package handlers

import (
	"encoding/json"
	"net/http"

	"go.mongodb.org/mongo-driver/bson"

	"neomovies-api/pkg/middleware"
	"neomovies-api/pkg/models"
	"neomovies-api/pkg/services"
)

type AuthHandler struct {
	authService *services.AuthService
}

func NewAuthHandler(authService *services.AuthService) *AuthHandler {
	return &AuthHandler{
		authService: authService,
	}
}

func (h *AuthHandler) Register(w http.ResponseWriter, r *http.Request) {
	var req models.RegisterRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	response, err := h.authService.Register(req)
	if err != nil {
		http.Error(w, err.Error(), http.StatusConflict)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusCreated)
	json.NewEncoder(w).Encode(models.APIResponse{
		Success: true,
		Data:    response,
		Message: "User registered successfully",
	})
}

func (h *AuthHandler) Login(w http.ResponseWriter, r *http.Request) {
	var req models.LoginRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	response, err := h.authService.Login(req)
	if err != nil {
		// Определяем правильный статус код в зависимости от ошибки
		statusCode := http.StatusBadRequest
		if err.Error() == "Account not activated. Please verify your email." {
			statusCode = http.StatusForbidden // 403 для неверифицированного email
		}
		http.Error(w, err.Error(), statusCode)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(models.APIResponse{
		Success: true,
		Data:    response,
		Message: "Login successful",
	})
}

func (h *AuthHandler) GetProfile(w http.ResponseWriter, r *http.Request) {
	userID, ok := middleware.GetUserIDFromContext(r.Context())
	if !ok {
		http.Error(w, "User ID not found in context", http.StatusInternalServerError)
		return
	}

	user, err := h.authService.GetUserByID(userID)
	if err != nil {
		http.Error(w, "User not found", http.StatusNotFound)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(models.APIResponse{
		Success: true,
		Data:    user,
	})
}

func (h *AuthHandler) UpdateProfile(w http.ResponseWriter, r *http.Request) {
	userID, ok := middleware.GetUserIDFromContext(r.Context())
	if !ok {
		http.Error(w, "User ID not found in context", http.StatusInternalServerError)
		return
	}

	var updates map[string]interface{}
	if err := json.NewDecoder(r.Body).Decode(&updates); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	// Удаляем поля, которые нельзя обновлять через этот эндпоинт
	delete(updates, "password")
	delete(updates, "email")
	delete(updates, "_id")
	delete(updates, "created_at")

	user, err := h.authService.UpdateUser(userID, bson.M(updates))
	if err != nil {
		http.Error(w, "Failed to update user", http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(models.APIResponse{
		Success: true,
		Data:    user,
		Message: "Profile updated successfully",
	})
}

// Верификация email
func (h *AuthHandler) VerifyEmail(w http.ResponseWriter, r *http.Request) {
	var req models.VerifyEmailRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	response, err := h.authService.VerifyEmail(req)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(response)
}

// Повторная отправка кода верификации
func (h *AuthHandler) ResendVerificationCode(w http.ResponseWriter, r *http.Request) {
	var req models.ResendCodeRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	response, err := h.authService.ResendVerificationCode(req)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(response)
}