/**
 * 班级操行分管理系统 - 学期管理页JS
 * 
 * 开发者: Canglan
 * 版权归属: Sea Network Technology Studio
 * 
 * 版权所有 © Sea Network Technology Studio
 */

(function() {
'use strict';

let archiveSemesterId = null;
let archivePage = 1;
let archiveTotalPages = 1;
let associateSemesterId = null;

function fillSemesterDates(type) {
    const now = new Date();
    const currentYear = now.getFullYear();
    const currentMonth = now.getMonth() + 1;
    const startDateInput = document.getElementById('semesterStartDate');
    const endDateInput = document.getElementById('semesterEndDate');

    if (type === 'upper') {
        const year = currentMonth >= 6 ? currentYear : currentYear - 1;
        const endYear = year + 1;
        let febDay = 28;
        if ((endYear % 4 === 0 && endYear % 100 !== 0) || endYear % 400 === 0) {
            febDay = 29;
        }
        startDateInput.value = year + '-09-01';
        endDateInput.value = endYear + '-02-' + febDay;
    } else if (type === 'lower') {
        startDateInput.value = currentYear + '-03-01';
        endDateInput.value = currentYear + '-07-15';
    }
}

async function loadSemesters() {
    const res = await apiGet('/api/semester/list');
    if (res && res.success) {
        let html = '';
        const semesters = res.data || [];
        semesters.forEach(sem => {
            let statusText = '';
            let statusClass = '';
            if (sem.is_archived) {
                statusText = '已归档';
                statusClass = 'status-badge status-not_submitted';
            } else if (sem.is_active) {
                statusText = '当前学期';
                statusClass = 'status-badge status-submitted';
            } else {
                statusText = '未激活';
                statusClass = 'status-badge status-late';
            }

            let actions = '';
            const startDate = sem.start_date || '';
            const endDate = sem.end_date || '';
            if (!sem.is_archived) {
                actions += `<button class="btn btn-sm" style="border:1px solid #667eea;color:#667eea;" onclick="showEditSemesterModal(${sem.semester_id}, '${escapeHtml(sem.semester_name)}', '${startDate}', '${endDate}')">编辑</button> `;
                if (!sem.is_active) {
                    actions += `<button class="btn btn-sm btn-primary" onclick="activateSemester(${sem.semester_id})">激活</button> `;
                }
                actions += `<button class="btn btn-sm" style="border:1px solid #2ecc71;color:#2ecc71;" onclick="showAssociateConfirm(${sem.semester_id}, '${escapeHtml(sem.semester_name)}', '${startDate}', '${endDate}')">关联数据</button> `;
                actions += `<button class="btn btn-sm btn-warning" onclick="showArchiveConfirm(${sem.semester_id}, '${escapeHtml(sem.semester_name)}')">归档</button> `;
            }
            if (sem.is_archived) {
                actions += `<button class="btn btn-sm btn-secondary" onclick="viewArchiveData(${sem.semester_id}, '${escapeHtml(sem.semester_name)}')">查看归档</button>`;
            }

            html += `<tr>
                <td>${escapeHtml(sem.semester_name)}</td>
                <td>${formatDate(sem.start_date)}</td>
                <td>${formatDate(sem.end_date)}</td>
                <td><span class="${statusClass}">${statusText}</span></td>
                <td>${formatDateTime(sem.created_at)}</td>
                <td>${actions}</td>
            </tr>`;
        });
        if (semesters.length === 0) {
            html = '<tr><td colspan="6" style="text-align:center;">暂无学期，请点击上方按钮创建新学期</td></tr>';
        }
        document.getElementById('semesterList').innerHTML = html;
    }
}

function showCreateSemesterModal() {
    document.getElementById('semesterName').value = '';
    document.getElementById('semesterStartDate').value = '';
    document.getElementById('semesterEndDate').value = '';
    document.getElementById('createSemesterModal').style.display = 'flex';
}

async function submitCreateSemester() {
    const name = document.getElementById('semesterName').value.trim();
    const startDate = document.getElementById('semesterStartDate').value;
    const endDate = document.getElementById('semesterEndDate').value;

    if (!name) {
        showToast('请输入学期名称', 'warning');
        return;
    }

    const res = await apiPost('/api/semester/create', {
        semester_name: name,
        start_date: startDate || null,
        end_date: endDate || null
    });

    if (res && res.success) {
        showToast(res.message || '学期创建成功');
        closeModal('createSemesterModal');
        loadSemesters();
    } else {
        showToast(res?.message || '创建失败', 'error');
    }
}

async function activateSemester(semesterId) {
    if (!confirm('确认将此学期设为当前活跃学期？其他学期将被设为非活跃。')) {
        return;
    }

    const res = await apiPut(`/api/semester/activate/${semesterId}`);
    if (res && res.success) {
        showToast(res.message || '已设为当前学期');
        loadSemesters();
    } else {
        showToast(res?.message || '操作失败', 'error');
    }
}

function showEditSemesterModal(id, name, startDate, endDate) {
    document.getElementById('editSemesterId').value = id;
    document.getElementById('editSemesterName').value = name;
    document.getElementById('editSemesterStartDate').value = startDate || '';
    document.getElementById('editSemesterEndDate').value = endDate || '';
    document.getElementById('editSemesterModal').style.display = 'flex';
}

