const COMPONENTS_MAP = {
  grid: 'GridComponent',
  polar: 'PolarComponent',
  geo: 'GeoComponent',
  singleAxis: 'SingleAxisComponent',
  parallel: 'ParallelComponent',
  calendar: 'CalendarComponent',
  graphic: 'GraphicComponent',
  toolbox: 'ToolboxComponent',
  tooltip: 'TooltipComponent',
  axisPointer: 'AxisPointerComponent',
  brush: 'BrushComponent',
  title: 'TitleComponent',
  timeline: 'TimelineComponent',
  markPoint: 'MarkPointComponent',
  markLine: 'MarkLineComponent',
  markArea: 'MarkAreaComponent',
  legend: 'LegendComponent',
  dataZoom: 'DataZoomComponent',
  visualMap: 'VisualMapComponent',
  aria: 'AriaComponent',
  dataset: 'DatasetComponent',

  // Dependencies
  xAxis: 'GridComponent',
  yAxis: 'GridComponent',
  angleAxis: 'PolarComponent',
  radiusAxis: 'PolarComponent'
};

const CHARTS_MAP = {
  line: 'LineChart',
  bar: 'BarChart',
  pie: 'PieChart',
  scatter: 'ScatterChart',
  radar: 'RadarChart',
  map: 'MapChart',
  tree: 'TreeChart',
  treemap: 'TreemapChart',
  graph: 'GraphChart',
  gauge: 'GaugeChart',
  funnel: 'FunnelChart',
  parallel: 'ParallelChart',
  sankey: 'SankeyChart',
  boxplot: 'BoxplotChart',
  candlestick: 'CandlestickChart',
  effectScatter: 'EffectScatterChart',
  lines: 'LinesChart',
  heatmap: 'HeatmapChart',
  pictorialBar: 'PictorialBarChart',
  themeRiver: 'ThemeRiverChart',
  sunburst: 'SunburstChart',
  custom: 'CustomChart'
};
const COMPONENTS_GL_MAP = {
  grid3D: 'Grid3DComponent',
  geo3D: 'Geo3DComponent',
  globe: 'GlobeComponent',
  mapbox3D: 'Mapbox3DComponent',
  maptalks3D: 'Maptalks3DComponent',

  // Dependencies
  xAxis3D: 'Grid3DComponent',
  yAxis3D: 'Grid3DComponent',
  zAxis3D: 'Grid3DComponent'
};
const CHARTS_GL_MAP = {
  bar3D: 'Bar3DChart',
  line3D: 'Line3DChart',
  scatter3D: 'Scatter3DChart',
  lines3D: 'Lines3DChart',
  polygons3D: 'Polygons3DChart',
  surface: 'SurfaceChart',
  map3D: 'Map3DChart',

  scatterGL: 'ScatterGLChart',
  graphGL: 'GraphGLChart',
  flowGL: 'FlowGLChart',
  linesGL: 'LinesGLChart'
};

const FEATURES = ['UniversalTransition', 'LabelLayout'];

const EXTENSIONS_MAP = {
  bmap: 'bmap/bmap'
  // PENDING: There seem no examples that use dataTool
  // dataTool: 'dataTool'
};

const COMPONENTS_MAP_REVERSE = {};
const CHARTS_MAP_REVERSE = {};
const CHARTS_GL_MAP_REVERSE = {};
const COMPONENTS_GL_MAP_REVERSE = {};

const RENDERERS_MAP_REVERSE = {
  SVGRenderer: 'svg',
  CanvasRenderer: 'canvas'
};

// Component that will be injected automatically in preprocessor
// These should be excluded util find they were used explicitly.
const MARKERS = ['markLine', 'markArea', 'markPoint'];
const INJECTED_COMPONENTS = [
  ...MARKERS,
  'grid',
  'axisPointer',
  'aria' // TODO aria
];

