import type { Recipe, RecipeInput, RecipeSummary } from "../types/recipe";

const BASE = "/api";

async function request<T>(path: string, options?: RequestInit): Promise<T> {
  const isFormData = options?.body instanceof FormData;
  const res = await fetch(`${BASE}${path}`, {
    ...options,
    headers: {
      ...(isFormData ? {} : { "Content-Type": "application/json" }),
      ...options?.headers,
    },
  });
  if (!res.ok) {
    let detail = "";
    try {
      const data = await res.json();
      detail = data.detail ?? JSON.stringify(data);
    } catch {
      detail = await res.text();
    }
    throw new Error(detail || `Request failed: ${res.status}`);
  }
  if (res.status === 204) return undefined as T;
  return res.json() as Promise<T>;
}

export function listRecipes(search?: string): Promise<RecipeSummary[]> {
  const query = search ? `?search=${encodeURIComponent(search)}` : "";
  return request(`/recipes${query}`);
}

export function getRecipe(id: number): Promise<Recipe> {
  return request(`/recipes/${id}`);
}

export function createRecipe(payload: RecipeInput): Promise<Recipe> {
  return request(`/recipes`, { method: "POST", body: JSON.stringify(payload) });
}

export function updateRecipe(id: number, payload: RecipeInput): Promise<Recipe> {
  return request(`/recipes/${id}`, { method: "PUT", body: JSON.stringify(payload) });
}

export function deleteRecipe(id: number): Promise<void> {
  return request(`/recipes/${id}`, { method: "DELETE" });
}

export function uploadRecipeImage(id: number, file: File): Promise<Recipe> {
  const form = new FormData();
  form.append("file", file);
  return request(`/recipes/${id}/image`, { method: "POST", body: form });
}

export function deleteRecipeImage(id: number): Promise<Recipe> {
  return request(`/recipes/${id}/image`, { method: "DELETE" });
}

export function pdfDownloadUrl(id: number): string {
  return `${BASE}/recipes/${id}/pdf`;
}

export function uploadedImageUrl(filename: string): string {
  return `/uploads/${filename}`;
}