{% extends "base.html" %}

{% block content %}
<div class="container-fluid py-4">
    <h2 class="mb-4">🎯 目标管理</h2>

    <!-- 目标列表 -->
    <div class="row">
        <div class="col-12">
            <div class="card">
                <div class="card-header d-flex justify-content-between align-items-center">
                    <h5 class="mb-0">目标库</h5>
                    <button class="btn btn-primary btn-sm" data-bs-toggle="modal" data-bs-target="#goalModal">
                        + 新建目标
                    </button>
                </div>
                <div class="card-body">
                    <div id="goals-grid" class="row g-3"></div>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- 目标编辑 Modal -->
<div class="modal fade" id="goalModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="goalModalTitle">新建目标</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <input type="hidden" id="goal-id">
                <div class="mb-3">
                    <label class="form-label">目标名称</label>
                    <input type="text" class="form-control" id="goal-name" required>
                </div>
                <div class="mb-3">
                    <label class="form-label">目标内容 (Markdown)</label>
                    <textarea class="form-control" id="goal-content" rows="8"></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" id="save-goal">保存</button>
            </div>
        </div>
    </div>
</div>

<!-- 关系管理 Modal -->
<div class="modal fade" id="relationModal" tabindex="-1">
    <div class="modal-dialog modal-lg">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">管理目标关系</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <input type="hidden" id="relation-goal-id">
                <h6>上级目标（父目标）</h6>
                <div id="parent-goals" class="mb-3"></div>
                <hr>
                <h6>下级目标（子目标）</h6>
                <div id="child-goals" class="mb-3"></div>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block scripts %}
{{ super() }}
<script>
const API_BASE = '/api/goals';

// 加载目标列表
async function loadGoals() {
    const res = await fetch(API_BASE);
    const goals = await res.json();
    const grid = document.getElementById('goals-grid');
    grid.innerHTML = goals.map(g => `
        <div class="col-md-4 col-lg-3">
            <div class="card h-100">
                <div class="card-body">
                    <h6 class="card-title">${escapeHtml(g.name)}</h6>
                    <p class="card-text small text-muted">${escapeHtml(g.content || '').substring(0, 100)}...</p>
                </div>
                <div class="card-footer bg-transparent">
                    <button class="btn btn-sm btn-outline-primary" onclick="editGoal(${g.id})">编辑</button>
                    <button class="btn btn-sm btn-outline-secondary" onclick="manageRelations(${g.id})">关联</button>
                    <button class="btn btn-sm btn-outline-danger" onclick="deleteGoal(${g.id})">删除</button>
                </div>
            </div>
        </div>
    `).join('');
}

// 保存目标
async function saveGoal() {
    const id = document.getElementById('goal-id').value;
    const name = document.getElementById('goal-name').value;
    const content = document.getElementById('goal-content').value;

    if (!name) { alert('请输入目标名称'); return; }

    const method = id ? 'PUT' : 'POST';
    const url = id ? `${API_BASE}/${id}` : API_BASE;

    const res = await fetch(url, {
        method,
        headers: {'Content-Type': 'application/json'},
        body: JSON.stringify({name, content})
    });

    if (res.ok) {
        bootstrap.Modal.getInstance(document.getElementById('goalModal')).hide();
        loadGoals();
    }
}

function editGoal(id) {
    fetch(`${API_BASE}/${id}`)
        .then(r => r.json())
        .then(g => {
            document.getElementById('goal-id').value = g.id;
            document.getElementById('goal-name').value = g.name;
            document.getElementById('goal-content').value = g.content || '';
            document.getElementById('goalModalTitle').textContent = '编辑目标';
            new bootstrap.Modal(document.getElementById('goalModal')).show();
        });
}

async function deleteGoal(id) {
    if (!confirm('确定删除此目标？')) return;
    await fetch(`${API_BASE}/${id}`, {method: 'DELETE'});
    loadGoals();
}

async function manageRelations(id) {
    document.getElementById('relation-goal-id').value = id;

    const [parents, children] = await Promise.all([
        fetch(`${API_BASE}/${id}/parents`).then(r => r.json()),
        fetch(`${API_BASE}/${id}/children`).then(r => r.json())
    ]);

    document.getElementById('parent-goals').innerHTML = parents.map(g =>
        `<span class="badge bg-info me-1 mb-1">${escapeHtml(g.name)} <button type="button" class="btn-close btn-close-white ms-1" onclick="removeRelation(${id}, ${g.id}, 'parent')"></button></span>`
    ).join('') || '<span class="text-muted">无</span>';

    document.getElementById('child-goals').innerHTML = children.map(g =>
        `<span class="badge bg-primary me-1 mb-1">${escapeHtml(g.name)} <button type="button" class="btn-close btn-close-white ms-1" onclick="removeRelation(${id}, ${g.id}, 'child')"></button></span>`
    ).join('') || '<span class="text-muted">无</span>';

    new bootstrap.Modal(document.getElementById('relationModal')).show();
}

async function removeRelation(parentId, childId, type) {
    const url = type === 'parent'
        ? `${API_BASE}/${childId}/children/${parentId}`
        : `${API_BASE}/${parentId}/children/${childId}`;
    await fetch(url, {method: 'DELETE'});
    manageRelations(parentId);
}

function escapeHtml(text) {
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
}

document.getElementById('save-goal').addEventListener('click', saveGoal);
document.getElementById('goalModal').addEventListener('hidden.bs.modal', () => {
    document.getElementById('goal-id').value = '';
    document.getElementById('goalModalTitle').textContent = '新建目标';
});

loadGoals();
</script>
{% endblock %}