/**
 * 多班级版班级管理系统 - 课代表作业管理JS
 * 
 * 开发者: Canglan
 * 版权归属: Sea Network Technology Studio
 * 
 * 版权所有 © Sea Network Technology Studio
 */

(function() {
'use strict';

var currentPage = 1;
var pageSize = 20;
var currentAssignmentId = null;

async function loadHomework(page) {
    var res = await apiGet('/api/cadre/homework', { page: page, page_size: pageSize });
    if (res && res.success && res.data) {
        var items = res.data.items || res.data.records || [];
        var total = res.data.total || 0;
        var html = '';
        if (items.length === 0) {
            html = '<tr><td colspan="5" style="text-align:center;">暂无作业记录</td></tr>';
        } else {
            items.forEach(function(item) {
                html += '<tr>' +
                    '<td>' + escapeHtml(item.title || '-') + '</td>' +
                    '<td>' + escapeHtml(item.subject_name || '-') + '</td>' +
                    '<td>' + formatDate(item.deadline) + '</td>' +
                    '<td>' + escapeHtml(item.description || '-') + '</td>' +
                    '<td><button class="btn btn-sm btn-outline" onclick="showAbsentModal(' + item.assignment_id + ')">登记缺交</button></td>' +
                '</tr>';
            });
        }
        document.getElementById('homeworkList').innerHTML = html;

        var totalPages = Math.ceil(total / pageSize);
        if (totalPages > 1) {
            document.getElementById('pagination').style.display = 'flex';
            document.getElementById('pageInfo').textContent = page + ' / ' + totalPages;
            document.getElementById('prevBtn').disabled = page <= 1;
            document.getElementById('nextBtn').disabled = page >= totalPages;
        } else {
            document.getElementById('pagination').style.display = 'none';
        }
    }
}

window.changePage = function(delta) {
    currentPage += delta;
    loadHomework(currentPage);
};

window.showPublishModal = function() {
    document.getElementById('publishForm').reset();
    document.getElementById('hwDeadline').value = new Date().toISOString().split('T')[0];
    document.getElementById('publishModal').style.display = 'flex';
};

window.submitHomework = async function() {
    var title = document.getElementById('hwTitle').value.trim();
    var deadline = document.getElementById('hwDeadline').value;
    var description = document.getElementById('hwDescription').value.trim();

    if (!title) {
        showToast('请填写作业标题', 'error');
        return;
    }
    if (!deadline) {
        showToast('请选择截止日期', 'error');
        return;
    }

    var res = await apiPost('/api/cadre/homework', {
        title: title,
        deadline: deadline,
        description: description
    });

    if (res && res.success) {
        showToast('作业发布成功');
        closeModal('publishModal');
        loadHomework(currentPage);
    } else {
        showToast(res && res.message ? res.message : '发布失败', 'error');
    }
};

window.showAbsentModal = async function(assignmentId) {
    currentAssignmentId = assignmentId;
    var res = await apiGet('/api/admin/students', { page_size: 1000 });
    if (res && res.success && res.data) {
        var students = res.data.students || res.data.items || [];
        var html = '<div class="form-group"><label>选择缺交学生</label></div>';
        if (students.length === 0) {
            html += '<p style="text-align:center;padding:20px;">暂无学生数据</p>';
        } else {
            html += '<div class="table-wrapper"><table class="table"><thead><tr>' +
                '<th><input type="checkbox" id="selectAllAbsent" onchange="toggleAllAbsent(this)"></th>' +
                '<th>学号</th><th>姓名</th></tr></thead><tbody>';
            students.forEach(function(s) {
                html += '<tr>' +
                    '<td><input type="checkbox" class="absent-checkbox" data-id="' + s.student_id + '"></td>' +
                    '<td>' + escapeHtml(s.student_no) + '</td>' +
                    '<td>' + escapeHtml(s.name) + '</td>' +
                '</tr>';
            });
            html += '</tbody></table></div>';
        }
        document.getElementById('absentStudentList').innerHTML = html;
        document.getElementById('absentModal').style.display = 'flex';
    } else {
        showToast('获取学生列表失败', 'error');
    }
};

window.toggleAllAbsent = function(el) {
    var checkboxes = document.querySelectorAll('.absent-checkbox');
    checkboxes.forEach(function(cb) { cb.checked = el.checked; });
};

window.submitAbsent = async function() {
    var checkboxes = document.querySelectorAll('.absent-checkbox:checked');
    if (checkboxes.length === 0) {
        showToast('请选择至少一名缺交学生', 'error');
        return;
    }

    var studentIds = [];
    checkboxes.forEach(function(cb) {
        studentIds.push(parseInt(cb.getAttribute('data-id')));
    });

    var hwDeduct = window.DEDUCTION_HOMEWORK_NOT_SUBMIT || 2;
    var res = await apiPost('/api/cadre/conduct/add', {
        student_ids: studentIds,
        points_change: -hwDeduct,
        reason: '作业未提交',
        related_type: 'homework'
    });

    if (res && res.success) {
        showToast('已登记 ' + studentIds.length + ' 名学生缺交');
        closeModal('absentModal');
    } else {
        showToast(res && res.message ? res.message : '提交失败', 'error');
    }
};

window.closeModal = function(id) {
    document.getElementById(id).style.display = 'none';
};

document.addEventListener('DOMContentLoaded', function() {
    loadHomework(currentPage);
});

})();