/**
 * @file Capacitor Main Entry Point
 * @author Matthew Raymer
 *
 * This file initializes the deep linking system for the TimeSafari app.
 * It sets up the connection between Capacitor's URL handling and our deep link processor.
 *
 * Deep Linking Flow:
 * 1. Capacitor receives URL open event
 * 2. Event is passed to DeepLinkHandler
 * 3. URL is validated and processed
 * 4. Router navigates to appropriate view
 *
 * Integration Points:
 * - Capacitor App plugin for URL handling
 * - Vue Router for navigation
 * - Error handling system
 * - Logging system
 *
 * Type Safety:
 * - Uses DeepLinkHandler for type-safe parameter processing
 * - Ensures type safety between Capacitor events and app routing
 * - Maintains type checking through the entire deep link flow
 *
 * @example
 * // URL open event from OS
 * timesafari://claim/123?view=details
 * // Processed and routed to appropriate view with type-safe parameters
 */

import { initializeApp } from "./main.common";
import { App as CapacitorApp } from "@capacitor/app";
import { Capacitor } from "@capacitor/core";
import { Filesystem, Directory, Encoding } from "@capacitor/filesystem";
import router from "./router";
import { handleApiError } from "./services/api";
import { AxiosError } from "axios";
import { DeepLinkHandler } from "./services/deepLinks";
import { logger, safeStringify } from "./utils/logger";
import { PlatformServiceFactory } from "./services/PlatformServiceFactory";
import { SHARED_PHOTO_BASE64_KEY } from "./libs/util";
import "./utils/safeAreaInset";

logger.log("[Capacitor] 🚀 Starting initialization");
logger.log("[Capacitor] Platform:", process.env.VITE_PLATFORM);

const app = initializeApp();

// Initialize API error handling for unhandled promise rejections
window.addEventListener("unhandledrejection", (event) => {
  if (event.reason?.response) {
    handleApiError(event.reason, event.reason.config?.url || "unknown");
  }
});

const deepLinkHandler = new DeepLinkHandler(router);

// Lock to prevent duplicate processing of shared images
let isProcessingSharedImage = false;

/**
 * Polls for file existence with exponential backoff
 * More reliable than hardcoded timeout - checks if file actually exists
 *
 * @param filePath - Path to the file to check
 * @param maxRetries - Maximum number of retry attempts (default: 5)
 * @param initialDelay - Initial delay in milliseconds (default: 100)
 * @returns Promise<boolean> - true if file exists, false if max retries reached
 */
async function pollForFileExistence(
  filePath: string,
  maxRetries: number = 5,
  initialDelay: number = 100,
): Promise<boolean> {
  for (let attempt = 0; attempt < maxRetries; attempt++) {
    try {
      await Filesystem.stat({
        path: filePath,
        directory: Directory.Documents,
      });
      // File exists
      return true;
    } catch (error) {
      // File doesn't exist yet, wait and retry
      if (attempt < maxRetries - 1) {
        // Exponential backoff: 100ms, 200ms, 400ms, 800ms, 1600ms
        const delay = initialDelay * Math.pow(2, attempt);
        logger.debug(
          `[Main] File not found (attempt ${attempt + 1}/${maxRetries}), waiting ${delay}ms...`,
        );
        await new Promise((resolve) => setTimeout(resolve, delay));
      }
    }
  }
  return false;
}

/**
 * Stores shared image data in temp database
 * Handles clearing old data, converting base64 to data URL, and storing
 *
 * @param base64 - Raw base64 string of the image
 * @param fileName - Optional filename for logging
 * @returns Promise<void>
 */
async function storeSharedImageInTempDB(
  base64: string,
  fileName?: string,
): Promise<void> {
  const platformService = PlatformServiceFactory.getInstance();

  // Clear old image from temp DB first to ensure we get the new one
  try {
    await platformService.dbExec("DELETE FROM temp WHERE id = ?", [
      SHARED_PHOTO_BASE64_KEY,
    ]);
    logger.debug("[Main] Cleared old shared image from temp DB");
  } catch (clearError) {
    logger.debug(
      "[Main] No old image to clear (or error clearing):",
      clearError,
    );
  }

  // Convert raw base64 to data URL format that base64ToBlob expects
  // base64ToBlob expects format: "data:image/jpeg;base64,/9j/4AAQ..."
  // Try to detect image type from base64 or default to jpeg
  let mimeType = "image/jpeg"; // default
  if (base64.startsWith("/9j/") || base64.startsWith("iVBORw0KGgo")) {
    // JPEG or PNG
    mimeType = base64.startsWith("/9j/") ? "image/jpeg" : "image/png";
  }
  const dataUrl = `data:${mimeType};base64,${base64}`;

