import { useState } from 'react';
import { Alert, Form, Input, InputNumber, Modal, Space, Tag, message } from 'antd';
import { ProCard } from '@ant-design/pro-components';
import { useQuery, useQueryClient } from '@tanstack/react-query';
import type { ColDef } from '@ag-grid-community/core';
import PageContainer from '@/components/common/PageContainer';
import SearchForm from '@/components/common/SearchForm';
import DataGrid from '@/components/common/DataGrid';
import PermissionButton from '@/components/common/PermissionButton';
import { operationApi, GuaranteeInsuranceRow } from '@/api/operation';
import { GRAY, RADIUS, SHADOW } from '@/theme/tokens';

const fmt = (v: unknown) => (v as number)?.toLocaleString() ?? '-';
const cardStyle = { background: '#fff', borderRadius: RADIUS.lg, border: `1px solid ${GRAY[100]}`, boxShadow: SHADOW.sm };

const STATUS_COLOR: Record<string, string> = { ACTIVE: 'green', EXPIRED: 'default', CANCELLED: 'red' };
const STATUS_LABEL: Record<string, string> = { ACTIVE: '유효', EXPIRED: '만료', CANCELLED: '해지' };

const COLS: ColDef<GuaranteeInsuranceRow>[] = [
  { field: 'agentName',       headerName: '설계사',   width: 130 },
  { field: 'policyNo',        headerName: '증권번호', width: 160 },
  { field: 'carrierName',     headerName: '보증보험사', width: 130 },
  { field: 'guaranteeAmount', headerName: '보증금액', width: 150, type: 'numericColumn', valueFormatter: (p) => fmt(p.value) },
  { field: 'startDate',       headerName: '시작일',   width: 110 },
  { field: 'endDate',         headerName: '종료일',   width: 110 },
  { field: 'status',          headerName: '상태',     width: 100,
    cellRenderer: (p: { value: string }) => (
      <Tag color={STATUS_COLOR[p.value] ?? 'default'}>{STATUS_LABEL[p.value] ?? p.value}</Tag>
    ) },
];

export default function GuaranteeInsurance() {
  const qc = useQueryClient();
  const [searchParams, setSearchParams] = useState<{ agentName?: string; status?: string }>({});
  const [modalOpen, setModalOpen] = useState(false);
  const [editingRow, setEditingRow] = useState<GuaranteeInsuranceRow | null>(null);
  const [form] = Form.useForm();

  const { data, isLoading, isError } = useQuery({
    queryKey: ['guarantee-insurance', 'list', searchParams],
    queryFn: () => operationApi.guaranteeInsuranceList(searchParams),
    retry: false,
  });

  const rows = data?.list ?? [];

  const openCreate = () => { setEditingRow(null); form.resetFields(); setModalOpen(true); };
  const openEdit = (row: GuaranteeInsuranceRow) => { setEditingRow(row); form.setFieldsValue(row); setModalOpen(true); };

  const handleSave = async () => {
    const values = await form.validateFields();
    try {
      if (editingRow) {
        await operationApi.guaranteeInsuranceUpdate(editingRow.guaranteeId, values);
        message.success('수정 완료');
      } else {
        await operationApi.guaranteeInsuranceCreate(values);
        message.success('등록 완료');
      }
      qc.invalidateQueries({ queryKey: ['guarantee-insurance', 'list'] });
      setModalOpen(false);
    } catch { /* request.ts 처리 */ }
  };

  const handleDelete = (id: number) => Modal.confirm({
    title: '보증보험 삭제', content: '삭제하시겠습니까?',
    onOk: async () => {
      await operationApi.guaranteeInsuranceDelete(id);
      message.success('삭제 완료');
      qc.invalidateQueries({ queryKey: ['guarantee-insurance', 'list'] });
    },
  });

  const actionCol: ColDef<GuaranteeInsuranceRow> = {
    headerName: '액션', width: 160, pinned: 'right',
    cellRenderer: (p: { data: GuaranteeInsuranceRow }) => (
      <Space>
        <PermissionButton menuCode="GUARANTEE_INS" permCode="UPDATE" size="small" onClick={() => openEdit(p.data)}>수정</PermissionButton>
        <PermissionButton menuCode="GUARANTEE_INS" permCode="DELETE" size="small" danger onClick={() => handleDelete(p.data.guaranteeId)}>삭제</PermissionButton>
      </Space>
    ),
  };

  return (
    <PageContainer title="보증보험" description="설계사 신원보증보험 가입현황 관리">
      {isError && (
        <Alert type="warning" showIcon message="API 미응답" description="/api/guarantee-insurances 를 확인하세요." style={{ marginBottom: 16 }} />
      )}

      <SearchForm
        conditions={[
          { type: 'text', name: 'agentName', label: '설계사명', span: 6 },
          { type: 'text', name: 'status',    label: '상태',     span: 6 },
        ]}
        onSearch={(v) => setSearchParams({ agentName: v.agentName as string, status: v.status as string })}
        onReset={() => setSearchParams({})}
      />

      <ProCard style={cardStyle}>
        <div style={{ marginBottom: 12 }}>
          <PermissionButton menuCode="GUARANTEE_INS" permCode="CREATE" type="primary" onClick={openCreate}>
            + 보증보험 등록
          </PermissionButton>
        </div>
        <DataGrid<GuaranteeInsuranceRow>
          rows={rows}
          columns={[...COLS, actionCol]}
          loading={isLoading}
          height={520}
          rowKey="guaranteeId"
        />
      </ProCard>

      <Modal
        title={editingRow ? '보증보험 수정' : '보증보험 등록'}
        open={modalOpen}
        onOk={handleSave}
        onCancel={() => setModalOpen(false)}
        okText="저장"
        cancelText="취소"
      >
        <Form form={form} layout="vertical">
          <Form.Item name="agentId" label="설계사ID" rules={[{ required: true }]}>
            <InputNumber style={{ width: '100%' }} min={1} />
          </Form.Item>
          <Form.Item name="policyNo" label="증권번호" rules={[{ required: true }]}>
            <Input />
          </Form.Item>
          <Form.Item name="carrierId" label="보증보험사ID">
            <InputNumber style={{ width: '100%' }} min={1} />
          </Form.Item>
          <Form.Item name="guaranteeAmount" label="보증금액" rules={[{ required: true }]}>
            <InputNumber style={{ width: '100%' }} min={0} />
          </Form.Item>
          <Form.Item name="startDate" label="보증시작(YYYY-MM-DD)" rules={[{ required: true }]}>
            <Input placeholder="2025-01-01" />
          </Form.Item>
          <Form.Item name="endDate" label="보증종료(YYYY-MM-DD)" rules={[{ required: true }]}>
            <Input placeholder="2026-01-01" />
          </Form.Item>
          <Form.Item name="status" label="상태">
            <Input placeholder="ACTIVE / EXPIRED / CANCELLED" />
          </Form.Item>
        </Form>
      </Modal>
    </PageContainer>
  );
}