import { Button, Card, Col, Form, Row, Select, Space, Table, Tag, Toast } from '@douyinfe/semi-ui';
import { IconCopy } from '@douyinfe/semi-icons';
import { useEffect, useState } from 'react';
import { api } from '../api/client';
import type { OpsHealth, QualitySummary, QualityIssueRow } from '../api/types';
import { PageHeader } from '../components/PageHeader';
import { qualityIssueLabel, qualityIssueOptions, qualityProtocolLabel, qualityProtocolOptions } from '../domain/qualityIssue';
import { qualityIssueVehicleLookup } from '../domain/vehicleLookup';

const statusColor: Record<string, 'green' | 'orange' | 'red' | 'grey'> = {
  ok: 'green',
  warning: 'orange',
  error: 'red'
};

function formatLag(value?: number | null) {
  return value == null ? '未接入' : value.toLocaleString();
}

function storageReadStatus(health: OpsHealth | null) {
  if (!health) return 'pending';
  return health.tdengineWritable && health.mysqlWritable ? 'ok' : 'error';
}

function formatRequestTimeout(health: OpsHealth | null) {
  const value = health?.runtime?.requestTimeoutMs;
  return value == null || value <= 0 ? '未限制' : `${value.toLocaleString()} ms`;
}

const emptySummary: QualitySummary = {
  issueVehicleCount: 0,
  issueRecordCount: 0,
  errorCount: 0,
  warningCount: 0,
  protocols: [],
  issueTypes: []
};

const alertRuleTemplates = [
  {
    issueType: 'NO_SOURCE',
    level: 'P0',
    owner: '平台接入',
    trigger: '绑定车辆连续无 GB32960、JT808、MQTT 来源证据',
    notify: '立即通知接入运维，30 分钟未恢复升级给业务责任人',
    sla: '30 分钟确认'
  },
  {
    issueType: 'VIN_MISSING',
    level: 'P0',
    owner: '车辆档案',
    trigger: '来源有数据但无法归并到 VIN',
    notify: '通知档案维护人补齐车牌、手机号和 VIN 映射',
    sla: '2 小时修复'
  },
  {
    issueType: 'LINK_GAP',
    level: 'P1',
    owner: '链路运维',
    trigger: '车辆或平台来源上报间断、Redis 在线状态过期',
    notify: '通知平台转发和网关值班人，持续异常进入日报',
    sla: '1 小时恢复'
  },
  {
    issueType: 'FIELD_MISSING',
    level: 'P1',
    owner: '协议解析',
    trigger: '核心字段缺失导致定位、里程或统计不可用',
    notify: '通知解析负责人核对字段映射和 RAW 样本',
    sla: '当日闭环'
  }
];

const notificationPolicies = [
  {
    name: 'P0 实时中断',
    target: '接入运维 + 业务责任人',
    channel: '站内告警 / 邮件 / 企业微信',
    condition: '无来源、VIN 缺失、存储不可写'
  },
  {
    name: 'P1 数据质量',
    target: '协议解析 + 数据治理',
    channel: '站内告警 / 每日汇总邮件',
    condition: '字段缺失、链路间断、容量风险'
  },
  {
    name: 'P2 趋势关注',
    target: '数智中心',
    channel: '周报 / 趋势看板',
    condition: '单源车辆、档案缺项、来源覆盖下降'
  }
];

type AlertRuleRow = {
  issueType: string;
  level: string;
  owner: string;
  trigger: string;
  notify: string;
  sla: string;
  count: number;
};

function qualityParams(values: Record<string, string>) {
  const params = new URLSearchParams();
  if (values?.keyword) params.set('keyword', values.keyword);
  if (values?.protocol) params.set('protocol', values.protocol);
  if (values?.issueType) params.set('issueType', values.issueType);
  return params;
}

function qualityShareURL() {
  return `${window.location.origin}${window.location.pathname}${window.location.hash}`;
}

