import { NextRequest, NextResponse } from 'next/server';
import { MetaCrawlClient } from '@/lib/providers/meta-crawl-client';

/**
 * POST /api/meta/video
 * 
 * Generate a video from a text prompt using Meta AI.
 * Video generation takes 30-60+ seconds, so this endpoint may take a while.
 */
export async function POST(req: NextRequest) {
    try {
        const { prompt, cookies: clientCookies } = await req.json();

        if (!prompt) {
            return NextResponse.json({ error: "Prompt is required" }, { status: 400 });
        }

        // Get cookies from request body or cookie header
        let cookieString = clientCookies || req.cookies.get('meta_cookies')?.value;

        if (!cookieString) {
            return NextResponse.json(
                { error: "Meta AI cookies not found. Please configure settings." },
                { status: 401 }
            );
        }

        console.log(`[Meta Video API] Starting video generation for prompt: "${prompt.substring(0, 50)}..."`);

        const client = new MetaCrawlClient();

        // Check if crawl4ai service is available
        const isHealthy = await client.healthCheck();
        if (!isHealthy) {
            return NextResponse.json(
                { error: "Meta AI video service is not available. Make sure crawl4ai is running." },
                { status: 503 }
            );
        }

        // Generate video - this can take 30-60+ seconds
        const result = await client.generateVideo(prompt, cookieString);

        if (!result.success || result.videos.length === 0) {
            throw new Error(result.error || "No videos generated");
        }

        console.log(`[Meta Video API] Successfully generated ${result.videos.length} video(s)`);

        return NextResponse.json({
            success: true,
            videos: result.videos,
            conversation_id: result.conversation_id
        });

    } catch (error: unknown) {
        const err = error as Error;
        console.error("[Meta Video API] Error:", err.message);

        const msg = err.message || "";
        const isAuthError = msg.includes("401") || msg.includes("403") ||
            msg.includes("auth") || msg.includes("cookies") || msg.includes("expired");

        return NextResponse.json(
            { error: err.message || "Video generation failed" },
            { status: isAuthError ? 401 : 500 }
        );
    }
}