package handlers

import (
	//"encoding/json"
	"messenger/internal/api/middleware"
	"messenger/internal/api/responses"
	//"messenger/internal/models"
	"messenger/internal/service"
	"net/http"
	"strconv"
	"time"

	"github.com/go-chi/chi/v5"
)

type MessageHandler struct {
	messageService *service.MessageService
	chatService    *service.ChatService
}

func NewMessageHandler(messageService *service.MessageService, chatService *service.ChatService) *MessageHandler {
	return &MessageHandler{
		messageService: messageService,
		chatService:    chatService,
	}
}

func (h *MessageHandler) GetMessages(w http.ResponseWriter, r *http.Request) {
	user := middleware.GetUserFromContext(r.Context())
	if user == nil {
		responses.Unauthorized(w, "user not found")
		return
	}

	chatID, err := strconv.ParseInt(chi.URLParam(r, "id"), 10, 64)
	if err != nil {
		responses.BadRequest(w, "invalid chat id")
		return
	}

	limit := 50
	if l := r.URL.Query().Get("limit"); l != "" {
		if parsed, err := strconv.Atoi(l); err == nil && parsed > 0 && parsed <= 100 {
			limit = parsed
		}
	}

	var before time.Time
	if b := r.URL.Query().Get("before"); b != "" {
		if parsed, err := time.Parse(time.RFC3339, b); err == nil {
			before = parsed
		}
	}

	messages, err := h.messageService.GetChatHistory(r.Context(), chatID, user.ID, limit, before)
	if err != nil {
		responses.InternalServerError(w, err.Error())
		return
	}

	responses.Success(w, http.StatusOK, messages)
}

func (h *MessageHandler) MarkAsRead(w http.ResponseWriter, r *http.Request) {
	user := middleware.GetUserFromContext(r.Context())
	if user == nil {
		responses.Unauthorized(w, "user not found")
		return
	}

	messageID, err := strconv.ParseInt(chi.URLParam(r, "id"), 10, 64)
	if err != nil {
		responses.BadRequest(w, "invalid message id")
		return
	}

	if err := h.messageService.MarkMessageAsRead(r.Context(), messageID, user.ID); err != nil {
		responses.InternalServerError(w, err.Error())
		return
	}

	responses.Success(w, http.StatusOK, map[string]string{"message": "marked as read"})
}