// ============================================================================
// Demo-Aware API Wrapper
// ============================================================================
// This wrapper checks if the workspace is demo and returns mock data instead

import { isDemoWorkspace, DEMO_WORKSPACE_ID } from "./constants";
import {
  demoChannels,
  demoCreatives,
  demoPlacements,
  demoPurchasePlanChannels,
  demoSpendingAnalytics,
  demoCreativeAnalytics,
  demoChannelAnalytics,
  demoProjects,
  demoWorkspace,
  demoMember,
} from "./mock-data";
import type {
  PaginatedResponse,
  Channel,
  Creative,
  Placement,
  PurchasePlanChannel,
  SpendingAnalytics,
  CreativeAnalyticsItem,
  ChannelAnalyticsItem,
  Project,
  Workspace,
  WorkspaceMember,
  DateGrouping,
} from "@/lib/types/api";
import {
  workspacesApi,
  projectsApi,
  channelsApi,
  creativesApi,
  placementsApi,
  purchasePlanApi,
  analyticsApi,
  membersApi,
} from "@/lib/api";

// ============================================================================
// Helper
// ============================================================================

const paginate = <T>(items: T[], page = 1, size = 50): PaginatedResponse<T> => ({
  items: items.slice((page - 1) * size, page * size),
  total: items.length,
  page,
  size,
  pages: Math.ceil(items.length / size),
});

// ============================================================================
// Demo-Aware Workspaces API
// ============================================================================

export const demoAwareWorkspacesApi = {
  list: async (params?: { page?: number; size?: number }) => {
    // Always include demo workspace in list for demo mode
    return workspacesApi.list(params);
  },
  get: async (workspaceId: string): Promise<Workspace> => {
    if (isDemoWorkspace(workspaceId)) {
      return demoWorkspace;
    }
    // Workspaces API doesn't have get method, fetch from list
    const response = await workspacesApi.list({ size: 100 });
    const workspace = response.items.find(w => w.id === workspaceId);
    if (!workspace) throw new Error("Workspace not found");
    return workspace;
  },
};

// ============================================================================
// Demo-Aware Projects API
// ============================================================================

export const demoAwareProjectsApi = {
  list: async (
    workspaceId: string,
    params?: { page?: number; size?: number }
  ): Promise<PaginatedResponse<Project>> => {
    if (isDemoWorkspace(workspaceId)) {
      return paginate(demoProjects, params?.page, params?.size);
    }
    return projectsApi.list(workspaceId, params);
  },
};

// ============================================================================
// Demo-Aware Members API
// ============================================================================

export const demoAwareMembersApi = {
  list: async (
    workspaceId: string,
    params?: { page?: number; size?: number }
  ): Promise<PaginatedResponse<WorkspaceMember>> => {
    if (isDemoWorkspace(workspaceId)) {
      return paginate([demoMember], params?.page, params?.size);
    }
    return membersApi.list(workspaceId, params);
  },
};

// ============================================================================
// Demo-Aware Channels API
// ============================================================================

export const demoAwareChannelsApi = {
  list: async (params?: {
    page?: number;
    size?: number;
    username?: string;
  }): Promise<PaginatedResponse<Channel>> => {
    // Channels are global, check if we're in demo context via some mechanism
    // For now, always return real data - demo channels are handled per-workspace
    return channelsApi.list(params);
  },
  listForDemo: (): PaginatedResponse<Channel> => {
    return paginate(demoChannels);
  },
};

// ============================================================================
// Demo-Aware Creatives API
// ============================================================================

export const demoAwareCreativesApi = {
  list: async (
    workspaceId: string,
    params?: {
      project_id?: string;
      include_archived?: boolean;
      page?: number;
      size?: number;
    }
  ): Promise<PaginatedResponse<Creative>> => {
    if (isDemoWorkspace(workspaceId)) {
      let items = demoCreatives;
      if (params?.project_id) {
        items = items.filter((c) => c.project_id === params.project_id);
      }
      if (!params?.include_archived) {
        items = items.filter((c) => c.status === "active");
      }
      return paginate(items, params?.page, params?.size);
    }
    return creativesApi.list(workspaceId, params);
  },
  get: async (workspaceId: string, creativeId: string): Promise<Creative> => {
    if (isDemoWorkspace(workspaceId)) {
      const creative = demoCreatives.find((c) => c.id === creativeId);
      if (!creative) throw new Error("Creative not found");
      return creative;
    }
    return creativesApi.get(workspaceId, creativeId);
  },
};

