/**
 * @fileoverview Local Storage Service for Rantii
 * @author retoor <retoor@molodetz.nl>
 * @description Manages persistent storage of user data and settings
 * @keywords storage, localStorage, persistence, settings
 */

const STORAGE_PREFIX = 'rantii_';

class StorageService {
    constructor() {
        this.prefix = STORAGE_PREFIX;
    }

    key(name) {
        return `${this.prefix}${name}`;
    }

    set(name, value) {
        try {
            const serialized = JSON.stringify(value);
            localStorage.setItem(this.key(name), serialized);
            return true;
        } catch (error) {
            return false;
        }
    }

    get(name, defaultValue = null) {
        try {
            const item = localStorage.getItem(this.key(name));
            if (item === null) {
                return defaultValue;
            }
            return JSON.parse(item);
        } catch (error) {
            return defaultValue;
        }
    }

    remove(name) {
        try {
            localStorage.removeItem(this.key(name));
            return true;
        } catch (error) {
            return false;
        }
    }

    clear() {
        try {
            const keys = Object.keys(localStorage).filter(k => k.startsWith(this.prefix));
            keys.forEach(key => localStorage.removeItem(key));
            return true;
        } catch (error) {
            return false;
        }
    }

    has(name) {
        return localStorage.getItem(this.key(name)) !== null;
    }

    getAuth() {
        return this.get('auth', null);
    }

    setAuth(authData) {
        return this.set('auth', authData);
    }

    clearAuth() {
        return this.remove('auth');
    }

    getTheme() {
        return this.get('theme', 'dark');
    }

    setTheme(theme) {
        return this.set('theme', theme);
    }

    getSettings() {
        return this.get('settings', {
            theme: 'dark',
            fontSize: 'medium',
            notifications: true
        });
    }

    setSettings(settings) {
        return this.set('settings', settings);
    }

    updateSettings(partial) {
        const current = this.getSettings();
        return this.setSettings({ ...current, ...partial });
    }

    getRecentSearches() {
        return this.get('recent_searches', []);
    }

    addRecentSearch(term) {
        const searches = this.getRecentSearches();
        const filtered = searches.filter(s => s !== term);
        filtered.unshift(term);
        return this.set('recent_searches', filtered.slice(0, 10));
    }

    getDraftRant() {
        return this.get('draft_rant', '');
    }

    setDraftRant(text) {
        return this.set('draft_rant', text);
    }

    clearDraftRant() {
        return this.remove('draft_rant');
    }

    getDraftComment(rantId) {
        return this.get(`draft_comment_${rantId}`, '');
    }

    setDraftComment(rantId, text) {
        return this.set(`draft_comment_${rantId}`, text);
    }

    clearDraftComment(rantId) {
        return this.remove(`draft_comment_${rantId}`);
    }

    getCachedProfile(userId) {
        return this.get(`profile_cache_${userId}`, null);
    }

    setCachedProfile(userId, profile) {
        return this.set(`profile_cache_${userId}`, {
            data: profile,
            timestamp: Date.now()
        });
    }

    isCacheValid(cacheEntry, maxAge = 300000) {
        if (!cacheEntry || !cacheEntry.timestamp) {
            return false;
        }
        return Date.now() - cacheEntry.timestamp < maxAge;
    }
}

export { StorageService, STORAGE_PREFIX };