import {
  CloseCircleOutlined,
  ReloadOutlined,
  SearchOutlined,
  SwapOutlined,
  UserSwitchOutlined,
} from '@ant-design/icons'
import { Alert, App, Button, Card, DatePicker, Form, Input, Select, Space, Table, Typography } from 'antd'
import type { TableColumnsType } from 'antd'
import { useQuery } from '@tanstack/react-query'
import dayjs from 'dayjs'
import { useMemo, useState } from 'react'
import { useNavigate, useSearchParams } from 'react-router'

import PageHeader from '@/components/admin/PageHeader'
import StatusTag from '@/components/admin/StatusTag'
import {
  closeAdminTask,
  fetchAdminTasks,
  markAdminTaskManualReview,
  rebindAdminTaskKuaishouCloudRole,
  retryAdminTask,
} from '@/services/admin'
import type { AdminTaskActionResponse, AdminTaskListItem } from '@/types/admin'
import { hasAdminRole } from '@/utils/admin-auth'
import { adminTaskStatusOptions } from '@/utils/admin-options'
import { formatAdminDateTime } from '@/utils/admin-time'

type TaskFilterForm = {
  status?: string
  platformOrderId?: string
  taskNo?: string
  skuCode?: string
  roleId?: string
  dateRange?: unknown
}

type TaskListAction = 'retry' | 'rebind_role' | 'manual_review' | 'close'

export default function AdminTasksPage() {
  const navigate = useNavigate()
  const { message, modal } = App.useApp()
  const [searchParams, setSearchParams] = useSearchParams()
  const [actionLoadingId, setActionLoadingId] = useState<number | null>(null)
  const [lastClaimUrl, setLastClaimUrl] = useState('')
  const page = Number(searchParams.get('page') || 1) || 1
  const pageSize = Number(searchParams.get('pageSize') || 20) || 20
  const canManageTaskLifecycle = hasAdminRole('operator')
  const canCloseTasks = hasAdminRole('support')
  const filters = {
    status: searchParams.get('status') || '',
    platformOrderId: searchParams.get('platformOrderId') || '',
    taskNo: searchParams.get('taskNo') || '',
    skuCode: searchParams.get('skuCode') || '',
    roleId: searchParams.get('roleId') || '',
    dateFrom: searchParams.get('dateFrom') || '',
    dateTo: searchParams.get('dateTo') || '',
  }

  const queryParams = useMemo(
    () => ({ page, pageSize, ...filters }),
    [
      filters.dateFrom,
      filters.dateTo,
      filters.platformOrderId,
      filters.roleId,
      filters.skuCode,
      filters.status,
      filters.taskNo,
      page,
      pageSize,
    ],
  )
  const query = useQuery({
    queryKey: ['admin-tasks', queryParams],
    queryFn: () => fetchAdminTasks(queryParams),
  })
  const data = query.data?.data

  const columns: TableColumnsType<AdminTaskListItem> = [
    {
      title: '任务 / 订单',
      minWidth: 230,
      render: (_, row) => (
        <div className="cell-stack">
          <Typography.Link onClick={() => navigate(`/admin/tasks/${row.taskId}`)}>
            {row.taskNo}
          </Typography.Link>
          <span className="muted">{row.platformOrderId}</span>
        </div>
      ),
    },
    {
      title: '商品',
      minWidth: 210,
      render: (_, row) => (
        <div className="cell-stack">
          <span>{row.skuName || '-'}</span>
          <span className="muted">{row.skuCode || row.executorKey}</span>
        </div>
      ),
    },
    {
      title: '状态',
      minWidth: 250,
      render: (_, row) => (
        <Space size={[0, 6]} wrap>
          <StatusTag value={row.status} kind="task" />
          <StatusTag value={row.resourceStatus} kind="resource" />
          <StatusTag value={row.customerStatus} kind="customer" />
        </Space>
      ),
    },
    {
      title: '角色',
      minWidth: 180,
      render: (_, row) => (
        <div className="cell-stack">
          <span>{row.roleName || '-'}</span>
          <span className="muted">{row.roleId || row.loginType || '-'}</span>
        </div>
      ),
    },
    {
      title: '时间',
      minWidth: 220,
      render: (_, row) => (
        <div className="cell-stack">
          <span>{formatAdminDateTime(row.updatedAt)}</span>
          <span className="muted">创建 {formatAdminDateTime(row.createdAt)}</span>
        </div>
      ),
    },
    {
      title: '异常 / 操作',
      minWidth: 260,
      fixed: 'right',
      render: (_, row) => {
        const rowLoading = actionLoadingId === row.taskId
        const actionRunning = actionLoadingId !== null
        const canRetry =
          canManageTaskLifecycle &&
          row.executorKey !== 'manual_dispatch' &&
          ['retry_pending', 'manual_review'].includes(row.status)
        const canRebind = canRebindListTask(row, canManageTaskLifecycle)
        const canClose = canCloseTasks && !['redeemed', 'closed'].includes(row.status)
        const hasActions = canManageTaskLifecycle || canRebind || canClose

