"use client"

import type React from "react"
import {useMemo, useState} from "react"
import dayjs from "dayjs"
import {Button, Card, Col, Flex, Form, Input, Popconfirm, Row, Select, Space, Table, Tag} from "antd"
import {BadgeAlertIcon as Alert, FileText} from "lucide-react"
import globalMessage from "@/app/_modules/globalMessage";

type Level = "红色" | "橙色" | "黄色" | "蓝色"
type WarnType = "燃气" | "供水" | "电力" | "交通" | "综合"
type MatterItemStatus = "启用" | "禁用" | "作废"

export type MatterItem = {
  id: string
  code: string
  name: string
  type: WarnType
  level: Level
  status: MatterItemStatus
  createdAt: string
  updatedAt: string
}

export type ReasonEntry = {
  id: string
  type: WarnType
  level: Level
  reason: string
  createdAt: string
}

export type MatterManagementProps = {
  matters: MatterItem[]
  setMatters: React.Dispatch<React.SetStateAction<MatterItem[]>>
  reasons: ReasonEntry[]
  setReasons: React.Dispatch<React.SetStateAction<ReasonEntry[]>>
}

const LEVELS: Level[] = ["红色", "橙色", "黄色", "蓝色"]
const TYPES: WarnType[] = ["燃气", "供水", "电力", "交通", "综合"]

function levelColor(lvl: Level) {
  switch (lvl) {
    case "红色":
      return "red"
    case "橙色":
      return "orange"
    case "黄色":
      return "gold"
    case "蓝色":
      return "blue"
    default:
      return "default"
  }
}

function genId(prefix = "id") {
  return `${prefix}_${Math.random().toString(36).slice(2, 10)}`
}

function autoCode(type: WarnType, level: Level, seq: number) {
  const date = dayjs().format("YYYYMMDD")
  const t = { 燃气: "GAS", 供水: "WTR", 电力: "ELE", 交通: "TRF", 综合: "COM" }[type]
  const l = { 红色: "R", 橙色: "O", 黄色: "Y", 蓝色: "B" }[level]
  return `YW-${t}-${l}-${date}-${seq.toString().padStart(3, "0")}`
}

export default function MatterManagement({ matters, setMatters, reasons, setReasons }: MatterManagementProps) {
  const [form] = Form.useForm<{ name: string; type: WarnType; level: Level }>()
  const [seq, setSeq] = useState(matters.length + 1)
  const type = Form.useWatch("type", form)
  const level = Form.useWatch("level", form)

  const computedCode = useMemo(() => {
    if (!type || !level) return ""
    return autoCode(type, level, seq)
  }, [type, level, seq])

