import { NextResponse } from "next/server";
import { getSupabaseAdmin } from "@/lib/admin";
import { NewCrawlerService } from "@/services/newCrawlerService";

export async function POST(request: Request) {
  try {
    // Parse request body
    let websiteId;
    try {
      const body = await request.json();
      websiteId = body.websiteId;

      // Normalize the websiteId to ensure consistent format
      websiteId = String(websiteId).trim().toLowerCase();
      console.log("Processing website ID:", websiteId);
    } catch (parseError) {
      console.error("Error parsing request body:", parseError);
      return NextResponse.json(
        { error: "Invalid request format" },
        { status: 400 },
      );
    }

    // Validate input
    if (!websiteId) {
      return NextResponse.json(
        { error: "Website ID is required" },
        { status: 400 },
      );
    }

    // Fetch website details using admin client (bypasses RLS)
    const { data: websites, error: websiteError } = await getSupabaseAdmin()
      .from("websites")
      .select("id, name, base_url")
      .eq("id", websiteId);

    if (websiteError) {
      console.error("Website query error:", websiteError);
      return NextResponse.json(
        { error: `Database error: ${websiteError.message}` },
        { status: 500 },
      );
    }

    // Check if website exists
    if (!websites || websites.length === 0) {
      console.error("Website not found with ID:", websiteId);

      // Try to find similar websites for debugging
      const { data: allWebsites } = await getSupabaseAdmin()
        .from("websites")
        .select("id, name, base_url");

      console.log(`Found ${allWebsites?.length || 0} total websites`);

      // Log available IDs for comparison
      const availableIds =
        allWebsites?.map((w) => String(w.id).toLowerCase()) || [];
      console.log("Available website IDs:", availableIds);

      return NextResponse.json({ 
        error: "Website not found",
        debug: {
          requestedId: websiteId,
          availableIds: availableIds,
          totalWebsites: allWebsites?.length || 0
        }
      }, { status: 404 });
    }

    // Website found, proceed with crawl
    const website = websites[0];
    console.log("Found website:", website.name, website.base_url);

    // Create a new crawl session (using admin client)
    const { data: sessions, error: sessionError } = await getSupabaseAdmin()
      .from("crawl_sessions")
      .insert([
        {
          website_id: website.id, // Use the ID from the database
          status: "pending",
          start_url: website.base_url,
          total_urls: 0,
          processed_urls: 0,
          progress_percentage: 0,
          pages_discovered: 0,
          pages_processed: 0,
        },
      ])
      .select();

    if (sessionError) {
      console.error("Failed to create crawl session:", sessionError);
      console.error("Session error details:", {
        message: sessionError.message,
        details: sessionError.details,
        hint: sessionError.hint,
        code: sessionError.code
      });
      return NextResponse.json(
        { 
          error: "Failed to create crawl session",
          details: sessionError.message,
          code: sessionError.code
        },
        { status: 500 },
      );
    }

    if (!sessions || sessions.length === 0) {
      return NextResponse.json(
        { error: "Session was created but not returned" },
        { status: 500 },
      );
    }

    const session = sessions[0] as { id: string };
    console.log("Created crawl session:", session.id);

    // Start crawler in background
    const crawler = new NewCrawlerService(String(website.id), String(session.id));
    crawler.startCrawl().catch((err) => {
      console.error("Crawler error:", err);
    });

    // Return successful response
    return NextResponse.json({
      success: true,
      message: "Crawl started",
      sessionId: session.id,
    });
  } catch (error) {
    // Catch-all error handler
    console.error("Crawl initialization error:", error);
    return NextResponse.json(
      { error: "Failed to start crawl: " + (error) },
      { status: 500 },
    );
  }
}