// Course Response structure
export interface CourseResponse {
    id: number;
    category_id: number;
    title: {
        en: string;
        th: string;
    };
    slug: string;
    description: {
        en: string;
        th: string;
    };
    thumbnail_url: string | null;
    price: string;
    is_free: boolean;
    have_certificate: boolean;
    status: 'DRAFT' | 'PENDING' | 'APPROVED' | 'REJECTED';
    approved_by: number | null;
    approved_at: string | null;
    rejection_reason: string | null;
    created_at: string;
    created_by: number;
    updated_at: string;
    updated_by: number | null;
}

export interface CoursesListResponse {
    code: number;
    message: string;
    data: CourseResponse[];
    total: number;
}

// Helper function to get auth token from cookie
const getAuthToken = (): string => {
    const tokenCookie = useCookie('token');
    return tokenCookie.value || '';
};

// Mock courses data
const MOCK_COURSES: CourseResponse[] = [
    {
        id: 1,
        category_id: 1,
        title: { en: 'JavaScript Fundamentals', th: 'พื้นฐาน JavaScript' },
        slug: 'javascript-fundamentals',
        description: {
            en: 'Learn JavaScript fundamentals from scratch',
            th: 'เรียนรู้พื้นฐาน JavaScript ตั้งแต่เริ่มต้น'
        },
        thumbnail_url: null,
        price: '0',
        is_free: true,
        have_certificate: true,
        status: 'APPROVED',
        approved_by: 1,
        approved_at: '2024-01-15T00:00:00Z',
        rejection_reason: null,
        created_at: '2024-01-15T00:00:00Z',
        created_by: 2,
        updated_at: '2024-01-15T00:00:00Z',
        updated_by: null
    },
    {
        id: 2,
        category_id: 2,
        title: { en: 'React for Beginners', th: 'React สำหรับผู้เริ่มต้น' },
        slug: 'react-for-beginners',
        description: {
            en: 'Build modern web apps with React',
            th: 'สร้างเว็บแอปพลิเคชันด้วย React'
        },
        thumbnail_url: null,
        price: '990',
        is_free: false,
        have_certificate: true,
        status: 'PENDING',
        approved_by: null,
        approved_at: null,
        rejection_reason: null,
        created_at: '2024-02-01T00:00:00Z',
        created_by: 2,
        updated_at: '2024-02-01T00:00:00Z',
        updated_by: null
    },
    {
        id: 3,
        category_id: 1,
        title: { en: 'TypeScript Masterclass', th: 'TypeScript ขั้นสูง' },
        slug: 'typescript-masterclass',
        description: {
            en: 'Master TypeScript for better JavaScript development',
            th: 'เรียนรู้ TypeScript เพื่อพัฒนา JavaScript ได้ดียิ่งขึ้น'
        },
        thumbnail_url: null,
        price: '1290',
        is_free: false,
        have_certificate: true,
        status: 'DRAFT',
        approved_by: null,
        approved_at: null,
        rejection_reason: null,
        created_at: '2024-02-15T00:00:00Z',
        created_by: 2,
        updated_at: '2024-02-15T00:00:00Z',
        updated_by: null
    }
];

export const instructorService = {
    async getCourses(): Promise<CourseResponse[]> {
        const config = useRuntimeConfig();
        const useMockData = config.public.useMockData as boolean;

        if (useMockData) {
            await new Promise(resolve => setTimeout(resolve, 500));
            return MOCK_COURSES;
        }

        const token = getAuthToken();
        const response = await $fetch<CoursesListResponse>('/api/instructors/courses', {
            baseURL: config.public.apiBaseUrl as string,
            headers: {
                Authorization: `Bearer ${token}`
            }
        });

        return response.data;
    }
};