// ============================================================================
// Demo-Aware Placements API
// ============================================================================

export const demoAwarePlacementsApi = {
  list: async (
    workspaceId: string,
    params?: {
      project_id?: string;
      placement_channel_id?: string;
      creative_id?: string;
      include_archived?: boolean;
      page?: number;
      size?: number;
    }
  ): Promise<PaginatedResponse<Placement>> => {
    if (isDemoWorkspace(workspaceId)) {
      let items = demoPlacements;
      if (params?.project_id) {
        items = items.filter((p) => p.project_id === params.project_id);
      }
      if (params?.placement_channel_id) {
        items = items.filter(
          (p) => p.placement_channel_id === params.placement_channel_id
        );
      }
      if (params?.creative_id) {
        items = items.filter((p) => p.creative_id === params.creative_id);
      }
      if (!params?.include_archived) {
        items = items.filter((p) => p.status === "active");
      }
      return paginate(items, params?.page, params?.size);
    }
    return placementsApi.list(workspaceId, params);
  },
  get: async (workspaceId: string, placementId: string): Promise<Placement> => {
    if (isDemoWorkspace(workspaceId)) {
      const placement = demoPlacements.find((p) => p.id === placementId);
      if (!placement) throw new Error("Placement not found");
      return placement;
    }
    return placementsApi.get(workspaceId, placementId);
  },
};

// ============================================================================
// Demo-Aware Purchase Plan API
// ============================================================================

export const demoAwarePurchasePlanApi = {
  list: async (
    workspaceId: string,
    projectId: string,
    params?: { page?: number; size?: number }
  ): Promise<PaginatedResponse<PurchasePlanChannel>> => {
    if (isDemoWorkspace(workspaceId)) {
      const items = demoPurchasePlanChannels[projectId] || [];
      return paginate(items, params?.page, params?.size);
    }
    return purchasePlanApi.list(workspaceId, projectId, params);
  },
};

// ============================================================================
// Demo-Aware Analytics API
// ============================================================================

export const demoAwareAnalyticsApi = {
  spending: async (
    workspaceId: string,
    params?: {
      project_id?: string;
      date_from?: string;
      date_to?: string;
      grouping?: DateGrouping;
    }
  ): Promise<SpendingAnalytics> => {
    if (isDemoWorkspace(workspaceId)) {
      if (params?.project_id) {
        const projectPlacements = demoPlacements.filter(
          (p) => p.project_id === params.project_id && 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 {
          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, 4),
        };
      }
      return demoSpendingAnalytics;
    }
    return analyticsApi.spending(workspaceId, params);
  },
  creatives: async (
    workspaceId: string,
    params?: { project_id?: string; page?: number; size?: number }
  ): Promise<PaginatedResponse<CreativeAnalyticsItem>> => {
    if (isDemoWorkspace(workspaceId)) {
      let items = demoCreativeAnalytics;
      if (params?.project_id) {
        const projectCreativeIds = demoCreatives
          .filter((c) => c.project_id === params.project_id)
          .map((c) => c.id);
        items = items.filter((a) => projectCreativeIds.includes(a.id));
      }
      return paginate(items, params?.page, params?.size);
    }
    return analyticsApi.creatives(workspaceId, params);
  },
  channels: async (
    workspaceId: string,
    params?: { project_id?: string; page?: number; size?: number }
  ): Promise<PaginatedResponse<ChannelAnalyticsItem>> => {
    if (isDemoWorkspace(workspaceId)) {
      let items = demoChannelAnalytics;
      if (params?.project_id) {
        const projectPlacementChannelIds = new Set(
          demoPlacements
            .filter((p) => p.project_id === params.project_id)
            .map((p) => p.placement_channel_id)
        );
        items = items.filter((a) =>
          projectPlacementChannelIds.has(a.channel_id)
        );
      }
      return paginate(items, params?.page, params?.size);
    }
    return analyticsApi.channels(workspaceId, params);
  },
};