/**
 * График доходов для Dashboard ментора
 */

'use client';

import React, { useMemo } from 'react';
import dynamic from 'next/dynamic';
import { IncomeChartData } from '@/api/dashboard';

const ApexChart = dynamic(() => import('react-apexcharts'), { ssr: false });

interface RevenueChartProps {
  data: IncomeChartData[];
  loading?: boolean;
  period?: 'day' | 'week' | 'month';
  /** Показывать серию «Занятий» (по умолчанию true для дашборда) */
  showLessons?: boolean;
  /** Высота графика в px (по умолчанию 250) */
  height?: number;
}

export const RevenueChart: React.FC<RevenueChartProps> = ({
  data,
  loading,
  period = 'month',
  showLessons = true,
  height = 250,
}) => {
  if (!data || data.length === 0) {
    return (
      <div
        style={{
          height: `${height}px`,
          display: 'flex',
          alignItems: 'center',
          justifyContent: 'center',
          color: 'var(--md-sys-color-on-surface-variant)',
          fontSize: '14px',
        }}
      >
        {loading ? 'Загрузка...' : 'Нет данных'}
      </div>
    );
  }

  const { categories, incomeSeries, lessonsSeries } = useMemo(() => {
    const items = Array.isArray(data) ? data : [];
    return {
      categories: items.map((item) => item.date),
      incomeSeries: items.map((item) => item.income),
      lessonsSeries: items.map((item) => item.lessons),
    };
  }, [data]);

  const options: any = useMemo(
    () => ({
      chart: {
        id: 'mentor-income-chart',
        toolbar: { show: false },
        zoom: { enabled: false },
        animations: {
          enabled: true,
          easing: 'easeinout',
          speed: 400,
        },
      },
      stroke: {
        curve: 'smooth',
        width: showLessons ? [3, 2] : 3,
      },
      colors: showLessons ? ['#6750A4', '#7D5260'] : ['#6750A4'],
      dataLabels: {
        enabled: false,
      },
      legend: {
        show: showLessons,
        position: 'top',
        horizontalAlign: 'left',
        markers: {
          width: 10,
          height: 10,
          radius: 12,
        },
        labels: {
          colors: 'var(--md-sys-color-on-surface)',
          style: {
            fontSize: '15px',
          },
        },
      },
      xaxis: {
        categories,
        axisBorder: { show: false },
        axisTicks: { show: false },
        labels: {
          formatter: (val: string) => {
            if (typeof val === 'string' && /^\d{2}\.\d{2}$/.test(val)) {
              return val.split('.')[0];
            }
            return val;
          },
          style: {
            colors: 'var(--md-sys-color-on-surface-variant)',
            fontSize: '18px',
          },
        },
      },
      yaxis: showLessons
        ? [
            {
              seriesName: 'Доход',
              labels: {
                formatter: (val: number) => `${Math.round(val)} ₽`,
                style: {
                  colors: 'var(--md-sys-color-on-surface-variant)',
                  fontSize: '18px',
                },
              },
            },
            {
              opposite: true,
              seriesName: 'Занятий',
              labels: {
                style: {
                  colors: 'var(--md-sys-color-on-surface-variant)',
                  fontSize: '18px',
                },
              },
            },
          ]
        : [
            {
              labels: {
                formatter: (val: number) => `${Math.round(val)} ₽`,
                style: {
                  colors: 'var(--md-sys-color-on-surface-variant)',
                  fontSize: '18px',
                },
              },
            },
          ],
      fill: {
        type: showLessons ? ['gradient', 'solid'] : 'gradient',
        gradient: {
          shade: 'dark',
          type: 'vertical',
          shadeIntensity: 0.6,
          gradientToColors: ['rgba(103,80,164,0)'],
          inverseColors: false,
          opacityFrom: 0.7,
          opacityTo: 0.15,
          stops: [0, 25, 50, 75, 100],
        },
      },
      tooltip: {
        shared: showLessons,
        intersect: false,
        style: {
          fontSize: '15px',
        },
        x: {
          show: true,
        },
        y: {
          formatter: (val: number, { seriesIndex }: any) =>
            showLessons && seriesIndex === 1
              ? `${val} занятий`
              : `${Math.round(Number(val)).toLocaleString('ru-RU')} ₽`,
        },
      },
      grid: {
        borderColor: 'var(--ios26-list-divider)',
        strokeDashArray: 4,
        yaxis: {
          lines: { show: true },
        },
      },
      markers: {
        size: 0,
        hover: {
          size: 4,
        },
      },
    }),
    [categories, showLessons],
  );

  const series = useMemo(
    () =>
      showLessons
        ? [
            { name: 'Доход', type: 'area' as const, data: incomeSeries },
            { name: 'Занятий', type: 'line' as const, data: lessonsSeries },
          ]
        : [{ name: 'Доход', type: 'area' as const, data: incomeSeries }],
    [incomeSeries, lessonsSeries, showLessons],
  );

  return (
    <div style={{ width: '100%', height: `${height}px` }}>
      <ApexChart options={options} series={series} type="line" height={height} />
    </div>
  );
};