import { NextRequest, NextResponse } from "next/server";
import crypto from "node:crypto";
import { z } from "zod";
import { db, apiKeys, eq, sql } from "@epicure/db";
import { requireSession } from "@/lib/api-auth";

const CreateApiKeyBody = z.object({
  name: z.string().min(1).max(100),
});

export async function GET() {
  const { session, response } = await requireSession();
  if (response) return response;

  const rows = await db
    .select({
      id: apiKeys.id,
      name: apiKeys.name,
      lastUsedAt: apiKeys.lastUsedAt,
      createdAt: apiKeys.createdAt,
    })
    .from(apiKeys)
    .where(eq(apiKeys.userId, session!.user.id));

  return NextResponse.json(rows);
}

export async function POST(req: NextRequest) {
  const { session, response } = await requireSession();
  if (response) return response;

  const body = await req.json() as unknown;
  const parsed = CreateApiKeyBody.safeParse(body);
  if (!parsed.success) {
    return NextResponse.json(
      { error: "Validation error", issues: parsed.error.issues },
      { status: 400 }
    );
  }

  const [row] = await db
    .select({ count: sql<number>`count(*)::int` })
    .from(apiKeys)
    .where(eq(apiKeys.userId, session!.user.id));
  if ((row?.count ?? 0) >= 10) {
    return NextResponse.json({ error: "API key limit reached (max 10)" }, { status: 403 });
  }

  const rawKey = "ek_" + crypto.randomBytes(32).toString("hex");
  const keyHash = crypto.createHash("sha256").update(rawKey).digest("hex");
  const id = crypto.randomUUID();
  const now = new Date();

  await db.insert(apiKeys).values({
    id,
    userId: session!.user.id,
    name: parsed.data.name,
    keyHash,
    createdAt: now,
  });

  return NextResponse.json(
    { id, name: parsed.data.name, key: rawKey, createdAt: now.toISOString() },
    { status: 201 }
  );
}