/**
 * Client-side API helper for the Tracker Service.
 * Uses @bytelyst/api-client shared package.
 * All calls go through Next.js API routes to keep tokens server-side.
 */

import { createApiClient } from '@bytelyst/api-client';

export interface TrackerItem {
  id: string;
  productId: string;
  type: 'bug' | 'feature' | 'task';
  status: 'open' | 'in_progress' | 'done' | 'closed' | 'wont_fix';
  priority: 'critical' | 'high' | 'medium' | 'low';
  title: string;
  description: string;
  labels: string[];
  assignee: string | null;
  reportedBy: string;
  source: 'internal' | 'user_submitted' | 'auto_detected';
  visibility: 'internal' | 'public';
  voteCount: number;
  commentCount: number;
  targetRelease: string | null;
  createdAt: string;
  updatedAt: string;
}

export interface Comment {
  id: string;
  itemId: string;
  productId: string;
  authorId: string;
  authorEmail: string | null;
  body: string;
  createdAt: string;
  updatedAt: string;
}

export interface TrackerStats {
  productId: string;
  total: number;
  byType: Record<string, number>;
  byStatus: Record<string, number>;
  byPriority: Record<string, number>;
}

export interface ListItemsResponse {
  items: TrackerItem[];
  total: number;
  limit: number;
  offset: number;
}

const trackerApi = createApiClient({
  baseUrl: '/api/tracker',
  getToken: () => (typeof window !== 'undefined' ? localStorage.getItem('tracker_token') : null),
});

/** Wrap apiFetch to inject x-product-id header from localStorage. */
function apiFetch<T>(path: string, options?: RequestInit): Promise<T> {
  const extra: Record<string, string> = {};
  if (typeof window !== 'undefined') {
    const pid = localStorage.getItem('tracker_selected_product');
    if (pid) extra['x-product-id'] = pid;
  }
  return trackerApi.fetch<T>(path, {
    ...options,
    headers: { ...extra, ...(options?.headers as Record<string, string>) },
  });
}

export async function listItems(params?: Record<string, string>): Promise<ListItemsResponse> {
  const qs = params ? `?${new URLSearchParams(params).toString()}` : '';
  return apiFetch(`/items${qs}`);
}

export async function getItem(id: string): Promise<TrackerItem> {
  return apiFetch(`/items/${id}`);
}

export async function createItem(data: Partial<TrackerItem>): Promise<TrackerItem> {
  return apiFetch('/items', { method: 'POST', body: JSON.stringify(data) });
}

export async function updateItem(id: string, data: Partial<TrackerItem>): Promise<TrackerItem> {
  return apiFetch(`/items/${id}`, { method: 'PUT', body: JSON.stringify(data) });
}

export async function updateItemStatus(id: string, status: string): Promise<TrackerItem> {
  return apiFetch(`/items/${id}/status`, { method: 'PATCH', body: JSON.stringify({ status }) });
}

export async function deleteItem(id: string): Promise<void> {
  await apiFetch(`/items/${id}`, { method: 'DELETE' });
}

export async function getStats(productId?: string): Promise<TrackerStats> {
  const qs = productId ? `?productId=${productId}` : '';
  return apiFetch(`/items/stats${qs}`);
}

export async function listComments(
  itemId: string
): Promise<{ comments: Comment[]; count: number }> {
  return apiFetch(`/items/${itemId}/comments`);
}

export async function addComment(itemId: string, body: string): Promise<Comment> {
  return apiFetch(`/items/${itemId}/comments`, { method: 'POST', body: JSON.stringify({ body }) });
}

export async function toggleVote(itemId: string): Promise<{ voted: boolean; voteCount: number }> {
  return apiFetch(`/items/${itemId}/vote`, { method: 'POST' });
}

// ── Public Roadmap API (no auth required) ────────────────────────────

const publicApi = createApiClient({ baseUrl: '/api/tracker' });
const publicFetch = publicApi.fetch;

export interface PublicRoadmapStats {
  total: number;
  byStatus: Record<string, number>;
  byType: Record<string, number>;
  totalVotes: number;
}

export async function getRoadmapItems(params?: Record<string, string>): Promise<ListItemsResponse> {
  const qs = params ? `?${new URLSearchParams(params).toString()}` : '';
  return publicFetch(`/public/roadmap${qs}`);
}

export async function getRoadmapStats(productId?: string): Promise<PublicRoadmapStats> {
  const qs = productId ? `?productId=${productId}` : '';
  return publicFetch(`/public/roadmap/stats${qs}`);
}

export async function getPublicItem(id: string): Promise<TrackerItem> {
  return publicFetch(`/public/items/${id}`);
}

export async function submitPublicItem(data: {
  type?: string;
  title: string;
  description?: string;
  email: string;
  name: string;
}): Promise<{ id: string; title: string; status: string }> {
  return publicFetch('/public/submit', { method: 'POST', body: JSON.stringify(data) });
}

export async function publicVote(
  itemId: string,
  email: string
): Promise<{ voted: boolean; voteCount: number }> {
  return publicFetch(`/public/items/${itemId}/vote`, {
    method: 'POST',
    body: JSON.stringify({ email }),
  });
}