"use client";

import type { AnalyticsEvent, AnalyticsProvider, UserData } from "../core/types";

declare global {
  interface Window {
    rybbit?: {
      event: (eventName: string, eventData?: Record<string, any>) => void;
      pageview: () => void;
    };
  }
}

type QueuedEvent = {
  eventName: string;
  properties?: Record<string, unknown>;
};

export class RybbitProvider implements AnalyticsProvider {
  name = "Rybbit";
  private isClient: boolean;
  private eventQueue: QueuedEvent[] = [];
  private flushInterval: ReturnType<typeof setInterval> | null = null;
  private initialized = false;

  constructor() {
    this.isClient = typeof window !== "undefined";
    
    if (this.isClient) {
      console.log("[RybbitProvider] Constructor called");
      // Start checking for rybbit availability
      this.startFlushInterval();
      
      // Also try to flush immediately in case script is already loaded
      setTimeout(() => this.tryFlushQueue(), 100);
    }
  }

  private startFlushInterval() {
    // Check every 500ms for up to 15 seconds
    let attempts = 0;
    const maxAttempts = 30;
    
    this.flushInterval = setInterval(() => {
      attempts++;
      const available = this.isAvailable();
      
      if (available && !this.initialized) {
        console.log("[RybbitProvider] Script became available, flushing queue");
        this.initialized = true;
      }
      
      this.tryFlushQueue();
      
      if (available || attempts >= maxAttempts) {
        this.stopFlushInterval();
        if (attempts >= maxAttempts && !available) {
          console.warn("[RybbitProvider] Max attempts reached, script not loaded. Queue size:", this.eventQueue.length);
        }
      }
    }, 500);
  }

  private stopFlushInterval() {
    if (this.flushInterval) {
      clearInterval(this.flushInterval);
      this.flushInterval = null;
    }
  }

  private tryFlushQueue() {
    if (!this.isAvailable() || this.eventQueue.length === 0) {
      return;
    }

    console.log(`[RybbitProvider] Flushing ${this.eventQueue.length} queued events`);
    
    // Flush all queued events
    while (this.eventQueue.length > 0) {
      const event = this.eventQueue.shift();
      if (event) {
        this.sendEvent(event.eventName, event.properties);
      }
    }
  }

  isAvailable(): boolean {
    return this.isClient && typeof window.rybbit?.event === "function";
  }

  private sendEvent(eventName: string, properties?: Record<string, unknown>): void {
    try {
      window.rybbit!.event(eventName, properties);
      console.log(`[Rybbit] Event sent: ${eventName}`);
    } catch (e) {
      console.warn(`[Rybbit] Tracking error for ${eventName}:`, e);
    }
  }

  private trackEvent(eventName: string, properties?: Record<string, unknown>): void {
    if (!this.isClient) return;

    if (this.isAvailable()) {
      this.sendEvent(eventName, properties);
    } else {
      // Queue the event for later
      this.eventQueue.push({ eventName, properties });
      console.log(`[Rybbit] Queued event: ${eventName}, queue size: ${this.eventQueue.length}`);
    }
  }

  track(event: AnalyticsEvent): void {
    switch (event.type) {
      case "product_viewed":
        this.trackEvent("product_view", {
          product_id: event.product.id,
          product_name: event.product.name,
          price: event.product.price,
          currency: event.product.currency,
          category: event.product.category,
          variant: event.product.variant,
        });
        break;

      case "add_to_cart":
        this.trackEvent("add_to_cart", {
          product_id: event.product.id,
          product_name: event.product.name,
          price: event.product.price,
          currency: event.product.currency,
          quantity: event.product.quantity,
          variant: event.product.variant,
        });
        break;

      case "remove_from_cart":
        this.trackEvent("remove_from_cart", {
          product_id: event.product.id,
          product_name: event.product.name,
          quantity: event.product.quantity,
        });
        break;

      case "cart_view":
        this.trackEvent("cart_view", {
          cart_total: event.cart.total,
          currency: event.cart.currency,
          item_count: event.cart.item_count,
        });
        break;

      case "checkout_started":
        this.trackEvent("checkout_started", {
          cart_total: event.cart.total,
          currency: event.cart.currency,
          item_count: event.cart.item_count,
          items: event.cart.items,
        });
        break;

      case "checkout_step":
        this.trackEvent("checkout_step", {
          step: event.step,
          ...event.data,
        });
        break;

      case "order_completed":
        this.trackEvent("order_completed", {
          order_id: event.order.order_id,
          order_number: event.order.order_number,
          total: event.order.total,
          currency: event.order.currency,
          item_count: event.order.item_count,
          shipping_cost: event.order.shipping_cost,
          coupon_code: event.order.coupon_code,
          customer_email: event.order.customer_email,
          payment_method: event.order.payment_method,
          revenue: event.order.total,
        });
        break;

      case "search":
        this.trackEvent("search", {
          query: event.query,
          results_count: event.results_count,
        });
        break;

      case "external_link_click":
        this.trackEvent("external_link_click", {
          url: event.url,
          label: event.label,
        });
        break;

      case "wishlist_add":
        this.trackEvent("wishlist_add", {
          product_id: event.product.id,
          product_name: event.product.name,
        });
        break;

      case "user_login":
        this.trackEvent("user_login", {
          method: event.method,
        });
        break;

      case "user_register":
        this.trackEvent("user_register", {
          method: event.method,
        });
        break;

      case "newsletter_signup":
        this.trackEvent("newsletter_signup", {
          email: event.email,
          source: event.source,
        });
        break;
    }
  }

  identify(_user: UserData): void {
    // Rybbit doesn't have explicit identify - it's handled automatically via cookies
  }

  revenue?(_amount: number, _currency: string, _properties?: Record<string, unknown>): Promise<void> {
    // Revenue is tracked via order_completed event
    return Promise.resolve();
  }
}