package commands

import (
	"context"
	"errors"
	"fmt"

	"github.com/disgoorg/disgo/discord"
	"github.com/disgoorg/disgo/events"

	"discord-music-bot/internal/music"
)

type SeekCommand struct {
	deps *Dependencies
}

func NewSeekCommand(deps *Dependencies) *SeekCommand {
	return &SeekCommand{deps: deps}
}

func (c *SeekCommand) Definition() discord.ApplicationCommandCreate {
	return discord.SlashCommandCreate{
		Name:        "seek",
		Description: "Jumps to a position in the current track",
		Options: []discord.ApplicationCommandOption{
			discord.ApplicationCommandOptionString{
				Name:        "position",
				Description: "Position to seek to: seconds, mm:ss or hh:mm:ss (e.g. 90 or 1:30)",
				Required:    true,
			},
		},
	}
}

func (c *SeekCommand) Execute(ctx context.Context, event *events.ApplicationCommandInteractionCreate) error {
	gid, err := requirePlaybackAccess(c.deps.Discord, event)
	if err != nil {
		return err
	}

	raw := event.SlashCommandInteractionData().String("position")
	position, err := parsePosition(raw)
	if err != nil {
		return rejectEphemeral(event, fmt.Sprintf("Invalid position %q: %s", raw, err))
	}

	if err := c.deps.Music.Guild(gid).Seek(ctx, position); err != nil {
		return replyWithError(event, seekErrorMessage(err), err)
	}
	return reply(event, fmt.Sprintf("Seeked to **%s**.", position))
}

func seekErrorMessage(err error) string {
	switch {
	case errors.Is(err, music.ErrNoTrackPlaying):
		return "Nothing is playing right now."
	case errors.Is(err, music.ErrStreamNotSeekable):
		return "Can't seek within a live stream."
	default:
		return "Could not seek."
	}
}