package music

import (
	"strings"

	"github.com/bwmarrin/discordgo"
)

func HandleComponent(s *discordgo.Session, i *discordgo.InteractionCreate) {
	// DJ role is required for all music controls.
	if !memberHasDJRoleForComponents(s, i.GuildID, i.Member) {
		_ = s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
			Type: discordgo.InteractionResponseChannelMessageWithSource,
			Data: &discordgo.InteractionResponseData{
				Content: "You need the **DJ** role to use music commands.",
				Flags:   discordgo.MessageFlagsEphemeral,
			},
		})
		return
	}

	customID := i.MessageComponentData().CustomID
	parts := strings.Split(customID, ":")
	if len(parts) < 2 {
		return
	}

	action := parts[1]
	guildID := i.GuildID

	// Ignore controls from old now-playing messages
	currentMsgID := CurrentNowPlayingMessageID(guildID)
	if currentMsgID != "" && i.Message != nil && i.Message.ID != currentMsgID {
		_ = s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
			Type: discordgo.InteractionResponseChannelMessageWithSource,
			Data: &discordgo.InteractionResponseData{
				Content: "These controls are outdated.",
				Flags:   discordgo.MessageFlagsEphemeral,
			},
		})
		return
	}

	// Acknowledge immediately to avoid "This interaction failed".
	_ = s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
		Type: discordgo.InteractionResponseDeferredMessageUpdate,
	})

	var err error
	content := ""

	switch action {
	case "pause":
		err = Pause(guildID, true)
		content = "Paused."
	case "resume":
		err = Pause(guildID, false)
		content = "Resumed."
	case "toggle_pause":
		paused, _ := pausedAndVolume(guildID)
		err = Pause(guildID, !paused)
		if paused {
			content = "Resumed."
		} else {
			content = "Paused."
		}
		updateNowPlayingButtons(i.ChannelID, i.Message.ID, guildID)
	case "skip":
		err = Skip(guildID)
		content = "Skipped."
	case "stop":
		err = Stop(guildID)
		content = "Stopped."
	case "repeat_song":
		rs, rq := ToggleRepeatSong(guildID)
		_ = rs
		_ = rq
		updateNowPlayingButtons(i.ChannelID, i.Message.ID, guildID)
		if rs {
			content = "Repeat song enabled."
		} else {
			content = "Repeat song disabled."
		}
	case "repeat_queue":
		rs, rq := ToggleRepeatQueue(guildID)
		_ = rs
		_ = rq
		updateNowPlayingButtons(i.ChannelID, i.Message.ID, guildID)
		if rq {
			content = "Repeat queue enabled."
		} else {
			content = "Repeat queue disabled."
		}
	}

	if content == "" {
		content = "Done."
	}
	if err != nil {
		content = "Error: " + err.Error()
	}

	// send ephemeral confirmation
	_, _ = s.FollowupMessageCreate(i.Interaction, true, &discordgo.WebhookParams{
		Content: content,
		Flags:   discordgo.MessageFlagsEphemeral,
	})
}