function qualityActionRecommendation(row: QualityIssueRow) {
  if (row.issueType === 'NO_SOURCE') {
    return {
      label: '确认平台转发',
      color: 'orange' as const,
      detail: '车辆已绑定但没有任何来源证据，先确认平台转发、端口和订阅。'
    };
  }
  if (row.issueType === 'VIN_MISSING' || !row.vin?.trim()) {
    return {
      label: '维护身份绑定',
      color: 'red' as const,
      detail: '数据已有来源但无法归并到 VIN，优先用车牌/手机号补齐绑定。'
    };
  }
  if (row.issueType === 'LINK_GAP') {
    return {
      label: '排查来源链路',
      color: 'orange' as const,
      detail: '来源存在上报间断，优先检查平台转发、网络和消费延迟。'
    };
  }
  if (row.issueType === 'FIELD_MISSING') {
    return {
      label: '核对解析字段',
      color: 'orange' as const,
      detail: '字段缺失会影响统计和展示，优先核对解析映射和原始 RAW。'
    };
  }
  return {
    label: '查看车辆服务',
    color: 'blue' as const,
    detail: '进入车辆服务详情，结合来源证据继续排查。'
  };
}

function issueCount(summary: QualitySummary, issueType: string) {
  return summary.issueTypes.find((item) => item.name === issueType)?.count ?? 0;
}

function alertRuleRows(summary: QualitySummary, health: OpsHealth | null): AlertRuleRow[] {
  const storageWritable = health == null || (health.tdengineWritable && health.mysqlWritable);
  const capacityCount = health?.capacityFindings?.length ?? 0;
  const rows = alertRuleTemplates.map((item) => ({
    ...item,
    count: issueCount(summary, item.issueType)
  }));
  rows.push({
    issueType: 'CAPACITY_RISK',
    level: storageWritable && capacityCount === 0 ? 'P2' : 'P0',
    owner: '基础设施',
    trigger: 'Kafka Lag、连接容量、Redis 在线 Key 或存储读写异常',
    notify: storageWritable ? '容量风险进入运维日报，超过阈值升级' : '立即通知基础设施值班人处理存储不可写',
    sla: storageWritable ? '当日评估' : '15 分钟恢复',
    count: capacityCount + (storageWritable ? 0 : 1)
  });
  return rows;
}

function ruleStatusColor(count: number, level: string): 'green' | 'orange' | 'red' | 'grey' {
  if (count <= 0) return 'green';
  if (level === 'P0') return 'red';
  if (level === 'P1') return 'orange';
  return 'grey';
}

async function copyText(value: string, label: string) {
  const text = value.trim();
  if (!text) {
    Toast.warning(`${label}为空`);
    return;
  }
  try {
    await navigator.clipboard.writeText(text);
    Toast.success(`已复制${label}`);
  } catch {
    Toast.error(`复制${label}失败`);
  }
}

async function copyQualityShareURL() {
  await copyText(qualityShareURL(), '筛选链接');
}

export function Quality({
  onOpenVehicle,
  onHealthLoaded,
  onFiltersChange,
  initialFilters = {}
}: {
  onOpenVehicle: (vin: string, protocol?: string) => void;
  onHealthLoaded?: (health: OpsHealth) => void;
  onFiltersChange?: (filters: Record<string, string>) => void;
  initialFilters?: Record<string, string>;
}) {
  const [issues, setIssues] = useState<QualityIssueRow[]>([]);
  const [summary, setSummary] = useState<QualitySummary>(emptySummary);
  const [health, setHealth] = useState<OpsHealth | null>(null);
  const [loadingIssues, setLoadingIssues] = useState(true);
  const [loadingSummary, setLoadingSummary] = useState(true);
  const [loadingHealth, setLoadingHealth] = useState(true);
  const [filters, setFilters] = useState<Record<string, string>>(initialFilters);
  const [pagination, setPagination] = useState({ currentPage: 1, pageSize: 20, total: 0 });
  const primaryIssueType = summary.issueTypes[0]?.name;
  const rules = alertRuleRows(summary, health);
  const activeRuleCount = rules.filter((item) => item.count > 0).length;
  const p0RuleCount = rules.filter((item) => item.count > 0 && item.level === 'P0').length;

  const loadIssues = (values: Record<string, string> = filters, page = pagination.currentPage, pageSize = pagination.pageSize) => {
    setLoadingIssues(true);
    const params = qualityParams(values);
    params.set('limit', String(pageSize));
    params.set('offset', String((page - 1) * pageSize));
    api.qualityIssues(params)
      .then((nextPage) => {
        setIssues(nextPage.items);
        setPagination({ currentPage: page, pageSize, total: nextPage.total });
      })
      .catch((error: Error) => Toast.error(error.message))
      .finally(() => setLoadingIssues(false));
  };

