/**
 * Parser for FFXI Trust character data from PostgreSQL database
 */

class TrustParser {
    constructor() {
        this.roles = [];
        this.characters = {};
        this.charactersByRole = {};
        this.allCharacters = [];
        this.dbConfig = null;
    }

    /**
     * Initialize the database configuration
     */
    async initDbConfig() {
        try {
            // Try to read from environment variables first (for Docker deployment)
            if (window.ENV && window.ENV.PSQL_HOST) {
                console.log('Using database configuration from environment variables');
                this.dbConfig = {
                    PSQL_USER: window.ENV.PSQL_USER,
                    PSQL_HOST: window.ENV.PSQL_HOST,
                    PSQL_DBNAME: window.ENV.PSQL_DBNAME,
                    PSQL_PASSWORD: window.ENV.PSQL_PASSWORD,
                    PSQL_PORT: window.ENV.PSQL_PORT || '5432',
                };
                return true;
            }
            
            // Fall back to db.conf file
            console.log('Reading database configuration from db.conf file');
            const response = await fetch('db.conf');
            const text = await response.text();
            
            // Parse the db.conf file
            const dbConfig = {};
            text.split('\n').forEach(line => {
                if (line.trim() === '') return;
                
                const [key, value] = line.split('=');
                if (key && value) {
                    // Remove quotes if present
                    const cleanValue = value.replace(/^['"]|['"]$/g, '');
                    dbConfig[key] = cleanValue;
                }
            });
            
            this.dbConfig = dbConfig;
            return true;
        } catch (error) {
            console.error('Error loading database configuration:', error);
            return false;
        }
    }

    /**
     * Process the data from the database
     * @param {Array} data - Array of character objects from the database
     */
    processData(data) {
        // Extract unique roles
        const roleSet = new Set();
        data.forEach(char => {
            if (char.role && char.role.trim()) {
                roleSet.add(char.role.trim());
            }
        });
        
        this.roles = Array.from(roleSet);
        
        // Initialize charactersByRole
        this.roles.forEach(role => {
            this.charactersByRole[role] = [];
        });
        
        // Process each character
        data.forEach(char => {
            // Create a character object with normalized property names
            const character = {
                id: char.id,
                name: char.name,
                altName: char.alt_name || '',
                role: char.role || 'Unknown',
                job: char.job || '',
                spells: char.spells || '',
                abilities: char.abilities || '',
                weaponSkills: char.weapon_skills || '',
                invincible: char.invincible || false,
                acquisition: char.acquisition || '',
                specialFeatures: char.special_features || '',
                trustSynergy: char.trust_synergy || '',
                trustSynergyNames: char.trust_synergy_names || [],
                acquired: char.acquired || false
            };
            
            // Add to characters object
            this.characters[char.name] = character;
            
            // Add to charactersByRole
            if (character.role && this.charactersByRole[character.role]) {
                this.charactersByRole[character.role].push(character.name);
            }
            
            // Add to allCharacters
            this.allCharacters.push({
                name: character.name,
                role: character.role
            });
        });
    }

    /**
     * Load data from the database
     * @param {Function} callback - Function to call when loading is complete
     */
    async loadData(callback) {
        try {
            // Initialize database configuration if not already done
            if (!this.dbConfig) {
                const success = await this.initDbConfig();
                if (!success) {
                    throw new Error('Failed to initialize database configuration');
                }
            }
            
            // Create the API endpoint URL
            const apiUrl = `/api/trusts`;
            
            // Fetch data from the API
            const response = await fetch(apiUrl);
            if (!response.ok) {
                throw new Error(`API request failed with status ${response.status}`);
            }
            
            const data = await response.json();
            
            // Process the data
            this.processData(data);
            
            // Call the callback with the processed data
            if (callback) {
                callback({
                    roles: this.roles,
                    characters: this.characters,
                    charactersByRole: this.charactersByRole,
                    allCharacters: this.allCharacters
                });
            }
        } catch (error) {
            console.error('Error loading trust data:', error);
            
            // Fallback to JSON file if database connection fails
            console.log('Falling back to JSON file...');
            this.loadFromJson(callback);
        }
    }
    
    /**
     * Fallback method to load data from JSON file
     * @param {Function} callback - Function to call when loading is complete
     */
    loadFromJson(callback) {
        fetch('trusts.json')
            .then(response => response.json())
            .then(data => {
                this.processData(data);
                
                // Call the callback with the processed data
                if (callback) {
                    callback({
                        roles: this.roles,
                        characters: this.characters,
                        charactersByRole: this.charactersByRole,
                        allCharacters: this.allCharacters
                    });
                }
            })
            .catch(error => {
                console.error('Error loading trust data from JSON:', error);
            });
    }

    /**
     * Search for characters by name or other attributes
     * @param {string} query - Search query
     * @returns {Array} - Array of matching characters
     */
    searchCharacters(query) {
        if (!query) return this.allCharacters;
        
        query = query.toLowerCase();
        
        return this.allCharacters.filter(char => {
            const character = this.characters[char.name];
            
            // Search by name
            if (char.name.toLowerCase().includes(query)) return true;
            
            // Search by alt_name
            if (character.altName && character.altName.toLowerCase().includes(query)) return true;
            
            // Search by role
            if (char.role.toLowerCase().includes(query)) return true;
            
            // Search by job
            if (character.job && character.job.toLowerCase().includes(query)) return true;
            
            // Search by abilities
            if (character.abilities && character.abilities.toLowerCase().includes(query)) return true;
            
            // Search by spells
            if (character.spells && character.spells.toLowerCase().includes(query)) return true;
            
            return false;
        });
    }
    
    /**
     * Toggle the acquired status of a character
     * @param {number} id - The ID of the character to toggle
     * @returns {Promise<Object>} - The updated character
     */
    async toggleAcquired(id) {
        try {
            // Create the API endpoint URL
            const apiUrl = `/api/trusts/${id}/toggle-acquired`;
            
            // Send a PUT request to toggle the acquired status
            const response = await fetch(apiUrl, {
                method: 'PUT',
                headers: {
                    'Content-Type': 'application/json'
                }
            });
            
            if (!response.ok) {
                throw new Error(`API request failed with status ${response.status}`);
            }
            
            // Get the updated character
            const updatedChar = await response.json();
            
            // Update the character in our local data
            if (this.characters[updatedChar.name]) {
                this.characters[updatedChar.name].acquired = updatedChar.acquired;
            }
            
            return updatedChar;
        } catch (error) {
            console.error('Error toggling acquired status:', error);
            throw error;
        }
    }
}

// Create a global instance of the parser
const trustParser = new TrustParser();