// 页面加载完成后执行
document.addEventListener('DOMContentLoaded', function() {
    // 初始化图片预览功能
    initImagePreview('uploadFile', 'uploadPreviewContainer');
    initImagePreview('searchFile', 'searchPreview');
    
    // 初始化表单提交事件
    initUploadForm();
    initSearchForm();
    initUpdateForm();
    initDeleteForm();
    initBatchDeleteButtons();
});

// 初始化图片预览功能
function initImagePreview(inputId, containerId) {
    const input = document.getElementById(inputId);
    const container = document.getElementById(containerId || 'uploadPreviewContainer');
    
    if (input && container) {
        input.addEventListener('change', function() {
            // 清空预览容器
            container.innerHTML = '';
            
            if (this.files && this.files.length > 0) {
                // 遍历所有选择的文件
                Array.from(this.files).forEach((file, index) => {
                    const reader = new FileReader();
                    const previewDiv = document.createElement('div');
                    previewDiv.className = 'preview-item';
                    
                    const previewImg = document.createElement('img');
                    previewImg.className = 'img-preview';
                    previewImg.alt = `预览图 ${index + 1}`;
                    
                    previewDiv.appendChild(previewImg);
                    container.appendChild(previewDiv);
                    
                    reader.onload = function(e) {
                        previewImg.src = e.target.result;
                    };
                    
                    reader.readAsDataURL(file);
                });
            }
        });
    }
}

// 初始化上传表单
function initUploadForm() {
    const form = document.getElementById('uploadForm');
    
    if (form) {
        form.addEventListener('submit', async function(e) {
            e.preventDefault();
            
            const files = document.getElementById('uploadFile').files;
            if (!files || files.length === 0) {
                alert('请选择至少一个文件');
                return;
            }
            
            const resultDiv = document.getElementById('uploadResult');
            resultDiv.innerHTML = '<div class="alert alert-info"><div class="spinner-border text-primary" role="status"></div>正在上传，请稍候...</div>';
            
            let successCount = 0;
            let errorCount = 0;
            let results = [];
            
            // 获取表单基本数据
            const type = document.getElementById('imageType').value;
            const description = document.getElementById('imageDescription').value;
            const name = document.getElementById('imageName').value;
            const tags = document.getElementById('imageTags').value || '1'; // 默认为1
            
            // 依次上传每个文件
            for (let i = 0; i < files.length; i++) {
                const file = files[i];
                const formData = new FormData();
                
                // 添加当前文件
                formData.append('file', file);
                
                // 添加其他表单数据
                formData.append('type', type);
                formData.append('description', description);
                formData.append('name', `${name}_${i+1}`);
                formData.append('tags', tags);
                
                try {
                    const response = await fetch('/imgsearcherApi/upload', {
                        method: 'POST',
                        body: formData
                    });
                    
                    const data = await response.json();
                    
                    if (data.error) {
                        errorCount++;
                    } else {
                        successCount++;
                        results.push(data);
                    }
                } catch (error) {
                    errorCount++;
                }
                
                // 更新进度信息
                resultDiv.innerHTML = `
                    <div class="alert alert-info">
                        <div class="progress mb-2">
                            <div class="progress-bar" role="progressbar" style="width: ${Math.round((i+1) / files.length * 100)}%" aria-valuenow="${i+1}" aria-valuemin="0" aria-valuemax="${files.length}">${Math.round((i+1) / files.length * 100)}%</div>
                        </div>
                        <p>正在上传: ${i+1}/${files.length}</p>
                        <p>成功: ${successCount}, 失败: ${errorCount}</p>
                    </div>
                `;
            }
            
            // 显示最终结果
            if (successCount > 0) {
                let resultHTML = `
                    <div class="alert alert-success">
                        <h5>上传完成！</h5>
                        <p>成功上传: ${successCount}张图片</p>
                        <p>上传失败: ${errorCount}张图片</p>
                    </div>
                `;
                
                if (results.length > 0) {
                    resultHTML += '<div class="mt-3"><h6>上传成功的图片:</h6><ul>';
                    results.forEach((result, index) => {
                        resultHTML += `<li>图片${index+1} - 签名: ${result.cont_sign}</li>`;
                    });
                    resultHTML += '</ul></div>';
                }
                
                resultDiv.innerHTML = resultHTML;
                
