import { Project, Package, Tag, Artifact, UploadResponse } from './types';

const API_BASE = '/api/v1';

async function handleResponse<T>(response: Response): Promise<T> {
  if (!response.ok) {
    const error = await response.json().catch(() => ({ detail: 'Unknown error' }));
    throw new Error(error.detail || `HTTP ${response.status}`);
  }
  return response.json();
}

// Paginated response type
interface PaginatedResponse<T> {
  items: T[];
  pagination: {
    page: number;
    limit: number;
    total: number;
    total_pages: number;
  };
}

// Project API
export async function listProjects(): Promise<Project[]> {
  const response = await fetch(`${API_BASE}/projects`);
  const data = await handleResponse<PaginatedResponse<Project>>(response);
  return data.items;
}

export async function createProject(data: { name: string; description?: string; is_public?: boolean }): Promise<Project> {
  const response = await fetch(`${API_BASE}/projects`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(data),
  });
  return handleResponse<Project>(response);
}

export async function getProject(name: string): Promise<Project> {
  const response = await fetch(`${API_BASE}/projects/${name}`);
  return handleResponse<Project>(response);
}

// Package API
export async function listPackages(projectName: string): Promise<Package[]> {
  const response = await fetch(`${API_BASE}/project/${projectName}/packages`);
  const data = await handleResponse<PaginatedResponse<Package>>(response);
  return data.items;
}

export async function createPackage(projectName: string, data: { name: string; description?: string }): Promise<Package> {
  const response = await fetch(`${API_BASE}/project/${projectName}/packages`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(data),
  });
  return handleResponse<Package>(response);
}

// Tag API
export async function listTags(projectName: string, packageName: string): Promise<Tag[]> {
  const response = await fetch(`${API_BASE}/project/${projectName}/${packageName}/tags`);
  return handleResponse<Tag[]>(response);
}

export async function createTag(projectName: string, packageName: string, data: { name: string; artifact_id: string }): Promise<Tag> {
  const response = await fetch(`${API_BASE}/project/${projectName}/${packageName}/tags`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(data),
  });
  return handleResponse<Tag>(response);
}

// Artifact API
export async function getArtifact(artifactId: string): Promise<Artifact> {
  const response = await fetch(`${API_BASE}/artifact/${artifactId}`);
  return handleResponse<Artifact>(response);
}

// Upload
export async function uploadArtifact(projectName: string, packageName: string, file: File, tag?: string): Promise<UploadResponse> {
  const formData = new FormData();
  formData.append('file', file);
  if (tag) {
    formData.append('tag', tag);
  }

  const response = await fetch(`${API_BASE}/project/${projectName}/${packageName}/upload`, {
    method: 'POST',
    body: formData,
  });
  return handleResponse<UploadResponse>(response);
}

// Download URL
export function getDownloadUrl(projectName: string, packageName: string, ref: string): string {
  return `${API_BASE}/project/${projectName}/${packageName}/+/${ref}`;
}