import { NextResponse } from "next/server";
import { z } from "zod";

import { requirePermission } from "@/lib/admin/auth";
import { pageOffset, queryAdminRows } from "@/lib/admin/database";
import {
  adminErrorResponse,
  invalidQueryResponse,
  parseListQuery,
  requestId,
  requireAdminMutation,
} from "@/lib/admin/http";

export const runtime = "nodejs";

const adjustmentSchema = z.object({
  id: z.string().uuid(),
  action: z.enum(["retry_grant", "compensate", "record_refund"]),
  expectedVersion: z.number().int().min(0),
});

type Row = {
  id: string;
  order_no: string;
  user_id: string;
  email: string | null;
  product_code: string | null;
  product_version: number | null;
  money_cents: number;
  currency: string;
  status: string;
  grant_type: string | null;
  grant_status: string;
  grant_error: string | null;
  adjustment_version: number;
  refund_status: string;
  refund_amount_cents: number | null;
  refunded_at: Date | null;
  paid_at: Date | null;
  created_at: Date;
  total_count: string;
};

type AdjustmentRow = {
  id: string;
  order_no: string;
  status: string;
  grant_status: string;
  grant_error: string | null;
  adjustment_version: number;
  refund_status: string;
  refund_amount_cents: number | null;
  refunded_at: Date | null;
  action_success: boolean;
};

export async function GET(request: Request) {
  try {
    await requirePermission("billing.orders.read");
    const parsed = parseListQuery(request);
    if (!parsed.success) return invalidQueryResponse(parsed.error.flatten());
    const query = parsed.data.q ? `%${parsed.data.q}%` : null;
    const rows = await queryAdminRows<Row>(
      `select o.id,o.order_no,o.user_id,u.email,o.product_code,o.product_version,
        o.money_cents,o.currency,o.status,o.grant_type,o.grant_status,o.grant_error,
        o.adjustment_version,o.refund_status,o.refund_amount_cents,o.refunded_at,
        o.paid_at,o.created_at,count(*) over()::text total_count
       from public.payment_orders o
       left join identity.users u on u.id=o.user_id
       where ($1::text is null or o.order_no ilike $1 or u.email ilike $1 or o.user_id::text ilike $1)
         and ($2::text is null or o.status=$2 or o.grant_status=$2 or o.refund_status=$2)
       order by o.created_at desc limit $3 offset $4`,
      [
        query,
        parsed.data.status ?? null,
        parsed.data.pageSize,
        pageOffset(parsed.data.page, parsed.data.pageSize),
      ],
    );
    return NextResponse.json({
      data: rows.map((row) => ({
        id: row.id,
        orderNo: row.order_no,
        userId: row.user_id,
        email: row.email,
        productCode: row.product_code,
        productVersion: row.product_version,
        moneyCents: row.money_cents,
        currency: row.currency,
        status: row.status,
        grantType: row.grant_type,
        grantStatus: row.grant_status,
        grantError: row.grant_error,
        adjustmentVersion: row.adjustment_version,
        refundStatus: row.refund_status,
        refundAmountCents: row.refund_amount_cents,
        refundedAt: row.refunded_at?.toISOString() ?? null,
        paidAt: row.paid_at?.toISOString() ?? null,
        createdAt: row.created_at.toISOString(),
      })),
      total: Number(rows[0]?.total_count ?? 0),
    });
  } catch (error) {
    return adminErrorResponse(error);
  }
}

export async function POST(request: Request) {
  try {
    const session = await requireAdminMutation(
      request,
      "billing.adjustments.write",
    );
    const parsed = adjustmentSchema.safeParse(
      await request.json().catch(() => null),
    );
    if (!parsed.success) return invalidQueryResponse(parsed.error.flatten());
    const rows = await queryAdminRows<AdjustmentRow>(
      `select * from public.admin_adjust_order(
        $1::uuid,$2::uuid,$3::text,$4::integer,$5::text,$6::text
      )`,
      [
        session.user.id,
        parsed.data.id,
        parsed.data.action,
        parsed.data.expectedVersion,
        "admin_console_adjust_order",
        requestId(request),
      ],
    );
    const row = rows[0];
    return NextResponse.json({
      data: row
        ? {
            id: row.id,
            orderNo: row.order_no,
            status: row.status,
            grantStatus: row.grant_status,
            grantError: row.grant_error,
            adjustmentVersion: row.adjustment_version,
            refundStatus: row.refund_status,
            refundAmountCents: row.refund_amount_cents,
            refundedAt: row.refunded_at?.toISOString() ?? null,
            actionSuccess: row.action_success,
          }
        : null,
    });
  } catch (error) {
    return adminErrorResponse(error);
  }
}