{% extends "base.html" %}
{% block title %}主页 - Plex Sync{% endblock %}
{% block content %}
<div class="d-flex flex-column flex-md-row align-items-md-center mb-4 gap-2">
    <div>
        <h1 class="h3 mb-1">播放列表概览</h1>
        <p class="text-body-secondary mb-0">浏览本地与云端同步的播放列表，随时刷新最新状态。</p>
    </div>
</div>

{% if message %}
<div class="alert alert-{{ message_type or 'info' }}" role="alert">
    {{ message }}
</div>
{% endif %}

<div class="card mb-4">
    <div class="card-body">
        <div class="d-flex flex-column flex-xl-row align-items-xl-center gap-3 mb-3">
            <div>
                <h5 class="card-title mb-0">选择同步策略</h5>
                <small class="text-body-secondary">根据需要选择单向覆盖或双向合并策略</small>
            </div>
            <form class="ms-xl-auto w-100 w-xl-auto" method="post" action="/sync">
                <div class="row gy-2 gx-2 align-items-end">
                    <div class="col-12 col-lg-8">
                        <label class="form-label mb-1">同步模式</label>
                        <select class="form-select" name="mode">
                            {% for option in sync_modes %}
                            <option value="{{ option.value }}" {% if selected_mode == option.value %}selected{% endif %}>
                                {{ option.label }}
                            </option>
                            {% endfor %}
                        </select>
                    </div>
                    <div class="col-auto">
                        <label class="form-label d-none d-lg-block">&nbsp;</label>
                        <div>
                            <button class="btn btn-primary" type="submit">
                                <i class="bi bi-play-fill"></i>
                                <span class="ms-1">开始同步</span>
                            </button>
                        </div>
                    </div>
                    <input type="hidden" name="local_path" value="{{ local_path }}">
                </div>
            </form>
        </div>
        <ul class="mb-0 text-body-secondary small ps-3">
            <li><strong>完全本地优先</strong>：本地列表直接覆盖云端，顺序以本地为准（无 diff）。</li>
            <li><strong>完全云端优先</strong>：云端列表直接覆盖本地，顺序以云端为准（无 diff）。</li>
            <li><strong>双向合并（本地优先）</strong>：三方合并，冲突时选本地。</li>
            <li><strong>双向合并（云端优先）</strong>：三方合并，冲突时选云端。</li>
        </ul>
        {% if sync_result %}
        <div class="alert alert-info mt-3 mb-0" role="alert">
            <div class="fw-semibold">{{ sync_result.mode_label }}</div>
            <div class="small mb-1">播放列表：{{ sync_result.playlist_count }}，删除：{{ sync_result.delete_count }}，合并曲目：{{ sync_result.merged_count }}，冲突数：{{ sync_result.conflict_count }}</div>
            <div class="small text-body-secondary">已写入：{{ sync_result.output_dir }}</div>
        </div>
        {% endif %}
    </div>
</div>

<div class="row g-4">
    <div class="col-12 col-xl-6">
        <div class="card h-100">
            <div class="card-body">
                <div class="d-flex flex-column flex-lg-row align-items-lg-center gap-3 mb-3">
                    <div>
                        <h5 class="card-title mb-0">本地播放列表</h5>
                        <small class="text-body-secondary">输入目录并刷新，读取挂载的播放列表文件</small>
                    </div>
                    <form class="ms-lg-auto w-100 w-lg-auto" method="get" action="/">
                        <div class="input-group">
                            <input type="text" class="form-control" name="local_path" value="{{ local_path }}" placeholder="playlist">
                            <button class="btn btn-outline-secondary" type="submit" title="刷新本地播放列表">
                                <i class="bi bi-arrow-clockwise"></i>
                                <span class="d-none d-sm-inline ms-1">刷新</span>
                            </button>
                        </div>
                    </form>
                </div>
                {% if local_playlists %}
                <ul class="list-group list-group-flush">
                    {% for playlist in local_playlists %}
                    <li class="list-group-item d-flex justify-content-between align-items-center">
                        <div>
                            <div class="fw-semibold">{{ playlist.name }}</div>
                            <div class="text-body-secondary small">曲目数</div>
                        </div>
                        <span class="badge rounded-pill text-bg-primary">{{ playlist.track_count }}</span>
                    </li>
                    {% endfor %}
                </ul>
                {% else %}
                <div class="text-body-secondary">未发现播放列表，请确认目录或点击刷新。</div>
                {% endif %}
            </div>
        </div>
    </div>

