import { create } from 'zustand';
import api from '../api/axiosConfig';

const useAuthStore = create((set) => ({
    isAuthenticated: false,
    isLoading: true,
    error: null,
    user: null,

    login: async (username, password) => {
        set({ isLoading: true, error: null });
        try {
            const res = await api.post('login/', { username, password });
            set({
                isAuthenticated: true,
                isLoading: false,
                user: {
                    username: res.data.username,
                    firstName: res.data.first_name,
                    lastName: res.data.last_name,
                    email: res.data.email,
                    fullName: [res.data.first_name, res.data.last_name].filter(Boolean).join(' '),
                    // Catch the layout and map data on fresh login!
                    preferences: res.data.preferences || {}
                }
            });
        } catch (err) {
            // PROPER USAGE: Check if Django sent a specific error string, otherwise default
            const backendError = err.response?.data?.error || 'Invalid network credentials';
            set({ error: backendError, isLoading: false, isAuthenticated: false });
        }
    },

    logout: async () => {
        try {
            await api.post('logout/');
        } catch (err) {
            console.error("Logout error:", err);
        } finally {
            set({ isAuthenticated: false, user: null, error: null });
        }
    },

    checkAuth: async () => {
        try {
            // Hit the new lightweight endpoint
            const res = await api.get('session/');

            // Rehydrate the store with the user's info!
            set({
                isAuthenticated: true,
                isLoading: false,
                user: {
                    username: res.data.username,
                    firstName: res.data.first_name,
                    lastName: res.data.last_name,
                    email: res.data.email,
                    fullName: [res.data.first_name, res.data.last_name].filter(Boolean).join(' '),
                    // Catch the layout and map data on page refresh!
                    preferences: res.data.preferences || {}
                }
            });
        } catch {
            // If it fails, ensure the store is completely wiped
            set({ isAuthenticated: false, isLoading: false, user: null });
        }
    },

    // Allow the UI to save widget placement
    saveDashboardLayout: async (newLayout) => {
        try {
            // 1. Optimistically update React state for zero UI lag
            set((state) => ({
                user: {
                    ...state.user,
                    preferences: {
                        ...state.user.preferences,
                        dashboard_layout: newLayout
                    }
                }
            }));

            // 2. Quietly push the save command to Django
            await api.post('dashboard/save/', { layout: newLayout });

        } catch (error) {
            console.error("Failed to save layout to database", error);
        }
    },

    // updateProfile: async (newProfile) => {
    //     try {
    //         set((state) => ({
    //             user: {
    //                 ...state.user,
    //                 username: newProfile.username,
    //             }
    //         }));
    //
    //         await api.post('profile/update/', { profile: newProfile });
    //     } catch (error) {
    //         console.error("Failed to update profile", error);
    //     }
    // }
}));

export default useAuthStore;