import type { AnalysisMoneyAmount } from '@/types/money/analysis'
import dayjs from 'dayjs'
import { useEffect, useState } from 'react'
import { ScrollView, Text, TouchableOpacity, View } from 'react-native'
import { VictoryChart, VictoryLabel, VictoryLine, VictoryPie, VictoryTheme, VictoryTooltip } from 'victory-native'
import { ADatePicker, ADateRangePicker, ASegmentedTabs, LucideIcon } from '@/components/common/ao'
import EmptyState from '@/components/common/EmptyStatus'
import CustomHeader from '@/components/custom/Header'
import PagerTabs from '@/components/custom/PagerTabs'
import { analysisMoneyLineApi, analysisMoneyPieApi } from '@/request/api/money/analysis'
import { MoneyCategoryEnum } from '@/types/money/category'
import { add } from '@/utils/math'
import { getCurrentYear, getCurrentYearMonth, getEndOfMonth, getStartOfMonth } from '@/utils/time'

interface AnalysisContentProps {
  analysisType: MoneyCategoryEnum
}

export default function Analysis() {
  function AnalysisContent({ analysisType }: AnalysisContentProps) {
    // 按月0 按年1 自定义2
    const [timeType, setTimeType] = useState<number>(0)

    // 开始结束时间
    const [startDate, setStartDate] = useState(getCurrentYearMonth())
    const [endDate, setEndDate] = useState('')

    // 显示
    const [showDatePicker, setShowDatePicker] = useState(false)

    // 数据
    const [lineRecords, setLineRecords] = useState<AnalysisMoneyAmount[]>([])
    const [pieRecords, setPieRecords] = useState<AnalysisMoneyAmount[]>([])

    // 请求
    function fetchChartsData() {
      let start = ''
      let end = ''

      const selectedStartDate = dayjs(startDate)
      const selectedEndDate = dayjs(endDate)

      let periodType = 0

      if (timeType === 0) {
        start = selectedStartDate.startOf('month').format('YYYY-MM-DD')
        end = selectedStartDate.endOf('month').format('YYYY-MM-DD')

        periodType = 0
      }
      else if (timeType === 1) {
        start = selectedStartDate.startOf('year').format('YYYY-MM-DD')
        end = selectedStartDate.endOf('year').format('YYYY-MM-DD')

        periodType = 1
      }
      else {
        if (selectedStartDate.isSame(selectedEndDate, 'month')) {
          periodType = 0
          start = selectedStartDate.startOf('month').format('YYYY-MM-DD')
          end = selectedEndDate.endOf('month').format('YYYY-MM-DD')
        }
        else if (selectedStartDate.isSame(selectedEndDate, 'year')) {
          periodType = 1
          start = selectedStartDate.startOf('year').format('YYYY-MM-DD')
          end = selectedEndDate.endOf('year').format('YYYY-MM-DD')
        }
        else {
          periodType = 2
          start = selectedStartDate.format('YYYY-MM-DD')
          end = selectedEndDate.format('YYYY-MM-DD')
        }
      }

      analysisMoneyLineApi({
        start_date: start,
        end_date: end,
        type: analysisType,
        period_type: periodType,
      }).then((res) => {
        if (res.isSuccess) {
          setLineRecords(res.data.records)
        }
      })

      analysisMoneyPieApi({
        start_date: start,
        end_date: end,
        type: analysisType,
        period_type: periodType,
      }).then((res) => {
        if (res.isSuccess) {
          setPieRecords(res.data.records)
        }
      })
    }
    const totalAmount: number = pieRecords.reduce(
      (sum, item) => Number(add(sum, Number(item.y) || 0)),
      0,
    )

    useEffect(() => {
      fetchChartsData()
    }, [timeType, startDate, endDate])

    return (
      <ScrollView
        className="p-4"
      >
        <ASegmentedTabs
          value={timeType}
          onChange={(index) => {
            setTimeType(index)
            if (index === 2) {
              // 自定义类型，本月的 1号 - 终止号
              setStartDate(getStartOfMonth())
              setEndDate(getEndOfMonth())
            }
            else if (index === 1) {
              // 按年
              setStartDate(getCurrentYear())
              setEndDate('')
            }
            else {
              // 按月
              setStartDate(getCurrentYearMonth())
              setEndDate('')
            }
          }}
          tabs={[
            { key: '1', label: '按月' },
            { key: '2', label: '按年' },
            { key: '3', label: '自定义' },
          ]}
        />