    <div class="col-12 col-xl-6">
        <div class="card h-100">
            <div class="card-body">
                <div class="d-flex flex-column flex-lg-row align-items-lg-center gap-3 mb-3">
                    <div>
                        <h5 class="card-title mb-0">云端播放列表</h5>
                        <small class="text-body-secondary">来自已连接的 Plex 服务器</small>
                        <div class="text-body-secondary small mt-1">当前音乐库：{{ selected_library or '暂无可用音乐库' }}</div>
                    </div>
                    <form class="ms-lg-auto" method="get" action="/">
                        <input type="hidden" name="local_path" value="{{ local_path }}">
                        <div class="d-flex align-items-center gap-2">
                            <div class="d-flex align-items-center gap-2 text-body-secondary small">
                                <span class="status-dot status-{{ connection_status }}"></span>
                                <span>
                                    {{ server_info.name }}
                                    <span class="text-body-secondary">· {{ server_info.domain }}</span>
                                </span>
                            </div>
                            <button class="btn btn-outline-secondary" type="submit" title="刷新云端播放列表">
                                <i class="bi bi-arrow-clockwise"></i>
                                <span class="d-none d-sm-inline ms-1">刷新</span>
                            </button>
                        </div>
                    </form>
                </div>
                {% if cloud_playlists %}
                <ul class="list-group list-group-flush">
                    {% for playlist in cloud_playlists %}
                    <li class="list-group-item d-flex justify-content-between align-items-center">
                        <div>
                            <div class="fw-semibold">{{ playlist.name }}</div>
                            <div class="text-body-secondary small">曲目数</div>
                        </div>
                        <span class="badge rounded-pill text-bg-success">{{ playlist.track_count }}</span>
                    </li>
                    {% endfor %}
                </ul>
                {% else %}
                <div class="text-body-secondary">暂无云端播放列表，检查连接或刷新重试。</div>
                {% endif %}
            </div>
        </div>
    </div>
</div>

<div class="card mt-4">
    <div class="card-body">
        <div class="d-flex flex-column flex-lg-row align-items-lg-center gap-3 mb-3">
            <div>
                <h5 class="card-title mb-0">路径正则替换</h5>
                <small class="text-body-secondary">同步前按顺序处理每一首歌曲的路径，解决不同挂载路径的差异</small>
            </div>
        </div>
        <form id="pathRuleForm" method="post" action="/path-rules">
            <input type="hidden" name="local_path" value="{{ local_path }}">
            <div id="ruleList" class="d-flex flex-column gap-2 mb-3"></div>
            <div class="d-flex align-items-center gap-3 mb-3">
                <button class="btn btn-outline-primary rounded-circle rule-add-btn" type="button" id="addRuleBtn"
                    title="添加新的正则规则">
                    <i class="bi bi-plus-lg"></i>
                </button>
                <div class="text-body-secondary small">从上到下依次匹配，左侧填写正则表达式，右侧填写替换结果。</div>
            </div>
            <div class="d-flex justify-content-end gap-2">
                <button class="btn btn-outline-secondary" type="button" id="cancelRulesBtn">
                    <i class="bi bi-arrow-counterclockwise"></i>
                    <span class="ms-1">取消变更</span>
                </button>
                <button class="btn btn-success" type="submit">
                    <i class="bi bi-save"></i>
                    <span class="ms-1">保存规则</span>
                </button>
            </div>
        </form>
    </div>
</div>

<template id="ruleRowTemplate">
    <div class="input-group rule-row">
        <span class="input-group-text">匹配</span>
        <input type="text" class="form-control" name="pattern" placeholder="正则表达式" required>
        <span class="input-group-text">替换为</span>
        <input type="text" class="form-control" name="replacement" placeholder="替换文本">
        <button class="btn btn-outline-danger" type="button" title="删除此规则">
            <i class="bi bi-x-lg"></i>
        </button>
    </div>
</template>

<script>
    const existingRules = {{ path_rules | tojson | safe }};
    const ruleList = document.getElementById('ruleList');
    const addRuleBtn = document.getElementById('addRuleBtn');
    const cancelRulesBtn = document.getElementById('cancelRulesBtn');
    const template = document.getElementById('ruleRowTemplate');

    const initialRules = existingRules.length
        ? existingRules.map(rule => ({ ...rule }))
        : [{ pattern: '', replacement: '' }];

    function bindRemoveButton(row) {
        const removeBtn = row.querySelector('button');
        removeBtn.addEventListener('click', () => {
            row.remove();
        });
    }

    function addRuleRow(pattern = '', replacement = '') {
        const clone = template.content.cloneNode(true);
        const row = clone.querySelector('.rule-row');
        const [patternInput, replacementInput] = row.querySelectorAll('input');
        patternInput.value = pattern;
        replacementInput.value = replacement;
        bindRemoveButton(row);
        ruleList.appendChild(clone);
    }

    function renderRules(rules) {
        ruleList.innerHTML = '';
        if (!rules.length) {
            addRuleRow();
            return;
        }
        rules.forEach(rule => addRuleRow(rule.pattern || '', rule.replacement || ''));
    }

    addRuleBtn.addEventListener('click', () => addRuleRow());
    cancelRulesBtn.addEventListener('click', () => renderRules(initialRules));

    renderRules(initialRules);
</script>
{% endblock %}