                // 重置表单
                form.reset();
                document.getElementById('uploadPreviewContainer').innerHTML = '';
                document.getElementById('imageTags').value = '1'; // 重置后设置默认值为1
            } else {
                resultDiv.innerHTML = `<div class="alert alert-danger">所有图片上传失败</div>`;
            }
        });
        
        // 设置默认标签值
        const tagsInput = document.getElementById('imageTags');
        if (tagsInput && !tagsInput.value) {
            tagsInput.value = '1';
        }
    }
}

// 初始化搜索表单
function initSearchForm() {
    const form = document.getElementById('searchForm');
    
    if (form) {
        // 设置默认标签值
        const tagsInput = document.getElementById('searchTags');
        if (tagsInput && !tagsInput.value) {
            tagsInput.value = '1';
        }
        
        form.addEventListener('submit', function(e) {
            e.preventDefault();
            
            const formData = new FormData(this);
            const resultDiv = document.getElementById('searchResult');
            const resultList = document.getElementById('searchResultList');
            const resultStats = document.getElementById('searchStats');
            const resultCount = document.getElementById('resultCount');
            const batchActions = document.querySelector('.batch-actions');
            const reliableTypesInfo = document.getElementById('reliableTypesInfo');
            
            resultList.innerHTML = '<div class="col-12 text-center"><div class="spinner-border text-primary" role="status"></div> 正在搜索，请稍候...</div>';
            resultStats.classList.add('d-none');
            batchActions.classList.add('d-none');
            reliableTypesInfo.classList.add('d-none');
            
            fetch('/imgsearcherApi/search', {
                method: 'POST',
                body: formData
            })
            .then(response => response.json())
            .then(data => {
                if (data.error) {
                    resultList.innerHTML = `<div class="col-12"><div class="alert alert-danger">${data.error}</div></div>`;
                } else {
                    // 显示搜索结果统计
                    resultCount.textContent = data.result_num || 0;
                    resultStats.classList.remove('d-none');
                    
                    // 显示最可信类型分析结果
                    if (data.most_reliable_types) {
                        reliableTypesInfo.classList.remove('d-none');
                        document.getElementById('method1Type').textContent = data.most_reliable_types.method1 || '-';
                        document.getElementById('method2Type').textContent = data.most_reliable_types.method2 || '-';
                        document.getElementById('method3Type').textContent = data.most_reliable_types.method3 || '-';
                        document.getElementById('method4Type').textContent = data.most_reliable_types.method4 || '-';
                        document.getElementById('method5Type').textContent = data.most_reliable_types.method5 || '-';
                    } else {
                        reliableTypesInfo.classList.add('d-none');
                    }
                    
                    // 清空结果列表
                    resultList.innerHTML = '';
                    
                    if (data.result && data.result.length > 0) {
                        // 显示搜索结果
                        data.result.forEach(item => {
                            // 解析brief信息
                            let briefInfo = {};
                            try {
                                briefInfo = JSON.parse(item.brief);
                            } catch (e) {
                                briefInfo = { type: '未知', description: '未知', name: '未知' };
                            }
                            
                            const resultItem = document.createElement('div');
                            resultItem.className = 'col-md-4 col-sm-6 result-item';
                            resultItem.innerHTML = `
                                <div class="card result-card">
                                    <div class="result-img-container">
                                        <div class="select-checkbox">
                                            <input type="checkbox" class="item-checkbox" data-cont-sign="${item.cont_sign}">
                                        </div>
                                        <img class="result-img" src="/static/img/placeholder.png" alt="${briefInfo.name || '图片'}">
                                    </div>
                                    <div class="result-info">
                                        <h5>${briefInfo.name || '未命名图片'}</h5>
                                        <p>类型: ${briefInfo.type || '未指定'}</p>
                                        <p>描述: ${briefInfo.description ? (briefInfo.description.length > 30 ? briefInfo.description.substring(0, 30) + '...' : briefInfo.description) : '无描述'}</p>
                                        <p>相似度: <span class="result-score">${(item.score * 100).toFixed(2)}%</span></p>
                                        <div class="result-actions">
                                            <button class="btn btn-sm btn-outline-primary update-btn" 
                                                data-cont-sign="${item.cont_sign}" 
                                                data-type="${briefInfo.type || ''}" 
                                                data-description="${briefInfo.description || ''}" 
                                                data-name="${briefInfo.name || ''}"
                                                data-bs-toggle="modal" 
                                                data-bs-target="#updateModal">
                                                编辑
                                            </button>
                                            <button class="btn btn-sm btn-outline-danger delete-btn" 
                                                data-cont-sign="${item.cont_sign}"
                                                data-bs-toggle="modal" 
                                                data-bs-target="#deleteModal">
                                                删除
                                            </button>
                                        </div>
                                    </div>
                                </div>
                            `;
                            resultList.appendChild(resultItem);
                        });
                        
