phodal/adr

let fs = require('fs')

import { GenerateBuilder } from './base/GenerateBuilder'
import Config from './Config'
import { getI18n } from './helpers/i18n'

function buildGraphBuildFun (index, decision, file, bodyString, filesLength): string[] {
  bodyString[index] = '\n  _' + index + ' [label="' + index + '.' + decision + '"; URL="' + file.relativePath + '"]'
  if (index !== 1) {
    bodyString[filesLength + index] = '\n  _' + (index - 1) + ' -> _' + index + ' [style="dotted"];'
  }
  return bodyString
}

function buildTocBodyFun (index, decision, file, bodyString): string[] {
  bodyString[index] = '\n* [' + index + '. ' + decision + '](' + file.relativePath + ')'
  return bodyString
}

function buildAsciidocTocBodyFun (index, decision, file, bodyString): string[] {
  bodyString[index] = '\n* xref:' + file.relativePath + '[' + index + '. ' + decision + ']'
  return bodyString
}

function generateToc (options?: {output: boolean}) {
  let path = Config.getSavePath()
  let graphGenerate = new GenerateBuilder(path)
  let header = '# ' + getI18n().tocHeader + '\n'
  let results = graphGenerate
    .setStart(header)
    .setEnd('')
    .setBody(buildTocBodyFun)
    .build()

  if (options && options.output) {
    console.log(results)
  }
  return results
}

function generateAsciidocToc (options?: {output: boolean}) {
  let path = Config.getSavePath()
  let graphGenerate = new GenerateBuilder(path)
  let header = '.' + getI18n().tocHeader + '\n'
  let results = graphGenerate
    .setStart(header)
    .setEnd('')
    .setBody(buildAsciidocTocBodyFun)
    .build()

  if (options && options.output) {
    console.log(results)
  }
  return results
}

function generateGraph () {
  let path = Config.getSavePath()
  let graphGenerate = new GenerateBuilder(path)
  let header = 'digraph {\n  node [shape=plaintext];'
  let results = graphGenerate
    .setStart(header)
    .setEnd('\n}\n')
    .setBody(buildGraphBuildFun)
    .build()

  console.log(results)
  return results
}

export function generate (type, options?: {output: boolean}) {
  const fileExt = Config.getDocExtension()
  if (type === 'toc') {
    if (fileExt === 'adoc') {
      let toc = generateAsciidocToc(options)
      fs.writeFileSync(Config.getSavePath() + 'README.adoc', toc)
      return toc
    }
    let toc = generateToc(options)
    fs.writeFileSync(Config.getSavePath() + 'README.md', toc)
    return toc
  }
  if (type === 'graph') {
    return generateGraph()
  }

  let message = '\n error: type ' + type + ' current not supported'
  console.log(message)
  return message
}