import colors from "picocolors"
import readline from "readline"

const prefix = "[@medusajs/admin]"

type LogType = "error" | "warn" | "info"

interface LogOptions {
  clearScreen?: boolean
}

interface LogErrorOptions extends LogOptions {
  error?: Error | null
}

interface Logger {
  info(msg: string, options?: LogOptions): void
  warn(msg: string, options?: LogOptions): void
  error(msg: string, options?: LogErrorOptions): void
  panic(msg: string, options?: LogErrorOptions): void
}

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)
}

const canClearScreen = process.stdout.isTTY && !process.env.CI
const clear = canClearScreen
  ? clearScreen
  : () => {
      // noop
    }

function createLogger(): Logger {
  const output = (type: LogType, msg: string, options?: LogErrorOptions) => {
    const method = type === "info" ? "log" : type
    const format = () => {
      const tag =
        type === "info"
          ? colors.cyan(colors.bold(prefix))
          : type === "warn"
          ? colors.yellow(colors.bold(prefix))
          : colors.red(colors.bold(prefix))
      return `${colors.dim(new Date().toLocaleTimeString())} ${tag} ${msg}`
    }

    if (options?.clearScreen) {
      clear()
    }

    console[method](format())

    if (options?.error) {
      console.error(options.error)
    }
  }

  return {
    info: (msg, options) => output("info", msg, options),
    warn: (msg, options) => output("warn", msg, options),
    error: (msg, options) => output("error", msg, options),
    panic: (msg, options) => {
      output("error", msg, options)
      output("error", "Exiting process", {})
      process.exit(1)
    },
  }
}

export const logger = createLogger()