// Component that was dependent.
const DEPENDENT_COMPONENTS = [
  'xAxis',
  'yAxis',
  'angleAxis',
  'radiusAxis',
  'xAxis3D',
  'yAxis3D',
  'zAxis3D'
];

function createReverseMap(map, reverseMap) {
  Object.keys(map).forEach((key) => {
    // Exclude dependencies.
    if (DEPENDENT_COMPONENTS.includes(key)) {
      return;
    }
    reverseMap[map[key]] = key;
  });
}

createReverseMap(COMPONENTS_MAP, COMPONENTS_MAP_REVERSE);
createReverseMap(CHARTS_MAP, CHARTS_MAP_REVERSE);
createReverseMap(COMPONENTS_GL_MAP, COMPONENTS_GL_MAP_REVERSE);
createReverseMap(CHARTS_GL_MAP, CHARTS_GL_MAP_REVERSE);

module.exports.collectDeps = function collectDeps(option) {
  let deps = [];
  if (option.options) {
    // TODO getOption() doesn't have baseOption and options.
    option.options.forEach((opt) => {
      deps = deps.concat(collectDeps(opt));
    });

    if (option.baseOption) {
      deps = deps.concat(collectDeps(option.baseOption));
    }

    // Remove duplicates
    return Array.from(new Set(deps));
  }

  Object.keys(option).forEach((key) => {
    if (INJECTED_COMPONENTS.includes(key)) {
      return;
    }
    const val = option[key];

    if (Array.isArray(val) && !val.length) {
      return;
    }

    if (COMPONENTS_MAP[key]) {
      deps.push(COMPONENTS_MAP[key]);
    }
    if (COMPONENTS_GL_MAP[key]) {
      deps.push(COMPONENTS_GL_MAP[key]);
    }
    if (EXTENSIONS_MAP[key]) {
      deps.push(key);
    }
  });

  let series = option.series;
  if (!Array.isArray(series)) {
    series = [series];
  }

  series.forEach((seriesOpt) => {
    if (CHARTS_MAP[seriesOpt.type]) {
      deps.push(CHARTS_MAP[seriesOpt.type]);
    }
    if (CHARTS_GL_MAP[seriesOpt.type]) {
      deps.push(CHARTS_GL_MAP[seriesOpt.type]);
    }
    if (seriesOpt.type === 'map') {
      // Needs geo component when using map
      deps.push(COMPONENTS_MAP.geo);
    }
    if (seriesOpt.coordinateSystem === 'bmap') {
      deps.push('bmap');
    }
    MARKERS.forEach((markerType) => {
      if (seriesOpt[markerType]) {
        deps.push(COMPONENTS_MAP[markerType]);
      }
    });
    // Features
    if (seriesOpt.labelLayout) {
      deps.push('LabelLayout');
    }
    if (seriesOpt.universalTransition) {
      deps.push('UniversalTransition');
    }
  });
  // Dataset transform
  if (option.dataset && Array.isArray(option.dataset)) {
    option.dataset.forEach((dataset) => {
      if (dataset.transform) {
        deps.push('TransformComponent');
      }
    });
  }

  // Remove duplicates
  return Array.from(new Set(deps));
};

function buildMinimalBundleCode(deps, includeType) {
  const chartsImports = [];
  const componentsImports = [];
  const chartsGLImports = [];
  const componentsGLImports = [];
  const featuresImports = [];
  const renderersImports = [];
  const extensionImports = [];
  deps.forEach(function (dep) {
    if (dep.endsWith('Renderer')) {
      renderersImports.push(dep);
    } else if (CHARTS_MAP_REVERSE[dep]) {
      chartsImports.push(dep);
      if (includeType) {
        chartsImports.push(dep.replace(/Chart$/, 'SeriesOption'));
      }
    } else if (COMPONENTS_MAP_REVERSE[dep]) {
      componentsImports.push(dep);
      if (includeType) {
        componentsImports.push(dep.replace(/Component$/, 'ComponentOption'));
      }
    } else if (dep === 'TransformComponent') {
      // TransformComponent don't have individual option type.
      // TODO will put in to an config if there are other similar components
      componentsImports.push(dep);
    } else if (CHARTS_GL_MAP_REVERSE[dep]) {
      chartsGLImports.push(dep);
    } else if (COMPONENTS_GL_MAP_REVERSE[dep]) {
      componentsGLImports.push(dep);
    } else if (FEATURES.includes(dep)) {
      featuresImports.push(dep);
    } else if (EXTENSIONS_MAP[dep]) {
      extensionImports.push(dep);
    }
  });

