package shared

import (
	"fmt"
	"strconv"
	"time"

	"velox-bot/internal/db/services"

	"github.com/bwmarrin/discordgo"
)

var scheduleDatetimeLayouts = []string{
	"2006-01-02 15:04",
	"2006-01-02T15:04",
	"2006-01-02 15:04:05",
	"01/02/2006 15:04",
}

func RespondEphemeral(s *discordgo.Session, i *discordgo.InteractionCreate, msg string) {
	_ = s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
		Type: discordgo.InteractionResponseChannelMessageWithSource,
		Data: &discordgo.InteractionResponseData{
			Content: msg,
			Flags:   discordgo.MessageFlagsEphemeral,
		},
	})
}

func ParseScheduleDatetime(input string, loc *time.Location) (time.Time, error) {
	for _, layout := range scheduleDatetimeLayouts {
		if t, err := time.ParseInLocation(layout, input, loc); err == nil {
			return t, nil
		}
	}
	return time.Time{}, fmt.Errorf("invalid schedule datetime format")
}

func RequireGuild(s *discordgo.Session, i *discordgo.InteractionCreate) bool {
	if i.GuildID == "" {
		RespondEphemeral(s, i, "This command can only be used in a server.")
		return false
	}
	return true
}

func RequireScheduleService(s *discordgo.Session, i *discordgo.InteractionCreate) bool {
	if services.Global == nil || services.Global.Schedule == nil {
		RespondEphemeral(s, i, "Scheduling service is not available.")
		return false
	}
	return true
}

func ParseGuildID(s *discordgo.Session, i *discordgo.InteractionCreate) (int64, bool) {
	guildID, err := strconv.ParseInt(i.GuildID, 10, 64)
	if err != nil {
		RespondEphemeral(s, i, "Invalid guild ID.")
		return 0, false
	}
	return guildID, true
}