package discord

import (
	"fmt"
	"strings"
	"time"

	"github.com/bwmarrin/discordgo"
	"go.jolheiser.com/beaver"
	"go.jolheiser.com/gojang"
	"go.jolheiser.com/gojang/rate"
)

func init() {
	commands = append(commands, &command{
		name:    "history",
		aliases: []string{"names"},
		validate: func(cmd commandInit) bool {
			return true
		},
		run: func(cmd commandInit) (string, error) {
			args := strings.Fields(cmd.message.Content)
			if len(args) < 2 {
				return "You must give this command a Minecraft username", nil
			}

			sendTyping(cmd.session, cmd.message.ChannelID)

			at := time.Now()
			if len(args) > 2 {
				t, err := time.Parse("01/02/2006", args[2])
				if err != nil {
					return `Could not parse the time. Use the format 01/30/2006`, nil
				}
				at = t
			}

			client := gojang.New(time.Second * 5)
			profile, err := client.Profile(args[1], at)
			if err != nil {
				if gojang.IsPlayerNotFoundError(err) {
					return "Could not find a player with that username at that time.", nil
				}
				if rate.IsRateLimitExceededError(err) {
					return "Rate limited by Mojang, slow down!", nil
				}
				beaver.Errorf("Profile: %v", err)
				return "Could not contact the Mojang API.", nil
			}

			names, err := client.UUIDToNameHistory(profile.UUID)
			if err != nil {
				beaver.Errorf("UUIDToNameHistory: %v", err)
				return "Could not contact the Mojang API.", nil
			}

			var history string
			for _, name := range names {
				cleaned := strings.NewReplacer("_", "\\_", "*", "\\*").Replace(name.Name)
				history += fmt.Sprintf("\n%s", cleaned)
				if name.ChangedToAt == 0 {
					history += " (original)"
				} else {
					history += fmt.Sprintf(" (%s)", name.ChangedToAtTime().Format("01/02/2006"))
				}
			}

			embed := &discordgo.MessageEmbed{
				Color: 0x7ed321,
				Thumbnail: &discordgo.MessageEmbedThumbnail{
					URL: fmt.Sprintf("https://minotar.net/helm/%s/100.png", names.Current().Name),
				},
				Fields: []*discordgo.MessageEmbedField{
					{
						Name:  fmt.Sprintf("%s's Name History", names.Current().Name),
						Value: history,
					},
				},
			}
			sendEmbed(cmd.session, cmd.message.ChannelID, embed)
			return "", nil
		},
		help: "Minecraft name history",
	})
}