  function getImportsPartCode(imports) {
    return `${imports
      .map(
        (str) => `
    ${str}`
      )
      .join(',')}`;
  }

  const allImports = [
    ...componentsImports,
    ...chartsImports,
    ...componentsGLImports,
    ...chartsGLImports,
    ...renderersImports,
    ...featuresImports
  ];

  const ECOptionTypeCode = `
type EChartsOption = echarts.ComposeOption<
    ${allImports.filter((a) => a.endsWith('Option')).join(' | ')}
>`;
  const importsCodes = [
    [componentsImports, 'echarts/components'],
    [chartsImports, 'echarts/charts'],
    [featuresImports, 'echarts/features'],
    [renderersImports, 'echarts/renderers'],
    [chartsGLImports, 'echarts-gl/charts'],
    [componentsGLImports, 'echarts-gl/components']
  ]
    .filter((a) => a[0].length > 0)
    .map((item) =>
      `
import {${getImportsPartCode(item[0])}
} from '${item[1]}';
    `.trim()
    );

  getExtensionDeps(extensionImports, includeType).forEach((ext) => {
    importsCodes.push(`import '${ext}';`);
  });

  return (
    `import * as echarts from 'echarts/core';
${importsCodes.join('\n')}

echarts.use(
    [${allImports.filter((a) => !a.endsWith('Option')).join(', ')}]
);
` + (includeType ? ECOptionTypeCode : '')
  );
}

module.exports.buildMinimalBundleCode = buildMinimalBundleCode;

function buildLegacyMinimalBundleCode(deps, isESM) {
  const modules = [];
  deps.forEach(function (dep) {
    if (dep.endsWith('Renderer') && dep !== 'CanvasRenderer') {
      modules.push(
        `zrender/lib/${RENDERERS_MAP_REVERSE[dep]}/${RENDERERS_MAP_REVERSE[dep]}`
      );
    } else if (CHARTS_MAP_REVERSE[dep]) {
      modules.push(`echarts/lib/chart/${CHARTS_MAP_REVERSE[dep]}`);
    } else if (COMPONENTS_MAP_REVERSE[dep]) {
      modules.push(`echarts/lib/component/${COMPONENTS_MAP_REVERSE[dep]}`);
    } else if (CHARTS_GL_MAP_REVERSE[dep]) {
      modules.push(`echarts-gl/lib/chart/${CHARTS_GL_MAP_REVERSE[dep]}`);
    } else if (COMPONENTS_GL_MAP_REVERSE[dep]) {
      modules.push(
        `echarts-gl/lib/component/${COMPONENTS_GL_MAP_REVERSE[dep]}`
      );
    } else if (EXTENSIONS_MAP[dep]) {
      modules.push(getExtensionDeps([dep], false)[0]);
    }
  });

  return isESM
    ? `import * as echarts from 'echarts/lib/echarts';
${modules
  .map((mod) => {
    return `import '${mod}';`;
  })
  .join('\n')}
`
    : `const echarts = require('echarts/lib/echarts');
${modules
  .map((mod) => {
    return `require('${mod}');`;
  })
  .join('\n')}
`;
}

function hasGLInDeps(deps) {
  return !!deps.find(
    (dep) => !!(CHARTS_GL_MAP_REVERSE[dep] || COMPONENTS_GL_MAP_REVERSE[dep])
  );
}

function getExtensionDeps(deps, ts) {
  return deps
    .filter((dep) => EXTENSIONS_MAP[dep])
    .map(
      (dep) => `echarts/extension${ts ? '-src' : ''}/${EXTENSIONS_MAP[dep]}`
    );
}

function getBMapTip(isZHLang) {
  return `// ${
    isZHLang
      ? '请确保在引入百度地图扩展之前已经引入百度地图 JS API 脚本并成功加载'
      : 'Please ensure BaiduMap script has been loaded before importing bmap extension'
  }\n// https://api.map.baidu.com/api?v=3.0&ak=${
    isZHLang ? '你申请的AK' : 'YOUR_APP_KEY'
  }\n`;
}

module.buildLegacyMinimalBundleCode = buildLegacyMinimalBundleCode;

