const API_BASE = import.meta.env.VITE_API_URL || '';

export interface Product {
    id: number;
    slug: string;
    site_url?: string | null;
    title: string;
    subtitle: string | null;
    description: string;
    status: 'production' | 'development' | 'planned';
    audience: 'B2B' | 'B2C' | 'global' | null;
    icon_key: string | null;
    tags: string[];
    sort_order: number;
    title_en?: string | null;
    subtitle_en?: string | null;
    description_en?: string | null;
    logo_url?: string | null;
    brand_color?: string | null;
}

export interface ApproachItem {
    id: number;
    title: string;
    description: string;
    icon_key: string | null;
    sort_order: number;
    title_en?: string | null;
    description_en?: string | null;
}

export interface BusinessCard {
    id: number;
    slug: string;
    name: string;
    role: string | null;
    company: string | null;
    phone: string | null;
    email: string | null;
    telegram: string | null;
    photo: string | null;
    product_title: string | null;
    product_subtitle: string | null;
    product_url: string | null;
    site_url: string | null;
    is_published?: boolean;
}

export interface LandingContent {
    sections: Record<string, Record<string, unknown>>;
    sections_en?: Record<string, Record<string, unknown>>;
    products: Product[];
    approach: ApproachItem[];
    settings: Record<string, string>;
}

async function request<T>(
    path: string,
    options: RequestInit = {}
): Promise<T> {
    const res = await fetch(`${API_BASE}${path}`, {
        credentials: 'include',
        headers: {
            'Content-Type': 'application/json',
            ...(options.headers || {}),
        },
        ...options,
    });
    if (!res.ok) {
        const err = await res.json().catch(() => ({}));
        throw new Error(err.error || `request_failed_${res.status}`);
    }
    return res.json();
}

export const api = {
    getContent: () => request<LandingContent>('/api/content'),

    login: (login: string, password: string) =>
        request<{ ok: true; login: string }>('/api/admin/login', {
            method: 'POST',
            body: JSON.stringify({ login, password }),
        }),
    logout: () =>
        request<{ ok: true }>('/api/admin/logout', { method: 'POST' }),
    me: () => request<{ admin: { id: number; login: string } }>('/api/admin/me'),

    listProducts: () =>
        request<{ products: Product[] }>('/api/admin/products'),
    updateProduct: (id: number, data: Partial<Product>) =>
        request<{ product: Product }>(`/api/admin/products/${id}`, {
            method: 'PUT',
            body: JSON.stringify(data),
        }),
    createProduct: (data: Omit<Product, 'id'>) =>
        request<{ product: Product }>('/api/admin/products', {
            method: 'POST',
            body: JSON.stringify(data),
        }),
    deleteProduct: (id: number) =>
        request<{ ok: true }>(`/api/admin/products/${id}`, {
            method: 'DELETE',
        }),

    listSections: () => request<{ sections: unknown[] }>('/api/admin/sections'),
    updateSection: (key: string, data: { content_json?: unknown; title?: string }) =>
        request<{ section: unknown }>(`/api/admin/sections/${key}`, {
            method: 'PUT',
            body: JSON.stringify(data),
        }),

    listApproach: () => request<{ items: ApproachItem[] }>('/api/admin/approach'),
    updateApproach: (id: number, data: Partial<ApproachItem>) =>
        request<{ item: ApproachItem }>(`/api/admin/approach/${id}`, {
            method: 'PUT',
            body: JSON.stringify(data),
        }),

    listSettings: () =>
        request<{ settings: Record<string, string> }>('/api/admin/settings'),
    updateSetting: (key: string, value: string) =>
        request<{ ok: true }>(`/api/admin/settings/${key}`, {
            method: 'PUT',
            body: JSON.stringify({ value }),
        }),

    getCard: (slug: string) =>
        request<{ card: BusinessCard }>(`/api/cards/${slug}`),
    listCards: () =>
        request<{ cards: BusinessCard[] }>('/api/admin/cards'),
    createCard: (data: Partial<BusinessCard>) =>
        request<{ card: BusinessCard }>('/api/admin/cards', {
            method: 'POST',
            body: JSON.stringify(data),
        }),
    updateCard: (id: number, data: Partial<BusinessCard>) =>
        request<{ card: BusinessCard }>(`/api/admin/cards/${id}`, {
            method: 'PUT',
            body: JSON.stringify(data),
        }),
    deleteCard: (id: number) =>
        request<{ ok: true }>(`/api/admin/cards/${id}`, { method: 'DELETE' }),
};