/**
 * NewSearchproduct.js - Enhanced product search functionality
 * 
 * This script handles the product search and specification management
 * for the country price management interface.
 */

// Make sure jQuery is available before initializing
(function($) {
    // Run when document is ready
    $(document).ready(function() {
        // Initialize the product specification search functionality
        initProductSearch();
        
        // Ensure search input is enabled on page load
        $('#specificationSearch').prop('disabled', false);
        
        // Add form validation for price fields
        $('form[name="form1"]').on('submit', function(e) {
            var hasError = false;
            var firstErrorField = null;
            
            // Check country name and area code fields
            var $countryName = $('#countryName');
            var $countryCode = $('#countryCode');
            
            // Validate country name
            if ($countryName.val().trim() === '') {
                hasError = true;
                $countryName.css('border-color', 'red');
                
                if (!firstErrorField) {
                    firstErrorField = $countryName;
                }
                
                // Show inline error
                if ($countryName.next('.field-error').length === 0) {
                    $countryName.after('<div class="field-error" style="color:red;font-size:12px;margin-top:5px;">国家名称不能为空</div>');
                }
            } else {
                $countryName.css('border-color', '');
                $countryName.next('.field-error').remove();
            }
            
            // Validate area code
            if ($countryCode.val().trim() === '') {
                hasError = true;
                $countryCode.css('border-color', 'red');
                
                if (!firstErrorField) {
                    firstErrorField = $countryCode;
                }
                
                // Show inline error
                if ($countryCode.next('.field-error').length === 0) {
                    $countryCode.after('<div class="field-error" style="color:red;font-size:12px;margin-top:5px;">区号不能为空</div>');
                }
            } else {
                $countryCode.css('border-color', '');
                $countryCode.next('.field-error').remove();
            }
            
            // Check all price fields
            $('input[name="spec_price[]"]').each(function() {
                var price = $(this).val().trim();
                if (price === '' || price === '0' || parseFloat(price) <= 0) {
                    hasError = true;
                    $(this).css('border-color', 'red');
                    
                    // Store reference to first error field for scrolling
                    if (!firstErrorField) {
                        firstErrorField = $(this);
                    }
                    
                    // Find product and spec name for error message
                    var $specItem = $(this).closest('.specitem');
                    var productName = $specItem.prevAll('.product-header').first().text().trim();
                    var specName = $specItem.find('.spec-name').text().trim();
                    
                    // Show inline error under the field
                    var $errorMsg = $('<div class="price-error" style="color:red;font-size:12px;margin-top:5px;">售价不能为0或空白</div>');
                    $specItem.find('.price-error').remove();
                    $(this).after($errorMsg);
                } else {
                    $(this).css('border-color', '');
                    $(this).next('.price-error').remove();
                }
            });
            
            if (hasError) {
                e.preventDefault();
                
                // Create appropriate error message
                var errorMessage = '错误：';
                if ($countryName.val().trim() === '' || $countryCode.val().trim() === '') {
                    errorMessage += '国家名称和区号不能为空！';
                }
                
                // Check if there are price errors
                var hasPriceErrors = false;
                $('input[name="spec_price[]"]').each(function() {
                    var price = $(this).val().trim();
                    if (price === '' || price === '0' || parseFloat(price) <= 0) {
                        hasPriceErrors = true;
                        return false; // Break the loop
                    }
                });
                
                if (hasPriceErrors) {
                    if (errorMessage !== '错误：') {
                        errorMessage += '\n\n';
                    }
                    errorMessage += '部分产品规格的售价为0或空白，请检查并填写所有售价！';
                }
                
                alert(errorMessage);
                
                // Scroll to first error field
                if (firstErrorField) {
                    $('html, body').animate({
                        scrollTop: firstErrorField.offset().top - 100
                    }, 500);
                }
                return false;
            }
            
            return true;
        });
    });

    /**
     * Initialize the product search functionality
     */
    function initProductSearch() {
        var $searchInput = $('#specificationSearch');
        var $resultsList = $('#specificationlist');
        var searchTimeout;

        // Product search input keyup event with debounce
        $searchInput.on('keyup', function() {
            var keyword = $(this).val().trim();
            
            // Clear previous timeout to implement debounce
            clearTimeout(searchTimeout);
            
            // Hide results and return if search term is too short
            if (keyword.length < 2) {
                $resultsList.find('ul').empty();
                $resultsList.hide();
                return;
            }
            
            // Set a timeout to prevent too many requests
            searchTimeout = setTimeout(function() {
                // Show loading indicator
                $resultsList.find('ul').html('<li class="search-loading">正在搜索产品...</li>');
                $resultsList.show();
                
