package cmd

import (
	"fmt"
	"github.com/eiannone/keyboard"
	"sync"
	"time"
)

type Log struct {
	Level   string
	Message string
	Time    string
	Source  string
}

type LoggerQueue struct {
	queue        chan Log
	currentInput string
}

var Logger = &LoggerQueue{
	queue: make(chan Log, 100),
}

func (l *LoggerQueue) log(level string, message string, source string) {
	l.queue <- Log{
		Level:   level,
		Message: message,
		Time:    time.Now().Format("2006/01/02 15:04:05"),
		Source:  source,
	}
}

func (l *LoggerQueue) Info(message string) {
	l.log("INFO", message, "")
}

func (l *LoggerQueue) Warning(message string) {
	l.log("WARNING", message, "")
}

func (l *LoggerQueue) Error(message string) {
	l.log("ERROR", message, "")
}

func (l *LoggerQueue) processLogs(stopChan chan struct{}) {
	ticker := time.NewTicker(100 * time.Millisecond)
	defer ticker.Stop()

	for {
		select {
		case logEntry := <-l.queue:
			displayLog(logEntry)
		case <-stopChan:
			fmt.Print("\033[2K\r")
			println("Stopping")
			return
		case <-ticker.C:
			refreshInputDisplay(l.currentInput)
		}
	}
}

func displayLog(logEntry Log) {
	fmt.Printf("\033[2K\r%s [%s]: %s\n", logEntry.Time, logEntry.Level, logEntry.Message)
	fmt.Print("> ")
}

func refreshInputDisplay(input string) {
	fmt.Print("\033[2K\r> " + input)
}

func Start(wg *sync.WaitGroup, stopChan chan struct{}) {
	defer wg.Done()

	if err := keyboard.Open(); err != nil {
		panic(err)
	}
	defer func() {
		go keyboard.Close()
	}()

	go Logger.processLogs(stopChan)

	input := ""
	for {
		char, key, err := keyboard.GetKey()
		if err != nil {
			Logger.Error(fmt.Sprintf("Keyboard error: %v", err))
			break
		}

		switch {
		case key == keyboard.KeyEnter:
			switch input {
			case "":
				// Do nothing
			case "stop":
				Logger.Info("Received stop command.")
				close(stopChan)
				return
			default:
				Logger.Info(fmt.Sprintf("Unknown command: %s", input))

			}
			input = ""
		case key == keyboard.KeyBackspace || key == keyboard.KeyBackspace2:
			if len(input) > 0 {
				input = input[:len(input)-1]
			}
		case key == keyboard.KeySpace:
			input += " "
		case key == keyboard.KeyCtrlC:
			Logger.Info("Received stop command.")
			close(stopChan)
			return
		case char != 0:
			input += string(char)
		}
		Logger.currentInput = input // Update stored user input
	}
}