const fs = require('fs')
const path = require('path')

const loaderUtils = require('loader-utils')

const {
  parsePages,
  normalizePath,
  parsePagesJson,
  parseManifestJson
} = require('@dcloudio/uni-cli-shared')

const {
  updateAppJson,
  updatePageJson,
  updateProjectJson
} = require('@dcloudio/uni-cli-shared/lib/cache')

const {
  // pagesJsonJsFileName,
  initAutoImportComponents
} = require('@dcloudio/uni-cli-shared/lib/pages')

const parseStyle = require('./util').parseStyle

// 将开发者手动设置的 usingComponents 调整名称，方便与自动解析到的 usingComponents 做最后合并
function renameUsingComponents (jsonObj) {
  if (jsonObj.usingComponents) {
    jsonObj.customUsingComponents = jsonObj.usingComponents
    delete jsonObj.usingComponents
  }
  return jsonObj
}

module.exports = function (content) {
  this.cacheable && this.cacheable()

  let isAppView = false
  if (this.resourceQuery) {
    const params = loaderUtils.parseQuery(this.resourceQuery)
    isAppView = params.type === 'view'
  }

  // const pagesJsonJsPath = path.resolve(process.env.UNI_INPUT_DIR, pagesJsonJsFileName)
  const manifestJsonPath = path.resolve(process.env.UNI_INPUT_DIR, 'manifest.json')
  const manifestJson = parseManifestJson(fs.readFileSync(manifestJsonPath, 'utf8'))

  // this.addDependency(pagesJsonJsPath)
  this.addDependency(manifestJsonPath)

  const pagesJson = parsePagesJson(content, {
    addDependency: (file) => {
      (process.UNI_PAGES_DEPS || (process.UNI_PAGES_DEPS = new Set())).add(normalizePath(file))
      this.addDependency(file)
    }
  })

  // 组件自动导入配置
  process.UNI_AUTO_SCAN_COMPONENTS = !(pagesJson.easycom && pagesJson.easycom.autoscan === false)
  initAutoImportComponents(pagesJson.easycom)

  // TODO 与 usingComponents 放在一块读取设置
  if (manifestJson.transformPx === false) {
    process.UNI_TRANSFORM_PX = false
  } else {
    process.UNI_TRANSFORM_PX = true
  }

  if (process.env.UNI_PLATFORM === 'h5') {
    return require('./platforms/h5')(pagesJson, manifestJson)
  }

  if (!process.env.UNI_USING_V3) {
    parsePages(pagesJson, function (page) {
      updatePageJson(page.path, renameUsingComponents(parseStyle(page.style)))
    }, function (root, page) {
      updatePageJson(normalizePath(path.join(root, page.path)), renameUsingComponents(
        parseStyle(page.style, root)
      ))
    })
  }

  const jsonFiles = require('./platforms/' + process.env.UNI_PLATFORM)(pagesJson, manifestJson)

  if (jsonFiles && jsonFiles.length) {
    if (process.env.UNI_USING_V3) {
      let appConfigContent = ''
      jsonFiles.forEach(jsonFile => {
        if (jsonFile) {
          if (!isAppView && jsonFile.name === 'manifest.json') {
            const content = JSON.parse(jsonFile.content)
            if (!content.launch_path && content.plus['uni-app'].nvueLaunchMode === 'fast') {
              console.log('Nvue 首页启动模式: fast 详见: https://ask.dcloud.net.cn/article/36749')
            }
          }
          if (jsonFile.name === 'define-pages.js') {
            appConfigContent = jsonFile.content
          } else {
            // app-view 不需要生成 app-config-service.js,manifest.json
            !isAppView && this.emitFile(jsonFile.name, jsonFile.content)
          }
        }
      })
      return appConfigContent
    }
    if (process.env.UNI_USING_NATIVE) {
      let appConfigContent = ''
      jsonFiles.forEach(jsonFile => {
        if (jsonFile) {
          if (jsonFile.name === 'app-config.js') {
            appConfigContent = jsonFile.content
          } else {
            this.emitFile(jsonFile.name, jsonFile.content)
          }
        }
      })
      return appConfigContent
    }

    jsonFiles.forEach(jsonFile => {
      if (jsonFile) {
        if (jsonFile.name === 'app') {
          updateAppJson(jsonFile.name, renameUsingComponents(jsonFile.content))
        } else {
          updateProjectJson(jsonFile.name, jsonFile.content)
        }
      }
    })
  }

  return ''
}