  // Use INSERT OR REPLACE to handle existing records
  await platformService.dbExec(
    "INSERT OR REPLACE INTO temp (id, blobB64) VALUES (?, ?)",
    [SHARED_PHOTO_BASE64_KEY, dataUrl],
  );

  logger.info(`[Main] Stored shared image: ${fileName || "unknown"}`);
}

/**
 * Handles deep link routing for the application
 * Processes URLs in the format timesafari://<route>/<param>
 * Maps incoming deep links to corresponding router paths with parameters
 *
 * @param {Object} data - Deep link data object
 * @param {string} data.url - The full deep link URL to process
 * @returns {Promise<void>}
 *
 * @example
 * // Handles URLs like:
 * // timesafari://claim/01JMAAFZRNSRTQ0EBSD70A8E1H
 * // timesafari://project/abc123
 *
 * @throws {Error} If URL format is invalid
 */
/**
 * Check for native shared image from iOS App Group UserDefaults
 * and store in temp database before routing to shared-photo view
 */
async function checkAndStoreNativeSharedImage(): Promise<{
  success: boolean;
  fileName?: string;
}> {
  // Prevent duplicate processing
  if (isProcessingSharedImage) {
    logger.debug(
      "[Main] ⏸️ Shared image processing already in progress, skipping",
    );
    return { success: false };
  }

  isProcessingSharedImage = true;

  try {
    if (!Capacitor.isNativePlatform() || Capacitor.getPlatform() !== "ios") {
      isProcessingSharedImage = false;
      return { success: false };
    }

    logger.debug("[Main] Checking for iOS shared image from App Group");

    // Use Capacitor's native bridge to call the ShareImagePlugin
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    const capacitor = (window as any).Capacitor;

    if (!capacitor || !capacitor.Plugins) {
      logger.debug("[Main] Capacitor plugins not available");
      isProcessingSharedImage = false;
      return { success: false };
    }

    // WORKAROUND: Since the plugin isn't being auto-discovered, use a temp file bridge
    // AppDelegate writes the shared image data to a temp file, and we read it here
    const tempFilePath = "timesafari_shared_photo.json";

    // Check if file exists first (more reliable than hardcoded timeout)
    const fileExists = await pollForFileExistence(tempFilePath);
    if (fileExists) {
      try {
        const fileContent = await Filesystem.readFile({
          path: tempFilePath,
          directory: Directory.Documents,
          encoding: Encoding.UTF8,
        });

        if (fileContent.data) {
          const sharedData = JSON.parse(fileContent.data as string);
          const base64 = sharedData.base64;
          const fileName = sharedData.fileName || "shared-image.jpg";

          if (base64) {
            // Store in temp database using extracted method
            logger.info(
              "[Main] Native shared image found (via temp file), storing in temp DB",
            );
            await storeSharedImageInTempDB(base64, fileName);

            // Delete the temp file immediately after reading to prevent re-reading
            try {
              await Filesystem.deleteFile({
                path: tempFilePath,
                directory: Directory.Documents,
              });
              logger.debug("[Main] Deleted temp file after reading");
            } catch (deleteError) {
              logger.error("[Main] Failed to delete temp file:", deleteError);
            }

            isProcessingSharedImage = false;
            return { success: true, fileName };
          }
        }
      } catch (fileError: unknown) {
        // File exists but can't be read - log and continue to plugin method
        logger.debug(
          "[Main] Temp file exists but couldn't be read, trying plugin method",
        );
      }
    } else {
      logger.debug(
        "[Main] Temp file not found after polling (this is normal if plugin works)",
      );
    }

    // NOTE: Plugin registration issue - ShareImage plugin is not being auto-discovered
    // This is a known issue that needs to be resolved. For now, we use the temp file workaround above.

    // Try multiple methods to call the plugin (fallback if temp file method fails)
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    const plugins = (capacitor as any).Plugins;
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    const shareImagePlugin = (plugins as any)?.ShareImage;

    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    let result: any = null;

    if (
      shareImagePlugin &&
      typeof shareImagePlugin.getSharedImageData === "function"
    ) {
      logger.debug("[Main] Using direct plugin method");
      try {
        result = await shareImagePlugin.getSharedImageData();
      } catch (pluginError) {
        logger.error("[Main] Plugin call failed:", pluginError);
        isProcessingSharedImage = false;
        return { success: false };
      }
    } else {
      // Method 2: Use Capacitor's execute method
      logger.debug(
        "[Main] Plugin not found directly, trying Capacitor.execute",
      );
      try {
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        const bridge = (capacitor as any).getBridge?.();
        if (bridge) {
          // eslint-disable-next-line @typescript-eslint/no-explicit-any
          result = await bridge.execute({
            pluginId: "ShareImage",
            methodName: "getSharedImageData",
            options: {},
          });
        } else {
          // Method 3: Try execute on Plugins object
          // eslint-disable-next-line @typescript-eslint/no-explicit-any
          if ((plugins as any)?.execute) {
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            result = await (plugins as any).execute(
              "ShareImage",
              "getSharedImageData",
              {},
            );
          }
        }
      } catch (executeError) {
        logger.error("[Main] Execute method failed:", executeError);
        isProcessingSharedImage = false;
        return { success: false };
      }
    }