        return (
          <div className="cell-stack">
            <Typography.Text type={row.lastError ? 'danger' : 'secondary'} ellipsis>
              {row.lastError || '当前无异常'}
            </Typography.Text>
            {hasActions ? (
              <Space size={[6, 6]} wrap>
                {canManageTaskLifecycle ? (
                  <Button
                    size="small"
                    danger
                    ghost
                    icon={<ReloadOutlined />}
                    disabled={actionRunning || !canRetry}
                    loading={rowLoading}
                    onClick={() => handleActionCommand('retry', row)}
                  >
                    重试
                  </Button>
                ) : null}
                {canRebind ? (
                  <Button
                    size="small"
                    icon={<SwapOutlined />}
                    disabled={actionRunning}
                    loading={rowLoading}
                    onClick={() => handleActionCommand('rebind_role', row)}
                  >
                    换绑
                  </Button>
                ) : null}
                {canManageTaskLifecycle ? (
                  <Button
                    size="small"
                    icon={<UserSwitchOutlined />}
                    disabled={actionRunning}
                    loading={rowLoading}
                    onClick={() => handleActionCommand('manual_review', row)}
                  >
                    转人工
                  </Button>
                ) : null}
                {canClose ? (
                  <Button
                    size="small"
                    danger
                    icon={<CloseCircleOutlined />}
                    disabled={actionRunning}
                    loading={rowLoading}
                    onClick={() => handleActionCommand('close', row)}
                  >
                    关闭
                  </Button>
                ) : null}
              </Space>
            ) : null}
          </div>
        )
      },
    },
  ]

  function handleActionCommand(actionKey: TaskListAction, item: AdminTaskListItem) {
    const actionConfig = resolveTaskListAction(actionKey, item)

    modal.confirm({
      title: '确认操作',
      content: actionConfig.confirmText,
      okText: '继续执行',
      cancelText: '取消',
      centered: true,
      onOk: async () => {
        setActionLoadingId(item.taskId)
        try {
          const response = await actionConfig.action()
          if (response.data.claimUrl) {
            setLastClaimUrl(response.data.claimUrl)
          }
          message.success(actionConfig.successMessage)
          await query.refetch()
        } catch (error) {
          message.error(error instanceof Error ? error.message : '操作失败')
        } finally {
          setActionLoadingId(null)
        }
      },
    })
  }

  function resolveTaskListAction(actionKey: TaskListAction, item: AdminTaskListItem): {
    action: () => Promise<{ data: AdminTaskActionResponse }>
    confirmText: string
    successMessage: string
  } {
    if (actionKey === 'retry') {
      return {
        action: () => retryAdminTask(item.taskId),
        confirmText: `确认重试任务 ${item.taskNo} 吗？`,
        successMessage: '任务已重试',
      }
    }

    if (actionKey === 'rebind_role') {
      return {
        action: () => rebindAdminTaskKuaishouCloudRole(item.taskId),
        confirmText: `确认为任务 ${item.taskNo} 换绑角色吗？当前虚拟号会退还，并生成新的绑定二维码。`,
        successMessage: '角色换绑资源已准备完成',
      }
    }

