{% extends "base.html" %}

{% block title %}模板管理 - 钢琴练习方案系统{% endblock %}

{% block page_css %}
<style>
.template-card { cursor: pointer; transition: all 0.2s; }
.template-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.template-card.active { border-color: #667eea; background: #f8f9ff; }
.preview-pane { background: white; border-radius: 8px; padding: 20px; min-height: 300px; }
.preview-content { white-space: pre-wrap; font-family: monospace; font-size: 13px; line-height: 1.6; }
</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" href="/settings">
    <i class="bi bi-gear"></i> 问题配置
</a>
<a class="nav-link" href="/api-settings">
    <i class="bi bi-key"></i> API设置
</a>
<a class="nav-link active" href="/templates">
    <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="logout()">
    <i class="bi bi-box-arrow-right"></i> 退出登录
</a>
{% endblock %}

{% block content %}
<div class="d-flex justify-content-between align-items-center mb-4">
    <h4><i class="bi bi-file-earmark-text"></i> 模板管理</h4>
    <button class="btn btn-primary" onclick="showCreateModal()">
        <i class="bi bi-plus"></i> 新建模板
    </button>
</div>

<div class="alert alert-info">
    <i class="bi bi-info-circle"></i>
    模板管理用于维护AI提示词和报告导出格式。只有管理员可以修改。
    可用变量在模板中用 <code>{变量名}</code> 格式使用。
</div>

<div class="row">
    <div class="col-md-4">
        <div class="card">
            <div class="card-header">
                <h6 class="mb-0"><i class="bi bi-list"></i> 模板列表</h6>
            </div>
            <div class="card-body p-0" id="templateList"></div>
        </div>
    </div>
    <div class="col-md-8">
        <div class="card" id="templateEditor" style="display:none;">
            <div class="card-header d-flex justify-content-between align-items-center">
                <h6 class="mb-0" id="editorTitle">编辑模板</h6>
                <div>
                    <button class="btn btn-sm btn-success" onclick="saveTemplate()">
                        <i class="bi bi-save"></i> 保存
                    </button>
                    <button class="btn btn-sm btn-outline-danger" onclick="deleteCurrentTemplate()">
                        <i class="bi bi-trash"></i> 删除
                    </button>
                </div>
            </div>
            <div class="card-body">
                <div class="mb-3">
                    <label class="form-label">模板名称</label>
                    <input type="text" class="form-control" id="templateName">
                </div>
                <div class="mb-3">
                    <label class="form-label">模板类型</label>
                    <select class="form-select" id="templateType" disabled>
                        <option value="ai_prompt">AI提示词模板</option>
                        <option value="report">报告导出模板</option>
                    </select>
                </div>
                <div class="mb-3">
                    <label class="form-label">模板描述</label>
                    <input type="text" class="form-control" id="templateDesc" placeholder="模板用途说明">
                </div>
                <div class="mb-3">
                    <label class="form-label">排序</label>
                    <input type="number" class="form-control" id="templateSortOrder" value="0" min="0">
                    <small class="text-muted">数字越小排越前</small>
                </div>
                <div class="mb-3">
                    <label class="form-label">模板内容</label>
                    <textarea id="templateContent"></textarea>
                </div>
            </div>
        </div>

        <div class="text-muted text-center mt-5" id="emptyHint">
            <i class="bi bi-arrow-left"></i> 请从左侧选择一个模板进行编辑
        </div>
    </div>
</div>

<!-- 创建模板弹窗 -->
<div class="modal fade" id="createModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">新建模板</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">模板名称</label>
                    <input type="text" class="form-control" id="newTemplateName" placeholder="输入模板名称">
                </div>
                <div class="mb-3">
                    <label class="form-label">模板类型</label>
                    <select class="form-select" id="newTemplateType">
                        <option value="ai_prompt">AI提示词模板</option>
                        <option value="report">报告导出模板</option>
                    </select>
                </div>
                <div class="mb-3">
                    <label class="form-label">模板描述</label>
                    <input type="text" class="form-control" id="newTemplateDesc" placeholder="模板用途说明">
                </div>
                <div class="mb-3">
                    <label class="form-label">排序</label>
                    <input type="number" class="form-control" id="newTemplateSortOrder" value="0" min="0">
                    <small class="text-muted">数字越小排越前</small>
                </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="createTemplate()">创建</button>
            </div>
        </div>
    </div>
</div>
{% endblock %}

