package chat

import (
	"context"
	"encoding/json"
	"time"

	"veza-backend-api/internal/models"

	"github.com/google/uuid"
	"go.uber.org/zap"
)

func (h *MessageHandler) HandleTyping(ctx context.Context, client *Client, msg *IncomingMessage) {
	if msg.ConversationID == nil {
		client.SendJSON(NewErrorResponse("conversation_id is required"))
		return
	}

	if !h.rateLimiter.Allow(client.UserID, "typing") {
		return
	}

	isTyping := true
	if msg.IsTyping != nil {
		isTyping = *msg.IsTyping
	}

	outgoing := NewUserTypingResponse(*msg.ConversationID, client.UserID, isTyping)
	data, _ := json.Marshal(outgoing)
	h.hub.BroadcastToRoom(*msg.ConversationID, data, client)

	client.SendJSON(NewActionConfirmedResponse("typing_indicator", true))
}

func (h *MessageHandler) HandleMarkAsRead(ctx context.Context, client *Client, msg *IncomingMessage) {
	if msg.ConversationID == nil || msg.MessageID == nil {
		client.SendJSON(NewErrorResponse("conversation_id and message_id are required"))
		return
	}

	receipt := &models.ReadReceipt{
		ID:        uuid.New(),
		UserID:    client.UserID,
		MessageID: *msg.MessageID,
		ReadAt:    time.Now(),
	}

	if err := h.readRepo.MarkRead(ctx, receipt); err != nil {
		h.logger.Error("Failed to mark as read", zap.Error(err))
		client.SendJSON(NewErrorResponse("failed to mark as read"))
		return
	}

	client.SendJSON(NewActionConfirmedResponse("marked_as_read", true))

	outgoing := NewMessageReadResponse(*msg.MessageID, client.UserID, *msg.ConversationID, receipt.ReadAt)
	data, _ := json.Marshal(outgoing)
	h.hub.BroadcastToRoom(*msg.ConversationID, data, client)

	if h.pubsub != nil {
		_ = h.pubsub.Publish(ctx, *msg.ConversationID, data)
	}
}

func (h *MessageHandler) HandleDelivered(ctx context.Context, client *Client, msg *IncomingMessage) {
	if msg.ConversationID == nil || msg.MessageID == nil {
		client.SendJSON(NewErrorResponse("conversation_id and message_id are required"))
		return
	}

	status := &models.DeliveredStatus{
		ID:          uuid.New(),
		UserID:      client.UserID,
		MessageID:   *msg.MessageID,
		DeliveredAt: time.Now(),
	}

	if err := h.deliveredRepo.MarkDelivered(ctx, status); err != nil {
		h.logger.Error("Failed to mark as delivered", zap.Error(err))
		client.SendJSON(NewErrorResponse("failed to mark as delivered"))
		return
	}

	client.SendJSON(NewActionConfirmedResponse("marked_as_delivered", true))

	outgoing := NewMessageDeliveredResponse(*msg.MessageID, client.UserID, *msg.ConversationID, status.DeliveredAt)
	data, _ := json.Marshal(outgoing)
	h.hub.BroadcastToRoom(*msg.ConversationID, data, client)

	if h.pubsub != nil {
		_ = h.pubsub.Publish(ctx, *msg.ConversationID, data)
	}
}

func (h *MessageHandler) HandleAddReaction(ctx context.Context, client *Client, msg *IncomingMessage) {
	if msg.MessageID == nil || msg.ConversationID == nil {
		client.SendJSON(NewErrorResponse("message_id and conversation_id are required"))
		return
	}
	if msg.Emoji == "" {
		client.SendJSON(NewErrorResponse("emoji is required"))
		return
	}

	reaction := &models.MessageReaction{
		ID:        uuid.New(),
		UserID:    client.UserID,
		MessageID: *msg.MessageID,
		Emoji:     msg.Emoji,
		CreatedAt: time.Now(),
	}

	if err := h.reactionRepo.Add(ctx, reaction); err != nil {
		h.logger.Error("Failed to add reaction", zap.Error(err))
		client.SendJSON(NewErrorResponse("failed to add reaction"))
		return
	}

	client.SendJSON(NewActionConfirmedResponse("reaction_added", true))

	outgoing := NewReactionAddedResponse(*msg.MessageID, *msg.ConversationID, client.UserID, msg.Emoji)
	data, _ := json.Marshal(outgoing)
	h.hub.BroadcastToRoom(*msg.ConversationID, data, nil)

	if h.pubsub != nil {
		_ = h.pubsub.Publish(ctx, *msg.ConversationID, data)
	}
}

func (h *MessageHandler) HandleRemoveReaction(ctx context.Context, client *Client, msg *IncomingMessage) {
	if msg.MessageID == nil || msg.ConversationID == nil {
		client.SendJSON(NewErrorResponse("message_id and conversation_id are required"))
		return
	}

	if err := h.reactionRepo.Remove(ctx, client.UserID, *msg.MessageID); err != nil {
		h.logger.Error("Failed to remove reaction", zap.Error(err))
		client.SendJSON(NewErrorResponse("failed to remove reaction"))
		return
	}

	client.SendJSON(NewActionConfirmedResponse("reaction_removed", true))

	outgoing := NewReactionRemovedResponse(*msg.MessageID, *msg.ConversationID, client.UserID)
	data, _ := json.Marshal(outgoing)
	h.hub.BroadcastToRoom(*msg.ConversationID, data, nil)

	if h.pubsub != nil {
		_ = h.pubsub.Publish(ctx, *msg.ConversationID, data)
	}
}