                        // 初始化编辑和删除按钮事件
                        initResultButtons();
                        // 初始化批量删除功能
                        initBatchDelete();
                    } else {
                        resultList.innerHTML = '<div class="col-12"><div class="alert alert-warning">没有找到匹配的图片</div></div>';
                    }
                }
            })
            .catch(error => {
                resultList.innerHTML = `<div class="col-12"><div class="alert alert-danger">搜索失败: ${error.message}</div></div>`;
            });
        });
    }
}

// 初始化搜索结果中的按钮事件
function initResultButtons() {
    // 更新按钮点击事件
    document.querySelectorAll('.update-btn').forEach(button => {
        button.addEventListener('click', function() {
            const contSign = this.getAttribute('data-cont-sign');
            const type = this.getAttribute('data-type');
            const description = this.getAttribute('data-description');
            const name = this.getAttribute('data-name');
            
            document.getElementById('updateContSign').value = contSign;
            document.getElementById('updateType').value = type;
            document.getElementById('updateDescription').value = description;
            document.getElementById('updateName').value = name;
        });
    });
    
    // 删除按钮点击事件
    document.querySelectorAll('.delete-btn').forEach(button => {
        button.addEventListener('click', function() {
            const contSign = this.getAttribute('data-cont-sign');
            document.getElementById('deleteContSign').value = contSign;
        });
    });
}

// 初始化更新表单
function initUpdateForm() {
    const updateButton = document.getElementById('updateSubmit');
    
    if (updateButton) {
        updateButton.addEventListener('click', function() {
            const contSign = document.getElementById('updateContSign').value;
            const type = document.getElementById('updateType').value;
            const description = document.getElementById('updateDescription').value;
            const name = document.getElementById('updateName').value;
            const tags = document.getElementById('updateTags').value || '1';
            
            // 创建brief信息
            const brief = {
                type: type,
                description: description,
                name: name
            };
            
            // 发送更新请求
            fetch('/imgsearcherApi/update', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({
                    cont_sign: contSign,
                    brief: brief,
                    tags: tags
                })
            })
            .then(response => response.json())
            .then(data => {
                // 关闭模态框
                const modal = bootstrap.Modal.getInstance(document.getElementById('updateModal'));
                modal.hide();
                
                if (data.error) {
                    alert(`更新失败: ${data.error}`);
                } else {
                    alert('更新成功！');
                    // 如果当前在搜索标签页，刷新搜索结果
                    if (document.getElementById('search-tab').classList.contains('active')) {
                        document.getElementById('searchForm').dispatchEvent(new Event('submit'));
                    }
                }
            })
            .catch(error => {
                alert(`更新失败: ${error.message}`);
            });
        });
    }
}

// 初始化删除表单
function initDeleteForm() {
    const deleteButton = document.getElementById('deleteSubmit');
    
    if (deleteButton) {
        deleteButton.addEventListener('click', function() {
            const contSign = document.getElementById('deleteContSign').value;
            
            // 发送删除请求
            fetch('/imgsearcherApi/delete', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({
                    cont_sign: contSign
                })
            })
            .then(response => response.json())
            .then(data => {
                // 关闭模态框
                const modal = bootstrap.Modal.getInstance(document.getElementById('deleteModal'));
                modal.hide();
                
                if (data.error) {
                    alert(`删除失败: ${data.error}`);
                } else {
                    alert('删除成功！');
                    // 如果当前在搜索标签页，刷新搜索结果
                    if (document.getElementById('search-tab').classList.contains('active')) {
                        document.getElementById('searchForm').dispatchEvent(new Event('submit'));
                    }
                }
            })
            .catch(error => {
                alert(`删除失败: ${error.message}`);
            });
        });
    }
}

