package rumble

import (
	"context"
	"encoding/json"

	"github.com/r3labs/sse"
)

const (
	ChatBadgeRecurringSubscription = "recurring_subscription"
	ChatBadgeLocalsSupporter       = "locals_supporter"

	ChatTypeInit           = "init"
	ChatTypeMessages       = "messages"
	ChatTypeMuteUsers      = "mute_users"
	ChatTypeDeleteMessages = "delete_messages"
	ChatTypeSubscriber     = "locals_supporter"
	ChatTypeRaiding        = "raid_confirmed"
	ChatTypePinMessage     = "pin_message"
	ChatTypeUnpinMessage   = "unpin_message"
)

type ChatEventChannels struct {
	ErrorCh chan error
}

type RegisterChatEventsOptions struct {
}

// TODO: for every true bool, create channel, otherwise nil.
// TODO: always create error channel
func RegisterChatEvents(opts RegisterChatEventsOptions) *ChatEventChannels {

}

type chatClient struct {
	cancel    context.CancelFunc
	sseCancel context.CancelFunc
	sseCl     *sse.Client
	sseEvent  chan *sse.Event
}

type RawChatEventChannel struct {
	ID       string `json:"id"`
	Image1   string `json:"image.1"`
	Link     string `json:"link"`
	Username string `json:"username"`
}

type RawChatEventBlockData struct {
	Text string `json:"text"`
}

type RawChatEventBlock struct {
	Data RawChatEventBlockData `json:"data"`
	Type string                `json:"type"`
}

type RawChatEventNotification struct {
	Badge string `json:"badge"`
	Text  string `json:"text"`
}

type RawChatEventRaidNotification struct {
	StartTs int64 `json:"start_ts"`
}

type RawChatEventRant struct {
	Duration   int    `json:"duration"`
	ExpiresOn  string `json:"expires_on"`
	PriceCents int    `json:"price_cents"`
}

type RawChatEventMessage struct {
	Blocks           []RawChatEventBlock           `json:"blocks"`
	ChannelID        *int64                        `json:"channel_id"`
	ID               string                        `json:"id"`
	Notification     *RawChatEventNotification     `json:"notification"`
	RaidNotification *RawChatEventRaidNotification `json:"raid_notification"`
	Rant             *RawChatEventRant             `json:"rant"`
	Text             string                        `json:"text"`
	Time             string                        `json:"time"`
	UserID           string                        `json:"user_id"`
}

type RawChatEventUser struct {
	Badges     []string `json:"badges"`
	Color      string   `json:"color"`
	ID         string   `json:"id"`
	Image1     string   `json:"image.1"`
	IsFollower bool     `json:"is_follower"`
	Link       string   `json:"link"`
	Username   string   `json:"username"`
}

type RawChatEventData struct {
	Channels []RawChatEventChannel `json:"channels"`
	Messages []RawChatEventMessage `json:"messages"`
	Users    []RawChatEventUser    `json:"users"`
}

type RawChatEvent struct {
	Data      RawChatEventData `json:"data"`
	RequestID string           `json:"request_id"`
	Type      string           `json:"type"`
}

type RawChatEventAny struct {
	Data any    `json:"data"`
	Type string `json:"type"`
}

type RawChatEventDataNoChannels struct {
	// Channels [][]string         `json:"channels"`
	Channels [][]any               `json:"channels"`
	Messages []RawChatEventMessage `json:"messages"`
	Users    []RawChatEventUser    `json:"users"`
}

type RawChatEventNoChannels struct {
	Data      RawChatEventDataNoChannels `json:"data"`
	RequestID string                     `json:"request_id"`
	Type      string                     `json:"type"`
}

type ChatBase struct {
	Data any    `json:"data"`
	Type string `json:"type"`
}

func (rce RawChatEvent) users() map[string]RawChatEventUser {
	uMap := map[string]RawChatEventUser{}
	for _, user := range rce.Data.Users {
		uMap[user.ID] = user
	}

	return uMap
}

func (rce RawChatEvent) channels() map[string]RawChatEventChannel {
	cMap := map[string]RawChatEventChannel{}
	for _, channel := range rce.Data.Channels {
		cMap[channel.ID] = channel
	}

	return cMap
}

// func (rce RawChatEvent) parse() ([]ChatEvent, error) {
// 	events := []ChatEvent{}

