package cli

import (
	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api"
	"strings"
)

type CommandManager struct {
	Commands []Command
	Bot      *tgbotapi.BotAPI
}

func (cm CommandManager) ExecuteUpdate(update *tgbotapi.Update) (bool, error) {
	if update.Message == nil {
		return true, nil
	}

	if update.Message.Text == "" {
		return true, nil
	}

	cmdStr := update.Message.Text

	if !strings.HasPrefix(cmdStr, "/") {
		return true, nil
	}

	var command Command

	for _, cmd := range cm.Commands {
		if strings.HasPrefix(cmdStr, cmd.GetCommand()) {
			command = cmd
			break
		}
	}

	if command == nil {
		return true, nil
	}

	if !command.AllowChatType(update.Message.Chat) {
		return true, nil
	}

	if !command.AllowEveryMember() {
		userconfig := tgbotapi.ChatConfigWithUser{
			ChatID: update.Message.Chat.ID,
			UserID: update.Message.From.ID,
		}

		member, _ := cm.Bot.GetChatMember(userconfig)

		if !command.AllowMember(&member) {
			msg := tgbotapi.NewMessage(update.Message.Chat.ID, "You are not allowed to use this command.")
			msg.ReplyToMessageID = update.Message.MessageID
			_, err := cm.Bot.Send(msg)
			if err != nil {
				return false, err
			}
			return true, nil
		}
	}

	return command.ExecuteCommand(cm.Bot, update)
}

func (cm *CommandManager) RegisterCommand(command Command) {
	if cm.Commands == nil {
		cm.Commands = make([]Command, 0)
	}

	cm.Commands = append(cm.Commands, command)
}