package web

import (
	"bufio"
	"bytes"
	"io"
	"mime/multipart"
	"regexp"
	"strings"
)

type CommandStat struct {
	Command string
	Count   int
}

func ProcessHistory(file multipart.File) (map[string]int, map[string]int, map[string]int, map[string]int) {
	commandCounts := make(map[string]int)
	categories := make(map[string]int)

	pipeRedirectionCounts := make(map[string]int)
	commonPatterns := make(map[string]int)
	re := regexp.MustCompile(`\S+\.(log|txt|conf|json)`)

	buf := bytes.NewBuffer(nil)
	if _, err := io.Copy(buf, file); err != nil {
		return nil, nil, nil, nil
	}

	// Reset the file pointer to the beginning (if needed)
	if seeker, ok := file.(multipart.File); ok {
		seeker.Seek(0, 0)
	}

	scanner := bufio.NewScanner(file)
	for scanner.Scan() {
		command := scanner.Text()
		if command == "" {
			continue
		}

		commandCounts[command]++

		if strings.Contains(command, "git") {
			categories["Git"]++
		} else if strings.Contains(command, "docker") {
			categories["Docker"]++
		} else if strings.Contains(command, "ssh") {
			categories["SSH"]++
		}

		if strings.Contains(command, "|") {
			pipeRedirectionCounts["pipe"]++
		}
		if strings.Contains(command, ">") || strings.Contains(command, "<") || strings.Contains(command, ">>") {
			pipeRedirectionCounts["redirection"]++
		}

		matches := re.FindAllString(command, -1)
		for _, match := range matches {
			commonPatterns[match]++
		}
	}

	return commandCounts, categories, pipeRedirectionCounts, commonPatterns
}

func GenerateStats(commandCounts map[string]int, categories map[string]int, commonPatterns map[string]int) map[string]interface{} {
	stats := map[string]interface{}{
		"topCommands":    commandCounts,
		"categories":     categories,
		"commonPatterns": commonPatterns,
	}
	return stats
}