  const loadSummary = (values: Record<string, string> = filters) => {
    setLoadingSummary(true);
    api.qualitySummary(qualityParams(values))
      .then(setSummary)
      .catch((error: Error) => Toast.error(error.message))
      .finally(() => setLoadingSummary(false));
  };

  const loadHealth = () => {
    setLoadingHealth(true);
    api.opsHealth()
      .then((nextHealth) => {
        setHealth(nextHealth);
        onHealthLoaded?.(nextHealth);
      })
      .catch((error: Error) => Toast.error(error.message))
      .finally(() => setLoadingHealth(false));
  };

  useEffect(() => {
    setFilters(initialFilters);
    loadSummary(initialFilters);
    loadIssues(initialFilters, 1, pagination.pageSize);
    loadHealth();
  }, [JSON.stringify(initialFilters)]);

  const applyFilters = (nextFilters: Record<string, string>) => {
    setFilters(nextFilters);
    onFiltersChange?.(nextFilters);
    loadSummary(nextFilters);
    loadIssues(nextFilters, 1, pagination.pageSize);
  };

  const drillPrimaryIssue = () => {
    if (!primaryIssueType) {
      return;
    }
    applyFilters({ ...filters, issueType: primaryIssueType });
  };
  const drillProtocol = (protocol: string) => {
    applyFilters({ ...filters, protocol });
  };
  const drillIssueType = (issueType: string) => {
    applyFilters({ ...filters, issueType });
  };
  const filterSummary = [
    filters.keyword ? `关键词：${filters.keyword}` : '',
    filters.protocol ? `数据来源：${qualityProtocolLabel(filters.protocol)}` : '',
    filters.issueType ? `问题类型：${qualityIssueLabel(filters.issueType)}` : ''
  ].filter(Boolean);

