import { api } from '../api.js';
import { escapeHtml, showAlert, hideAlert } from '../utils.js';

export async function initDepartmentsData() {
    const deptTbody = document.getElementById('departments-tbody');
    const specTbody = document.getElementById('specialties-tbody');

    const createDeptForm = document.getElementById('create-department-form');
    const createSpecForm = document.getElementById('create-specialty-form');

    let departments = [];
    let specialties = [];

    async function loadData() {
        // Load Departments
        try {
            departments = await api.get('/api/departments');
            renderDepartments();
        } catch (e) {
            deptTbody.innerHTML = '<tr><td colspan="3" class="loading-row">-</td></tr>';
        }

        // Load Specialties
        try {
            specialties = await api.get('/api/specialties');
            renderSpecialties();
        } catch (e) {
            specTbody.innerHTML = '<tr><td colspan="3" class="loading-row">-</td></tr>';
        }
    }

    function renderDepartments() {
        if (!departments || !departments.length) {
            deptTbody.innerHTML = '<tr><td colspan="3" class="loading-row">-</td></tr>';
            return;
        }
        deptTbody.innerHTML = departments.map(d => `
            <tr>
                <td>${d.id}</td>
                <td>${escapeHtml(d.departmentName || d.name)}</td>
                <td>${escapeHtml(String(d.departmentCode || d.code))}</td>
            </tr>
        `).join('');
    }

    function renderSpecialties() {
        if (!specialties || !specialties.length) {
            specTbody.innerHTML = '<tr><td colspan="3" class="loading-row">-</td></tr>';
            return;
        }
        specTbody.innerHTML = specialties.map(s => `
            <tr>
                <td>${s.id}</td>
                <td>${escapeHtml(s.specialityName || s.name)}</td>
                <td>${escapeHtml(s.specialityCode || s.specialtyCode || s.specialty_code)}</td>
            </tr>
        `).join('');
    }

    createDeptForm.addEventListener('submit', async (e) => {
        e.preventDefault();
        hideAlert('create-dept-alert');
        const name = document.getElementById('dept-name').value.trim();
        const code = document.getElementById('dept-code').value.trim();

        if (!name || !code) {
            showAlert('create-dept-alert', 'Заполните все поля', 'error');
            return;
        }

        try {
            await api.post('/api/departments', { departmentName: name, departmentCode: Number(code) });
            showAlert('create-dept-alert', `Кафедра "${name}" создана`, 'success');
            createDeptForm.reset();
            loadData();
        } catch (error) {
            showAlert('create-dept-alert', error.message || 'Ошибка создания кафедры', 'error');
        }
    });

    createSpecForm.addEventListener('submit', async (e) => {
        e.preventDefault();
        hideAlert('create-spec-alert');
        const name = document.getElementById('spec-name').value.trim();
        const code = document.getElementById('spec-code').value.trim();

        if (!name || !code) {
            showAlert('create-spec-alert', 'Заполните все поля', 'error');
            return;
        }

        try {
            await api.post('/api/specialties', { specialityName: name, specialityCode: code });
            showAlert('create-spec-alert', `Специальность "${name}" создана`, 'success');
            createSpecForm.reset();
            loadData();
        } catch (error) {
            showAlert('create-spec-alert', error.message || 'Ошибка создания специальности', 'error');
        }
    });

    loadData();
}