    if (actionKey === 'manual_review') {
      return {
        action: () => markAdminTaskManualReview(item.taskId),
        confirmText: `确认将任务 ${item.taskNo} 转为人工处理吗？`,
        successMessage: '任务已转人工处理',
      }
    }

    return {
      action: () => closeAdminTask(item.taskId),
      confirmText: `确认关闭任务 ${item.taskNo} 吗？关闭后不会自动继续推进。`,
      successMessage: '任务已关闭',
    }
  }

  function applyFilters(values: TaskFilterForm) {
    const { dateRange, ...restValues } = values
    const [dateFrom, dateTo] = Array.isArray(dateRange)
      ? dateRange.map((item: { format?: (pattern: string) => string }) =>
          item?.format ? item.format('YYYY-MM-DD') : '',
        )
      : ['', '']

    setSearchParams(
      cleanParams({
        ...restValues,
        dateFrom,
        dateTo,
        page: 1,
        pageSize,
      }),
    )
  }

  function resetFilters() {
    setSearchParams(cleanParams({ page: 1, pageSize }))
  }

  return (
    <section className="page-stack">
      <PageHeader title="任务" description="跟踪履约任务状态、客户步骤和资源准备进度。" />

      <Card>
        <Form<TaskFilterForm>
          layout="inline"
          initialValues={{
            ...filters,
            dateRange:
              filters.dateFrom && filters.dateTo
                ? [dayjs(filters.dateFrom), dayjs(filters.dateTo)]
                : undefined,
          }}
          onFinish={applyFilters}
          className="filter-form"
        >
          <Form.Item name="status">
            <Select
              allowClear
              placeholder="任务状态"
              options={adminTaskStatusOptions}
              style={{ minWidth: 170 }}
            />
          </Form.Item>
          <Form.Item name="platformOrderId">
            <Input allowClear placeholder="平台订单号" />
          </Form.Item>
          <Form.Item name="taskNo">
            <Input allowClear placeholder="任务号" />
          </Form.Item>
          <Form.Item name="roleId">
            <Input allowClear placeholder="角色 ID" />
          </Form.Item>
          <Form.Item name="skuCode">
            <Input allowClear placeholder="商品名 / SKU" />
          </Form.Item>
          <Form.Item name="dateRange">
            <DatePicker.RangePicker />
          </Form.Item>
          <Form.Item>
            <Space>
              <Button type="primary" icon={<SearchOutlined />} htmlType="submit">
                查询
              </Button>
              <Button icon={<ReloadOutlined />} onClick={resetFilters}>
                重置
              </Button>
            </Space>
          </Form.Item>
        </Form>
      </Card>

      {lastClaimUrl ? (
        <Alert
          type="info"
          showIcon
          message="最近可用领取链接"
          description={
            <Typography.Text copyable={{ text: lastClaimUrl }}>{lastClaimUrl}</Typography.Text>
          }
        />
      ) : null}

      <Card>
        <Table<AdminTaskListItem>
          rowKey="taskId"
          loading={query.isLoading || query.isFetching}
          columns={columns}
          dataSource={data?.items || []}
          scroll={{ x: 1240 }}
          pagination={{
            current: data?.pagination.page || page,
            pageSize: data?.pagination.pageSize || pageSize,
            total: data?.pagination.total || 0,
            showSizeChanger: true,
            showTotal: (total) => `共 ${total} 条`,
            onChange: (nextPage, nextPageSize) => {
              setSearchParams(cleanParams({ ...filters, page: nextPage, pageSize: nextPageSize }))
            },
          }}
        />
      </Card>
    </section>
  )
}

function canRebindListTask(item: AdminTaskListItem, canManageTaskLifecycle: boolean) {
  return (
    canManageTaskLifecycle &&
    item.executorKey === 'kuaishou_ct_assisted' &&
    ['waiting_binding', 'role_confirmed', 'manual_review', 'retry_pending'].includes(item.status)
  )
}

function cleanParams(params: Record<string, unknown>) {
  const next = new URLSearchParams()
  Object.entries(params).forEach(([key, value]) => {
    const normalized = String(value ?? '').trim()
    if (normalized) {
      next.set(key, normalized)
    }
  })
  return next
}