import packageJson from '../../../../package.json'

export function help({ message, usage, commands, options }) {
  let indent = 2

  // Render header
  console.log()
  console.log(`${packageJson.name} v${packageJson.version}`)

  // Render message
  if (message) {
    console.log()
    for (let msg of message.split('\n')) {
      console.log(msg)
    }
  }

  // Render usage
  if (usage && usage.length > 0) {
    console.log()
    console.log('Usage:')
    for (let example of usage) {
      console.log(' '.repeat(indent), example)
    }
  }

  // Render commands
  if (commands && commands.length > 0) {
    console.log()
    console.log('Commands:')
    for (let command of commands) {
      console.log(' '.repeat(indent), command)
    }
  }

  // Render options
  if (options) {
    let groupedOptions = {}
    for (let [key, value] of Object.entries(options)) {
      if (typeof value === 'object') {
        groupedOptions[key] = { ...value, flags: [key] }
      } else {
        groupedOptions[value].flags.push(key)
      }
    }

    console.log()
    console.log('Options:')
    for (let { flags, description, deprecated } of Object.values(groupedOptions)) {
      if (deprecated) continue

      if (flags.length === 1) {
        console.log(
          ' '.repeat(indent + 4 /* 4 = "-i, ".length */),
          flags.slice().reverse().join(', ').padEnd(20, ' '),
          description
        )
      } else {
        console.log(
          ' '.repeat(indent),
          flags.slice().reverse().join(', ').padEnd(24, ' '),
          description
        )
      }
    }
  }

  console.log()
}