import path from "path"
import { PerfTimer } from "./perf"
import { rimraf } from "rimraf"
import { globby } from "globby"
import chalk from "chalk"
import http from "http"
import serveHandler from "serve-handler"
import { parseMarkdown } from "./processors/parse"
import { filterContent } from "./processors/filter"
import { emitContent } from "./processors/emit"
import cfg from "../quartz.config"

interface Argv {
  directory: string
  verbose: boolean
  output: string
  clean: boolean
  serve: boolean
  port: number
}

export default async function buildQuartz(argv: Argv, version: string) {
  console.log(chalk.bgGreen.black(`\n Quartz v${version} \n`))
  const perf = new PerfTimer()
  const output = argv.output

  if (argv.verbose) {
    const pluginCount = Object.values(cfg.plugins).flat().length
    const pluginNames = (key: 'transformers' | 'filters' | 'emitters') => cfg.plugins[key].map(plugin => plugin.name)
    console.log(`Loaded ${pluginCount} plugins`)
    console.log(`  Transformers: ${pluginNames('transformers').join(", ")}`)
    console.log(`  Filters: ${pluginNames('filters').join(", ")}`)
    console.log(`  Emitters: ${pluginNames('emitters').join(", ")}`)
  }

  // clean
  if (argv.clean) {
    perf.addEvent('clean')
    await rimraf(output)
    if (argv.verbose) {
      console.log(`Cleaned output directory \`${output}\` in ${perf.timeSince('clean')}`)
    }
  }

  // glob
  perf.addEvent('glob')
  const fps = await globby('**/*.md', {
    cwd: argv.directory,
    ignore: cfg.configuration.ignorePatterns,
    gitignore: true,
  })

  if (argv.verbose) {
    console.log(`Found ${fps.length} input files in ${perf.timeSince('glob')}`)

  }

  const filePaths = fps.map(fp => `${argv.directory}${path.sep}${fp}`)
  const parsedFiles = await parseMarkdown(cfg.plugins.transformers, argv.directory, filePaths, argv.verbose)
  const filteredContent = filterContent(cfg.plugins.filters, parsedFiles, argv.verbose)
  await emitContent(argv.directory, output, cfg, filteredContent, argv.verbose)
  console.log(chalk.green(`Done processing ${fps.length} files in ${perf.timeSince()}`))

  if (argv.serve) {
    const server = http.createServer(async (req, res) => {
      return serveHandler(req, res, {
        public: output,
        directoryListing: false
      })
    })
    server.listen(argv.port)
    console.log(`Started a Quartz server listening at http://localhost:${argv.port}`)
    console.log('hint: exit with ctrl+c')
  }
}