        <TouchableOpacity
          className="flex flex-row justify-center items-center"
        >
          <LucideIcon icon="CalendarDays" size={14} color="#666" clickable={false} />
          <Text className="font-semibold text-lg mr-2 ml-1">{startDate}</Text>
          {timeType === 2 && (
            <>
              <Text> - </Text>
              <Text className="font-semibold text-lg mx-1">
                {endDate}
              </Text>
            </>
          )}
          <LucideIcon icon="ChevronDown" size={16} color="#666" clickable={false} />
        </TouchableOpacity>

        <View className="mt-4">
          <Text className="text-lg font-semibold text-gray-700">趋势分析</Text>

          <VictoryChart
            height={220}
            theme={VictoryTheme.material}
          >
            <VictoryLine
              interpolation="catmullRom"
              data={lineRecords}
              animate={{
                duration: 1000,
              }}
            />
          </VictoryChart>
        </View>

        <View
          className="mt-4"
        >
          <Text className="text-lg font-semibold text-gray-700">分类构成</Text>

          {
            pieRecords.length > 0
              ? (
                  <VictoryPie
                    height={250}
                    data={pieRecords}
                    theme={VictoryTheme.material}
                  />
                )
              : (
                  <EmptyState title="空" />
                )
          }

        </View>

        <View className="mt-4" style={{ paddingBottom: 24 }}>
          <View className="flex flex-row justify-between">
            <Text className="text-lg font-semibold text-gray-700">分类详细</Text>
            <Text>
              总：
              {totalAmount}
              {' '}
              元
            </Text>
          </View>

          {
            pieRecords.length > 0
              ? (
                  <View className="mt-4 flex flex-col gap-2">
                    {pieRecords.map((item, index) => (
                      <View
                        key={index}
                        className="flex flex-row justify-between items-center py-3 border-b border-gray-300"
                      >
                        <Text className="text-base font-medium text-gray-800">{item.x}</Text>
                        <Text className="text-base font-semibold text-gray-700">
                          {item.y}
                          {' '}
                          元
                        </Text>
                      </View>
                    ))}
                  </View>
                )
              : (
                  <EmptyState title="空" />
                )

          }

        </View>

        {
          timeType === 2
            ? (
                <ADateRangePicker
                  show={showDatePicker}
                  onConfirm={(startDate, endDate) => {
                    setStartDate(startDate)
                    setEndDate(endDate)
                    setShowDatePicker(false)
                  }}
                  onClose={() => {
                    setShowDatePicker(false)
                  }}
                />
              )
            : (
                <ADatePicker
                  show={showDatePicker}
                  mode={timeType === 0 ? 'month' : 'year'}
                  onConfirm={(val) => {
                    setStartDate(val)
                    setShowDatePicker(false)
                  }}
                  onClose={() => {
                    setShowDatePicker(false)
                  }}
                />
              )
        }
      </ScrollView>
    )
  }

  return (
    <View className="flex-1">
      <CustomHeader
        showHeader={false}
      />

      <PagerTabs
        showCustomHeader={true}
        routes={[
          {
            key: 'expense',
            title: '支出',
            element: <AnalysisContent analysisType={MoneyCategoryEnum.Expense} />,
          },
          {
            key: 'income',
            title: '收入',
            element: <AnalysisContent analysisType={MoneyCategoryEnum.Income} />,
          },
        ]}
      />
    </View>
  )
}