    if (!result || !result.success || !result.data) {
      logger.debug("[Main] No shared image data found in result");
      isProcessingSharedImage = false;
      return { success: false };
    }

    const { base64, fileName } = result.data;

    if (!base64) {
      logger.debug("[Main] Shared image data missing base64");
      isProcessingSharedImage = false;
      return { success: false };
    }

    logger.info("[Main] Native shared image found, storing in temp DB");

    // Store in temp database using extracted method
    await storeSharedImageInTempDB(base64, fileName);

    isProcessingSharedImage = false;
    return { success: true, fileName: fileName || "shared-image.jpg" };
  } catch (error) {
    logger.error("[Main] Error checking for native shared image:", error);
    isProcessingSharedImage = false;
    return { success: false };
  }
}

const handleDeepLink = async (data: { url: string }) => {
  const { url } = data;
  logger.debug(`[Main] 🌐 Deeplink received from Capacitor: ${url}`);

  try {
    // Handle empty path URLs from share extension (timesafari://)
    // These are used to open the app, and we should check for shared images
    const isEmptyPathUrl = url === "timesafari://" || url === "timesafari:///";

    if (
      isEmptyPathUrl &&
      Capacitor.isNativePlatform() &&
      Capacitor.getPlatform() === "ios"
    ) {
      logger.debug(
        "[Main] 📸 Empty path URL from share extension, checking for native shared image",
      );

      // Try to get shared image from App Group and store in temp database
      // AppDelegate writes the file when the deep link is received, so we may need to retry
      // The checkAndStoreNativeSharedImage function now uses polling internally, so we just call it once
      try {
        const imageResult = await checkAndStoreNativeSharedImage();

        if (imageResult.success) {
          logger.info(
            "[Main] ✅ Native shared image found, navigating to shared-photo",
          );

          // Wait for router to be ready
          await router.isReady();

          // Navigate directly to shared-photo route
          // Use replace if already on shared-photo to force refresh, otherwise push
          const fileName = imageResult.fileName || "shared-image.jpg";
          const isAlreadyOnSharedPhoto =
            router.currentRoute.value.path === "/shared-photo";

          if (isAlreadyOnSharedPhoto) {
            // Force refresh by replacing the route
            await router.replace({
              path: "/shared-photo",
              query: { fileName, _refresh: Date.now().toString() }, // Add timestamp to force update
            });
          } else {
            await router.push({
              path: "/shared-photo",
              query: { fileName },
            });
          }

          logger.info(
            `[Main] ✅ Navigated to /shared-photo?fileName=${fileName}`,
          );
          return; // Exit early, don't process as deep link
        } else {
          logger.debug(
            "[Main] ℹ️ No native shared image found, ignoring empty path URL",
          );
          return; // Exit early, don't process empty path as deep link
        }
      } catch (error) {
        logger.error("[Main] Error processing native shared image:", error);
        // If check fails, don't process as deep link (empty path would fail validation anyway)
        return;
      }
    }

    // Wait for router to be ready
    logger.debug(`[Main] ⏳ Waiting for router to be ready...`);
    await router.isReady();
    logger.debug(`[Main] ✅ Router is ready, processing deeplink`);

    // Process the deeplink
    logger.debug(`[Main] 🚀 Starting deeplink processing`);
    await deepLinkHandler.handleDeepLink(url);
    logger.debug(`[Main] ✅ Deeplink processed successfully`);
  } catch (error) {
    logger.error(`[Main] ❌ Deeplink processing failed:`, {
      url,
      error: error instanceof Error ? error.message : String(error),
      stack: error instanceof Error ? error.stack : undefined,
      timestamp: new Date().toISOString(),
    });

    // Log additional context for debugging
    logger.error(`[Main] 🔍 Debug context:`, {
      routerReady: router.isReady(),
      currentRoute: router.currentRoute.value,
      appMounted: app._instance?.isMounted,
      timestamp: new Date().toISOString(),
    });

    // Fallback to original error handling
    let message: string =
      error instanceof Error ? error.message : safeStringify(error);
    if (url) {
      message += `\nURL: ${url}`;
    }
    handleApiError({ message } as AxiosError, "deep-link");
  }
};

