/*
   ELYSIA MARKDOWN STUDIO v1.0 - Utility Functions
   Toast, modals, storage, helpers
*/

const Utils = {
    // Toast Notifications
    toast: {
        show(message, type = "info", duration = 3000) {
            const container = document.getElementById("toast-container");
            const toast = document.createElement("div");
            toast.className = `toast ${type}`;

            const icons = {
                success: "✅",
                error: "❌",
                warning: "⚠️",
                info: "ℹ️",
                loading: "⏳"
            };

            toast.innerHTML = `
                <span class="toast-icon">${icons[type]}</span>
                <span class="toast-message">${message}</span>
                <button class="toast-close">×</button>
            `;

            container.appendChild(toast);

            const close = () => {
                toast.style.animation = "slideOut 0.3s ease";
                setTimeout(() => toast.remove(), 300);
            };

            toast.querySelector(".toast-close").onclick = close;
            if (duration > 0) setTimeout(close, duration);

            return toast;
        },

        success: (msg, duration) => Utils.toast.show(msg, "success", duration),
        error: (msg, duration) => Utils.toast.show(msg, "error", duration),
        warning: (msg, duration) => Utils.toast.show(msg, "warning", duration),
        info: (msg, duration) => Utils.toast.show(msg, "info", duration)
    },

    // Modal Management
    modal: {
        open(modalId) {
            const modal = document.getElementById(modalId);
            if (modal) {
                modal.classList.add("active");
                document.body.style.overflow = "hidden";
            }
        },

        close(modalId) {
            const modal = document.getElementById(modalId);
            if (modal) {
                modal.classList.remove("active");
                document.body.style.overflow = "";
            }
        },

        init() {
            document.querySelectorAll(".modal").forEach(modal => {
                modal.addEventListener("click", e => {
                    if (e.target === modal) {
                        Utils.modal.close(modal.id);
                    }
                });
            });

            document.querySelectorAll(".modal-close, [data-modal]").forEach(btn => {
                btn.addEventListener("click", () => {
                    const modalId = btn.getAttribute("data-modal");
                    if (modalId) Utils.modal.close(modalId);
                });
            });
        }
    },

    // Local Storage Wrapper (with encryption for sensitive data)
    storage: {
        // Simple XOR encryption (basic obfuscation - better than plaintext)
        _encrypt(text) {
            const key = "ElysiaStudio2025"; // Simple key for obfuscation
            let encrypted = "";
            for (let i = 0; i < text.length; i++) {
                encrypted += String.fromCharCode(text.charCodeAt(i) ^ key.charCodeAt(i % key.length));
            }
            return btoa(encrypted); // Base64 encode
        },

        _decrypt(encrypted) {
            try {
                const decoded = atob(encrypted);
                const key = "ElysiaStudio2025";
                let decrypted = "";
                for (let i = 0; i < decoded.length; i++) {
                    decrypted += String.fromCharCode(decoded.charCodeAt(i) ^ key.charCodeAt(i % key.length));
                }
                return decrypted;
            } catch {
                return null;
            }
        },

        get(key, defaultValue = null) {
            try {
                const value = localStorage.getItem(key);
                if (!value) return defaultValue;

                // Decrypt API key if it's stored
                if (key === "apiKey") {
                    const decrypted = this._decrypt(value);
                    return decrypted || defaultValue;
                }

                return JSON.parse(value);
            } catch {
                return defaultValue;
            }
        },

        set(key, value) {
            try {
                // Encrypt API key before storing
                if (key === "apiKey" && value) {
                    localStorage.setItem(key, this._encrypt(value));
                    return true;
                }

                localStorage.setItem(key, JSON.stringify(value));
                return true;
            } catch {
                return false;
            }
        },

        remove(key) {
            localStorage.removeItem(key);
        },

        clear() {
            localStorage.clear();
        }
    },

    // Format Date/Time
    formatDateTime(date) {
        const d = new Date(date);
        return d.toLocaleString();
    },

    // Format Date (short)
    formatDate(date) {
        const d = new Date(date);
        const now = new Date();
        const diff = now - d;

        if (diff < 60000) return "Just now";
        if (diff < 3600000) return `${Math.floor(diff / 60000)}m ago`;
        if (diff < 86400000) return `${Math.floor(diff / 3600000)}h ago`;
        if (diff < 604800000) return `${Math.floor(diff / 86400000)}d ago`;

        return d.toLocaleDateString();
    },

    // Count Words
    countWords(text) {
        return text.trim() ? text.trim().split(/\s+/).length : 0;
    },

    // Count Characters
    countChars(text) {
        return text.length;
    },

    // Count Lines
    countLines(text) {
        return text.split("\n").length;
    },

    // Calculate reading time (average 200 words per minute)
    readingTime(wordCount) {
        const minutes = Math.ceil(wordCount / 200);
        if (minutes < 1) return "< 1 min read";
        if (minutes === 1) return "1 min read";
        return `${minutes} min read`;
    },

    // Download File
    downloadFile(content, filename, mimeType = "text/plain") {
        const blob = new Blob([content], { type: mimeType });
        const url = URL.createObjectURL(blob);
        const a = document.createElement("a");
        a.href = url;
        a.download = filename;
        a.click();
        URL.revokeObjectURL(url);
    },

    // Copy to Clipboard
    async copyToClipboard(text) {
        try {
            await navigator.clipboard.writeText(text);
            Utils.toast.success("Copied to clipboard!");
            return true;
        } catch (err) {
            Utils.toast.error("Failed to copy");
            return false;
        }
    },

    // Debounce Function
    debounce(func, wait) {
        let timeout;
        return function executedFunction(...args) {
            const later = () => {
                clearTimeout(timeout);
                func(...args);
            };
            clearTimeout(timeout);
            timeout = setTimeout(later, wait);
        };
    },

    // Generate UUID
    uuid() {
        return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, c => {
            const r = (Math.random() * 16) | 0;
            const v = c === "x" ? r : (r & 0x3) | 0x8;
            return v.toString(16);
        });
    },

    // Sanitize Filename
    sanitizeFilename(name) {
        return name.replace(/[^a-z0-9_\-\.]/gi, "_");
    },

    // Truncate Text
    truncate(text, maxLength) {
        return text.length > maxLength ? text.substring(0, maxLength) + "..." : text;
    },

    // Escape HTML
    escapeHtml(text) {
        const div = document.createElement("div");
        div.textContent = text;
        return div.innerHTML;
    }
};

// Initialize modals on load
document.addEventListener("DOMContentLoaded", () => {
    Utils.modal.init();
});

export default Utils;