// 初始化批量删除按钮
function initBatchDeleteButtons() {
    const batchDeleteBtn = document.getElementById('batchDeleteBtn');
    const cancelSelectionBtn = document.getElementById('cancelSelectionBtn');
    const selectAllCheckbox = document.getElementById('selectAllCheckbox');
    
    if (batchDeleteBtn) {
        batchDeleteBtn.addEventListener('click', function() {
            const selectedItems = document.querySelectorAll('.item-checkbox:checked');
            
            if (selectedItems.length === 0) {
                alert('请选择要删除的图片');
                return;
            }
            
            if (confirm(`确定要删除选中的 ${selectedItems.length} 张图片吗？此操作不可撤销。`)) {
                batchDelete(selectedItems);
            }
        });
    }
    
    if (cancelSelectionBtn) {
        cancelSelectionBtn.addEventListener('click', function() {
            document.querySelectorAll('.item-checkbox').forEach(checkbox => {
                checkbox.checked = false;
            });
            if (selectAllCheckbox) {
                selectAllCheckbox.checked = false;
            }
            document.querySelector('.batch-actions').classList.add('d-none');
        });
    }
    
    // 全选功能
    if (selectAllCheckbox) {
        selectAllCheckbox.addEventListener('change', function() {
            const checkboxes = document.querySelectorAll('.item-checkbox');
            const batchActions = document.querySelector('.batch-actions');
            
            checkboxes.forEach(checkbox => {
                checkbox.checked = this.checked;
            });
            
            if (this.checked && checkboxes.length > 0) {
                batchActions.classList.remove('d-none');
            } else {
                batchActions.classList.add('d-none');
            }
        });
    }
}

// 初始化批量删除功能
function initBatchDelete() {
    const checkboxes = document.querySelectorAll('.item-checkbox');
    const batchActions = document.querySelector('.batch-actions');
    const selectAllCheckbox = document.getElementById('selectAllCheckbox');
    
    checkboxes.forEach(checkbox => {
        checkbox.addEventListener('change', function() {
            const checkedBoxes = document.querySelectorAll('.item-checkbox:checked');
            const anyChecked = checkedBoxes.length > 0;
            const allChecked = checkedBoxes.length === checkboxes.length;
            
            // 更新全选复选框状态
            if (selectAllCheckbox) {
                selectAllCheckbox.checked = allChecked && checkboxes.length > 0;
            }
            
            if (anyChecked) {
                batchActions.classList.remove('d-none');
            } else {
                batchActions.classList.add('d-none');
            }
        });
    });
}

// 批量删除选中的图片
async function batchDelete(selectedItems) {
    const resultList = document.getElementById('searchResultList');
    const loadingDiv = document.createElement('div');
    loadingDiv.className = 'col-12 text-center batch-delete-progress';
    loadingDiv.innerHTML = '<div class="alert alert-info"><div class="spinner-border text-primary" role="status"></div> 正在删除选中图片，请稍候...</div>';
    
    resultList.appendChild(loadingDiv);
    
    let successCount = 0;
    let errorCount = 0;
    
    for (let i = 0; i < selectedItems.length; i++) {
        const contSign = selectedItems[i].getAttribute('data-cont-sign');
        
        try {
            const response = await fetch('/imgsearcherApi/delete', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({
                    cont_sign: contSign
                })
            });
            
            const data = await response.json();
            
            if (data.error) {
                errorCount++;
            } else {
                successCount++;
            }
            
            // 更新进度
            loadingDiv.innerHTML = `
                <div class="alert alert-info">
                    <div class="progress mb-2">
                        <div class="progress-bar" role="progressbar" style="width: ${Math.round((i+1) / selectedItems.length * 100)}%" aria-valuenow="${i+1}" aria-valuemin="0" aria-valuemax="${selectedItems.length}">${Math.round((i+1) / selectedItems.length * 100)}%</div>
                    </div>
                    <p>正在删除: ${i+1}/${selectedItems.length}</p>
                    <p>成功: ${successCount}, 失败: ${errorCount}</p>
                </div>
            `;
            
        } catch (error) {
            errorCount++;
        }
    }
    
    // 删除完成后刷新搜索结果
    alert(`批量删除完成\n成功: ${successCount} 张\n失败: ${errorCount} 张`);
    document.getElementById('searchForm').dispatchEvent(new Event('submit'));
}