async function submitEditSemester() {
    const id = document.getElementById('editSemesterId').value;
    const name = document.getElementById('editSemesterName').value.trim();
    const startDate = document.getElementById('editSemesterStartDate').value;
    const endDate = document.getElementById('editSemesterEndDate').value;

    if (!name) {
        showToast('请输入学期名称', 'warning');
        return;
    }

    const data = { semester_name: name };
    if (startDate) data.start_date = startDate;
    if (endDate) data.end_date = endDate;

    const res = await apiPut(`/api/semester/update/${id}`, data);
    if (res && res.success) {
        showToast(res.message || '更新成功');
        closeModal('editSemesterModal');
        loadSemesters();
    } else {
        showToast(res?.message || '更新失败', 'error');
    }
}

async function deleteSemester() {
    const id = document.getElementById('editSemesterId').value;
    if (!confirm('确定要删除该学期吗？如果学期已有归档数据则无法删除。')) {
        return;
    }

    const res = await apiDelete(`/api/semester/delete/${id}`);
    if (res && res.success) {
        showToast(res.message || '删除成功');
        closeModal('editSemesterModal');
        loadSemesters();
    } else {
        showToast(res?.message || '删除失败', 'error');
    }
}

function showAssociateConfirm(id, name, startDate, endDate) {
    associateSemesterId = id;
    const dateRange = startDate ? `${startDate} ~ ${endDate || '至今'}` : '未设置日期范围';
    document.getElementById('associateConfirmText').innerHTML =
        `即将关联 <strong>${dateRange}</strong> 内的所有未分配学期的操行分记录和考勤记录到学期 "<strong>${name}</strong>"。`;
    document.getElementById('associateConfirmModal').style.display = 'flex';
}

async function confirmAssociate() {
    if (!associateSemesterId) return;

    const res = await apiPost(`/api/semester/${associateSemesterId}/associate`);
    if (res && res.success) {
        showToast(res.message || '关联成功');
        closeModal('associateConfirmModal');
        associateSemesterId = null;
    } else {
        showToast(res?.message || '关联失败', 'error');
    }
}

function showArchiveConfirm(semesterId, semesterName) {
    archiveSemesterId = semesterId;
    document.getElementById('archiveResetScores').checked = false;
    document.getElementById('archiveConfirmText').innerHTML =
        `确定要归档学期 "<strong>${semesterName}</strong>" 吗？<br>归档后将保存所有学生的当前操行分快照，该学期数据将变为只读。`;
    document.getElementById('archiveConfirmModal').style.display = 'flex';
}

async function confirmArchive() {
    if (!archiveSemesterId) return;

    const resetScores = document.getElementById('archiveResetScores').checked;
    const url = `/api/semester/archive/${archiveSemesterId}?reset_scores=${resetScores}`;

    const res = await apiPost(url);
    if (res && res.success) {
        showToast(res.message || '归档成功');
        closeModal('archiveConfirmModal');
        archiveSemesterId = null;
        loadSemesters();
    } else {
        showToast(res?.message || '归档失败', 'error');
    }
}

async function viewArchiveData(semesterId, semesterName, page) {
    page = page || 1;
    archivePage = page;
    document.getElementById('archiveDataTitle').textContent = `归档数据 - ${semesterName}`;

    const res = await apiGet(`/api/semester/archive/${semesterId}/records`, {
        page: page, page_size: 50
    });

    if (res && res.success) {
        const data = res.data || {};
        const archives = data.archives || [];
        let html = '';
        archives.forEach(a => {
            html += `<tr>
                <td>${a.rank_position || '-'}</td>
                <td>${escapeHtml(a.student_no)}</td>
                <td>${escapeHtml(a.student_name)}</td>
                <td>${a.final_points}</td>
                <td>${a.attendance_present || 0}</td>
                <td>${a.attendance_absent || 0}</td>
                <td>${a.attendance_late || 0}</td>
                <td>${a.attendance_leave || 0}</td>
                <td>${a.homework_submitted || 0}</td>
                <td>${a.homework_not_submitted || 0}</td>
                <td>${a.homework_late || 0}</td>
            </tr>`;
        });
        if (archives.length === 0) {
            html = '<tr><td colspan="11" style="text-align:center;">暂无归档数据</td></tr>';
        }
        document.getElementById('archiveDataList').innerHTML = html;

        archiveTotalPages = data.total_pages || 1;
        renderArchivePagination(semesterId, semesterName);
        document.getElementById('archiveDataModal').style.display = 'flex';
    } else {
        showToast(res?.message || '获取归档数据失败', 'error');
    }
}

function renderArchivePagination(semesterId, semesterName) {
    renderSmartPagination('archivePagination', archivePage, archiveTotalPages, function(page) {
        viewArchiveData(semesterId, semesterName, page);
    });
}

loadSemesters();

window.fillSemesterDates = fillSemesterDates;
window.showCreateSemesterModal = showCreateSemesterModal;
window.submitCreateSemester = submitCreateSemester;
window.activateSemester = activateSemester;
window.showEditSemesterModal = showEditSemesterModal;
window.submitEditSemester = submitEditSemester;
window.deleteSemester = deleteSemester;
window.showAssociateConfirm = showAssociateConfirm;
window.confirmAssociate = confirmAssociate;
window.showArchiveConfirm = showArchiveConfirm;
window.confirmArchive = confirmArchive;
window.viewArchiveData = viewArchiveData;

})();