package cmd

import (
	"context"
	"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(ctx context.Context) {
	ticker := time.NewTicker(100 * time.Millisecond)
	defer ticker.Stop()

	for {
		select {
		case logEntry := <-l.queue:
			displayLog(logEntry)
		case <-ctx.Done():
			fmt.Print("\033[2K\r")
			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 Run(baseCtx context.Context) {
	ctx, cancel := context.WithCancel(baseCtx)
	defer cancel()

	input := ""
	event, err := keyboard.GetKeys(10)
	if err != nil {
		Logger.Error(fmt.Sprintf("Keyboard error: %v", err))
		return
	}

	var wg sync.WaitGroup

	wg.Add(1)
	go func() {
		defer wg.Done()

		Logger.processLogs(ctx)
	}()
loop:
	for {
		select {
		case <-ctx.Done():
			cancel()
			break loop
		case event := <-event:
			if event.Rune != 0 {
				input += string(event.Rune)
			}
			switch event.Key {
			case keyboard.KeyEnter:
				switch input {
				case "":
					// Do nothing
				case "stop":
					Logger.Info("Received stop command.")
					cancel()
					break loop
				default:
					Logger.Info(fmt.Sprintf("Unknown command: %s", input))
				}
				input = ""
			case keyboard.KeyBackspace | keyboard.KeyBackspace2:
				if len(input) > 0 {
					input = input[:len(input)-1]
				}
			case keyboard.KeySpace:
				input += " "
			case keyboard.KeyCtrlC:
				Logger.Info("Received stop command.")
				cancel()
				break loop
			}
			Logger.currentInput = input // Update stored user input
		}
	}

	wg.Wait()
}