  return (
    <div className="vp-page">
      <PageHeader title="告警通知" description="围绕车辆服务沉淀断链、VIN 缺失、字段缺失和链路健康告警，并形成通知闭环" />
      <div className="vp-kpi-grid">
        {[
          { label: '问题车辆', value: summary.issueVehicleCount.toLocaleString() },
          { label: '问题记录', value: summary.issueRecordCount.toLocaleString() },
          { label: '错误 / 警告', value: `${summary.errorCount}/${summary.warningCount}` },
          {
            label: '主要问题',
            value: primaryIssueType ? `${qualityIssueLabel(primaryIssueType)} ${summary.issueTypes[0].count}` : '-',
            onClick: primaryIssueType ? drillPrimaryIssue : undefined
          }
        ].map((item) => (
          <Card key={item.label} bordered loading={loadingSummary}>
            {item.onClick ? (
              <button
                className="vp-result-summary-button"
                type="button"
                aria-label={`${item.label} ${item.value}`}
                onClick={item.onClick}
              >
                <div className="vp-kpi-value">{item.value}</div>
                <div className="vp-kpi-label">{item.label}</div>
              </button>
            ) : (
              <>
                <div className="vp-kpi-value">{item.value}</div>
                <div className="vp-kpi-label">{item.label}</div>
              </>
            )}
          </Card>
        ))}
      </div>
      <Row gutter={16}>
        <Col span={6}><Card bordered title="Kafka Lag">{formatLag(health?.kafkaLag)}</Card></Col>
        <Col span={6}><Card bordered title="活跃连接">{formatLag(health?.activeConnections)}</Card></Col>
        <Col span={6}><Card bordered title="Redis 在线 Key">{formatLag(health?.redisOnlineKeys)}</Card></Col>
        <Col span={6}>
          <Card bordered title="存储读取">
            <Tag color={statusColor[storageReadStatus(health)] ?? 'grey'}>
              {storageReadStatus(health) === 'pending' ? '检测中' : storageReadStatus(health) === 'ok' ? '正常' : '异常'}
            </Tag>
          </Card>
        </Col>
      </Row>
      <Card bordered title="告警通知闭环" style={{ marginTop: 16 }}>
        <div className="vp-alert-flow">
          {[
            { label: '事件触发', value: `${activeRuleCount} 类活跃`, detail: '断链、无来源、VIN 缺失、字段缺失和容量异常进入告警池。' },
            { label: '分级通知', value: `${p0RuleCount} 类 P0`, detail: '按错误、警告、关注分层推送给平台、运维和业务责任人。' },
            { label: '处置回执', value: `${summary.issueVehicleCount.toLocaleString()} 辆车`, detail: '告警需要关联车辆服务、来源证据和处理结论，形成可追踪闭环。' }
          ].map((item) => (
            <div key={item.label} className="vp-alert-flow-item">
              <Tag color="blue">{item.label}</Tag>
              <div className="vp-alert-flow-value">{item.value}</div>
              <div>{item.detail}</div>
            </div>
          ))}
        </div>
      </Card>
      <div className="vp-alert-ops-grid">
        <Card bordered title="告警触发规则">
          <Table<AlertRuleRow>
            pagination={false}
            dataSource={rules}
            rowKey="issueType"
            columns={[
              { title: '规则', render: (_: unknown, row: AlertRuleRow) => row.issueType === 'CAPACITY_RISK' ? '容量与存储风险' : qualityIssueLabel(row.issueType) },
              { title: '级别', width: 90, render: (_: unknown, row: AlertRuleRow) => <Tag color={ruleStatusColor(row.count, row.level)}>{row.level}</Tag> },
              { title: '当前命中', width: 110, render: (_: unknown, row: AlertRuleRow) => row.count.toLocaleString() },
              { title: '触发条件', dataIndex: 'trigger' },
              { title: 'SLA', dataIndex: 'sla', width: 110 }
            ]}
          />
        </Card>
        <Card bordered title="通知策略">
          <div className="vp-notification-policy-list">
            {notificationPolicies.map((item) => (
              <div key={item.name} className="vp-notification-policy">
                <div>
                  <Space>
                    <Tag color={item.name.startsWith('P0') ? 'red' : item.name.startsWith('P1') ? 'orange' : 'grey'}>{item.name}</Tag>
                    <strong>{item.target}</strong>
                  </Space>
                  <div className="vp-alert-policy-detail">{item.condition}</div>
                </div>
                <Tag color="blue">{item.channel}</Tag>
              </div>
            ))}
          </div>
        </Card>
      </div>
      {health?.capacityFindings?.length ? (
        <Card bordered title="容量检查发现" style={{ marginTop: 16 }}>
          <Space wrap>
            {health.capacityFindings.map((item) => (
              <Tag key={item} color="orange">{item}</Tag>
            ))}
          </Space>
        </Card>
      ) : null}
      {filterSummary.length > 0 ? (
        <Card bordered title="当前筛选" style={{ marginTop: 16 }}>
          <Space wrap>
            {filterSummary.map((item) => (
              <Tag key={item} color="blue">{item}</Tag>
            ))}
            <Button size="small" onClick={() => applyFilters({})}>清空筛选</Button>
          </Space>
        </Card>
      ) : null}
      <Card bordered title="问题来源分布" loading={loadingSummary} style={{ marginTop: 16 }}>
        <Table
          pagination={false}
          dataSource={summary.protocols}
          rowKey="name"
          columns={[
            { title: '数据来源', render: (_: unknown, row: { name: string }) => qualityProtocolLabel(row.name) },
            { title: '问题数', dataIndex: 'count', width: 120 },
            {
              title: '操作',
              width: 140,
