import { col } from '../csv.js';
import {
  PALETTE, FONT, axisCommon, categoryAxis, titleStyle, legendStyle,
  lineSeries, footnote, watermarks, LAYOUT,
} from '../theme.js';

/**
 * 图 1：双柱 + 折线，左右双 Y 轴
 * 存货/营收走左轴（亿元），周转天数走右轴（天）
 */
export function inventoryChart(rows, { width, height }) {
  const periods = col(rows, 'period');

  return {
    backgroundColor: '#fff',
    title: { ...titleStyle, text: '存货、营收与存货周转天数（半年与年度）' },
    legend: {
      ...legendStyle,
      top: LAYOUT.legendTop,
      data: [
        { name: '存货', icon: 'rect' },
        { name: '营收', icon: 'rect' },
        { name: '存货周转天数', icon: 'emptyCircle' },  // 折线
      ],
    },
    grid: { left: 78, right: 82, top: LAYOUT.gridTop, bottom: 90 },
    tooltip: {
      trigger: 'axis',
      axisPointer: { type: 'shadow' },
      textStyle: { fontFamily: FONT },
    },
    xAxis: { ...categoryAxis, data: periods },
    yAxis: [
      {
        ...axisCommon,
        type: 'value',
        name: '金额（亿元）',
        nameLocation: 'middle',
        nameGap: 52,
        nameTextStyle: { color: PALETTE.grey, fontSize: 13, fontFamily: FONT },
        min: 0,
        max: 500,
        interval: 100,
      },
      {
        ...axisCommon,
        type: 'value',
        name: '同比增速（%）',
        nameLocation: 'middle',
        nameGap: 58,
        nameRotate: -90,
        nameTextStyle: { color: PALETTE.grey, fontSize: 13, fontFamily: FONT },
        min: -5,
        max: 220,
        interval: 50,
        axisLabel: {
          ...axisCommon.axisLabel,
          formatter: '{value}天',
        },
        splitLine: { show: false },
      },
    ],
    series: [
      {
        name: '存货',
        type: 'bar',
        data: col(rows, 'inventory'),
        barWidth: 22,
        barGap: '15%',
        itemStyle: { color: PALETTE.brown },
        label: {
          show: true,
          position: 'top',
          color: PALETTE.ink,
          fontSize: 12,
          fontWeight: 'bold',
          fontFamily: FONT,
        },
      },
      {
        name: '营收',
        type: 'bar',
        data: col(rows, 'revenue'),
        barWidth: 22,
        itemStyle: { color: PALETTE.sand },
        label: {
          show: true,
          position: 'top',
          color: PALETTE.ink,
          fontSize: 12,
          fontFamily: FONT,
        },
      },
      {
        ...lineSeries({
          name: '存货周转天数',
          data: col(rows, 'turnover_days'),
          color: PALETTE.coral,
          labelPosition: 'bottom',
          formatter: (p) => `${p.value}天`,
        }),
        yAxisIndex: 1,
        z: 10,
      },
    ],
    graphic: [
      ...watermarks(width, height),
      footnote(
        '周转天数=平均存货÷当期销售成本×期间天数（半年181/年度365，期初=上一年末，日历天数口径）；' +
        '与公司披露一致：23年133/24年102/25年123/26H1 201天 | @思考的Joey'
      ),
    ],
  };
}