import { useEffect, useState, useCallback } from 'react'
import {
  Card,
  Table,
  Typography,
  Space,
  Select,
  Tag,
  message,
  Button,
  Modal,
  Form,
  Input,
  InputNumber,
  Radio,
  Statistic,
  Row,
  Col,
  Image,
} from 'antd'
import {
  WalletOutlined,
  PlusOutlined,
  DollarCircleOutlined,
  LockOutlined,
  CheckCircleOutlined,
  HourglassOutlined,
} from '@ant-design/icons'
import {
  fetchSiteWallet,
  fetchSiteWithdrawals,
  applySiteWithdrawal,
  listSites,
  formatMoney,
  getMe,
  type SiteWallet,
  type SiteWithdrawal,
  type Site,
} from '../api'
import { useMember } from '../MemberContext'

const STATUS_CONFIG: Record<string, { label: string; color: string }> = {
  pending: { label: '待审核', color: 'orange' },
  processing: { label: '处理中/审核通过', color: 'blue' },
  completed: { label: '已打款', color: 'success' },
  rejected: { label: '已拒绝', color: 'error' },
}

export default function Wallet() {
  const member = useMember()
  const [sites, setSites] = useState<Site[]>([])
  const [siteID, setSiteID] = useState<number | undefined>(member?.site_id)
  const [wallet, setWallet] = useState<SiteWallet | null>(null)
  const [withdrawals, setWithdrawals] = useState<SiteWithdrawal[]>([])
  const [total, setTotal] = useState(0)
  const [page, setPage] = useState(1)
  const pageSize = 20
  const [loading, setLoading] = useState(false)
  const [modalVisible, setModalVisible] = useState(false)
  const [submitting, setSubmitting] = useState(false)

  const [form] = Form.useForm()

  const loadData = useCallback(async (targetPage: number) => {
    if (!siteID) return
    setLoading(true)
    try {
      const [walletRes, wdRes] = await Promise.all([
        fetchSiteWallet(siteID),
        fetchSiteWithdrawals(siteID, targetPage, pageSize),
      ])
      setWallet(walletRes)
      setWithdrawals(wdRes.items)
      setTotal(wdRes.total)
      setPage(wdRes.page)
    } catch {
      message.error('加载钱包与提现数据失败')
    } finally {
      setLoading(false)
    }
  }, [siteID])

  useEffect(() => {
    async function init() {
      let currentMember = member
      if (!currentMember) {
        try {
          currentMember = await getMe()
        } catch {
          // ignore
        }
      }
      const activeSiteID = currentMember?.site_id
      if (activeSiteID) {
        setSiteID(activeSiteID)
      }

      if (currentMember?.is_superadmin) {
        try {
          const rows = await listSites()
          setSites(rows)
          if (!activeSiteID && rows.length > 0) {
            setSiteID(rows[0].id)
          }
        } catch {
          // ignore
        }
      }
    }
    void init()
  }, [member])

  useEffect(() => {
    void loadData(1)
  }, [loadData])

  async function handleApplyWithdrawal(values: {
    amount: number
    account_type: 'alipay' | 'bank'
    account_name: string
    account_no: string
    bank_name?: string
    bank_branch?: string
  }) {
    if (!siteID) return
    const amountCent = Math.round(values.amount * 100)
    if (amountCent <= 0) {
      message.error('提现金额必须大于0')
      return
    }
    if (wallet && amountCent > wallet.available_balance_cent) {
      message.error('提现金额不能超过当前可提现余额')
      return
    }

    setSubmitting(true)
    try {
      await applySiteWithdrawal({
        site_id: siteID,
        amount_cent: amountCent,
        account_type: values.account_type,
        account_name: values.account_name,
        account_no: values.account_no,
        bank_name: values.bank_name,
        bank_branch: values.bank_branch,
      })
      message.success('提现申请提交成功，请等待主站财务审核打款')
      setModalVisible(false)
      form.resetFields()
      void loadData(1)
    } catch (error: unknown) {
      const respMessage = (error as { response?: { data?: { message?: string } } })?.response?.data?.message
      message.error(respMessage || '提现申请提交失败')
    } finally {
      setSubmitting(false)
    }
  }

  const selectedSite = sites.find((s) => s.id === siteID)

  return (
    <Space direction="vertical" className="page" style={{ width: '100%' }}>
      <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
        <div>
          <Typography.Title level={3} style={{ marginBottom: 4 }}>
            资金管理与商户提现
          </Typography.Title>
          <Typography.Text type="secondary">
            查看分销结算收益到账情况，申请提取收益并实时追踪财务打款流水。
            {wallet?.settlement_hold_days != null
              ? ` 当前站点冷却期 ${wallet.settlement_hold_days} 天。`
              : ''}
          </Typography.Text>
        </div>
        <Space>
          {member?.is_superadmin && sites.length > 1 && (
            <Select
              placeholder="分销网站"
              style={{ width: 220 }}
              value={siteID}
              options={sites.map((site) => ({ label: `${site.site_name} (${site.site_code})`, value: site.id }))}
              onChange={(value) => setSiteID(value)}
            />
          )}
          <Button
            type="primary"
            icon={<PlusOutlined />}
            onClick={() => {
              form.setFieldsValue({ account_type: 'alipay' })
              setModalVisible(true)
            }}
            disabled={!wallet || wallet.available_balance_cent <= 0}
          >
            申请提现
          </Button>
        </Space>
      </div>

