import { getSession } from "next-auth/react";
import { Category, CategoryListResponse } from "../types/category";

const API_URL = process.env.NEXT_PUBLIC_API_URL + "/api/v1";

async function fetchWithAuth(url: string, options: RequestInit = {}) {
    const session = await getSession();
    if (!session?.accessToken) {
        throw new Error("No access token found");
    }

    const headers = {
        ...options.headers,
        "Authorization": `Bearer ${session.accessToken}`,
        "Content-Type": "application/json",
    };

    const response = await fetch(url, { ...options, headers });

    if (!response.ok) {
        const errorData = await response.json().catch(() => ({}));
        throw new Error(errorData.error || errorData.message || "API request failed");
    }

    // For 204 No Content
    if (response.status === 204) {
        return null;
    }

    return response.json();
}

export const categoryService = {
    async getCategories(page = 1, perPage = 20, search = "", soft = ""): Promise<CategoryListResponse> {
        const query = new URLSearchParams({
            page: page.toString(),
            per_page: perPage.toString(),
            q: search,
            soft: soft,
        });
        const data = await fetchWithAuth(`${API_URL}/admin/categories?${query}`);
        return data;
    },

    async createCategory(data: Partial<Category>): Promise<Category> {
        const res = await fetchWithAuth(`${API_URL}/admin/categories`, {
            method: "POST",
            body: JSON.stringify(data),
        });
        return res.data;
    },

    async updateCategory(id: number, data: Partial<Category>): Promise<Category> {
        const res = await fetchWithAuth(`${API_URL}/admin/categories/${id}`, {
            method: "PUT",
            body: JSON.stringify(data),
        });
        return res.data;
    },

    async deleteCategory(id: number): Promise<void> {
        await fetchWithAuth(`${API_URL}/admin/categories/${id}`, {
            method: "DELETE",
        });
    },

    async restoreCategory(id: number): Promise<Category> {
        const res = await fetchWithAuth(`${API_URL}/admin/categories/${id}/restore`, {
            method: "POST",
            body: JSON.stringify({}),
        });
        return res.data;
    }
};