//
//  ScanListCell.m
//  HMLG Scan Order
//
//  Created by Rui Zhang on 3/30/22.
//  Copyright © 2022 United Software Applications, Inc. All rights reserved.
//

#import "ScanListCell.h"
#import "RASingleton.h"
#import "OLDataProvider.h"
#import "ActiveViewController.h"
#import "RAConvertor.h"
#import "RAUtils.h"
#import "AppDelegate.h"
#import "RADataProvider.h"

// 表格行高（header 行 + data 行各一行）
static const CGFloat kTableRowHeight   = 24.0;
// 单元格左右内边距
static const CGFloat kCellHPadding     = 20;
// 列最小宽度
static const CGFloat kMinColumnWidth   = 125;

@implementation ScanListCell

- (void)awakeFromNib {
    [super awakeFromNib];

    // priceScrollView
    self.priceScrollView.showsVerticalScrollIndicator   = NO;
    self.priceScrollView.showsHorizontalScrollIndicator = YES;
    self.priceScrollView.alwaysBounceVertical           = NO;
    self.priceScrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;

    // 关闭默认选中高亮，避免与购物车高亮冲突
    self.selectionStyle = UITableViewCellSelectionStyleNone;

    // qtyField 样式
    self.qtyField.text                     = @"1";
    // iPad 上 NumberPad 会浮动，改用 numbersAndPunctuation 让键盘固定在底部
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
        self.qtyField.keyboardType = UIKeyboardTypeNumbersAndPunctuation;
        // cell 内部过滤非数字，不依赖外部 delegate
        [self.qtyField addTarget:self
                          action:@selector(qtyFieldDidChange:)
                forControlEvents:UIControlEventEditingChanged];
    } else {
        self.qtyField.keyboardType = UIKeyboardTypeNumberPad;
    }
    self.qtyField.textAlignment            = NSTextAlignmentCenter;
    self.qtyField.borderStyle              = UITextBorderStyleRoundedRect;
    self.qtyField.font                     = [UIFont systemFontOfSize:15.0];
    self.qtyField.layer.cornerRadius       = 4.0;
    self.qtyField.layer.borderWidth        = 1.0;
    self.qtyField.layer.borderColor        = [UIColor systemGrayColor].CGColor;
    self.qtyField.layer.masksToBounds      = YES;
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];
}

// MARK: - Add to Cart

- (IBAction)onAddToCart:(id)sender {
    // ── 读取用户输入数量，默认 1，不允许 <= 0 ──────────────────────────────
    int userQty = [self.qtyField.text intValue];
    if (userQty <= 0) userQty = 1;

    if (RASingleton.sharedInstance.scan_cart == nil) {
        NSMutableDictionary *cartTemplate = [OLDataProvider loadScanTemplate:@"scan_cart.json"];
        RASingleton.sharedInstance.scan_cart = cartTemplate;
    }

    if (RASingleton.sharedInstance.scan_cart[@"price_type"] == nil) {
        RASingleton.sharedInstance.scan_cart[@"price_type"] = @1;
        RASingleton.sharedInstance.price_type = 1;
    }

    NSMutableDictionary *section = [RASingleton.sharedInstance.scan_cart[@"section_0"] mutableCopy];
    int count = [section[@"count"] intValue];

    NSMutableDictionary *jitem = [self.modelJson mutableCopy];

    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    NSDictionary *price_group = [RADataProvider get_price_group:appDelegate.price_group];

    BOOL newitem = YES;
    for (int i = 0; i < count; i++) {
        NSMutableDictionary *litem = [section[[NSString stringWithFormat:@"item_%i", i]] mutableCopy];
        if ([litem[@"product_id"] isEqualToString:jitem[@"product_id"]]) {
            newitem = NO;
            // 用 userQty 累加
            litem[@"count"]      = @([litem[@"count"] intValue] + userQty);
            litem[@"cuft"]       = @([litem[@"count"] intValue] * [litem[@"unit_cuft"] doubleValue]);
            double discount      = [litem[@"discount"] doubleValue];
            int qty              = [litem[@"count"] intValue];
            double unit_price    = [litem[@"unit_price"] doubleValue];
            litem[@"subtotal_price"] = [NSString stringWithFormat:@"%f", unit_price * qty * (1 - discount / 100.0)];
            section[[NSString stringWithFormat:@"item_%i", i]] = litem;
            break;
        }
    }

    if (newitem) {
        jitem[@"count"]        = @(userQty);   // 使用用户输入数量
        jitem[@"check"]        = @(YES);
        jitem[@"cart_item_id"] = [NSUUID UUID].UUIDString;

