package main

import (
	"context"
	"crypto/rand"
	"encoding/base64"
	"flag"
	"fmt"
	"log/slog"
	"os"
	"os/signal"
	"time"

	"github.com/alecthomas/chroma/v2/styles"
	"golang.org/x/crypto/bcrypt"

	"git.gabrielgio.me/cerrado/pkg/config"
	"git.gabrielgio.me/cerrado/pkg/handler"
	"git.gabrielgio.me/cerrado/pkg/service"
	"git.gabrielgio.me/cerrado/pkg/worker"
)

func main() {
	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, os.Kill)
	defer stop()

	if len(os.Args) == 4 && os.Args[1] == "hash" {
		err := hash(os.Args[2], os.Args[3])
		if err != nil {
			slog.Error("Hash", "error", err)
			os.Exit(1)
		}
		return
	}

	if len(os.Args) == 2 && os.Args[1] == "key" {
		err := key()
		if err != nil {
			slog.Error("Key", "error", err)
			os.Exit(1)
		}
		return
	}

	if err := run(ctx); err != nil {
		slog.Error("Server", "error", err)
		os.Exit(1)
	}
}

func hash(username string, password string) error {
	passphrase := fmt.Sprintf("%s:%s", username, password)
	bytes, err := bcrypt.GenerateFromPassword([]byte(passphrase), 14)
	if err != nil {
		return err
	}
	fmt.Println(string(bytes))
	return nil
}

func key() error {
	key := make([]byte, 64)

	_, err := rand.Read(key)
	if err != nil {
		return err
	}

	en := base64.StdEncoding.EncodeToString(key)
	fmt.Println(en)
	return nil
}

func run(ctx context.Context) error {
	configPath := flag.String("config", "/etc/cerrado.scfg", "File path for the configuration file")

	flag.Parse()

	// repositorie
	configRepo, err := config.LoadConfigurationRepository(*configPath)
	if err != nil {
		return err
	}

	// checking chroma configurationo

	if _, ok := styles.Registry[configRepo.GetSyntaxHighlight()]; !ok {
		slog.Warn(
			"Invalid Syntax highlight selected",
			"invalid-style", configRepo.GetSyntaxHighlight(),
			"using", "monokailight",
		)
		styles.Fallback = styles.Registry["monokailight"]
	}

	// services
	gitService := service.NewGitService(configRepo)

	handler, err := handler.MountHandler(gitService, configRepo)
	if err != nil {
		return err
	}

	serverTask := worker.NewServerTask(configRepo.GetListenAddr(), handler)

	pool := worker.NewTaskPool()
	pool.AddTask("http-server", 5*time.Second, serverTask)

	return pool.Start(ctx)
}