      <Row gutter={16}>
        <Col flex="1">
          <Card bordered={false} style={{ background: 'linear-gradient(135deg, #1677ff 0%, #0958d9 100%)', color: '#fff' }}>
            <Statistic
              title={<span style={{ color: 'rgba(255,255,255,0.85)' }}>可提现余额</span>}
              value={((wallet?.available_balance_cent ?? 0) / 100).toFixed(2)}
              prefix={<WalletOutlined style={{ color: '#fff' }} />}
              suffix="元"
              valueStyle={{ color: '#fff', fontSize: 28, fontWeight: 'bold' }}
            />
          </Card>
        </Col>
        <Col flex="1">
          <Card bordered={false} style={{ background: '#fafafa' }}>
            <Statistic
              title="待释放收益 (冷却期内)"
              value={((wallet?.pending_release_cent ?? 0) / 100).toFixed(2)}
              prefix={<HourglassOutlined style={{ color: '#1677ff' }} />}
              suffix="元"
              valueStyle={{ color: '#1677ff' }}
            />
          </Card>
        </Col>
        <Col flex="1">
          <Card bordered={false} style={{ background: '#fafafa' }}>
            <Statistic
              title="冻结中余额 (提现审核中)"
              value={((wallet?.frozen_balance_cent ?? 0) / 100).toFixed(2)}
              prefix={<LockOutlined style={{ color: '#faad14' }} />}
              suffix="元"
              valueStyle={{ color: '#faad14' }}
            />
          </Card>
        </Col>
        <Col flex="1">
          <Card bordered={false} style={{ background: '#fafafa' }}>
            <Statistic
              title="累计已结算收益"
              value={((wallet?.total_settled_cent ?? 0) / 100).toFixed(2)}
              prefix={<DollarCircleOutlined style={{ color: '#52c41a' }} />}
              suffix="元"
              valueStyle={{ color: '#52c41a' }}
            />
          </Card>
        </Col>
        <Col flex="1">
          <Card bordered={false} style={{ background: '#fafafa' }}>
            <Statistic
              title="累计已成功提现"
              value={((wallet?.total_withdrawn_cent ?? 0) / 100).toFixed(2)}
              prefix={<CheckCircleOutlined style={{ color: '#13c2c2' }} />}
              suffix="元"
              valueStyle={{ color: '#13c2c2' }}
            />
          </Card>
        </Col>
      </Row>