                // Make AJAX request to search products
                $.ajax({
                    url: 'ajax_search_products_for_spec.php',
                    type: 'POST',
                    data: {keyword: keyword},
                    dataType: 'html',
                    success: function(data) {
                        // Check for session errors in the response
                        if (data.indexOf('session') !== -1 && data.indexOf('Notice') !== -1) {
                            console.warn("Session notice detected in response. This may be harmless.");
                        }
                        
                        $resultsList.find('ul').html(data);
                        
                        // Show or hide results based on content
                        if ($resultsList.find('ul li').length > 0) {
                            $resultsList.show();
                        } else {
                            $resultsList.hide();
                        }
                    },
                    error: function(xhr, status, error) {
                        console.error("Search error:", error);
                        $resultsList.find('ul').html('<li class="search-error">搜索失败，请重试</li>');
                    }
                });
            }, 300); // 300ms debounce
        });

        // Show search results when input is focused (if results exist and search term is valid)
        $searchInput.on('focus', function() {
            var keyword = $(this).val().trim();
            if (keyword.length >= 2 && $resultsList.find('ul li').length > 0) {
                $resultsList.show();
            }
        });

        // Handle product selection from search results
        $(document).on('click', '#specificationlist ul li', function() {
            if ($(this).hasClass('search-loading') || $(this).hasClass('search-error')) {
                return; // Don't process clicks on loading or error messages
            }
            
            var $this = $(this);
            var productId = $this.data('product-id');
            
            // Skip if no product ID was found
            if (!productId) {
                console.error("No product ID found");
                return;
            }
            
            var productName = $this.data('product-name');
            var categoryName = $this.data('category-name');
            var productUnit = $this.data('unit');
            
            // Check if product is already added
            if ($('.specifications .product-header:contains("' + productName + '")').length > 0) {
                alert('该产品已添加！');
                return;
            }
            
            // Hide results and show loading state
            $resultsList.hide();
            $searchInput.val('正在加载产品规格...').prop('disabled', true);
            
            // Fetch product specifications
            $.ajax({
                url: 'ajax_get_product_specifications.php',
                type: 'POST',
                data: {product_id: productId},
                dataType: 'html',
                success: function(data) {
                    // Check for session errors in the response
                    if (data.indexOf('session') !== -1 && data.indexOf('Notice') !== -1) {
                        console.warn("Session notice detected in response. This may be harmless.");
                        // Try to extract the actual content after the notice
                        data = data.substring(data.indexOf('</p>') + 4);
                    }
                    
                    // Check if we received an error message about no specifications
                    if (data.indexOf('没有规格信息') !== -1) {
                        alert('该产品没有规格信息，请先在产品管理中添加规格');
                        $searchInput.val('').prop('disabled', false);
                        return;
                    }
                    
                    // Create product header
                    var categoryDisplay = categoryName ? ' <span class="category-tag">(' + categoryName + ')</span>' : '';
                    var productHeader = $('<div class="product-header">' + productName + categoryDisplay + '</div>');
                    
                    // Append product header and specifications
                    $('.specifications').append(productHeader);
                    $('.specifications').append(data);
                    
                    // Make sure price fields are empty and don't have placeholders
                    var $lastHeader = $('.specifications .product-header:last');
                    $lastHeader.nextUntil('.product-header', '.specitem').find('input[name="spec_price[]"]').attr('placeholder', '').val('');
                    
                    // Reset search input
                    $searchInput.val('').prop('disabled', false);
                },
                error: function(xhr, status, error) {
                    console.error("Error loading specifications:", error);
                    alert('加载产品规格失败，请重试');
                    $searchInput.val('').prop('disabled', false);
                },
                complete: function() {
                    // Always make sure search input is re-enabled
                    setTimeout(function() {
                        $searchInput.prop('disabled', false);
                    }, 500);
                }
            });
        });

        // Delete specification when delete button is clicked
        $(document).on('click', '.specdelete', function() {
            // if (!confirm('确定要删除此规格吗？')) {
            //     return;
            // }
            
            var $specItem = $(this).closest('.specitem');
            var $productHeader = $specItem.prevAll('.product-header').first();
            
            // Remove specification item
            $specItem.fadeOut(200, function() {
                $(this).remove();
                
                // Check if there are any specifications left for this product
                var hasSpecs = false;
                $productHeader.nextUntil('.product-header', '.specitem').each(function() {
                    hasSpecs = true;
                    return false; // Break the loop
                });
                
                // If no specifications left, remove product header
                if (!hasSpecs) {
                    $productHeader.fadeOut(200, function() {
                        $(this).remove();
                    });
                }
            });
        });

        // Hide search results when clicking outside
        $(document).on('click', function(e) {
            if (!$(e.target).closest('#specificationSearch, #specificationlist').length) {
                $resultsList.hide();
            }
        });
    }
})(jQuery);