// ============================================================================
// Demo Mode Hooks
// ============================================================================

import { useWorkspace } from "@/components/providers/workspace-provider";
import { demoApi } from "./api";
import {
  demoChannels,
  demoCreatives,
  demoPlacements,
  demoPurchasePlanChannels,
  demoSpendingAnalytics,
  demoCreativeAnalytics,
  demoChannelAnalytics,
} from "./mock-data";
import type {
  Channel,
  Creative,
  Placement,
  PurchasePlanChannel,
  SpendingAnalytics,
  CreativeAnalyticsItem,
  ChannelAnalyticsItem,
  PaginatedResponse,
} from "@/lib/types/api";

// ============================================================================
// Types
// ============================================================================

interface UseDemoDataResult<T> {
  data: T | null;
  isDemo: boolean;
}

// ============================================================================
// Hook: Check if should use demo mode
// ============================================================================

export const useIsDemoMode = (): boolean => {
  const { isDemoMode } = useWorkspace();
  return isDemoMode;
};

// ============================================================================
// Hook: Get demo channels
// ============================================================================

export const useDemoChannels = (): UseDemoDataResult<PaginatedResponse<Channel>> => {
  const { isDemoMode } = useWorkspace();
  
  if (isDemoMode) {
    return {
      data: {
        items: demoChannels,
        total: demoChannels.length,
        page: 1,
        size: 50,
        pages: 1,
      },
      isDemo: true,
    };
  }
  
  return { data: null, isDemo: false };
};

// ============================================================================
// Hook: Get demo creatives
// ============================================================================

export const useDemoCreatives = (
  projectId?: string
): UseDemoDataResult<PaginatedResponse<Creative>> => {
  const { isDemoMode } = useWorkspace();
  
  if (isDemoMode) {
    let items = demoCreatives;
    if (projectId) {
      items = items.filter((c) => c.project_id === projectId);
    }
    
    return {
      data: {
        items,
        total: items.length,
        page: 1,
        size: 50,
        pages: 1,
      },
      isDemo: true,
    };
  }
  
  return { data: null, isDemo: false };
};

// ============================================================================
// Hook: Get demo placements
// ============================================================================

export const useDemoPlacements = (
  projectId?: string
): UseDemoDataResult<PaginatedResponse<Placement>> => {
  const { isDemoMode } = useWorkspace();
  
  if (isDemoMode) {
    let items = demoPlacements;
    if (projectId) {
      items = items.filter((p) => p.project_id === projectId);
    }
    
    return {
      data: {
        items,
        total: items.length,
        page: 1,
        size: 50,
        pages: 1,
      },
      isDemo: true,
    };
  }
  
  return { data: null, isDemo: false };
};

// ============================================================================
// Hook: Get demo purchase plan
// ============================================================================

export const useDemoPurchasePlan = (
  projectId: string
): UseDemoDataResult<PaginatedResponse<PurchasePlanChannel>> => {
  const { isDemoMode } = useWorkspace();
  
  if (isDemoMode) {
    const items = demoPurchasePlanChannels[projectId] || [];
    
    return {
      data: {
        items,
        total: items.length,
        page: 1,
        size: 50,
        pages: 1,
      },
      isDemo: true,
    };
  }
  
  return { data: null, isDemo: false };
};

// ============================================================================
// Hook: Get demo spending analytics
// ============================================================================

export const useDemoSpendingAnalytics = (
  projectId?: string
): UseDemoDataResult<SpendingAnalytics> => {
  const { isDemoMode } = useWorkspace();
  
  if (isDemoMode) {
    if (projectId) {
      // Filter by project
      const projectPlacements = demoPlacements.filter(
        (p) => p.project_id === projectId && p.status === "active"
      );
      const totalCost = projectPlacements.reduce(
        (sum, p) => sum + (p.cost || 0),
        0
      );
      const totalSubs = projectPlacements.reduce(
        (sum, p) => sum + (p.subscriptions_count || 0),
        0
      );
      const totalViews = projectPlacements.reduce(
        (sum, p) => sum + (p.views_count || 0),
        0
      );

      return {
        data: {
          total_cost: totalCost,
          total_subscriptions: totalSubs,
          total_views: totalViews,
          avg_cpf: totalSubs > 0 ? totalCost / totalSubs : null,
          avg_cpm: totalViews > 0 ? (totalCost / totalViews) * 1000 : null,
          chart_data: demoSpendingAnalytics.chart_data.slice(0, 3),
        },
        isDemo: true,
      };
    }
    
    return {
      data: demoSpendingAnalytics,
      isDemo: true,
    };
  }
  
  return { data: null, isDemo: false };
};

// ============================================================================
// Hook: Get demo creative analytics
// ============================================================================

export const useDemoCreativeAnalytics = (
  projectId?: string
): UseDemoDataResult<PaginatedResponse<CreativeAnalyticsItem>> => {
  const { isDemoMode } = useWorkspace();
  
  if (isDemoMode) {
    let items = demoCreativeAnalytics;
    if (projectId) {
      const projectCreativeIds = demoCreatives
        .filter((c) => c.project_id === projectId)
        .map((c) => c.id);
      items = items.filter((a) => projectCreativeIds.includes(a.id));
    }
    
    return {
      data: {
        items,
        total: items.length,
        page: 1,
        size: 50,
        pages: 1,
      },
      isDemo: true,
    };
  }
  
  return { data: null, isDemo: false };
};

// ============================================================================
// Hook: Get demo channel analytics
// ============================================================================

export const useDemoChannelAnalytics = (
  projectId?: string
): UseDemoDataResult<PaginatedResponse<ChannelAnalyticsItem>> => {
  const { isDemoMode } = useWorkspace();
  
  if (isDemoMode) {
    let items = demoChannelAnalytics;
    if (projectId) {
      const projectPlacementChannelIds = new Set(
        demoPlacements
          .filter((p) => p.project_id === projectId)
          .map((p) => p.placement_channel_id)
      );
      items = items.filter((a) => projectPlacementChannelIds.has(a.channel_id));
    }
    
    return {
      data: {
        items,
        total: items.length,
        page: 1,
        size: 50,
        pages: 1,
      },
      isDemo: true,
    };
  }
  
  return { data: null, isDemo: false };
};