/**
 Copy from https://github.com/vitejs/vite/blob/main/packages/vite/src/node/logger.ts

 The MIT License (MIT)

 Copyright (c) 2019-present, Yuxi (Evan) You and Vite contributors

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
*/

/* eslint no-console: 0 */
import readline from 'readline'
import os from 'os'
import chalk from 'chalk'
import { Hostname } from './utils'

export interface LogOptions {
  clear?: boolean
  timestamp?: boolean
}
export type LogType = 'error' | 'warn' | 'info'
export type LogLevel = LogType | 'silent'
export interface Logger {
  info(msg: string, options?: LogOptions): void
  warn(msg: string, options?: LogOptions): void
  warnOnce(msg: string, options?: LogOptions): void
  error(msg: string, options?: LogOptions): void
  clearScreen(type: LogType): void
  hasWarned: boolean
}

export const LogLevels: Record<LogLevel, number> = {
  silent: 0,
  error: 1,
  warn: 2,
  info: 3
}

let lastType: LogType | undefined
let lastMsg: string | undefined
let sameCount = 0

function clearScreen() {
  const repeatCount = process.stdout.rows - 2
  const blank = repeatCount > 0 ? '\n'.repeat(repeatCount) : ''
  console.log(blank)
  readline.cursorTo(process.stdout, 0, 0)
  readline.clearScreenDown(process.stdout)
}

export interface LoggerOptions {
  prefix?: string
  allowClearScreen?: boolean
}

export function createLogger(
  level: LogLevel = 'info',
  options: LoggerOptions = {}
): Logger {
  const { prefix = '[einfalt]', allowClearScreen = true } = options

  const thresh = LogLevels[level]
  const clear
    = allowClearScreen && process.stdout.isTTY && !process.env.CI
      ? clearScreen
      : () => {}

  function output(type: LogType, msg: string, options: LogOptions = {}) {
    if (thresh >= LogLevels[type]) {
      const method = type === 'info' ? 'log' : type
      const format = () => {
        if (options.timestamp) {
          const tag
            = type === 'info'
              ? chalk.cyan.bold(prefix)
              : type === 'warn'
                ? chalk.yellow.bold(prefix)
                : chalk.red.bold(prefix)
          return `${chalk.dim(new Date().toLocaleTimeString())} ${tag} ${msg}`
        } else {
          return msg
        }
      }
      if (type === lastType && msg === lastMsg) {
        sameCount++
        clear()
        console[method](format(), chalk.yellow(`(x${sameCount + 1})`))
      } else {
        sameCount = 0
        lastMsg = msg
        lastType = type
        if (options.clear) {
          clear()
        }
        console[method](format())
      }
    }
  }

  const warnedMessages = new Set<string>()

  const logger: Logger = {
    hasWarned: false,
    info(msg, opts) {
      output('info', msg, opts)
    },
    warn(msg, opts) {
      logger.hasWarned = true
      output('warn', msg, opts)
    },
    warnOnce(msg, opts) {
      if (warnedMessages.has(msg)) { return }
      logger.hasWarned = true
      output('warn', msg, opts)
      warnedMessages.add(msg)
    },
    error(msg, opts) {
      logger.hasWarned = true
      output('error', msg, opts)
    },
    clearScreen(type) {
      if (thresh >= LogLevels[type]) {
        clear()
      }
    }
  }

  return logger
}

export function printServerUrls(
  hostname: Hostname,
  protocol: string,
  port: number,
  info: Logger['info']
): void {
  if (hostname.host === '127.0.0.1') {
    const url = `${protocol}://${hostname.name}:${chalk.bold(port)}`
    info(`  > Local: ${chalk.cyan(url)}`)
    if (hostname.name !== '127.0.0.1') {
      info(`  > Network: ${chalk.dim('use `--host` to expose')}`)
    }
  } else {
    Object.values(os.networkInterfaces())
      .flatMap(nInterface => nInterface ?? [])
      .filter(detail => detail.family === 'IPv4')
      .map((detail) => {
        const type = detail.address.includes('127.0.0.1')
          ? 'Local:   '
          : 'Network: '
        const host = detail.address.replace('127.0.0.1', hostname.name)
        const url = `${protocol}://${host}:${chalk.bold(port)}`
        return `  > ${type} ${chalk.cyan(url)}`
      })
      .forEach(msg => info(msg))
  }
}