// app/api/user/unlocks/route.ts
import { NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from '@/lib/auth-options';
import { prisma } from '@/lib/prisma';
import { checkUnlockEligibility } from '@/lib/watch-progress';

export async function GET(req: Request) {
  try {
    const session = await getServerSession(authOptions);
    if (!session?.user?.email)
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });

    const userEmail = session.user.email;

    const user = await prisma.user.findUnique({
      where: { email: userEmail },
      select: { id: true },
    });
    
    if (!user)
      return NextResponse.json({ error: 'user not found' }, { status: 404 });

    // Fetch all VideoUnlock records for this user
    const unlocks = await prisma.videoUnlock.findMany({
      where: { userId: user.id },
      select: { id: true, videoId: true, unlockedAt: true, createdAt: true },
      orderBy: { unlockedAt: 'desc' },
    });

    return NextResponse.json({ unlocks });
  } catch (err: any) {
    console.error('user unlocks GET error', err);
    return NextResponse.json(
      { error: err?.message ?? 'server error' },
      { status: 500 }
    );
  }
}

export async function POST(req: Request) {
  try {
    const session = await getServerSession(authOptions);
    if (!session?.user?.email)
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });

    const userEmail = session.user.email;
    const body = await req.json();
    const { videoId } = body;

    if (!videoId) {
      return NextResponse.json({ error: 'videoId required' }, { status: 400 });
    }

    const user = await prisma.user.findUnique({
      where: { email: userEmail },
      select: { id: true },
    });
    
    if (!user)
      return NextResponse.json({ error: 'user not found' }, { status: 404 });

    // Admins can open anything; everyone else must have earned the unlock.
    const role = (session.user as any).role;
    const isAdmin = role === 'admin' || role === 'superadmin';
    if (!isAdmin) {
      const check = await checkUnlockEligibility(user.id, videoId);
      if (!check.ok) {
        return NextResponse.json({ error: check.error }, { status: check.status });
      }
      if (check.free) {
        return NextResponse.json({ message: 'Video does not need unlocking', unlock: null });
      }
    } else {
      const exists = await prisma.video.findUnique({ where: { id: videoId }, select: { id: true } });
      if (!exists) {
        return NextResponse.json({ error: 'video not found' }, { status: 404 });
      }
    }

    const unlock = await prisma.videoUnlock.upsert({
      where: { userId_videoId: { userId: user.id, videoId } },
      update: {},
      create: { userId: user.id, videoId },
    });

    return NextResponse.json({ message: 'Video unlocked successfully', unlock });

  } catch (err: any) {
    console.error('user unlocks POST error', err);
    return NextResponse.json(
      { error: err?.message ?? 'server error' },
      { status: 500 }
    );
  }
}