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

type RouteParams = { params: Promise<{ videoId: string }> };

// GET /api/watch/[videoId] - Public watch endpoint (no projectId needed)
export async function GET(request: NextRequest, { params }: RouteParams) {
    try {
        const session = await auth();
        const { videoId } = await params;

        const video = await db.video.findUnique({
            where: { id: videoId },
            include: {
                project: {
                    include: {
                        members: { where: { userId: session?.user?.id || '' } },
                    },
                },
                versions: {
                    orderBy: { versionNumber: 'desc' },
                    include: {
                        comments: {
                            orderBy: { timestamp: 'asc' },
                            where: { parentId: null },
                            include: {
                                author: { select: { id: true, name: true, image: true } },
                                replies: {
                                    orderBy: { createdAt: 'asc' },
                                    include: {
                                        author: { select: { id: true, name: true, image: true } },
                                    },
                                },
                            },
                        },
                        _count: { select: { comments: true } },
                    },
                },
            },
        });

        if (!video) {
            return NextResponse.json({ error: 'Video not found' }, { status: 404 });
        }

        // Check access
        const isOwner = session?.user?.id === video.project.ownerId;
        const isMember = video.project.members.length > 0;
        const isPublic = video.project.visibility === 'PUBLIC';

        if (!isOwner && !isMember && !isPublic) {
            return NextResponse.json({ error: 'Access denied' }, { status: 403 });
        }

        // Include auth context so the client knows if the viewer is a guest
        const { project, ...videoData } = video;
        return NextResponse.json({
            ...videoData,
            projectId: video.projectId,
            project: {
                name: project.name,
                ownerId: project.ownerId,
                visibility: project.visibility,
            },
            isAuthenticated: !!session?.user?.id,
            canComment: isOwner || isMember || isPublic,
        });
    } catch (error) {
        console.error('Error fetching video:', error);
        return NextResponse.json(
            { error: 'Failed to fetch video' },
            { status: 500 }
        );
    }
}