              render: (_: unknown, row: { name: string }) => (
                <Button size="small" onClick={() => drillProtocol(row.name)}>查看 {qualityProtocolLabel(row.name)} 质量问题</Button>
              )
            }
          ]}
        />
      </Card>
      <Card bordered title="问题类型分布" loading={loadingSummary} style={{ marginTop: 16 }}>
        <Table
          pagination={false}
          dataSource={summary.issueTypes}
          rowKey="name"
          columns={[
            { title: '问题类型', render: (_: unknown, row: { name: string }) => qualityIssueLabel(row.name) },
            { title: '问题数', dataIndex: 'count', width: 120 },
            {
              title: '操作',
              width: 160,
              render: (_: unknown, row: { name: string }) => (
                <Button size="small" onClick={() => drillIssueType(row.name)}>查看 {qualityIssueLabel(row.name)}质量问题</Button>
              )
            }
          ]}
        />
      </Card>
      <Card bordered title="质量问题" style={{ marginTop: 16 }}>
        <Form key={JSON.stringify(filters)} initValues={filters} layout="horizontal" onSubmit={(values) => {
          const nextFilters = values as Record<string, string>;
          applyFilters(nextFilters);
        }} style={{ marginBottom: 12 }}>
          <Form.Input field="keyword" label="关键词" placeholder="VIN / 车牌 / 手机号 / 来源地址" style={{ width: 260 }} />
          <Form.Select field="protocol" label="数据来源" placeholder="全部来源" style={{ width: 160 }}>
            {qualityProtocolOptions.map((item) => (
              <Select.Option key={item.value} value={item.value}>{item.label}</Select.Option>
            ))}
          </Form.Select>
          <Form.Select field="issueType" label="问题类型" placeholder="全部问题" style={{ width: 160 }}>
            {qualityIssueOptions.map((item) => (
              <Select.Option key={item.value} value={item.value}>{item.label}</Select.Option>
            ))}
          </Form.Select>
          <Space>
            <Button htmlType="submit" theme="solid" type="primary">筛选</Button>
            <Button icon={<IconCopy />} onClick={copyQualityShareURL}>复制筛选链接</Button>
            <Button onClick={() => {
              applyFilters({});
            }}>重置</Button>
          </Space>
        </Form>
        <Table
          loading={loadingIssues}
          rowKey={(row?: QualityIssueRow) => `${row?.protocol ?? ''}-${row?.issueType ?? ''}-${row?.lastSeen ?? ''}-${row?.detail ?? ''}`}
          dataSource={issues}
          pagination={{
            currentPage: pagination.currentPage,
            pageSize: pagination.pageSize,
            total: pagination.total,
            showSizeChanger: true,
            onPageChange: (page) => loadIssues(filters, page, pagination.pageSize),
            onPageSizeChange: (pageSize) => loadIssues(filters, 1, pageSize)
          }}
          columns={[
            { title: 'VIN', dataIndex: 'vin' },
            { title: '车牌', dataIndex: 'plate' },
            { title: '手机号', dataIndex: 'phone' },
            { title: '来源地址', dataIndex: 'sourceEndpoint' },
            { title: '数据来源', render: (_: unknown, row: QualityIssueRow) => qualityProtocolLabel(row.protocol) },
            { title: '问题', render: (_: unknown, row: QualityIssueRow) => qualityIssueLabel(row.issueType) },
            { title: '级别', render: (_: unknown, row: QualityIssueRow) => <Tag color={row.severity === 'error' ? 'red' : 'orange'}>{row.severity}</Tag> },
            { title: '最后时间', dataIndex: 'lastSeen' },
            { title: '说明', dataIndex: 'detail' },
            {
              title: '处置建议',
              width: 260,
              render: (_: unknown, row: QualityIssueRow) => {
                const action = qualityActionRecommendation(row);
                return (
                  <div>
                    <Tag color={action.color}>{action.label}</Tag>
                    <div style={{ marginTop: 6 }}>{action.detail}</div>
                  </div>
                );
              }
            },
            {
              title: '操作',
              width: 250,
              render: (_: unknown, row: QualityIssueRow) => {
                const lookup = qualityIssueVehicleLookup(row);
                return (
                  <Space spacing={4}>
                    <Button size="small" icon={<IconCopy />} onClick={() => copyText(row.phone, '手机号')}>手机号</Button>
                    <Button size="small" icon={<IconCopy />} onClick={() => copyText(row.sourceEndpoint, '来源')}>来源</Button>
                    <Button size="small" disabled={!lookup.key} onClick={() => onOpenVehicle(lookup.key, row.protocol)}>
                      {lookup.label}
                    </Button>
                  </Space>
                );
              }
            }
          ]}
        />
      </Card>
      <Card
        bordered
        title={<Space><span>链路健康</span><Button size="small" loading={loadingHealth} onClick={loadHealth}>刷新链路</Button></Space>}
        style={{ marginTop: 16 }}
      >
        <Table
          loading={loadingHealth}
          dataSource={health?.linkHealth ?? []}
          pagination={false}
          columns={[
            { title: '链路', dataIndex: 'name' },
            {
              title: '状态',
              render: (_: unknown, row: { status: string }) => (
                <Tag color={statusColor[row.status] ?? 'grey'}>{row.status}</Tag>
              )
            },
            { title: '说明', dataIndex: 'detail' }
          ]}
        />
      </Card>
    </div>
  );
}