package main

import (
	"context"
	"fmt"
	"log"
	"os"
	"os/signal"
	"syscall"
	"ticket-pimp/bot/handler"
	discordbot "ticket-pimp/discord-bot"
	"ticket-pimp/internal/domain"
	"ticket-pimp/internal/services"
	db "ticket-pimp/internal/storage/db/tickets"

	"github.com/jackc/pgx/v5"
	"github.com/joho/godotenv"
	"github.com/mr-linch/go-tg"
	"github.com/mr-linch/go-tg/tgb"
)

func main() {
	log.Print("started")
	config := env("develop.env")
	run(config)
}

func run(conf domain.Config) {
	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, os.Kill, syscall.SIGTERM)
	defer cancel()

	conn, err := pgx.Connect(
		ctx,
		fmt.Sprintf(
			"postgresql://%s:%s@%s:%s/%s",
			conf.DB.User,
			conf.DB.Pass,
			conf.DB.Host,
			conf.DB.Port,
			conf.DB.Name,
		))
	if err != nil {
		log.Fatalf("DB connection failed: %v", err)
	}
	defer conn.Close(ctx)

	opts := TelegramOptions{
		ticketsRepo:  db.New(conn),
		gitService:   services.NewGit(conf.Git),
		cloudService: services.NewCloud(conf.Cloud),
		coda:         services.NewCodaClient(conf.Coda),
		appConfig:    &conf,
	}

	go func() {
		if err := runDiscrodBot(conf); err != nil {
			log.Fatalf("discord bot cannot be runned: %v", err)
		}
	}()

	if err := runTgBot(ctx, opts); err != nil {
		log.Fatalf("telegram bot cannot be runned: %v", err)
		defer os.Exit(1)
	}
}

// env
// env function reads provided file and setup envirmental variables;
func env(envFilePath string) domain.Config {
	err := godotenv.Load(envFilePath)
	if err != nil {
		log.Fatal("Error while loading env file")
	}

	return domain.Config{
		Git: domain.GitConfig{
			BaseUrl: os.Getenv("GIT_BASE_URL"),
			Token:   os.Getenv("GIT_TOKEN"),
			User:    os.Getenv("GIT_USER"),
		},
		Cloud: domain.CloudConfig{
			BaseUrl: os.Getenv("CLOUD_BASE_URL"),
			User:    os.Getenv("CLOUD_USER"),
			Pass:    os.Getenv("CLOUD_PASS"),
			RootDir: os.Getenv("ROOTDIR"),
		},
		Coda: domain.CodaConfig{
			Farm:    os.Getenv("CODA_TOKEN1"),
			Develop: os.Getenv("CODA_TOKEN2"),
		},
		DB: domain.DBConfig{
			Host:    os.Getenv("DB_HOST"),
			Port:    os.Getenv("DB_PORT"),
			Name:    os.Getenv("DB_NAME"),
			User:    os.Getenv("DB_USER"),
			Pass:    os.Getenv("DB_PASS"),
			SslMode: os.Getenv("SSLMODE"),
		},
		Telegram: domain.TelegramConfig{
			Token: os.Getenv("TG_API"),
		},
		Discord: domain.DiscordConfig{
			Token: os.Getenv("DISCORD_TOKEN"),
		},
	}
}

func runDiscrodBot(conf domain.Config) error {
	token := conf.Discord.Token

	dbot, err := discordbot.NewDiscordBot(token)
	if err != nil {
		return err
	}

	createRepoHandler := discordbot.CreateRepoHandler(3)

	dbot.Session.AddHandler(createRepoHandler.Handler)

	if err := dbot.Session.Open(); err != nil {
		return fmt.Errorf("cannot open the session: %v", err)
	}

	log.Println("Adding commands...")
	cmd, err := dbot.Session.ApplicationCommandCreate(dbot.Session.State.User.ID, "", &createRepoHandler.Command)
	if err != nil {
		log.Panicf("Cannot create '%v' command: %v", createRepoHandler.Command.Name, err)
	}

	defer dbot.Session.Close()
	stop := make(chan os.Signal, 1)
	signal.Notify(stop, os.Interrupt)
	<-stop
	log.Println("Graceful shutdown")

	log.Println("Removing commands...")
	err = dbot.Session.ApplicationCommandDelete(dbot.Session.State.User.ID, "", cmd.ID)
	if err != nil {
		log.Panicf("Cannot delete '%v' command: %v", cmd.Name, err)
	}

	return nil
}

type TelegramOptions struct {
	ticketsRepo  *db.Queries
	gitService   *services.Git
	cloudService *services.Cloud
	coda         *services.Coda
	appConfig    *domain.Config
}

// runTgBot ...
// ..function creates new Telegram BOT instance
// ..throw env variables through bot's handlers
// ..setup tg bot router;
// and finally returns tgb.Poller
func runTgBot(ctx context.Context, opts TelegramOptions) error {

	log.Print("Start telegram bot init..")
	client := tg.New(opts.appConfig.Telegram.Token)

	h := handler.NewHandler(
		opts.gitService,
		opts.cloudService,
		opts.coda,
		opts.ticketsRepo,
	)

	router := tgb.NewRouter().
		Message(h.Init, tgb.Command("init")).
		Message(h.PingHandler, tgb.Command("ping")).
		Message(h.DevelopmentTaskHandler, tgb.TextHasPrefix("/new")).
		Message(h.NewRepoHandler, tgb.TextHasPrefix("/repo")).
		Message(h.NewFolderHandler, tgb.TextHasPrefix("/folder")).
		Message(h.FarmTaskHandler, tgb.TextHasPrefix("/task"))

	return tgb.NewPoller(
		router,
		client,
	).Run(ctx)
}