const path = require('path')

const parser = require('@babel/parser')

const {
  parseComponent,
  compile,
  compileToFunctions,
  ssrCompile,
  ssrCompileToFunctions
} = require('vue-template-compiler')

const platforms = require('./platforms')
const traverseScript = require('./script/traverse')
const generateScript = require('./script/generate')
const traverseTemplate = require('./template/traverse')
const generateTemplate = require('./template/generate')

const compilerModule = require('./module')

const generateCodeFrame = require('./codeframe')

module.exports = {
  compile (source, options = {}) {
    if (!options.mp) { // h5
      return compile(source, options)
    }

    (options.modules || (options.modules = [])).push(compilerModule)

    const res = compile(source, Object.assign(options, {
      optimize: false
    }))

    options.mp.platform = platforms[options.mp.platform]

    options.mp.scopeId = options.scopeId

    options.mp.resourcePath = options.resourcePath

    options.mp.globalUsingComponents = options.globalUsingComponents || Object.create(null)

    options.mp.filterModules = options.filterModules || []

    // (可用的原生微信小程序组件，global+scoped)
    options.mp.wxComponents = options.wxComponents || Object.create(null)

    const state = {
      ast: {},
      script: '',
      template: '',
      errors: new Set(),
      tips: new Set(),
      options: options.mp
    }
    // console.log(`function render(){${res.render}}`)
    const ast = parser.parse(`function render(){${res.render}}`)

    res.render = generateScript(traverseScript(ast, state), state)

    let template = generateTemplate(traverseTemplate(ast, state), state)

    res.specialMethods = state.options.specialMethods || new Set()
    delete state.options.specialMethods

    res.files = state.files || {}
    delete state.files

    // resolve scoped slots
    res.generic = state.generic || []
    delete state.generic

    // define scoped slots
    res.componentGenerics = state.componentGenerics || {}
    delete state.componentGenerics

    state.errors.forEach(msg => {
      res.errors.push({
        msg
      })
    })

    const resourcePath = options.resourcePath.replace(path.extname(options.resourcePath), '')

    state.tips.forEach(msg => {
      console.log(`提示：${msg}
at ${resourcePath}.vue:1`)
    })

    /**
         * TODO
         * 方案0.最佳方案是在 loader 中直接 emitFile，但目前 vue template-loader 不好介入,自定义的 compiler 结果又无法顺利返回给 loader
         * 方案1.通过 loader 传递 emitFile 来提交生成 wxml,需要一个 template loader 来给自定义 compier 增加 emitFile
         * 方案2.缓存 wxml 内容，由 plugin 生成 assets 来提交生成 wxml
         * ...暂时使用方案1
         */
    if (options.emitFile) {
      if (options.updateSpecialMethods) {
        options.updateSpecialMethods(resourcePath, [...res.specialMethods])
      }

      if (
        process.UNI_ENTRY[resourcePath] &&
                process.env.UNI_PLATFORM !== 'app-plus' &&
                process.env.UNI_PLATFORM !== 'h5'
      ) {
        // 检查是否启用 shadow
        let colorType = false
        const pageJsonStr = options.getJsonFile(resourcePath)
        if (pageJsonStr) {
          try {
            const windowJson = JSON.parse(pageJsonStr)
            if (process.env.UNI_PLATFORM === 'mp-alipay') {
              colorType = windowJson.allowsBounceVertical === 'NO' &&
                                windowJson.navigationBarShadow &&
                                windowJson.navigationBarShadow.colorType
            } else {
              colorType = windowJson.disableScroll &&
                                windowJson.navigationBarShadow &&
                                windowJson.navigationBarShadow.colorType
            }
          } catch (e) {}
        }
        if (colorType) {
          template = options.getShadowTemplate(colorType) + template
        }
      }

      options.emitFile(options.resourcePath, template)
      if (res.files) {
        Object.keys(res.files).forEach(name => {
          options.emitFile(name, res.files[name])
        })
      }

      if (state.options.usingGlobalComponents) {
        options.updateUsingGlobalComponents(
          resourcePath,
          state.options.usingGlobalComponents
        )
      }

      if (
        res.generic &&
                res.generic.length &&
                options.updateGenericComponents
      ) {
        options.updateGenericComponents(
          resourcePath,
          res.generic
        )
      }
      if (
        res.componentGenerics &&
                Object.keys(res.componentGenerics).length &&
                options.updateComponentGenerics
      ) {
        options.updateComponentGenerics(
          resourcePath,
          res.componentGenerics
        )
      }
    } else {
      res.template = template
    }
    return res
  },
  parseComponent,
  compileToFunctions,
  ssrCompile,
  ssrCompileToFunctions,
  generateCodeFrame
}