{% extends "base.html" %}

{% block title %}问题配置 - 钢琴练习方案系统{% endblock %}

{% block page_css %}
<style>
.problem-card { transition: all 0.2s; }
.problem-card:hover { transform: translateY(-2px); box-shadow: 0 4px 15px rgba(0,0,0,0.1); }
.category-badge { font-size: 11px; padding: 3px 8px; }
.category-技术类 { background: #e3f2fd; color: #1565c0; }
.category-认知类 { background: #f3e5f5; color: #7b1fa2; }
.category-节奏类 { background: #fff3e0; color: #e65100; }
.category-表现类 { background: #fce4ec; color: #c2185b; }
.category-习惯类 { background: #e8f5e9; color: #2e7d32; }
.category-综合类 { background: #f5f5f5; color: #616161; }
.editor-textarea { font-family: monospace; font-size: 13px; }
</style>
{% endblock %}

{% block sidebar_nav %}
<a class="nav-link" href="/">
    <i class="bi bi-people"></i> 学员管理
</a>
<a class="nav-link active" href="/settings">
    <i class="bi bi-gear"></i> 问题配置
</a>
<a class="nav-link" href="/api-settings" id="apiSettingsNav" style="display:none;">
    <i class="bi bi-key"></i> API设置
</a>
<a class="nav-link" href="/templates" id="templatesNav" style="display:none;">
    <i class="bi bi-file-earmark-text"></i> 模板管理
</a>
<a class="nav-link" href="/classes">
    <i class="bi bi-collection"></i> 班级管理
</a>
<a class="nav-link" href="/users" id="usersNav" style="display:none;">
    <i class="bi bi-person-badge"></i> 用户管理
</a>
<hr>
<a class="nav-link" href="#" onclick="showChangePasswordModal()">
    <i class="bi bi-key"></i> 修改密码
</a>
<a class="nav-link" href="#" onclick="logout()">
    <i class="bi bi-box-arrow-right"></i> 退出登录
</a>
{% endblock %}

{% block content %}
<!-- Tab导航 -->
<ul class="nav nav-tabs mb-4" id="settingsTabs" role="tablist">
    <li class="nav-item" role="presentation">
        <button class="nav-link active" id="problems-tab" data-bs-toggle="tab" data-bs-target="#problemsPane" type="button">
            <i class="bi bi-list-check"></i> 问题配置
        </button>
    </li>
</ul>

<div class="tab-content" id="settingsTabsContent">
    <!-- 问题配置面板 -->
    <div class="tab-pane fade show active" id="problemsPane" role="tabpanel">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h4><i class="bi bi-list-check"></i> 问题配置</h4>
            <div>
                <button type="button" class="btn btn-outline-secondary btn-sm me-2" onclick="loadProblems()">
                    <i class="bi bi-arrow-clockwise"></i> 刷新
                </button>
                <button type="button" class="btn btn-primary btn-sm" onclick="showAddModal()">
                    <i class="bi bi-plus-lg"></i> 新增问题
                </button>
            </div>
        </div>

        <div class="mb-3">
            <input type="text" class="form-control" placeholder="搜索问题..." id="searchInput" onkeyup="filterProblems()">
        </div>

        <div class="row" id="problemList"></div>
    </div>
</div>

<!-- 新增问题模态框 -->
<div class="modal fade" id="addModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">新增问题</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <div class="mb-3">
                    <label class="form-label">问题编号</label>
                    <input type="text" class="form-control" id="newProblemId" placeholder="如: 16">
                    <small class="text-muted">数字编号，将自动补齐为2位</small>
                </div>
                <div class="mb-3">
                    <label class="form-label">问题名称 *</label>
                    <input type="text" class="form-control" id="newProblemName" placeholder="如: 手小">
                </div>
                <div class="mb-3">
                    <label class="form-label">分类</label>
                    <select class="form-select" id="newProblemCategory">
                        <option value="技术类">技术类</option>
                        <option value="认知类">认知类</option>
                        <option value="节奏类">节奏类</option>
                        <option value="表现类">表现类</option>
                        <option value="习惯类">习惯类</option>
                        <option value="综合类">综合类</option>
                    </select>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">取消</button>
                <button type="button" class="btn btn-primary" onclick="createProblem()">创建</button>
            </div>
        </div>
    </div>
</div>

