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";

const UPLOAD_DIR = path.join(process.cwd(), "public", "uploads", "sounds");

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 (!file.name.toLowerCase().endsWith(".ogg")) continue;
      if (file.size > 2 * 1024 * 1024) continue;

      const ext = path.extname(file.name);
      const filename = `${uuidv4()}${ext}`;
      const filepath = path.join(UPLOAD_DIR, filename);
      const bytes = await file.arrayBuffer();
      await writeFile(filepath, Buffer.from(bytes));

      // compute duration from file size (approximate for OGG Vorbis ~64kbps)
      const duration = Math.round((file.size / (64 * 128)) * 10) / 10;

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

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