import { NextResponse } from "next/server";
import { stripeClient } from "../../../../../lib/stripeClient";
import { prisma } from "../../../../../lib/prisma";
import { getServerSession } from "next-auth";
import { authOptions } from "../../../../../lib/auth";

export async function POST(req: Request) {
  try {
    const session = await getServerSession(authOptions);
    if (!session?.user?.email) {
      return NextResponse.json({ error: "Unauthorized." }, { status: 401 });
    }

    const body = await req.json();
    const displayName = body.displayName as string;
    const contactEmail = body.contactEmail as string;
    const slug = body.slug as string;
    const website = body.website as string | undefined;

    if (!displayName || !contactEmail || !slug) {
      return NextResponse.json(
        { error: "displayName, contactEmail, and slug are required." },
        { status: 400 }
      );
    }

    // Create a V2 connected account with the exact properties requested.
    const account = await stripeClient.v2.core.accounts.create({
      display_name: displayName,
      contact_email: contactEmail,
      identity: {
        country: "us",
      },
      dashboard: "full",
      defaults: {
        responsibilities: {
          fees_collector: "stripe",
          losses_collector: "stripe",
        },
      },
      configuration: {
        customer: {},
        merchant: {
          capabilities: {
            card_payments: {
              requested: true,
            },
          },
        },
      },
    });

    // Persist mapping between your store slug and account.id.
    const user = await prisma.user.findUnique({
      where: { email: session.user.email },
    });
    if (!user) {
      return NextResponse.json({ error: "User not found." }, { status: 404 });
    }

    const existing = await prisma.store.findUnique({ where: { slug } });
    if (existing && existing.userId !== user.id) {
      return NextResponse.json({ error: "Slug already in use." }, { status: 409 });
    }

    let defaultSellingPreferences: any = null;
    if (process.env.STORE_DEFAULT_SELLING_PREFERENCES) {
      try {
        defaultSellingPreferences = JSON.parse(
          process.env.STORE_DEFAULT_SELLING_PREFERENCES
        );
      } catch {
        defaultSellingPreferences = {
          raw: process.env.STORE_DEFAULT_SELLING_PREFERENCES,
        };
      }
    }

    await prisma.store.upsert({
      where: { userId: user.id },
      update: {
        slug,
        stripeAccountId: account.id,
        name: displayName,
        website: website || process.env.STORE_DEFAULT_WEBSITE || null,
        defaultSellingPreferences,
      },
      create: {
        userId: user.id,
        slug,
        stripeAccountId: account.id,
        name: displayName,
        website: website || process.env.STORE_DEFAULT_WEBSITE || null,
        defaultSellingPreferences,
      },
    });

    return NextResponse.json({ accountId: account.id, slug });
  } catch (err: any) {
    return NextResponse.json(
      { error: err?.message || "Failed to create connected account." },
      { status: 500 }
    );
  }
}