  return (
    <Space direction="vertical" size={16} className="w-full">
      <Card
        title={
          <Space>
            <FileText />
            <span>预警清单管理</span>
          </Space>
        }
      >
        <Row gutter={12}>
          <Col xs={24} md={10}>
            <Card size="small" title="新增/修改事项">
              <Form
                form={form}
                layout="vertical"
                initialValues={{ type: "综合", level: "黄色" }}
                onFinish={(vals) => {
                  const item: MatterItem = {
                    id: genId("matter"),
                    code: computedCode || autoCode(vals.type, vals.level, seq),
                    name: vals.name,
                    type: vals.type,
                    level: vals.level,
                    status: "启用",
                    createdAt: new Date().toISOString(),
                    updatedAt: new Date().toISOString(),
                  }
                  setMatters((prev) => [item, ...prev])
                  setSeq((s) => s + 1)
                  form.resetFields()
                  globalMessage.success("已新增事项")
                }}
              >
                <Form.Item label="事项名称" name="name" rules={[{ required: true }]}>
                  <Input placeholder="事项名称" />
                </Form.Item>
                <Flex gap={12} wrap="wrap">
                  <Form.Item label="专项类型" name="type" rules={[{ required: true }]} style={{ flex: 1 }}>
                    <Select options={TYPES.map((t) => ({ label: t, value: t }))} />
                  </Form.Item>
                  <Form.Item label="预警等级" name="level" rules={[{ required: true }]} style={{ width: 180 }}>
                    <Select options={LEVELS.map((l) => ({ label: l, value: l }))} />
                  </Form.Item>
                </Flex>
                <Form.Item label="事项编码（自动生成）">
                  <Input value={computedCode} readOnly />
                </Form.Item>
                <Space>
                  <Button type="primary" htmlType="submit">
                    保存
                  </Button>
                  <Button onClick={() => form.resetFields()}>重置</Button>
                </Space>
              </Form>
            </Card>
          </Col>
          <Col xs={24} md={14}>
            <Card size="small" title="事项信息列表">
              <Table<MatterItem>
                size="small"
                rowKey="id"
                dataSource={matters}
                pagination={{ pageSize: 6 }}
                columns={[
                  { title: "名称", dataIndex: "name" },
                  { title: "编码", dataIndex: "code" },
                  { title: "类型", dataIndex: "type" },
                  { title: "等级", dataIndex: "level" },
                  {
                    title: "状态",
                    dataIndex: "status",
                    render: (s: MatterItemStatus) => (
                      <Tag color={s === "启用" ? "success" : s === "禁用" ? "default" : "error"}>{s}</Tag>
                    ),
                  },
                  {
                    title: "操作",
                    render: (_, r) => (
                      <Space>
                        <Button
                          size="small"
                          onClick={() =>
                            setMatters((prev) =>
                              prev.map((m) =>
                                m.id === r.id
                                  ? {
                                    ...m,
                                    status: m.status === "启用" ? ("禁用" as const) : ("启用" as const),
                                    updatedAt: new Date().toISOString(),
                                  }
                                  : m,
                              ),
                            )
                          }
                        >
                          {r.status === "启用" ? "禁用" : "启用"}
                        </Button>
                        <Popconfirm
                          title="确定作废该事项？"
                          onConfirm={() =>
                            setMatters((prev) =>
                              prev.map((m) =>
                                m.id === r.id ? { ...m, status: "作废", updatedAt: new Date().toISOString() } : m,
                              ),
                            )
                          }
                        >
                          <Button size="small" danger>
                            作废
                          </Button>
                        </Popconfirm>
                      </Space>
                    ),
                  },
                ]}
              />
            </Card>
          </Col>
        </Row>
      </Card>

      <Card
        title={
          <Space>
            <Alert />
            <span>预警原因库管理</span>
          </Space>
        }
      >
        <Row gutter={12}>
          <Col xs={24} md={10}>
            <Card size="small" title="新增原因">
              <Form
                layout="vertical"
                onFinish={(vals: any) => {
                  const item: ReasonEntry = {
                    id: genId("reason"),
                    type: vals.type,
                    level: vals.level,
                    reason: vals.reason,
                    createdAt: new Date().toISOString(),
                  }
                  setReasons((prev) => [item, ...prev])
                  globalMessage.success("已添加原因")
                }}
                initialValues={{ type: "综合", level: "黄色" }}
              >
                <Form.Item label="类型" name="type" rules={[{ required: true }]}>
                  <Select options={TYPES.map((t) => ({ label: t, value: t }))} />
                </Form.Item>
                <Form.Item label="等级" name="level" rules={[{ required: true }]}>
                  <Select options={LEVELS.map((l) => ({ label: l, value: l }))} />
                </Form.Item>
                <Form.Item label="原因描述" name="reason" rules={[{ required: true }]}>
                  <Input.TextArea rows={3} placeholder="维护原因项，供处置人员选择" />
                </Form.Item>
                <Button type="primary" htmlType="submit">
                  添加
                </Button>
              </Form>
            </Card>
          </Col>
          <Col xs={24} md={14}>
            <Card size="small" title="原因库">
              <Table<ReasonEntry>
                size="small"
                rowKey="id"
                dataSource={reasons}
                pagination={{ pageSize: 6 }}
                columns={[
                  { title: "类型", dataIndex: "type" },
                  { title: "等级", dataIndex: "level" },
                  { title: "原因", dataIndex: "reason" },
                  { title: "创建时间", dataIndex: "createdAt", render: (t) => dayjs(t).format("YYYY-MM-DD") },
                ]}
              />
            </Card>
          </Col>
        </Row>
      </Card>
    </Space>
  )
}