import { initializeApp } from "./main.common";
import { logger } from "./utils/logger";
import { SQLiteQueryResult } from "./services/platforms/ElectronPlatformService";

const platform = process.env.VITE_PLATFORM;
const pwa_enabled = process.env.VITE_PWA_ENABLED === "true";

logger.info("[Main Electron] Initializing app");
logger.info("[Main Electron] Platform:", { platform });
logger.info("[Main Electron] PWA enabled:", { pwa_enabled });

if (pwa_enabled) {
  logger.warn("[Main Electron] PWA is enabled, but not supported in electron");
}

let appIsMounted = false;

// Initialize app and SQLite
const app = initializeApp();

/**
 * SQLite initialization configuration
 * Defines timeouts and retry settings for database operations
 * 
 * @author Matthew Raymer
 */
const SQLITE_CONFIG = {
  INITIALIZATION: {
    TIMEOUT_MS: 10000,  // 10 seconds for initial setup
    RETRY_ATTEMPTS: 3,
    RETRY_DELAY_MS: 1000
  },
  OPERATIONS: {
    TIMEOUT_MS: 5000,   // 5 seconds for regular operations
    RETRY_ATTEMPTS: 2,
    RETRY_DELAY_MS: 500
  },
  CONNECTION: {
    MAX_CONNECTIONS: 5,
    IDLE_TIMEOUT_MS: 30000
  }
};

// Create a promise that resolves when SQLite is ready
const sqliteReady = new Promise<void>((resolve, reject) => {
  let retryCount = 0;
  let initializationTimeout: NodeJS.Timeout;
  
  const attemptInitialization = () => {
    // Clear any existing timeout
    if (initializationTimeout) {
      clearTimeout(initializationTimeout);
    }
    
    // Set timeout for this attempt
    initializationTimeout = setTimeout(() => {
      if (retryCount < SQLITE_CONFIG.INITIALIZATION.RETRY_ATTEMPTS) {
        retryCount++;
        logger.warn(`[Main Electron] SQLite initialization attempt ${retryCount} timed out, retrying...`);
        setTimeout(attemptInitialization, SQLITE_CONFIG.INITIALIZATION.RETRY_DELAY_MS);
      } else {
        logger.error("[Main Electron] SQLite initialization failed after all retries");
        reject(new Error("SQLite initialization timeout after all retries"));
      }
    }, SQLITE_CONFIG.INITIALIZATION.TIMEOUT_MS);

    // Wait for electron bridge to be available
    const checkElectronBridge = () => {
      if (!window.electron?.ipcRenderer) {
        // Check again in 100ms if bridge isn't ready
        setTimeout(checkElectronBridge, 100);
        return;
      }
      
      // At this point we know ipcRenderer exists
      const ipcRenderer = window.electron.ipcRenderer;
      
      logger.info("[Main Electron] [IPC:bridge] IPC renderer bridge available");
      
      // Listen for SQLite ready signal
      logger.debug("[Main Electron] [IPC:sqlite-ready] Registering listener for SQLite ready signal");
      ipcRenderer.once('sqlite-ready', () => {
        clearTimeout(initializationTimeout);
        logger.info("[Main Electron] [IPC:sqlite-ready] Received SQLite ready signal");
        resolve();
      });

      // Also listen for database errors
      logger.debug("[Main Electron] [IPC:database-status] Registering listener for database status");
      ipcRenderer.once('database-status', (...args: unknown[]) => {
        clearTimeout(initializationTimeout);
        const status = args[0] as { status: string; error?: string };
        if (status.status === 'error') {
          logger.error("[Main Electron] [IPC:database-status] Database error:", {
            error: status.error,
            channel: 'database-status'
          });
          reject(new Error(status.error || 'Database initialization failed'));
        }
      });

      // Check if SQLite is already available
      logger.debug("[Main Electron] [IPC:sqlite-is-available] Checking SQLite availability");
      ipcRenderer.invoke('sqlite-is-available')
        .then(async (result: unknown) => {
          const isAvailable = Boolean(result);
          if (isAvailable) {
            logger.info("[Main Electron] [IPC:sqlite-is-available] SQLite is available");
            
            try {
              // First create a database connection
              logger.debug("[Main Electron] [IPC:get-path] Requesting database path");
              const dbPath = await ipcRenderer.invoke('get-path');
              logger.info("[Main Electron] [IPC:get-path] Database path received:", { dbPath });
              
              // Create the database connection
              logger.debug("[Main Electron] [IPC:sqlite-create-connection] Creating database connection");
              await ipcRenderer.invoke('sqlite-create-connection', {
                database: 'timesafari',
                version: 1
              });
              logger.info("[Main Electron] [IPC:sqlite-create-connection] Database connection created");
              
              // Explicitly open the database
              logger.debug("[Main Electron] [IPC:sqlite-open] Opening database");
              await ipcRenderer.invoke('sqlite-open', {
                database: 'timesafari'
              });
              logger.info("[Main Electron] [IPC:sqlite-open] Database opened successfully");
              
