import { NextRequest, NextResponse } from "next/server";
import { getServerSession } from "@/lib/auth";
import { db } from "@/lib/db";
import { sounds } from "@/lib/db/schema";
import { writeFile, mkdir, unlink } from "fs/promises";
import path from "path";
import { v4 as uuidv4 } from "uuid";
import { eq } from "drizzle-orm";
import { convertToCompressedMp3 } from "@/lib/convert";

export const maxDuration = 120;

const UPLOAD_DIR = path.join(process.cwd(), "data", "uploads", "sounds");
const ALLOWED_EXTENSIONS = /\.(mp3|ogg|wav|flac|aac|m4a|wma|opus|webm|mp4|avi|mov|mkv|webm|wmv|flv)$/i;
const MAX_SIZE = 50 * 1024 * 1024; // 50 MB

export async function GET() {
  const session = await getServerSession();
  if (!session || !session.isAdmin) {
    return NextResponse.json({ error: "Forbidden" }, { status: 403 });
  }
  try {
    const all = db.select().from(sounds).orderBy(sounds.createdAt).all();
    const list = all.map(s => ({
      id: s.id,
      originalName: s.originalName,
      url: `/uploads/sounds/${s.storedFilename}`,
      duration: s.duration,
    }));
    return NextResponse.json({ sounds: list });
  } catch {
    return NextResponse.json({ sounds: [] });
  }
}

export async function POST(req: NextRequest) {
  const session = await getServerSession();
  if (!session || !session.isAdmin) {
    return NextResponse.json({ error: "Forbidden" }, { status: 403 });
  }
  try {
    const formData = await req.formData();
    const files = formData.getAll("files") as File[];
    if (!files.length) return NextResponse.json({ error: "No files" }, { status: 400 });

    await mkdir(UPLOAD_DIR, { recursive: true });
    const results: { url: string; originalName: string; duration: number }[] = [];

    for (const file of files) {
      if (!ALLOWED_EXTENSIONS.test(file.name)) continue;
      if (file.size > MAX_SIZE) continue;

      const baseName = uuidv4();
      const inputPath = path.join(UPLOAD_DIR, `${baseName}.in`);
      const mp3Path = path.join(UPLOAD_DIR, `${baseName}.mp3`);

      const bytes = await file.arrayBuffer();
      await writeFile(inputPath, Buffer.from(bytes));

      let storedFilename: string;
      if (convertToCompressedMp3(inputPath, mp3Path)) {
        await unlink(inputPath).catch(() => {});
        storedFilename = `${baseName}.mp3`;
      } else {
        await unlink(inputPath).catch(() => {});
        continue;
      }

      const id = uuidv4();
      db.insert(sounds).values({
        id,
        originalName: file.name,
        storedFilename,
        duration: 6,
        uploadedBy: session.id,
        createdAt: new Date().toISOString(),
      }).run();

      results.push({ url: `/uploads/sounds/${storedFilename}`, originalName: file.name, duration: 6 });
    }

    return NextResponse.json({ sounds: results });
  } catch {
    return NextResponse.json({ error: "Upload failed" }, { status: 500 });
  }
}

export async function DELETE(req: NextRequest) {
  const session = await getServerSession();
  if (!session || !session.isAdmin) {
    return NextResponse.json({ error: "Forbidden" }, { status: 403 });
  }
  const filename = req.nextUrl.searchParams.get("filename");
  if (!filename) return NextResponse.json({ error: "No filename" }, { status: 400 });
  try {
    const filepath = path.join(UPLOAD_DIR, filename);
    await unlink(filepath).catch(() => {});
    db.delete(sounds).where(eq(sounds.storedFilename, filename)).run();
    return NextResponse.json({ success: true });
  } catch {
    return NextResponse.json({ error: "Delete failed" }, { status: 500 });
  }
}