        NSString *unit_price_key;
        if (RASingleton.sharedInstance.price_type == 0)
            unit_price_key = price_group[@"price_0"][@"name"];
        else if (_modelJson[@"special_price"])
            unit_price_key = price_group[@"price_2"][@"name"];
        else if (_modelJson[@"net_price"])
            unit_price_key = price_group[@"price_3"][@"name"];
        else
            unit_price_key = price_group[@"price_1"][@"name"];

        NSString *unit_price = _modelJson[unit_price_key];
        if ([unit_price isEqualToString:@"N/A"])
            unit_price = @"0";
        else
            unit_price = [NSString stringWithFormat:@"%.2f", [unit_price doubleValue]];

        jitem[@"unit_price"]     = unit_price;
        jitem[@"erp_unit_price"] = unit_price;

        // surcharge：key = 当前价格列名 + "_surcharge"
        NSString *surcharge_key  = [unit_price_key stringByAppendingString:@"_surcharge"];
        NSString *unit_surcharge = _modelJson[surcharge_key];
//        if (unit_surcharge && unit_surcharge.length > 0 && ![unit_surcharge isEqualToString:@"N/A"])
        if (unit_surcharge )
            jitem[@"unit_surcharge"] = [NSString stringWithFormat:@"%.2f", [unit_surcharge doubleValue]];
        else
            jitem[@"unit_surcharge"] = @"0";

        double discount    = [jitem[@"discount"] doubleValue];
        double dunit_price = [jitem[@"unit_price"] doubleValue];
        jitem[@"subtotal_price"] = [NSString stringWithFormat:@"%f", dunit_price * userQty * (1 - discount / 100.0)];

        section[[NSString stringWithFormat:@"item_%i", count]] = jitem;
        section[@"count"] = @(count + 1);
    }

    RASingleton.sharedInstance.scan_cart[@"section_0"] = section;
    [ActiveViewController Notify:@"CartViewController" Message:RA_NOTIFICATION_RELOAD_DATA];
    [OLDataProvider saveScanCart:RASingleton.sharedInstance.scan_cart];

    // ── 重置数量输入框 ────────────────────────────────────────────────────────
    self.qtyField.text = @"1";

    // ── 刷新当前列表高亮（Search 和 History VC 都会收到）────────────────────
    [[NSNotificationCenter defaultCenter] postNotificationName:@"ScanListShouldRefreshHighlight"
                                                        object:nil];

    [RAUtils message_box:[NSString stringWithFormat:@"%@ added to cart", jitem[@"model"]]
                 message:@"Successfully"
              completion:nil];
}

// MARK: - setModelJson

- (void)setModelJson:(NSMutableDictionary *)modelJson {
    _modelJson = modelJson;

    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    NSDictionary *price_group = [RADataProvider get_price_group:appDelegate.price_group];

#ifdef DEBUG
    NSLog(@"%@", [RAConvertor dict2string:modelJson]);
#endif

    NSString *port = _modelJson[@"port"];
    if (port.length == 0) port = @"N/A";
    NSString *origin = _modelJson[@"origin"];
    if (origin.length == 0) origin = @"N/A";
    NSString *dimension = _modelJson[@"dimension"];
    if (dimension.length == 0) dimension = @"N/A";
    NSString *available = _modelJson[@"available"];
    if (available.length == 0) available = @"N/A";
    NSString *unit_cuft = _modelJson[@"unit_cuft"];
    if (unit_cuft.length == 0) {
        unit_cuft = @"N/A";
    } else {
        unit_cuft = [NSString stringWithFormat:@"%.2f", [_modelJson[@"unit_cuft"] doubleValue]];
    }

    _labelModel.text       = _modelJson[@"model"];
    _labelDescription.text = _modelJson[@"description"];
    _labelDimension.text   = dimension;

    // ── 重置数量输入框（cell 复用时还原为 1）────────────────────────────────
    self.qtyField.text = @"1";

