/* jshint esversion: 2024, module: true */

/**
 * Configuration Manager for handling config files
 * @class ConfigManager
 */
class ConfigManager {
    /**
     * @param {Object} elements - DOM elements
     * @param {ApiClient} apiClient - API client instance
     * @param {Object} state - Application state
     */
    constructor(elements, apiClient, state) {
        this.elements = elements;
        this.apiClient = apiClient;
        this.state = state;
    }

    /**
     * Refresh configuration file list
     * @method refreshConfigs
     */
    async refreshConfigs() {
        try {
            const data = await this.apiClient.get('/api/configs');
            
            this.elements.inputs.configSelect.innerHTML = '';
            data.files?.forEach(file => {
                const option = new Option(file, file);
                this.elements.inputs.configSelect.add(option);
            });
            
            if (data.files?.length > 0) {
                this.state.currentConfigFile = data.files[0];
                await this.loadConfig();
            } else {
                this.elements.inputs.cfgEditor.value = '';
                this.state.currentConfigFile = null;
            }
        } catch (error) {
            alert(`Failed to list configs: ${error.message}`);
        }
    }

    /**
     * Load selected configuration file
     * @method loadConfig
     */
    async loadConfig() {
        const name = this.elements.inputs.configSelect.value;
        if (!name) return;
        
        this.state.currentConfigFile = name;
        
        try {
            const text = await this.apiClient.getText(`/api/config/${encodeURIComponent(name)}`);
            this.elements.inputs.cfgEditor.value = text;
            this.elements.outputs.validateResult.textContent = '';
        } catch (error) {
            alert(`Failed to load: ${error.message}`);
        }
    }

    /**
     * Validate current configuration
     * @method validateConfig
     */
    async validateConfig() {
        const name = this.elements.inputs.configSelect.value;
        const content = this.elements.inputs.cfgEditor.value;
        
        this.elements.outputs.validateResult.textContent = 'Validating...';
        this.elements.outputs.validateResult.className = 'validation-pending';
        
        try {
            const result = await this.apiClient.post('/api/validate', { name, content });
            
            if (result.ok) {
                this.elements.outputs.validateResult.textContent = '✓ Configuration is valid';
                this.elements.outputs.validateResult.className = 'validation-success';
            } else {
                this.elements.outputs.validateResult.textContent = `✗ ${result.output || 'Validation failed'}`;
                this.elements.outputs.validateResult.className = 'validation-error';
            }
        } catch (error) {
            this.elements.outputs.validateResult.textContent = `✗ Error: ${error.message}`;
            this.elements.outputs.validateResult.className = 'validation-error';
        }
    }
}

export { ConfigManager };