import { defineStore } from "pinia";

// Global toast instance - will be set during app initialization
let toastInstance = null;

export const useNotificationStore = defineStore("notifications", {
	state: () => ({
		// Configuration for PrimeVue Toast
		defaultLife: 4000,
		position: "top-right",
	}),

	getters: {
		// Helper to check if toast is available
		isToastAvailable: () => !!toastInstance,
	},

	actions: {
		// Add a new notification
		addNotification(notification) {
			const newNotification = {
				id: this.nextId++,
				type: notification.type || "info", // info, success, warning, error
				title: notification.title || "",
				message: notification.message || "",
				duration: notification.duration ?? this.defaultDuration,
				persistent: notification.persistent || false, // If true, won't auto-dismiss
				actions: notification.actions || [], // Array of action buttons
				data: notification.data || null, // Any additional data
				timestamp: new Date().toISOString(),
				dismissed: false,
				seen: false,
			};

			// Add to beginning of array (newest first)
			this.notifications.unshift(newNotification);

			// Trim notifications if we exceed max count
			if (this.notifications.length > this.maxNotifications * 2) {
				// Keep twice the max to maintain some history
				this.notifications = this.notifications.slice(0, this.maxNotifications * 2);
			}

			// Auto-dismiss if not persistent
			if (!newNotification.persistent && newNotification.duration > 0) {
				setTimeout(() => {
					this.dismissNotification(newNotification.id);
				}, newNotification.duration);
			}

			return newNotification.id;
		},

		// Convenience methods for different types of notifications
		addSuccess(message, title = "Success", options = {}) {
			return this.addNotification({
				type: "success",
				title,
				message,
				...options,
			});
		},

		addError(message, title = "Error", options = {}) {
			return this.addNotification({
				type: "error",
				title,
				message,
				duration: options.duration ?? 6000, // Errors stay longer by default
				...options,
			});
		},

		addWarning(message, title = "Warning", options = {}) {
			return this.addNotification({
				type: "warning",
				title,
				message,
				...options,
			});
		},

		addInfo(message, title = "Info", options = {}) {
			return this.addNotification({
				type: "info",
				title,
				message,
				...options,
			});
		},

		// Dismiss a specific notification
		dismissNotification(id) {
			const notification = this.notifications.find((n) => n.id === id);
			if (notification) {
				notification.dismissed = true;
			}
		},

		// Remove a notification completely
		removeNotification(id) {
			const index = this.notifications.findIndex((n) => n.id === id);
			if (index !== -1) {
				this.notifications.splice(index, 1);
			}
		},

		// Mark notification as seen
		markAsSeen(id) {
			const notification = this.notifications.find((n) => n.id === id);
			if (notification) {
				notification.seen = true;
			}
		},

		// Clear all notifications of a specific type
		clearType(type) {
			this.notifications = this.notifications.filter((n) => n.type !== type);
		},

		// Clear all notifications
		clearAll() {
			this.notifications = [];
		},

		// Clear all dismissed notifications
		clearDismissed() {
			this.notifications = this.notifications.filter((n) => !n.dismissed);
		},

		// Update notification content
		updateNotification(id, updates) {
			const notification = this.notifications.find((n) => n.id === id);
			if (notification) {
				Object.assign(notification, updates);
			}
		},

		// Show a loading notification that can be updated
		showLoadingNotification(message, title = "Loading...") {
			return this.addNotification({
				type: "info",
				title,
				message,
				persistent: true,
				actions: [],
			});
		},

		// Update a loading notification to success
		updateToSuccess(id, message, title = "Success") {
			this.updateNotification(id, {
				type: "success",
				title,
				message,
				persistent: false,
				duration: this.defaultDuration,
			});

			// Auto-dismiss after updating
			setTimeout(() => {
				this.dismissNotification(id);
			}, this.defaultDuration);
		},

		// Update a loading notification to error
		updateToError(id, message, title = "Error") {
			this.updateNotification(id, {
				type: "error",
				title,
				message,
				persistent: false,
				duration: 6000,
			});

			// Auto-dismiss after updating
			setTimeout(() => {
				this.dismissNotification(id);
			}, 6000);
		},

		// Show API operation notifications
		showApiSuccess(operation, message = null) {
			const defaultMessages = {
				create: "Item created successfully",
				update: "Item updated successfully",
				delete: "Item deleted successfully",
				fetch: "Data loaded successfully",
			};

			return this.addSuccess(
				message || defaultMessages[operation] || "Operation completed successfully",
				"Success",
			);
		},

		showApiError(operation, error, message = null) {
			const defaultMessages = {
				create: "Failed to create item",
				update: "Failed to update item",
				delete: "Failed to delete item",
				fetch: "Failed to load data",
			};

			let errorMessage = message;
			if (!errorMessage) {
				if (typeof error === "string") {
					errorMessage = error;
				} else if (error?.response?.data?.message) {
					errorMessage = error.response.data.message;
				} else if (error?.message) {
					errorMessage = error.message;
				} else {
					errorMessage = defaultMessages[operation] || "Operation failed";
				}
			}

			return this.addError(errorMessage, "Operation Failed");
		},

		// Configuration methods
		setPosition(position) {
			this.position = position;
		},

		setDefaultDuration(duration) {
			this.defaultDuration = duration;
		},

		setMaxNotifications(max) {
			this.maxNotifications = max;
		},

		// Utility method for handling async operations with notifications
		async withNotifications(operation, asyncFunction, options = {}) {
			const {
				loadingMessage = "Processing...",
				successMessage = null,
				errorMessage = null,
				showLoading = true,
			} = options;

			let loadingId = null;

			try {
				if (showLoading) {
					loadingId = this.showLoadingNotification(loadingMessage);
				}

				const result = await asyncFunction();

				if (loadingId) {
					this.updateToSuccess(
						loadingId,
						successMessage || `${operation} completed successfully`,
					);
				} else if (successMessage !== false) {
					this.showApiSuccess(operation, successMessage);
				}

				return result;
			} catch (error) {
				if (loadingId) {
					this.updateToError(loadingId, errorMessage || error.message);
				} else {
					this.showApiError(operation, error, errorMessage);
				}
				throw error;
			}
		},
	},
});