package util

import (
	"bufio"
	"bytes"
	"fmt"
	"html/template"
	"io"
	"os"
	"strings"

	"git.andreafazzi.eu/andrea/probo/embed"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/glamour"
)

func RenderMarkdownTemplates(paths ...string) string {
	tmpl, err := template.ParseFS(embed.CLI, paths...)
	if err != nil {
		panic(err)
	}

	var buf bytes.Buffer

	err = tmpl.Execute(&buf, nil)
	if err != nil {
		panic(err)
	}

	result, err := glamour.Render(buf.String(), "dark")
	if err != nil {
		panic(err)
	}

	return result
}

func LogToFile() *os.File {
	if len(os.Getenv("DEBUG")) > 0 {
		f, err := tea.LogToFile("probo-debug.log", "[DEBUG]")
		if err != nil {
			fmt.Println("fatal:", err)
			os.Exit(1)
		}
		return f
	}
	return nil
}

func ReadStdin() string {
	var b strings.Builder

	stat, err := os.Stdin.Stat()
	if err != nil {
		panic(err)
	}

	if stat.Mode()&os.ModeNamedPipe != 0 || stat.Size() != 0 {
		reader := bufio.NewReader(os.Stdin)
		for {
			r, _, err := reader.ReadRune()
			if err != nil && err == io.EOF {
				break
			}
			_, err = b.WriteRune(r)
			if err != nil {
				fmt.Println("Error getting input:", err)
				os.Exit(1)
			}
		}
	}

	return strings.TrimSpace(b.String())
}