{extend name="admin/layout" /}
{block name="title"}编辑导航{/block}
{block name="main"}

<div class="row">
    <div class="col-xs-12 col-sm-8 col-lg-6" style="float: none;">
        <div class="panel panel-info">
            <div class="panel-heading">
                <h3 class="panel-title">编辑导航</h3>
            </div>
            <div class="panel-body">
                <form onsubmit="return navEdit(this)" method="post" class="form-horizontal" role="form">
                    <input type="hidden" name="id" value="{$info.nid}"/>
                    <div class="form-group">
                        <label class="col-sm-3 control-label">导航标题</label>
                        <div class="col-sm-9">
                            <input type="text" name="name" value="{$info.name}" placeholder="请输入导航标题..." class="form-control"/>
                        </div>
                    </div>

                    <div class="form-group">
                        <label class="col-sm-3 control-label">数据类型</label>
                        <div class="col-sm-9">
                            <select name="type" class="form-control">
                                <option value="1" {if $info.type==1}selected{/if}>Logo显示</option>
                                <option value="2" {if $info.type==2}selected{/if}>优惠显示</option>
                            </select>
                        </div>
                    </div>

                    <div class="form-group">
                        <label class="col-sm-3 control-label">导航介绍</label>
                        <div class="col-sm-9">
                            <textarea name="desc" placeholder="请输入导航介绍..." class="form-control" rows="3">{$info.desc}</textarea>
                        </div>
                    </div>

                    <div class="form-group">
                        <label class="col-sm-3 control-label">主要Logo</label>
                        <div class="col-sm-9">
                            <input type="file" name="main_logo" id="mainLogoInput" class="form-control" accept="image/*" onchange="previewImage(this, 'mainLogoPreview')"/>
                            <div id="mainLogoPreview" style="margin-top: 10px; max-width: 200px;">
                                <img src="{$info.main_logo|default=''}" style="max-width: 100%; {if empty($info.main_logo)}display: none;{/if}" class="img-thumbnail"/>
                            </div>
                        </div>
                    </div>

                    <div class="form-group">
                        <label class="col-sm-3 control-label">右侧Logo</label>
                        <div class="col-sm-9">
                            <input type="file" name="subplot" id="subplotInput" class="form-control" accept="image/*" onchange="previewImage(this, 'subplotPreview')"/>
                            <div id="subplotPreview" style="margin-top: 10px; max-width: 200px;">
                                <img src="{$info.subplot|default=''}" style="max-width: 100%; {if empty($info.subplot)}display: none;{/if}" class="img-thumbnail"/>
                            </div>
                        </div>
                    </div>

                    <div class="form-group">
                        <div class="col-sm-offset-3 col-sm-9">
                            <input type="submit" name="submit" value="确认修改" class="btn btn-primary btn-block"/>
                        </div>
                    </div>
                </form>
            </div>
        </div>
    </div>
</div>

{/block}

{block name="script"}
<script src="https://s4.zstatic.net/ajax/libs/layer/3.1.1/layer.js"></script>
<script>
    function previewImage(input, previewId) {
        const preview = document.querySelector(`#${previewId} img`);
        if (input.files && input.files[0]) {
            const reader = new FileReader();
            
            reader.onload = function(e) {
                preview.src = e.target.result;
                preview.style.display = 'block';
            }
            
            reader.readAsDataURL(input.files[0]);
        }
    }

    function navEdit(form) {
        const formData = new FormData(form);
        
        // 检查必填字段
        if (!formData.get('name')) {
            layer.msg('请输入导航标题', {icon: 2});
            return false;
        }
        
        // 如果没有选择文件，删除对应的字段
        const mainLogoInput = form.querySelector('input[name="main_logo"]');
        if (!mainLogoInput.files || !mainLogoInput.files[0]) {
            formData.delete('main_logo');
        }
        
        const subplotInput = form.querySelector('input[name="subplot"]');
        if (!subplotInput.files || !subplotInput.files[0]) {
            formData.delete('subplot');
        }
        
        $.ajax({
            url: '/admin/navEdit',
            type: 'POST',
            data: formData,
            processData: false,
            contentType: false,
            success: function(res) {
                if (res.code === 200) {
                    layer.msg(res.message, {icon: 1});
                    setTimeout(function() {
                        window.location.href = '/admin/nav';
                    }, 1500);
                } else {
                    layer.msg(res.message, {icon: 2});
                }
            },
            error: function() {
                layer.msg('服务器错误', {icon: 2});
            }
        });
        return false;
    }
</script>
{/block}