import { apiClient } from '../shared/api-client.js';

export const DEPARTMENT_TABLE_COLUMNS = 4;
export const SPECIALTY_TABLE_COLUMNS = 4;
export const PROFILE_TABLE_COLUMNS = 5;
export const LIST_PAGE_SIZES = [25, 50, 100];

// --- Загрузка ---

export function fetchDepartments(client = apiClient) {
    return client.get('/api/departments', { errorMessage: 'Не удалось загрузить кафедры' });
}

export function fetchSpecialties(client = apiClient) {
    return client.get('/api/specialties', { errorMessage: 'Не удалось загрузить специальности' });
}

export function fetchAllProfiles(client = apiClient) {
    return client.get('/api/specialties/profiles', { errorMessage: 'Не удалось загрузить профили обучения' });
}

export function fetchProfiles(specId, client = apiClient) {
    return client.get(`/api/specialties/${specId}/profiles`, { errorMessage: 'Не удалось загрузить профили обучения' });
}

// --- Кафедры ---

export function createDepartment({ name, code }, client = apiClient) {
    return client.post(
        '/api/departments',
        { departmentName: name, departmentCode: Number(code) },
        { errorMessage: 'Ошибка создания кафедры' }
    );
}

export function updateDepartment(id, { name, code }, client = apiClient) {
    return client.put(
        `/api/departments/${id}`,
        { departmentName: name, departmentCode: Number(code) },
        { errorMessage: 'Ошибка обновления кафедры' }
    );
}

export function deleteDepartment(id, client = apiClient) {
    return client.delete(`/api/departments/${id}`, { errorMessage: 'Ошибка удаления кафедры' });
}

// --- Специальности ---

export function createSpecialty({ name, code }, client = apiClient) {
    return client.post(
        '/api/specialties',
        { specialityName: name, specialityCode: code },
        { errorMessage: 'Ошибка создания специальности' }
    );
}

export function updateSpecialty(id, { name, code }, client = apiClient) {
    return client.put(
        `/api/specialties/${id}`,
        { specialityName: name, specialityCode: code },
        { errorMessage: 'Ошибка обновления специальности' }
    );
}

export function deleteSpecialty(id, client = apiClient) {
    return client.delete(`/api/specialties/${id}`, { errorMessage: 'Ошибка удаления специальности' });
}

// --- Профили ---

export function createProfile(specId, { name, description }, client = apiClient) {
    return client.post(
        `/api/specialties/${specId}/profiles`,
        { name, description },
        { errorMessage: 'Ошибка сохранения профиля' }
    );
}

export function updateProfile(specId, profileId, { name, description }, client = apiClient) {
    return client.put(
        `/api/specialties/${specId}/profiles/${profileId}`,
        { id: Number(profileId), name, description },
        { errorMessage: 'Ошибка сохранения профиля' }
    );
}

export function deleteProfile(specId, profileId, client = apiClient) {
    return client.delete(`/api/specialties/${specId}/profiles/${profileId}`, { errorMessage: 'Ошибка удаления профиля' });
}

// --- Клиентская фильтрация и пагинация списков (как в legacy listPage) ---

export function filterListItems(items, query, fields) {
    const normalized = String(query || '').trim().toLocaleLowerCase('ru');
    if (!normalized) return [...(items || [])];
    return (items || []).filter(item =>
        fields(item).join(' ').toLocaleLowerCase('ru').includes(normalized));
}

export function clampPage(page, totalPages) {
    return Math.min(Math.max(Number(page) || 0, 0), Math.max(0, totalPages - 1));
}

export function pageSlice(items, page, size) {
    const pageSize = Number(size) || 25;
    return (items || []).slice(page * pageSize, (page + 1) * pageSize);
}

export function departmentFields(department) {
    return [department.id, department.departmentName || department.name, department.departmentCode ?? department.code];
}

export function specialtyFields(speciality) {
    return [
        speciality.id,
        speciality.specialityName || speciality.name,
        speciality.specialityCode || speciality.specialtyCode || speciality.specialty_code
    ];
}

export function profileFields(profile) {
    return [profile.id, profile.name, profile.description, profile.specialityCode, profile.specialityName];
}

// --- Метки ---

export function departmentName(department) {
    return department.departmentName || department.name;
}

export function departmentCode(department) {
    return department.departmentCode ?? department.code;
}

export function specialtyName(speciality) {
    return speciality.specialityName || speciality.name;
}

export function specialtyCode(speciality) {
    return speciality.specialityCode || speciality.specialtyCode || speciality.specialty_code;
}

export function specialtyOptionLabel(speciality) {
    return `${specialtyCode(speciality)} · ${specialtyName(speciality)}`;
}

export function profileSpecialtyLabel(profile) {
    return `${profile.specialityCode} · ${profile.specialityName}`;
}