<!-- 编辑问题模态框 -->
<div class="modal fade" id="editModal" tabindex="-1">
    <div class="modal-dialog modal-lg">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">编辑问题</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <div class="mb-3">
                    <label class="form-label">问题名称 *</label>
                    <input type="text" class="form-control" id="editProblemName">
                </div>
                <div class="mb-3">
                    <label class="form-label">问题内容 (Markdown)</label>
                    <textarea class="form-control editor-textarea" id="editProblemContent" rows="20"></textarea>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">取消</button>
                <button type="button" class="btn btn-primary" onclick="saveProblem()">保存</button>
            </div>
        </div>
    </div>
</div>

<!-- 删除确认模态框 -->
<div class="modal fade" id="deleteModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">确认删除</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <p>确定要删除问题 <strong id="deleteProblemName"></strong> 吗？</p>
                <p class="text-muted small">删除后可在 bk 文件夹中找到备份</p>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">取消</button>
                <button type="button" class="btn btn-danger" onclick="confirmDelete()">删除</button>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block extra_js %}
<script src="https://cdn.jsdelivr.net/npm/easymde/dist/easymde.min.js"></script>
<script>
let allProblems = [];
let currentEditId = null;
let currentDeleteId = null;

document.addEventListener('DOMContentLoaded', function() {
    fetch('/api/check-login').then(r => r.json()).then(data => {
        if (!data.logged_in) {
            window.location.href = '/login';
            return;
        }
        const ROLE_LABELS = { 'admin': '管理员', 'user': '普通用户' };

        const userDisplay = data.username + ' (' + (ROLE_LABELS[data.role] || data.role) + ')';
        document.getElementById('currentUserDisplay').textContent = userDisplay;
        const mobileDisplay = document.getElementById('mobileUserDisplay');
        if (mobileDisplay) mobileDisplay.textContent = userDisplay;

        if (data.role === 'admin') {
            document.getElementById('usersNav').style.display = '';
            document.getElementById('templatesNav').style.display = '';
            document.getElementById('apiSettingsNav').style.display = '';
        } else {
            document.getElementById('templatesNav').style.display = 'none';
            document.getElementById('apiSettingsNav').style.display = 'none';
        }
    }).catch(() => {
        window.location.href = '/login';
    });

    loadProblems();
});

// ========== 问题配置相关 ==========

async function loadProblems() {
    const response = await fetch('/api/problems');
    allProblems = await response.json();
    renderProblems(allProblems);
}

function renderProblems(problems) {
    const container = document.getElementById('problemList');
    if (problems.length === 0) {
        container.innerHTML = '<div class="col-12 text-center text-muted py-5"><p>未找到问题配置</p></div>';
        return;
    }

    let html = '';
    problems.forEach(p => {
        html += `
            <div class="col-md-4 col-sm-6 mb-3 problem-item" data-name="${p.name.toLowerCase()}">
                <div class="card problem-card h-100">
                    <div class="card-body">
                        <div class="d-flex justify-content-between align-items-start mb-2">
                            <h6 class="card-title mb-0">${p.name}</h6>
                            <span class="badge category-badge category-${p.category}">${p.category}</span>
                        </div>
                        <p class="text-muted small mb-2">编号: ${p.id}</p>
                        <div class="btn-group btn-group-sm">
                            <button type="button" class="btn btn-outline-primary" onclick="editProblem('${p.id}')">
                                <i class="bi bi-pencil"></i> 编辑
                            </button>
                            <button type="button" class="btn btn-outline-danger" onclick="showDeleteConfirm('${p.id}', '${p.name}')">
                                <i class="bi bi-trash"></i> 删除
                            </button>
                        </div>
                    </div>
                </div>
            </div>
        `;
    });
    container.innerHTML = html;
}

function filterProblems() {
    const search = document.getElementById('searchInput').value.toLowerCase();
    document.querySelectorAll('.problem-item').forEach(item => {
        item.style.display = item.dataset.name.includes(search) ? 'block' : 'none';
    });
}