      <Card title="提现记录明细">
        <Table
          rowKey="id"
          loading={loading}
          dataSource={withdrawals}
          pagination={{
            current: page,
            pageSize,
            total,
            showTotal: (tot) => `共 ${tot} 条提现记录`,
            onChange: (p) => void loadData(p),
          }}
          scroll={{ x: 1100 }}
          columns={[
            {
              title: '提现单号',
              dataIndex: 'withdraw_no',
              width: 200,
              render: (v: string) => (
                <div style={{ whiteSpace: 'nowrap' }}>
                  <Typography.Text
                    copyable={{ text: v, tooltips: ['复制单号', '已复制'] }}
                    strong
                    style={{
                      fontFamily: 'monospace',
                      fontSize: 13,
                      whiteSpace: 'nowrap',
                      display: 'inline-flex',
                      alignItems: 'center',
                    }}
                  >
                    {v}
                  </Typography.Text>
                </div>
              ),
            },
            {
              title: '提现金额',
              dataIndex: 'amount_cent',
              width: 140,
              render: (v: number) => (
                <Typography.Text strong style={{ color: '#cf1322', fontSize: 15 }}>
                  {formatMoney(v)}
                </Typography.Text>
              ),
            },
            {
              title: '收款账户',
              width: 220,
              render: (_: unknown, row: SiteWithdrawal) => (
                <div>
                  <Space size={4}>
                    <Tag color={row.account_type === 'alipay' ? 'blue' : 'gold'}>
                      {row.account_type === 'alipay' ? '支付宝' : '银行卡'}
                    </Tag>
                    <Typography.Text strong>{row.account_name}</Typography.Text>
                  </Space>
                  <div style={{ fontSize: 12, color: '#666', marginTop: 2 }}>{row.account_no}</div>
                  {row.bank_name && (
                    <div style={{ fontSize: 11, color: '#999' }}>
                      {row.bank_name} {row.bank_branch}
                    </div>
                  )}
                </div>
              ),
            },
            {
              title: '状态',
              dataIndex: 'status',
              width: 130,
              render: (v: string) => {
                const conf = STATUS_CONFIG[v] || { label: v, color: 'default' }
                return <Tag color={conf.color}>{conf.label}</Tag>
              },
            },
            {
              title: '审核 / 付款备注',
              width: 180,
              render: (_: unknown, row: SiteWithdrawal) => (
                <div>
                  {row.review_remark && (
                    <div style={{ fontSize: 12 }}>
                      <span style={{ color: '#888' }}>审核: </span>{row.review_remark}
                    </div>
                  )}
                  {row.payment_remark && (
                    <div style={{ fontSize: 12 }}>
                      <span style={{ color: '#888' }}>打款: </span>{row.payment_remark}
                    </div>
                  )}
                  {row.payment_proof_url && (
                    <div style={{ marginTop: 4 }}>
                      <Image src={row.payment_proof_url} width={40} height={40} style={{ objectFit: 'cover', borderRadius: 4 }} />
                    </div>
                  )}
                  {!row.review_remark && !row.payment_remark && !row.payment_proof_url && '-'}
                </div>
              ),
            },
            {
              title: '申请时间',
              dataIndex: 'created_at',
              width: 160,
              render: (v: string) => (
                <span style={{ fontSize: 12, color: '#666', whiteSpace: 'nowrap' }}>
                  {v ? new Date(v).toLocaleString('zh-CN', { hour12: false }) : '-'}
                </span>
              ),
            },
            {
              title: '打款时间',
              dataIndex: 'paid_at',
              width: 160,
              render: (v: string | undefined) => (
                <span style={{ fontSize: 12, color: v ? '#52c41a' : '#999', whiteSpace: 'nowrap' }}>
                  {v ? new Date(v).toLocaleString('zh-CN', { hour12: false }) : '待打款'}
                </span>
              ),
            },
          ]}
        />
      </Card>

      <Modal
        title="申请提现"
        open={modalVisible}
        onCancel={() => setModalVisible(false)}
        footer={null}
        destroyOnClose
      >
        <Form form={form} layout="vertical" onFinish={handleApplyWithdrawal}>
          <Form.Item label="提现站点">
            <Input disabled value={`${selectedSite?.site_name ?? ''} (${selectedSite?.site_code ?? ''})`} />
          </Form.Item>
          <Form.Item
            label={`提现金额 (当前可提现: ${formatMoney(wallet?.available_balance_cent)})`}
            name="amount"
            rules={[{ required: true, message: '请输入提现金额' }]}
          >
            <InputNumber
              style={{ width: '100%' }}
              min={0.01}
              max={((wallet?.available_balance_cent ?? 0) / 100)}
              precision={2}
              placeholder="请输入提现金额（元）"
              addonAfter={
                <Button
                  type="link"
                  size="small"
                  onClick={() => {
                    form.setFieldsValue({
                      amount: (wallet?.available_balance_cent ?? 0) / 100,
                    })
                  }}
                >
                  全部提现
                </Button>
              }
            />
          </Form.Item>

          <Form.Item label="收款方式" name="account_type" rules={[{ required: true }]}>
            <Radio.Group>
              <Radio value="alipay">支付宝</Radio>
              <Radio value="bank">银行卡</Radio>
            </Radio.Group>
          </Form.Item>

          <Form.Item label="收款人姓名" name="account_name" rules={[{ required: true, message: '请输入收款人姓名' }]}>
            <Input placeholder="真实姓名" />
          </Form.Item>

          <Form.Item label="收款账号" name="account_no" rules={[{ required: true, message: '请输入收款账号' }]}>
            <Input placeholder="支付宝账号 / 银行卡号" />
          </Form.Item>

          <Form.Item
            noStyle
            shouldUpdate={(prev, cur) => prev.account_type !== cur.account_type}
          >
            {({ getFieldValue }) =>
              getFieldValue('account_type') === 'bank' ? (
                <>
                  <Form.Item label="开户银行" name="bank_name" rules={[{ required: true, message: '请输入开户行' }]}>
                    <Input placeholder="例如：招商银行" />
                  </Form.Item>
                  <Form.Item label="支行名称" name="bank_branch">
                    <Input placeholder="例如：上海徐家汇支行（可选）" />
                  </Form.Item>
                </>
              ) : null
            }
          </Form.Item>

          <Form.Item style={{ marginBottom: 0, textAlign: 'right' }}>
            <Space>
              <Button onClick={() => setModalVisible(false)}>取消</Button>
              <Button type="primary" htmlType="submit" loading={submitting}>
                提交提现申请
              </Button>
            </Space>
          </Form.Item>
        </Form>
      </Modal>
    </Space>
  )
}