    // ── 价格 flag 处理 ─────────────────────────────────────────────────────
    NSString *price1 = _modelJson[price_group[@"price_1"][@"name"]];
    NSString *price2 = _modelJson[price_group[@"price_2"][@"name"]];
    NSString *price3 = _modelJson[price_group[@"price_3"][@"name"]];

    if (![price1 isEqualToString:@"N/A"] && price1)
        price1 = [NSString stringWithFormat:@"%.2f", [price1 doubleValue]];
    if (![price2 isEqualToString:@"N/A"] && price2)
        price2 = [NSString stringWithFormat:@"%.2f", [price2 doubleValue]];
    if (![price3 isEqualToString:@"N/A"] && price3)
        price3 = [NSString stringWithFormat:@"%.2f", [price3 doubleValue]];

    if (price2 && ![price2 isEqualToString:@"N/A"])
        _modelJson[@"special_price"] = @YES;

    if ((price1 && ![price1 isEqualToString:@"N/A"] && [price1 isEqualToString:price3]) ||
        (price2 && ![price2 isEqualToString:@"N/A"] && [price2 isEqualToString:price3]))
        _modelJson[@"net_price"] = @NO;

    // ── 构建动态表格列 ──────────────────────────────────────────────────────
    NSMutableArray<NSDictionary *> *columns = [NSMutableArray array];
    [columns addObject:@{ @"header": @"CuFT",      @"value": unit_cuft }];
    [columns addObject:@{ @"header": @"Origin",    @"value": origin    }];
    [columns addObject:@{ @"header": @"Port",      @"value": port      }];
    [columns addObject:@{ @"header": @"Available", @"value": available }];

    // 根据 price_count 遍历当前价格组的所有价格列
    int priceCount = [price_group[@"price_count"] intValue];
    for (int i = 0; i < priceCount; i++) {
        NSString *key = [NSString stringWithFormat:@"price_%d", i];
        NSDictionary *pg = price_group[key];
        if (!pg || !pg[@"display"]) continue;
        NSString *displayName  = pg[@"display"];
        NSString *rawValue     = _modelJson[pg[@"name"]];
        NSString *displayValue = @"";
        if (rawValue && ![rawValue isEqualToString:@"N/A"]) {
            double dval = [rawValue doubleValue];
            if (dval > 0)
                displayValue = [RAConvertor currencyNumber:(float)dval];
        }
        // price_2 固定为 Show Special，仅在 special_price 时显示数值
        if (i == 2 && ![_modelJson[@"special_price"] boolValue])
            displayValue = @"";
        [columns addObject:@{ @"header": displayName, @"value": displayValue }];
    }

    [self buildPriceTableWithColumns:columns];

    // ── 购物车高亮 ─────────────────────────────────────────────────────────────
    [self updateCartHighlight];

    // ── 更新 modelJson 供购物车使用 ────────────────────────────────────────
    NSString *cell_price;
    if (RASingleton.sharedInstance.price_type == 1)
        cell_price = _modelJson[price_group[@"price_3"][@"name"]];
    else
        cell_price = _modelJson[price_group[@"price_0"][@"name"]];

    NSString *mpack = _modelJson[@"stockUom"];
    if ([mpack isEqualToString:@"N/A"]) mpack = @"1";
    _modelJson[@"count"]          = _modelJson[@"stockUom"];
    _modelJson[@"cuft"]           = @([mpack intValue] * [unit_cuft doubleValue]);
    _modelJson[@"subtotal_price"] = @([mpack intValue] * [cell_price doubleValue]);
}

// MARK: - 购物车高亮

/**
 检查当前 modelJson 对应的商品是否已在购物车中。
 在购物车中：浅绿背景；不在：恢复默认背景。
 在 setModelJson: 末尾调用，也可在外部主动调用（如加入购物车后刷新列表时）。
 */
- (void)updateCartHighlight {
    NSString *productId = _modelJson[@"product_id"];
    BOOL inCart = NO;

    NSDictionary *section = RASingleton.sharedInstance.scan_cart[@"section_0"];
    if (section && productId.length > 0) {
        int count = [section[@"count"] intValue];
        for (int i = 0; i < count; i++) {
            NSDictionary *item = section[[NSString stringWithFormat:@"item_%i", i]];
            if ([item[@"product_id"] isEqualToString:productId]) {
                inCart = YES;
                break;
            }
        }
    }

    UIColor *highlightColor = inCart
        ? [[UIColor systemGreenColor] colorWithAlphaComponent:0.12]
        : [UIColor systemBackgroundColor];

    self.contentView.backgroundColor = highlightColor;
    self.backgroundColor             = highlightColor;
}

// MARK: - 动态表格构建

- (void)buildPriceTableWithColumns:(NSArray<NSDictionary *> *)columns {
    for (UIView *v in self.priceScrollView.subviews)
        [v removeFromSuperview];

    if (columns.count == 0) {
        self.priceScrollView.contentSize = CGSizeZero;
        return;
    }