// 新增
function showAddModal() {
    document.getElementById('newProblemId').value = '';
    document.getElementById('newProblemName').value = '';
    document.getElementById('newProblemCategory').value = '技术类';
    new bootstrap.Modal(document.getElementById('addModal')).show();
}

async function createProblem() {
    const id = document.getElementById('newProblemId').value.trim();
    const name = document.getElementById('newProblemName').value.trim();
    const category = document.getElementById('newProblemCategory').value;

    if (!id || !name) {
        alert('请填写编号和名称');
        return;
    }

    const response = await fetch('/api/problems', {
        method: 'POST',
        headers: {'Content-Type': 'application/json'},
        body: JSON.stringify({id, name, category})
    });

    if (response.ok) {
        bootstrap.Modal.getInstance(document.getElementById('addModal')).hide();
        loadProblems();
    } else {
        const err = await response.json();
        alert(err.error || '创建失败');
    }
}

// 编辑
async function editProblem(problemId) {
    currentEditId = problemId;
    const response = await fetch(`/api/problems/${problemId}`);
    const data = await response.json();

    if (data.error) {
        alert(data.error);
        return;
    }

    const name = data.filename.replace(`${problemId}_`, '').replace('.md', '');
    document.getElementById('editProblemName').value = name;
    document.getElementById('editProblemContent').value = data.content;

    if (window.problemEditor) {
        window.problemEditor.toTextArea();
        window.problemEditor = null;
    }
    if (window.EasyMDE) {
        window.problemEditor = new EasyMDE({
            element: document.getElementById('editProblemContent'),
            spellChecker: false,
            status: false,
            toolbar: ['bold', 'italic', 'heading', '|', 'code', 'quote', 'unordered-list', '|', 'preview', 'side-by-side', 'fullscreen'],
            initialValue: data.content
        });
    }

    var editModal = new bootstrap.Modal(document.getElementById('editModal'));
    editModal.show();
    editModal._element.addEventListener('shown.bs.modal', function() {
        if (window.problemEditor && window.problemEditor.codemirror) {
            window.problemEditor.codemirror.refresh();
        }
    });
}

async function saveProblem() {
    const name = document.getElementById('editProblemName').value.trim();
    const content = window.problemEditor ? window.problemEditor.value() : document.getElementById('editProblemContent').value;

    if (!name) {
        alert('请填写名称');
        return;
    }

    const response = await fetch(`/api/problems/${currentEditId}`, {
        method: 'PUT',
        headers: {'Content-Type': 'application/json'},
        body: JSON.stringify({name, content})
    });

    if (response.ok) {
        bootstrap.Modal.getInstance(document.getElementById('editModal')).hide();
        if (window.problemEditor) {
            window.problemEditor.toTextArea();
            window.problemEditor = null;
        }
        loadProblems();
    } else {
        const err = await response.json();
        alert(err.error || '保存失败');
    }
}

// 删除
function showDeleteConfirm(problemId, problemName) {
    currentDeleteId = problemId;
    document.getElementById('deleteProblemName').textContent = problemName;
    new bootstrap.Modal(document.getElementById('deleteModal')).show();
}

async function confirmDelete() {
    const response = await fetch(`/api/problems/${currentDeleteId}`, {
        method: 'DELETE'
    });

    if (response.ok) {
        bootstrap.Modal.getInstance(document.getElementById('deleteModal')).hide();
        loadProblems();
    } else {
        const err = await response.json();
        alert(err.error || '删除失败');
    }
}
</script>
{% endblock %}