import apiClient from './client';
import { type ProposalDetail } from './proposals';

export interface DashboardStats {
  pendingCount: number;
  approvedThisWeek: number;
  avgTurnaroundHours: number;
  totalProposals: number;
}

export interface UpdateProposalRequest {
  refinedScope?: string;
  notes?: string;
  poNumber?: string;
  workOrderNumber?: string;
  assignedAdminId?: string;
}

export interface AuditEntry {
  id: string;
  proposalId: string | null;
  userId: string;
  userName: string;
  action: string;
  details: string | null;
  timestamp: string;
  ipAddress: string | null;
}

export const adminApi = {
  getDashboard: async (): Promise<DashboardStats> => {
    const res = await apiClient.get('/admin/dashboard');
    return res.data;
  },

  updateProposal: async (id: string, data: UpdateProposalRequest): Promise<void> => {
    await apiClient.put(`/proposals/${id}`, data);
  },

  approveProposal: async (id: string): Promise<void> => {
    await apiClient.post(`/proposals/${id}/approve`);
  },

  returnToReview: async (id: string): Promise<void> => {
    await apiClient.post(`/proposals/${id}/return-to-review`);
  },

  sendProposal: async (id: string): Promise<void> => {
    await apiClient.post(`/proposals/${id}/send`);
  },

  reviseProposal: async (id: string): Promise<void> => {
    await apiClient.post(`/proposals/${id}/revise`);
  },

  getHistory: async (id: string): Promise<ProposalDetail[]> => {
    const res = await apiClient.get(`/proposals/${id}/history`);
    return res.data;
  },

  getAudit: async (id: string): Promise<AuditEntry[]> => {
    const res = await apiClient.get(`/proposals/${id}/audit`);
    return res.data;
  },

  generateSuggestions: async (id: string): Promise<void> => {
    await apiClient.post(`/proposals/${id}/generate-suggestions`);
  },

  getSimilar: async (id: string): Promise<unknown[]> => {
    const res = await apiClient.get(`/proposals/${id}/similar`);
    return res.data;
  },

  getPdf: async (id: string, regenerate = false): Promise<{ downloadUrl: string } | null> => {
    const params = regenerate ? '?regenerate=true' : '';
    const res = await apiClient.get(`/proposals/${id}/pdf${params}`, {
      responseType: 'blob',
      validateStatus: (status) => status < 500,
    });
    if (res.status === 202) return null;
    const blob = res.data as Blob;
    const downloadUrl = URL.createObjectURL(blob);
    return { downloadUrl };
  },
};