'use client'
import React, {useCallback, useContext, useEffect, useMemo} from "react";
import {Calendar, dayjsLocalizer, Event, SlotInfo, View} from 'react-big-calendar'
// https://day.js.org/docs/zh-CN/get-set/get-set
import dayjs, {Dayjs} from 'dayjs'
import 'react-big-calendar/lib/css/react-big-calendar.css'
import {getTaskTreeResult, OPERATION_BUTTON_TYPE} from "@/lib/task/project/data";
import {useSearchParams} from "next/dist/client/components/navigation";
import {DetailModelForm} from "@/ui/task/project/DetailModelForm";
import {SearchObject} from "@/lib/definitions";
import LocalContext from "@/ui/LocalContent";

/**
 * https://github.com/jquense/react-big-calendar?tab=readme-ov-file
 * @constructor
 */
const localizer = dayjsLocalizer(dayjs)
const CalShow: React.FC = () => {
    dayjs.locale('zh-cn')
    const [view, setView] = React.useState<View>('month');
    const [date, setDate] = React.useState<Date>(new Date());
    // 展示在页面的任务,默认获取当前月的信息。
    const [events, setEvents] = React.useState<Event[]>([]);
    const [open, setOpen] = React.useState(false);
    const [description, setDescription] = React.useState('');
    const [operationId, setOperationId] = React.useState(-1);
    const [itemId,setItemId] = React.useState(-1);
    const [expectedStartTime,setExpectedStartTime] = React.useState<Dayjs>();
    const [expectedEndTime,setExpectedEndTime] = React.useState<Dayjs>();
    let state:string=useContext(LocalContext).taskState
    const handleViewChange = (newView: View) => {
        setView(newView);
    };
    var pid = useSearchParams().get('pid');
    const handleNavigate = (newDate: Date) => {
        console.log('handleNavigate', newDate)
        setDate(newDate);
        const searchList:SearchObject[] = []
        if (pid != null) {
            searchList.push({name: "pid", value: pid, operateType: "="}, {
                name: 'TREE',
                value: "false",
                operateType: "TREE"
            });
        }
        searchList.push({name: "expectedStartTime", value: dayjs(newDate).startOf('month'), operateType: ">="})
        searchList.push({name: 'expectedStartTime', value: dayjs(newDate).endOf('month'), operateType: "<="})
        loadData(searchList);
    };

    useEffect(() => {
        const searchListE = []
        if (pid != null) {
            searchListE.push({name: "pid", value: pid, operateType: "="}, {
                name: 'TREE',
                value: "false",
                operateType: "TREE"
            });
        }
        if (view === 'month') {
            searchListE.push({name: 'expectedStartTime', value: dayjs(date).startOf('month'), operateType: ">="})
            searchListE.push({name: 'expectedStartTime', value: dayjs(date).endOf('month'), operateType: "<="})
        } else {
            searchListE.push({name: 'expectedStartTime', value: dayjs(date).startOf('week'), operateType: ">="})
            searchListE.push({name: 'expectedStartTime', value: dayjs(date).endOf('week'), operateType: "<="})
        }
        loadData(searchListE);
    }, [useContext(LocalContext)]);
    const message = {
        week: '周',
        work_week: '工作周',
        day: '天',
        month: '月',
        previous: '前',
        next: '后',
        today: '当下',
        agenda: '日程'
    }
    const loadData = (searchList:SearchObject[])=>{
        if (state.length > 0){
            searchList.push({name: 'state', value: state, operateType: "IN"})
        }
        searchList.push({name: 'expectedEndTime', value: dayjs(date).endOf('month'), operateType: "NOT NULL"})
        let request = JSON.stringify({
            pageSize: 9999,
            pageNumber: 1,
            data: searchList
        })
        getTaskTreeResult(request).then(responseD => {
            if (responseD.status.success) {
                setEvents(responseD.data.content.map(taskState => {
                    return {
                        start: dayjs(taskState.expectedStartTime).toDate(),
                        end: dayjs(taskState.expectedEndTime).toDate(),
                        title: taskState.name,
                        resource:taskState.id
                    }
                }))
            }
        })
    }
    const reloadData = ()=>{
        setOpen(false)
        handleNavigate(expectedStartTime?expectedStartTime.toDate():date)
    }
    const handleSelectSlot = useCallback(
        ({start, end}: SlotInfo) => {
            setExpectedEndTime(dayjs(end))
            setExpectedStartTime(dayjs(start))
            setOperationId(OPERATION_BUTTON_TYPE.ADD)
            setDescription("添加任务")
            setOpen(true);
        },
        [setEvents]
    )

    const handleSelectEvent = useCallback(
        (event: Event, e: React.SyntheticEvent<HTMLElement>) => {
            // window.alert(event.title);
            console.log(event)
            setOperationId(OPERATION_BUTTON_TYPE.DETAIL)
            setDescription("任务详情")
            setItemId(event.resource)
            setOpen(true);
        },
        []
    )
    const {defaultDate, scrollToTime} = useMemo(
        () => ({
            defaultDate: new Date(2015, 3, 12),
            scrollToTime: new Date(1970, 1, 1, 6),
        }),
        []
    )
    return <div className="App" style={{height: '90vh'}}>
        <DetailModelForm operationId={operationId} description={description} open={open} haveButton={false} itemId={itemId}
                         reloadData={reloadData} expectedStartTime={expectedStartTime} expectedEndTime={expectedEndTime}/>
        <Calendar
            localizer={localizer}
            events={events}
            view={view}
            onView={handleViewChange}
            // onRangeChange={rangeChange}
            date={date}
            onNavigate={handleNavigate}
            messages={message}
            // 点击任务
            onSelectEvent={handleSelectEvent}
            // 点击空白处添加任务
            onSelectSlot={handleSelectSlot}
            selectable
            scrollToTime={scrollToTime}
        />
    </div>
}
export default CalShow;