/**
 * Chat Switchboard - Storage Module
 * Abstraction layer for storage (localStorage now, API later)
 */

const Storage = {
    // Backend mode: 'local' or 'api'
    mode: 'local',
    apiBase: '/api',

    async get(key, defaultValue = null) {
        if (this.mode === 'api') {
            try {
                const response = await fetch(`${this.apiBase}/storage/${key}`);
                if (response.ok) {
                    return await response.json();
                }
                return defaultValue;
            } catch (e) {
                console.error('Storage API get error:', e);
                return defaultValue;
            }
        }
        
        // Local storage
        try {
            const item = localStorage.getItem(key);
            return item ? JSON.parse(item) : defaultValue;
        } catch (e) {
            console.error('Storage get error:', e);
            return defaultValue;
        }
    },

    async set(key, value) {
        if (this.mode === 'api') {
            try {
                await fetch(`${this.apiBase}/storage/${key}`, {
                    method: 'PUT',
                    headers: { 'Content-Type': 'application/json' },
                    body: JSON.stringify(value)
                });
            } catch (e) {
                console.error('Storage API set error:', e);
            }
            return;
        }
        
        // Local storage
        try {
            localStorage.setItem(key, JSON.stringify(value));
        } catch (e) {
            console.error('Storage set error:', e);
        }
    },

    async remove(key) {
        if (this.mode === 'api') {
            try {
                await fetch(`${this.apiBase}/storage/${key}`, { method: 'DELETE' });
            } catch (e) {
                console.error('Storage API remove error:', e);
            }
            return;
        }
        
        try {
            localStorage.removeItem(key);
        } catch (e) {
            console.error('Storage remove error:', e);
        }
    },

    // Switch to API mode
    useApi(baseUrl = '/api') {
        this.mode = 'api';
        this.apiBase = baseUrl;
    },

    // Switch to local mode
    useLocal() {
        this.mode = 'local';
    }
};

// For standalone HTML, use sync versions
const StorageSync = {
    get(key, defaultValue = null) {
        try {
            const item = localStorage.getItem(key);
            return item ? JSON.parse(item) : defaultValue;
        } catch (e) {
            return defaultValue;
        }
    },
    set(key, value) {
        try {
            localStorage.setItem(key, JSON.stringify(value));
        } catch (e) {
            console.error('Storage set error:', e);
        }
    },
    remove(key) {
        try {
            localStorage.removeItem(key);
        } catch (e) {}
    }
};