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

document.addEventListener('DOMContentLoaded', () => {
    createModal = new bootstrap.Modal(document.getElementById('createModal'));
    checkLogin();
});

function checkLogin() {
    fetch('/api/check-login').then(r => r.json()).then(data => {
        if (!data.logged_in) {
            window.location.href = '/login';
            return;
        }
        const userDisplay = data.username + ' (' + (data.role === 'admin' ? '管理员' : '用户') + ')';
        document.getElementById('currentUserDisplay').textContent = userDisplay;
        const mobileDisplay = document.getElementById('mobileUserDisplay');
        if (mobileDisplay) mobileDisplay.textContent = userDisplay;

        if (data.role === 'admin') {
            document.getElementById('usersNav').style.display = '';
        }
        loadTemplates();
    }).catch(() => {
        window.location.href = '/login';
    });
}

async function loadTemplates() {
    const resp = await fetch('/templates/templates');
    templates = await resp.json();
    renderTemplateList();
}

function renderTemplateList() {
    const list = document.getElementById('templateList');
    if (templates.length === 0) {
        list.innerHTML = '<div class="p-3 text-muted">暂无模板</div>';
        return;
    }
    list.innerHTML = templates.map(t => `
        <div class="template-card card m-2 p-2 ${currentTemplate && currentTemplate.id === t.id ? 'active' : ''}"
            onclick="selectTemplate(${t.id})">
            <div class="d-flex justify-content-between align-items-center">
                <div>
                    <strong>${t.name}</strong>
                    <br><small class="text-muted">${t.type === 'ai_prompt' ? 'AI提示词' : '报告模板'}</small>
                </div>
                <i class="bi bi-chevron-right"></i>
            </div>
        </div>
    `).join('');
}

async function selectTemplate(id) {
    currentTemplate = templates.find(t => t.id === id);
    if (!currentTemplate) return;

    document.getElementById('templateEditor').style.display = 'block';
    document.getElementById('emptyHint').style.display = 'none';

    document.getElementById('templateName').value = currentTemplate.name;
    document.getElementById('templateType').value = currentTemplate.type;
    document.getElementById('templateDesc').value = currentTemplate.description || '';
    document.getElementById('templateSortOrder').value = currentTemplate.sort_order || 0;

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

    renderTemplateList();
}

function showCreateModal() {
    document.getElementById('newTemplateName').value = '';
    document.getElementById('newTemplateType').value = 'ai_prompt';
    document.getElementById('newTemplateDesc').value = '';
    document.getElementById('newTemplateSortOrder').value = '0';
    createModal.show();
}

async function createTemplate() {
    const name = document.getElementById('newTemplateName').value.trim();
    const type = document.getElementById('newTemplateType').value;
    const desc = document.getElementById('newTemplateDesc').value.trim();
    const sort_order = parseInt(document.getElementById('newTemplateSortOrder').value) || 0;

    if (!name) { alert('请输入模板名称'); return; }

    const resp = await fetch('/templates/templates', {
        method: 'POST',
        headers: {'Content-Type': 'application/json'},
        body: JSON.stringify({name, type, content: '', description: desc, sort_order})
    });

    if (resp.ok) {
        createModal.hide();
        await loadTemplates();
    } else {
        alert('创建失败');
    }
}

async function saveTemplate() {
    if (!currentTemplate) return;

    const name = document.getElementById('templateName').value.trim();
    const content = editor ? editor.value() : document.getElementById('templateContent').value;
    const description = document.getElementById('templateDesc').value;
    const sort_order = parseInt(document.getElementById('templateSortOrder').value) || 0;

    if (!name) { alert('请输入模板名称'); return; }

    const resp = await fetch(`/templates/templates/${currentTemplate.id}`, {
        method: 'PUT',
        headers: {'Content-Type': 'application/json'},
        body: JSON.stringify({name, content, description, sort_order})
    });

    if (resp.ok) {
        currentTemplate.name = name;
        currentTemplate.content = content;
        currentTemplate.description = description;
        currentTemplate.sort_order = sort_order;
        alert('保存成功');
        renderTemplateList();
    } else {
        alert('保存失败');
    }
}

async function deleteCurrentTemplate() {
    if (!currentTemplate) return;
    if (!confirm('确定要删除这个模板吗？')) return;

    const resp = await fetch(`/templates/templates/${currentTemplate.id}`, {method: 'DELETE'});
    if (resp.ok) {
        currentTemplate = null;
        document.getElementById('templateEditor').style.display = 'none';
        document.getElementById('emptyHint').style.display = 'block';
        if (editor) { editor.toTextArea(); editor = null; }
        await loadTemplates();
    } else {
        alert('删除失败');
    }
}
</script>
{% endblock %}