              // Verify the database is open
              logger.debug("[Main Electron] [IPC:sqlite-is-db-open] Verifying database is open");
              const isOpen = await ipcRenderer.invoke('sqlite-is-db-open', {
                database: 'timesafari'
              });
              logger.info("[Main Electron] [IPC:sqlite-is-db-open] Database open status:", { isOpen });
              
              if (!isOpen) {
                throw new Error('Database failed to open');
              }
              
              // Now execute the test query
              logger.debug("[Main Electron] [IPC:sqlite-query] Executing test query");
              const testQuery = await ipcRenderer.invoke('sqlite-query', {
                database: 'timesafari',
                statement: 'SELECT * FROM secret;'
              }) as SQLiteQueryResult;
              logger.info("[Main Electron] [IPC:sqlite-query] Test query successful:", { 
                hasResults: Boolean(testQuery?.values),
                resultCount: testQuery?.values?.length,
                results: testQuery?.values
              });
              
              // Close the database
              logger.debug("[Main Electron] [IPC:sqlite-close] Closing database");
              await ipcRenderer.invoke('sqlite-close', {
                database: 'timesafari'
              });
              logger.info("[Main Electron] [IPC:sqlite-close] Database closed successfully");
              
              // Close the connection
              logger.debug("[Main Electron] [IPC:sqlite-close-connection] Closing database connection");
              await ipcRenderer.invoke('sqlite-close-connection', {
                database: 'timesafari'
              });
              logger.info("[Main Electron] [IPC:sqlite-close-connection] Database connection closed successfully");
            } catch (error) {
              logger.error("[Main Electron] [IPC:*] SQLite test operation failed:", {
                error,
                lastOperation: 'sqlite-test-query',
                database: 'timesafari'
              });
              
              // Try to close everything if anything was opened
              try {
                logger.debug("[Main Electron] [IPC:cleanup] Attempting database cleanup after error");
                await ipcRenderer.invoke('sqlite-close', {
                  database: 'timesafari'
                }).catch((closeError) => {
                  logger.warn("[Main Electron] [IPC:sqlite-close] Failed to close database during cleanup:", closeError);
                });
                
                await ipcRenderer.invoke('sqlite-close-connection', {
                  database: 'timesafari'
                }).catch((closeError) => {
                  logger.warn("[Main Electron] [IPC:sqlite-close-connection] Failed to close connection during cleanup:", closeError);
                });
                
                logger.info("[Main Electron] [IPC:cleanup] Database cleanup completed after error");
              } catch (closeError) {
                logger.error("[Main Electron] [IPC:cleanup] Failed to cleanup database:", {
                  error: closeError,
                  database: 'timesafari'
                });
              }
              // Don't reject here - we still want to wait for the ready signal
            }
          }
        })
        .catch((error: Error) => {
          logger.error("[Main Electron] [IPC:sqlite-is-available] Failed to check SQLite availability:", {
            error,
            channel: 'sqlite-is-available'
          });
          // Don't reject here - wait for either ready signal or timeout
        });
    };

    // Start checking for bridge
    checkElectronBridge();
  };

  // Start first initialization attempt
  attemptInitialization();
});

// Wait for SQLite to be ready before initializing router and mounting app
sqliteReady
  .then(async () => {
    logger.info("[Main Electron] SQLite ready, initializing router...");
    
    // Initialize router after SQLite is ready
    const router = await import('./router').then(m => m.default);
    app.use(router);
    logger.info("[Main Electron] Router initialized");
    
    // Now mount the app
    logger.info("[Main Electron] Mounting app...");
    app.mount("#app");
    appIsMounted = true;
    logger.info("[Main Electron] App mounted successfully");
  })
  .catch((error) => {
    logger.error("[Main Electron] Failed to initialize SQLite:", error instanceof Error ? error.message : 'Unknown error');
    // Show error to user with retry option
    const errorDiv = document.createElement("div");
    errorDiv.style.cssText =
      "position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%); background: #ffebee; color: #c62828; padding: 20px; border-radius: 4px; text-align: center; max-width: 80%; z-index: 9999;";
    errorDiv.innerHTML = `
      <h2>Failed to Initialize Application</h2>
      <p>There was an error initializing the database. This could be due to:</p>
      <ul style="text-align: left; margin: 10px 0;">
        <li>Database file is locked by another process</li>
        <li>Insufficient permissions to access the database</li>
        <li>Database file is corrupted</li>
      </ul>
      <p>Error details: ${error instanceof Error ? error.message : 'Unknown error'}</p>
      <div style="margin-top: 15px;">
        <button onclick="window.location.reload()" style="margin: 0 5px; padding: 8px 16px; background: #c62828; color: white; border: none; border-radius: 4px; cursor: pointer;">
          Retry
        </button>
        <button onclick="window.electron.ipcRenderer.send('sqlite-status', { action: 'reset' })" style="margin: 0 5px; padding: 8px 16px; background: #f57c00; color: white; border: none; border-radius: 4px; cursor: pointer;">
          Reset Database
        </button>
      </div>
    `;
    document.body.appendChild(errorDiv);
  });