// 	users := rce.users()
// 	channels := rce.channels()

// 	for _, message := range rce.Data.Messages {
// 		var event ChatEvent
// 		user, exists := users[message.UserID]
// 		if !exists {
// 			return nil, fmt.Errorf("missing user information for user ID: %s", message.UserID)
// 		}

// 		event.Badges = user.Badges
// 		event.Color = user.Color
// 		event.ImageUrl = user.Image1
// 		event.IsFollower = user.IsFollower
// 		if message.RaidNotification != nil {
// 			event.Raid = true
// 		}
// 		if message.Rant != nil {
// 			event.Rant = message.Rant.PriceCents
// 		}
// 		if message.Notification != nil {
// 			if message.Notification.Badge == ChatBadgeRecurringSubscription {
// 				event.Sub = true
// 			}
// 		}
// 		event.Text = message.Text
// 		t, err := time.Parse(time.RFC3339, message.Time)
// 		if err != nil {
// 			return nil, fmt.Errorf("error parsing message time: %v", err)
// 		}
// 		event.Time = t
// 		event.Type = rce.Type
// 		event.Username = user.Username

// 		if message.ChannelID != nil {
// 			cid := strconv.Itoa(int(*message.ChannelID))
// 			channel, exists := channels[cid]
// 			if !exists {
// 				return nil, fmt.Errorf("missing channel information for channel ID: %s", cid)
// 			}

// 			event.ImageUrl = channel.Image1
// 			event.ChannelName = channel.Username
// 		}

// 		events = append(events, event)
// 	}

// 	return events, nil
// }

// type ChatEvent struct {
// 	Badges      []string
// 	ChannelName string
// 	Color       string
// 	ImageUrl    string
// 	Init        bool
// 	IsFollower  bool
// 	Raid        bool
// 	Rant        int
// 	Sub         bool
// 	Text        string
// 	Time        time.Time
// 	Type        string
// 	Username    string
// }

func (cl *chatClient) start(ctx context.Context, eventCh chan *sse.Event) {
	for {
		select {
		case <-ctx.Done():
			cl.sseCancel()
			return
		case event := <-eventCh:
			if event == nil {
				// handleError(fmt.Errorf("received nil event"))
			} else {
				cl.handleEvent(event)
				// chats, err := parseEvent(event.Data)
				// if err != nil {
				// 	handleError(err)
				// } else {
				// 	for _, chat := range chats {
				// 		handle(chat)
				// 	}
				// }
			}
		}
	}
}

func (cl *chatClient) handleEvent(e *sse.Event) {
	var base ChatBase
	err := json.Unmarshal(e, &base)
	if err != nil {
		// send error
		return
	}
}

// func parseEvent(event []byte) ([]ChatEvent, error) {
// 	var rce RawChatEvent
// 	err := json.Unmarshal(event, &rce)
// 	if err != nil {
// 		var rcenc RawChatEventNoChannels
// 		errnc := json.Unmarshal(event, &rcenc)
// 		if errnc != nil {
// 			var rcea RawChatEventAny
// 			errany := json.Unmarshal(event, &rcea)
// 			if errany != nil {
// 				return nil, fmt.Errorf("error un-marshaling event: %v", err)
// 			}
// 			// ChatEvent type not supported, return empty events
// 			return []ChatEvent{}, nil
// 		}

// 		rce.Data.Messages = rcenc.Data.Messages
// 		rce.Data.Users = rcenc.Data.Users
// 		rce.RequestID = rcenc.RequestID
// 		rce.Type = rcenc.Type
// 	}

// 	events, err := rce.parse()
// 	if err != nil {
// 		return nil, fmt.Errorf("error parsing raw chat event: %v", err)
// 	}

// 	return events, nil
// }