// Function to register the deeplink listener
const registerDeepLinkListener = async () => {
  try {
    logger.info(
      `[Main] 🔗 Attempting to register deeplink handler with Capacitor`,
    );

    // Check if Capacitor App plugin is available
    logger.debug(`[Main] 🔍 Checking Capacitor App plugin availability...`);
    if (!CapacitorApp) {
      throw new Error("Capacitor App plugin not available");
    }
    logger.info(`[Main] ✅ Capacitor App plugin is available`);

    // Check available methods on CapacitorApp
    logger.debug(
      `[Main] 🔍 Capacitor App plugin methods:`,
      Object.getOwnPropertyNames(CapacitorApp),
    );
    logger.debug(
      `[Main] 🔍 Capacitor App plugin addListener method:`,
      typeof CapacitorApp.addListener,
    );

    // Wait for router to be ready first
    await router.isReady();
    logger.debug(
      `[Main] ✅ Router is ready, proceeding with listener registration`,
    );

    // Try to register the listener
    logger.info(`[Main] 🧪 Attempting to register appUrlOpen listener...`);
    const listenerHandle = await CapacitorApp.addListener(
      "appUrlOpen",
      handleDeepLink,
    );
    logger.info(
      `[Main] ✅ appUrlOpen listener registered successfully with handle:`,
      listenerHandle,
    );

    return listenerHandle;
  } catch (error) {
    logger.error(`[Main] ❌ Failed to register deeplink listener:`, {
      error: error instanceof Error ? error.message : String(error),
      stack: error instanceof Error ? error.stack : undefined,
      timestamp: new Date().toISOString(),
    });
    throw error;
  }
};

/**
 * Check for shared image and navigate to shared-photo route if found
 * This is called when app becomes active (from share extension or app launch)
 */
async function checkForSharedImageAndNavigate() {
  if (!Capacitor.isNativePlatform() || Capacitor.getPlatform() !== "ios") {
    return;
  }

  try {
    logger.debug("[Main] 🔍 Checking for shared image on app activation");
    const imageResult = await checkAndStoreNativeSharedImage();

    if (imageResult.success) {
      logger.info(
        "[Main] ✅ Shared image found, navigating to shared-photo route",
      );

      // Wait for router to be ready
      await router.isReady();

      // Navigate to shared-photo route with fileName if available
      // Use replace if already on shared-photo to force refresh, otherwise push
      const fileName = imageResult.fileName || "shared-image.jpg";
      const isAlreadyOnSharedPhoto =
        router.currentRoute.value.path === "/shared-photo";

      if (isAlreadyOnSharedPhoto) {
        // Force refresh by replacing the route
        await router.replace({
          path: "/shared-photo",
          query: { fileName, _refresh: Date.now().toString() }, // Add timestamp to force update
        });
      } else {
        const route = imageResult.fileName
          ? `/shared-photo?fileName=${encodeURIComponent(imageResult.fileName)}`
          : "/shared-photo";
        await router.push(route);
      }

      logger.info(`[Main] ✅ Navigated to /shared-photo?fileName=${fileName}`);
    } else {
      logger.debug("[Main] ℹ️ No shared image found");
    }
  } catch (error) {
    logger.error("[Main] ❌ Error checking for shared image:", error);
  }
}

logger.log("[Capacitor] 🚀 Mounting app");
app.mount("#app");
logger.info(`[Main] ✅ App mounted successfully`);

// Check for shared image on initial load (in case app was launched from share extension)
if (Capacitor.isNativePlatform() && Capacitor.getPlatform() === "ios") {
  setTimeout(async () => {
    await checkForSharedImageAndNavigate();
  }, 1000); // Small delay to ensure router is ready
}

// Listen for app state changes to detect when app becomes active
if (Capacitor.isNativePlatform() && Capacitor.getPlatform() === "ios") {
  CapacitorApp.addListener("appStateChange", async ({ isActive }) => {
    if (isActive) {
      logger.debug("[Main] 📱 App became active, checking for shared image");
      await checkForSharedImageAndNavigate();
    }
  });
}

// Register deeplink listener after app is mounted
setTimeout(async () => {
  try {
    logger.info(
      `[Main] ⏳ Delaying listener registration to ensure Capacitor is ready...`,
    );
    await registerDeepLinkListener();
    logger.info(`[Main] 🎉 Deep link system fully initialized!`);
  } catch (error) {
    logger.error(`[Main] ❌ Deep link system initialization failed:`, error);
  }
}, 2000); // 2 second delay to ensure Capacitor is fully ready

// Log app initialization status
setTimeout(() => {
  logger.info(`[Main] 📊 App initialization status:`, {
    routerReady: router.isReady(),
    currentRoute: router.currentRoute.value,
    appMounted: app._instance?.isMounted,
    timestamp: new Date().toISOString(),
  });
}, 1000);