json({ error: "Shot not found" }, { status: 404 });
  }

  const updated = await db.shot.update({
    where: { id: shotId },
    data: { ...(shotVersion !== undefined && { shotVersion }) },
    select: { id: true, shotVersion: true },
  });

  return NextResponse.json({ success: true, shot: updated });
}