package cmd

import (
	"bytes"
	"fmt"
	"os"
	"path/filepath"
	"strings"

	"github.com/alecthomas/chroma/v2/formatters"
	"github.com/alecthomas/chroma/v2/lexers"
	"github.com/alecthomas/chroma/v2/styles"
	"github.com/zemenawi/zutils/pkg/colors"
	"github.com/zemenawi/zutils/pkg/formatter"
)

func ReadCommand(args []string) error {
	if len(args) < 1 {
		return fmt.Errorf("please specify a file path")
	}

	filePath := args[0]

	file, err := os.Open(filePath)
	if err != nil {
		return fmt.Errorf("error opening file: %w", err)
	}
	defer file.Close()

	fileInfo, err := file.Stat()
	if err != nil {
		return fmt.Errorf("error getting file info: %w", err)
	}

	if fileInfo.IsDir() {
		return fmt.Errorf("'%s' is a directory, not a readable file", filePath)
	}

	content := formatter.ReadFileContent(file)

	lexer := lexers.Match(filepath.Base(filePath))
	if lexer == nil {
		lexer = lexers.Fallback
	}

	iterator, err := lexer.Tokenise(nil, content)
	if err != nil {
		return fmt.Errorf("error tokenizing: %w", err)
	}

	formatter_ := formatters.TTY256
	style := styles.Get("monokai")
	if style == nil {
		style = styles.Fallback
	}

	fmt.Printf("%s%s╔══════════════════════════════════════╗%s\n", colors.Cyan, colors.Bold, colors.Reset)
	fmt.Printf("%s%s║%s %-38s %s%s║%s\n", colors.Cyan, colors.Bold, colors.Reset, filePath, colors.Cyan, colors.Bold, colors.Reset)
	fmt.Printf("%s%s╚══════════════════════════════════════╝%s\n", colors.Cyan, colors.Bold, colors.Reset)
	fmt.Println()

	var buf bytes.Buffer
	err = formatter_.Format(&buf, style, iterator)
	if err != nil {
		return fmt.Errorf("error formatting: %w", err)
	}

	lines := strings.Split(buf.String(), "\n")
	for i, line := range lines {
		if line != "" {
			fmt.Printf("%s%4d: %s%s\n", colors.Gray, i+1, colors.Reset, line)
		}
	}

	return nil
}