module.exports.buildExampleCode = function (
  jsCode,
  deps,
  {
    // If enable minimal import
    minimal,
    // If is ESM module or CommonJS module
    // Force to be true in ts mode or minimal mode.
    esm = true,
    // If use legacy minimal import, like:
    // import 'echarts/lib/chart/bar';
    // Only available when minimal is true.
    legacy,
    // If is ts code
    ts,
    // Theme
    theme,
    renderer,
    useDirtyRect,
    ROOT_PATH,
    // Other imports code code string
    // For example
    // `import 'echarts-liquidfill'`
    extraImports,
    // language
    isZHLang
  }
) {
  // if (minimal && !legacy) {
  //     // ESM must be used when use the new minimal import
  //     esm = true;
  // }

  if (ts) {
    esm = true;
  }

  if (minimal && !esm) {
    // Only legacy mode can be used when use require in mimimal bundle.
    legacy = true;
  }

  const hasECStat = jsCode.indexOf('ecStat') >= 0;
  const usedRootPath = jsCode.indexOf('ROOT_PATH') >= 0;
  const usedApp = jsCode.indexOf('app') >= 0;

  const DEP_CODE = `
${
  hasECStat
    ? esm
      ? `import ecStat from 'echarts-stat';`
      : `var ecStat = require('echarts-stat');`
    : ''
}
`;

  const IMPORT_CODE = [
    !minimal
      ? esm
        ? `import * as echarts from 'echarts';${
            hasGLInDeps(deps) ? `\nimport 'echarts-gl';` : ''
          }${
            getExtensionDeps(deps, ts).length
              ? `\n${getExtensionDeps(deps, ts)
                  .map((dep) => `import '${dep}';`)
                  .join('\n')}`
              : ''
          }`
        : `var echarts = require('echarts');${
            hasGLInDeps(deps) ? `\nrequire('echarts-gl');` : ''
          }${
            getExtensionDeps(deps, ts).length
              ? `\n${getExtensionDeps(deps, ts)
                  .map((dep) => `require('${dep}');`)
                  .join('\n')}`
              : ''
          }`
      : legacy
      ? buildLegacyMinimalBundleCode(deps, esm)
      : buildMinimalBundleCode(deps, ts),
    theme && theme !== 'dark'
      ? esm
        ? `import 'echarts/theme/${theme}'`
        : `require('echarts/theme/${theme}')`
      : '',
    extraImports
  ]
    .filter((a) => !!a)
    .join('\n');

  const ENV_CODE = [
    usedRootPath ? `var ROOT_PATH = '${ROOT_PATH}';` : '',
    usedApp ? `var app${ts ? ': any' : ''} = {};` : '',
    ts && !minimal ? 'type EChartsOption = echarts.EChartsOption' : ''
  ]
    .filter((a) => !!a)
    .join('\n');

  const bmapExtDep = getExtensionDeps(['bmap'], ts)[0];
  const PREPARE_CODE = [
    IMPORT_CODE.trim().replace(
      new RegExp(`((?:import|require)\\s*\\(?'${bmapExtDep}'\\)?;)`),
      getBMapTip(isZHLang) + '$1'
    ),
    DEP_CODE.trim(),
    ENV_CODE.trim()
  ]
    .filter((a) => !!a)
    .join('\n\n');

  const hasTheme = !!theme;
  const hasRenderer = renderer !== 'canvas';
  const hasUseDirtyRect = useDirtyRect && !hasRenderer;
  const hasOption = hasRenderer || hasUseDirtyRect;

  return `${PREPARE_CODE}

var chartDom = document.getElementById('main')${ts ? '!' : ''};
var myChart = echarts.init(chartDom${
    hasTheme ? `, '${theme}'` : hasOption ? ', null' : ''
  }${
    hasOption
      ? `, {
${[
  hasRenderer && `renderer: '${renderer}'`,
  hasUseDirtyRect && 'useDirtyRect: true'
]
  .filter(Boolean)
  .map((t) => '  ' + t)
  .join(',\n')}
}`
      : ''
  });
var option${ts ? ': EChartsOption' : ''};

${jsCode.trim()}

option && myChart.setOption(option);
`;
};