package discord

import (
	"context"
	"fmt"

	"gitea.dwysokinski.me/twhelp/dcbot/internal/domain"
	"github.com/bwmarrin/discordgo"
)

type groupCommand struct {
	svc GroupService
}

func (c *groupCommand) name() string {
	return "group"
}

func (c *groupCommand) register(s *discordgo.Session) error {
	var perm int64 = discordgo.PermissionAdministrator
	_, err := s.ApplicationCommandCreate(s.State.User.ID, "", &discordgo.ApplicationCommand{
		Name:                     c.name(),
		Description:              "Manages monitor groups on this server",
		DefaultMemberPermissions: &perm,
		Options: []*discordgo.ApplicationCommandOption{
			{
				Name:        "add",
				Description: "Adds a new monitor group",
				Type:        discordgo.ApplicationCommandOptionSubCommand,
			},
		},
	})
	if err != nil {
		return fmt.Errorf("s.ApplicationCommandCreate: %w", err)
	}
	s.AddHandler(c.handle)
	return nil
}

func (c *groupCommand) handle(s *discordgo.Session, i *discordgo.InteractionCreate) {
	cmdData := i.ApplicationCommandData()

	if cmdData.Name != c.name() {
		return
	}

	switch cmdData.Options[0].Name {
	case "add":
		c.handleAdd(s, i)
		return
	default:
	}
}

func (c *groupCommand) handleAdd(s *discordgo.Session, i *discordgo.InteractionCreate) {
	ctx := context.Background()

	params, err := domain.NewCreateGroupParams(i.GuildID)
	if err != nil {
		_ = s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
			Type: discordgo.InteractionResponseChannelMessageWithSource,
			Data: &discordgo.InteractionResponseData{
				Content: messageFromError(err),
			},
		})
		return
	}

	group, err := c.svc.Create(ctx, params)
	if err != nil {
		_ = s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
			Type: discordgo.InteractionResponseChannelMessageWithSource,
			Data: &discordgo.InteractionResponseData{
				Content: messageFromError(err),
			},
		})
		return
	}

	_ = s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
		Type: discordgo.InteractionResponseChannelMessageWithSource,
		Data: &discordgo.InteractionResponseData{
			Content: "group has been successfully added (id=" + group.ID + ")",
		},
	})
}