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

function requireRole(role: string) {
  return ["ADMIN", "PRODUCER", "SUPERVISOR"].includes(role);
}

// GET /api/shoot-log/recent-values?projectId=xxx
// Returns recently used values for smart autofill on new takes
export async function GET(req: NextRequest) {
  const session = await auth();
  if (!session?.user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  if (!requireRole(session.user.role))
    return NextResponse.json({ error: "Forbidden" }, { status: 403 });

  const projectId = req.nextUrl.searchParams.get("projectId");
  if (!projectId) return NextResponse.json({ error: "projectId required" }, { status: 400 });

  // Fetch the 5 most recent takes for this project to extract autofill candidates
  const recentTakes = await db.take.findMany({
    where: {
      setup: { shootDay: { projectId } },
    },
    orderBy: { createdAt: "desc" },
    take: 5,
    select: {
      cameraModel: true,
      cameraLetter: true,
      resolution: true,
      codec: true,
      fps: true,
      shutter: true,
      iso: true,
      whiteBalance: true,
      colourSpace: true,
      lensSet: true,
      lens: true,
      filters: true,
      isAnamorphic: true,
      weather: true,
      clipName: true,
    },
  });

  // Return the most recent non-null value for each field
  function latest<T>(field: keyof typeof recentTakes[0]): T | null {
    for (const take of recentTakes) {
      const v = take[field];
      if (v !== null && v !== undefined) return v as T;
    }
    return null;
  }

  return NextResponse.json({
    cameraModel: latest("cameraModel"),
    cameraLetter: latest("cameraLetter"),
    resolution: latest("resolution"),
    codec: latest("codec"),
    fps: latest("fps"),
    shutter: latest("shutter"),
    iso: latest("iso"),
    whiteBalance: latest("whiteBalance"),
    colourSpace: latest("colourSpace"),
    lensSet: latest("lensSet"),
    lens: latest("lens"),
    filters: latest("filters"),
    isAnamorphic: latest("isAnamorphic"),
    weather: latest("weather"),
    lastClipName: latest("clipName"),
  });
}