import {
  Project,
  Package,
  Tag,
  TagDetail,
  Artifact,
  ArtifactDetail,
  UploadResponse,
  PaginatedResponse,
  ListParams,
  TagListParams,
  PackageListParams,
  ArtifactListParams,
  ProjectListParams,
  GlobalSearchResponse,
} 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();
}

function buildQueryString(params: Record<string, unknown>): string {
  const searchParams = new URLSearchParams();
  Object.entries(params).forEach(([key, value]) => {
    if (value !== undefined && value !== null && value !== '') {
      searchParams.append(key, String(value));
    }
  });
  const query = searchParams.toString();
  return query ? `?${query}` : '';
}

// Global Search API
export async function globalSearch(query: string, limit: number = 5): Promise<GlobalSearchResponse> {
  const params = buildQueryString({ q: query, limit });
  const response = await fetch(`${API_BASE}/search${params}`);
  return handleResponse<GlobalSearchResponse>(response);
}

// Project API
export async function listProjects(params: ProjectListParams = {}): Promise<PaginatedResponse<Project>> {
  const query = buildQueryString(params as Record<string, unknown>);
  const response = await fetch(`${API_BASE}/projects${query}`);
  return handleResponse<PaginatedResponse<Project>>(response);
}

export async function listProjectsSimple(params: ListParams = {}): Promise<Project[]> {
  const data = await listProjects(params);
  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, params: PackageListParams = {}): Promise<PaginatedResponse<Package>> {
  const query = buildQueryString(params as Record<string, unknown>);
  const response = await fetch(`${API_BASE}/project/${projectName}/packages${query}`);
  return handleResponse<PaginatedResponse<Package>>(response);
}

export async function listPackagesSimple(projectName: string, params: PackageListParams = {}): Promise<Package[]> {
  const data = await listPackages(projectName, params);
  return data.items;
}

export async function getPackage(projectName: string, packageName: string): Promise<Package> {
  const response = await fetch(`${API_BASE}/project/${projectName}/packages/${packageName}`);
  return handleResponse<Package>(response);
}

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, params: TagListParams = {}): Promise<PaginatedResponse<TagDetail>> {
  const query = buildQueryString(params as Record<string, unknown>);
  const response = await fetch(`${API_BASE}/project/${projectName}/${packageName}/tags${query}`);
  return handleResponse<PaginatedResponse<TagDetail>>(response);
}

export async function listTagsSimple(projectName: string, packageName: string, params: TagListParams = {}): Promise<TagDetail[]> {
  const data = await listTags(projectName, packageName, params);
  return data.items;
}

export async function getTag(projectName: string, packageName: string, tagName: string): Promise<TagDetail> {
  const response = await fetch(`${API_BASE}/project/${projectName}/${packageName}/tags/${tagName}`);
  return handleResponse<TagDetail>(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<ArtifactDetail> {
  const response = await fetch(`${API_BASE}/artifact/${artifactId}`);
  return handleResponse<ArtifactDetail>(response);
}

export async function listPackageArtifacts(
  projectName: string,
  packageName: string,
  params: ArtifactListParams = {}
): Promise<PaginatedResponse<Artifact & { tags: string[] }>> {
  const query = buildQueryString(params as Record<string, unknown>);
  const response = await fetch(`${API_BASE}/project/${projectName}/${packageName}/artifacts${query}`);
  return handleResponse<PaginatedResponse<Artifact & { tags: string[] }>>(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}`;
}