package app

import (
	"finally-a-monolithic-linux-hw-monitor/app/mem"
	"finally-a-monolithic-linux-hw-monitor/app/proc"
	"fmt"
	"os"
	"os/signal"
	"strings"
	"syscall"
	"time"
)

func Run() {
	// Clear terminal screen and hide cursor
	fmt.Print("\033[2J\033[?25l")

	// Ensure cursor is restored when exiting (Ctrl+C / SIGTERM)
	cleanupChannel := make(chan os.Signal, 1)
	signal.Notify(cleanupChannel, os.Interrupt, syscall.SIGTERM)
	go func() {
		<-cleanupChannel
		// Restore cursor and move below output
		fmt.Print("\033[?25h\n")
		os.Exit(0)
	}()

	proc, _ := proc.GetProc()
	mem, _ := mem.GetMem()

	ticker := time.NewTicker(1 * time.Second)
	defer ticker.Stop()
	for {
		console := &strings.Builder{}
		// Move cursor to top-left (0,0) without clearing full buffer (flicker-free)
		fmt.Fprint(console, "\033[H")

		proc.RenderProc(console)
		mem.Render(console)

		fmt.Fprint(console, "\nPress Ctrl+C to exit.\033[K\n")
		fmt.Fprint(console, "\033[0J")
		fmt.Print(console.String())

		<-ticker.C
	}

}