import apiClient from './client';

// Fix: WEB-M5 — align with shared contract types (shared/api-contracts/src/index.ts)
export type ServiceCategory = 'HVAC' | 'Plumbing' | 'Electrical' | 'General' | 'Renovation';
export type Priority = 'Standard' | 'Urgent' | 'Emergency';

export interface CreateProposalRequest {
  workOrderNumber: string;
  poNumber?: string;
  customerName: string;
  customerAddress: string;
  scopeOfWork: string;
  serviceCategory: ServiceCategory;
  priority: Priority;
  notes?: string;
}

export interface ProposalListItem {
  id: string;
  proposalNumber: string;
  customerName: string;
  workOrderNumber: string;
  serviceCategory: string;
  priority: string;
  status: string;
  totalBidAmount: number;
  submittedAt: string;
  submittedByName: string | null;
  assignedAdminName: string | null;
}

export interface ProposalDetail {
  id: string;
  proposalNumber: string;
  workOrderNumber: string;
  poNumber: string | null;
  customerName: string;
  customerAddress: string;
  scopeOfWork: string;
  refinedScope: string | null;
  serviceCategory: string;
  priority: string;
  status: string;
  totalBidAmount: number;
  vendorTotalCost: number | null;
  notes: string;
  submittedById: string;
  submittedByName: string | null;
  submittedAt: string;
  assignedAdminId: string | null;
  approvedById: string | null;
  approvedAt: string | null;
  sentAt: string | null;
  currentRevision: number;
  parentProposalId: string | null;
  createdAt: string;
  updatedAt: string;
}

export interface PagedResponse<T> {
  items: T[];
  totalCount: number;
  page: number;
  pageSize: number;
}

export interface ProposalFilters {
  search?: string;
  page?: number;
  pageSize?: number;
  status?: string;
  serviceCategory?: string;
  priority?: string;
  fromDate?: string;
  toDate?: string;
  mine?: boolean;
}

export const proposalsApi = {
  create: async (data: CreateProposalRequest): Promise<ProposalDetail> => {
    const res = await apiClient.post('/proposals', data);
    return res.data;
  },

  getAll: async (filters: ProposalFilters = {}): Promise<PagedResponse<ProposalListItem>> => {
    const params = new URLSearchParams();
    if (filters.search) params.append('search', filters.search);
    if (filters.page) params.append('page', String(filters.page));
    if (filters.pageSize) params.append('pageSize', String(filters.pageSize));
    if (filters.status) params.append('status', filters.status);
    if (filters.serviceCategory) params.append('serviceCategory', filters.serviceCategory);
    if (filters.priority) params.append('priority', filters.priority);
    if (filters.fromDate) params.append('fromDate', filters.fromDate);
    if (filters.toDate) params.append('toDate', filters.toDate);
    if (filters.mine) params.append('mine', 'true');

    const res = await apiClient.get(`/proposals?${params.toString()}`);
    return res.data;
  },

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

  uploadAttachment: async (proposalId: string, fileName: string, vendorName?: string): Promise<{ uploadUrl: string; s3Key: string; vendorProposalId: string }> => {
    const params = new URLSearchParams({ fileName });
    if (vendorName) params.append('vendorName', vendorName);
    const res = await apiClient.post(`/proposals/${proposalId}/attachments?${params.toString()}`);
    return res.data;
  },

  confirmUpload: async (proposalId: string, vendorProposalId: string): Promise<void> => {
    await apiClient.post(`/proposals/${proposalId}/attachments/${vendorProposalId}/confirm`);
  },

  getStats: async (): Promise<ProposalStats> => {
    const res = await apiClient.get('/proposals/stats');
    return res.data;
  },

  getPdf: async (id: string): Promise<{ downloadUrl: string } | null> => {
    const res = await apiClient.get(`/proposals/${id}/pdf`, {
      responseType: 'blob',
      validateStatus: (status) => status < 500,
    });
    if (res.status === 404) return null;
    const blob = res.data as Blob;
    const downloadUrl = URL.createObjectURL(blob);
    return { downloadUrl };
  },

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

  getPdfRevision: async (id: string, revision: number): Promise<{ downloadUrl: string } | null> => {
    const res = await apiClient.get(`/proposals/${id}/pdf/${revision}`, {
      responseType: 'blob',
      validateStatus: (status) => status < 500,
    });
    if (res.status === 404) return null;
    const blob = res.data as Blob;
    const downloadUrl = URL.createObjectURL(blob);
    return { downloadUrl };
  },
};

export interface ProposalStats {
  totalCount: number;
  inReviewCount: number;
  approvedCount: number;
  sentCount: number;
}

export interface PdfVersion {
  revision: number;
  generatedAt: string;
}