    UIFont  *font        = [UIFont systemFontOfSize:15.0];
    UIColor *borderColor = UIColor.labelColor;
    CGFloat  totalWidth  = 0;

    NSMutableArray<NSNumber *> *colWidths = [NSMutableArray arrayWithCapacity:columns.count];
    for (NSDictionary *col in columns) {
        NSString *header = col[@"header"] ?: @"";
        NSString *value  = col[@"value"]  ?: @"";
        NSDictionary *attrs = @{ NSFontAttributeName: font };
        CGFloat hw = [header sizeWithAttributes:attrs].width + kCellHPadding * 2;
        CGFloat vw = [value  sizeWithAttributes:attrs].width + kCellHPadding * 2;
        CGFloat w  = MAX(MAX(hw, vw), kMinColumnWidth);
        [colWidths addObject:@(w)];
    }

    BOOL isLast = NO;
    CGFloat x = 0;
    for (NSUInteger i = 0; i < columns.count; i++) {
        CGFloat w         = [colWidths[i] floatValue];
        NSDictionary *col = columns[i];
        isLast = (i == columns.count - 1);

        // header 行：画上、左（不画下，避免与 data 行上边框叠加）
        UILabel *hLabel = [self makeCellLabel:col[@"header"]
                                         font:font
                                  borderColor:borderColor
                                        frame:CGRectMake(x, 0, w, kTableRowHeight)
                                      drawTop:YES drawBottom:NO isLast:isLast];
        hLabel.backgroundColor = [UIColor secondarySystemBackgroundColor];
        [self.priceScrollView addSubview:hLabel];

        // data 行：画下、左（不画上，避免与 header 行下边框叠加）
        UILabel *vLabel = [self makeCellLabel:col[@"value"]
                                         font:font
                                  borderColor:borderColor
                                        frame:CGRectMake(x, kTableRowHeight, w, kTableRowHeight)
                                      drawTop:NO drawBottom:YES isLast:isLast];
        [self.priceScrollView addSubview:vLabel];

        x += w;
        totalWidth = x;
    }

    self.priceScrollView.contentSize = CGSizeMake(totalWidth, kTableRowHeight * 2);
}

// MARK: - qtyField 数字过滤（iPad 全键盘模式）

- (void)qtyFieldDidChange:(UITextField *)textField {
    NSString *filtered = [[textField.text componentsSeparatedByCharactersInSet:
                           [[NSCharacterSet decimalDigitCharacterSet] invertedSet]]
                          componentsJoinedByString:@""];
    if (![textField.text isEqualToString:filtered])
        textField.text = filtered;
}

// MARK: - 辅助

/**
 用 CAShapeLayer 画边框，避免相邻列边框叠加变粗：
 每列只画上、下、左三边；最后一列额外画右边。
 */
- (UILabel *)makeCellLabel:(NSString *)text
                      font:(UIFont *)font
               borderColor:(UIColor *)borderColor
                     frame:(CGRect)frame
                   drawTop:(BOOL)drawTop
                drawBottom:(BOOL)drawBottom
                    isLast:(BOOL)isLast {
    UILabel *label      = [[UILabel alloc] initWithFrame:frame];
    label.text          = text ?: @"";
    label.font          = font;
    label.textAlignment = NSTextAlignmentCenter;
    label.clipsToBounds = YES;

    CGFloat w  = frame.size.width;
    CGFloat h  = frame.size.height;

    CAShapeLayer *border = [CAShapeLayer layer];
    UIBezierPath *path   = [UIBezierPath bezierPath];

    if (drawTop) {
        [path moveToPoint:CGPointMake(0, 0)];
        [path addLineToPoint:CGPointMake(w, 0)];
    }
    if (drawBottom) {
        [path moveToPoint:CGPointMake(0, h)];
        [path addLineToPoint:CGPointMake(w, h)];
    }
    // 左边（每列都画）
    [path moveToPoint:CGPointMake(0, 0)];
    [path addLineToPoint:CGPointMake(0, h)];
    // 最后一列补右边
    if (isLast) {
        [path moveToPoint:CGPointMake(w, 0)];
        [path addLineToPoint:CGPointMake(w, h)];
    }

    border.path        = path.CGPath;
    border.strokeColor = borderColor.CGColor;
    border.lineWidth   = 1.0;
    border.fillColor   = [UIColor clearColor].CGColor;
    [label.layer addSublayer:border];

    return label;
}

@end