//
//  KBPaySvipVC.m
//  keyBoard
//
//  Created by Mac on 2026/2/3.
//

#import "KBPaySvipVC.h"
#import "KBSvipSubscribeCell.h"
#import "KBSvipBenefitCell.h"
#import "KBSvipFlowLayout.h"
#import "PayVM.h"
#import "KBPayProductModel.h"
#import "KBBizCode.h"
#import "keyBoard-Swift.h"
#import <MJExtension/MJExtension.h>

static NSString * const kKBSvipSubscribeCellId = @"kKBSvipSubscribeCellId";
static NSString * const kKBSvipBenefitCellId = @"kKBSvipBenefitCellId";
static NSString * const kKBSvipBenefitHeaderId = @"kKBSvipBenefitHeaderId";

@interface KBPaySvipVC () <UICollectionViewDataSource, UICollectionViewDelegateFlowLayout>
@property (nonatomic, copy) void(^scrollCallback)(UIScrollView *scrollView);

/// 1：UI 控件
@property (nonatomic, strong) UICollectionView *collectionView;
@property (nonatomic, strong) UIButton *payButton;
@property (nonatomic, strong) UILabel *agreementLabel;
@property (nonatomic, strong) UIButton *agreementButton;

/// 2：数据
@property (nonatomic, strong) NSArray<KBPayProductModel *> *plans;
@property (nonatomic, assign) NSInteger selectedIndex;
@property (nonatomic, strong) NSArray<NSDictionary *> *benefits;
@property (nonatomic, strong) PayVM *payVM;
@end

@implementation KBPaySvipVC

#pragma mark - Life Cycle

- (void)viewDidLoad {
    [super viewDidLoad];
    
    /// 1：控件初始化
    [self setupUI];
    /// 2：数据初始化
    [self setupData];
    /// 3：加载数据
    [self loadData];
}

#pragma mark - 1：控件初始化

- (void)setupUI {
    self.view.backgroundColor = [UIColor colorWithHex:0xF6F7FB];
    
    [self.view addSubview:self.payButton];
    [self.view addSubview:self.agreementLabel];
    [self.view addSubview:self.agreementButton];
    [self.view addSubview:self.collectionView];
    
    [self.agreementButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerX.equalTo(self.view);
        make.bottom.equalTo(self.view).offset(-KB_SAFE_BOTTOM - 15);
    }];
    
    [self.agreementLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerX.equalTo(self.view);
        make.bottom.equalTo(self.agreementButton.mas_top).offset(0);
    }];
    
    [self.payButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.view).offset(24);
        make.right.equalTo(self.view).offset(-24);
        make.bottom.equalTo(self.agreementLabel.mas_top).offset(-14);
        make.height.mas_equalTo(58);
    }];
    
    [self.collectionView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.right.top.equalTo(self.view);
        make.bottom.equalTo(self.payButton.mas_top).offset(-16);
    }];
}

#pragma mark - 2：数据初始化

- (void)setupData {
    self.payVM = [PayVM new];
    self.plans = @[];
    self.selectedIndex = NSNotFound;
    
    // 权益列表数据（使用现有图标资源）
    self.benefits = @[
        @{@"icon": @"pay_ai_icon", @"title": KBLocalized(@"Wireless Sub-ai Dialogue")},
        @{@"icon": @"pay_keyboard_icon", @"title": KBLocalized(@"Personalized Keyboard")},
        @{@"icon": @"pay_chat_icon", @"title": KBLocalized(@"Chat Persona")},
        @{@"icon": @"pay_emotion_icon", @"title": KBLocalized(@"Emotional Counseling")},
        @{@"icon": @"pay_chat_icon", @"title": KBLocalized(@"Longer Chat History")},
        @{@"icon": @"pay_chat_icon", @"title": KBLocalized(@"Unlimited Chatting")},
        @{@"icon": @"pay_ai_icon", @"title": KBLocalized(@"Chat Without Speed Limits")},
        @{@"icon": @"pay_vip_icon", @"title": KBLocalized(@"Coming Soon")},
    ];
}

#pragma mark - 3：加载数据

- (void)loadData {
    __weak typeof(self) weakSelf = self;
    [self.payVM fetchSubscriptionProductsNeedShow:YES completion:^(NSInteger sta, NSString * _Nullable msg, NSArray<KBPayProductModel *> * _Nullable products) {
        dispatch_async(dispatch_get_main_queue(), ^{
            __strong typeof(weakSelf) self = weakSelf;
            if (!self) { return; }
            if (sta != KBBizCodeSuccess || ![products isKindOfClass:NSArray.class]) {
                self.plans = @[];
                self.selectedIndex = NSNotFound;
                [self.collectionView reloadData];
                return;
            }
            self.plans = products ?: @[];
            self.selectedIndex = self.plans.count > 0 ? 1 : NSNotFound; // 默认选中第二个（1 Month）
            [self.collectionView reloadData];
            [self selectCurrentPlanAnimated:NO];
            [self prepareStoreKitWithPlans:self.plans];
        });
    }];
}

#pragma mark - Private Methods

- (void)prepareStoreKitWithPlans:(NSArray<KBPayProductModel *> *)plans {
    if (![plans isKindOfClass:NSArray.class] || plans.count == 0) { return; }
    NSMutableArray<NSString *> *ids = [NSMutableArray array];
    for (KBPayProductModel *plan in plans) {
        if (![plan isKindOfClass:KBPayProductModel.class]) { continue; }
        if (plan.productId.length) {
            [ids addObject:plan.productId];
        }
    }
    if (ids.count == 0) { return; }
    [[KBStoreKitBridge shared] prepareWithProductIds:ids completion:nil];
}

- (void)selectCurrentPlanAnimated:(BOOL)animated {
    if (self.selectedIndex == NSNotFound) { return; }
    if (self.selectedIndex < 0 || self.selectedIndex >= self.plans.count) { return; }
    NSIndexPath *ip = [NSIndexPath indexPathForItem:self.selectedIndex inSection:0];
    [self.collectionView selectItemAtIndexPath:ip animated:animated scrollPosition:UICollectionViewScrollPositionNone];
    KBSvipSubscribeCell *cell = (KBSvipSubscribeCell *)[self.collectionView cellForItemAtIndexPath:ip];
    if ([cell isKindOfClass:KBSvipSubscribeCell.class]) {
        [cell applySelected:YES animated:animated];
    }
}

- (KBPayProductModel *)currentSelectedPlan {
    if (self.selectedIndex == NSNotFound) { return nil; }
    if (self.selectedIndex < 0 || self.selectedIndex >= self.plans.count) { return nil; }
    return self.plans[self.selectedIndex];
}

- (NSString *)displayTitleForPlan:(KBPayProductModel *)plan {
    if (!plan) { return @""; }
    if (plan.productDescription.length) { return plan.productDescription; }
    NSString *name = plan.name ?: @"";
    NSString *unit = plan.unit ?: @"";
    if (name.length && unit.length) { return [NSString stringWithFormat:@"%@ %@", name, unit]; }
    if (name.length) { return name; }
    if (unit.length) { return unit; }
    return KBLocalized(@"Subscription");
}

#pragma mark - Actions

- (void)onTapPayButton {
    KBPayProductModel *plan = [self currentSelectedPlan];
    if (!plan) {
        [KBHUD showInfo:KBLocalized(@"Please select a product")];
        return;
    }
    
    NSMutableDictionary *extra = [NSMutableDictionary dictionary];
    if ([plan.productId isKindOfClass:NSString.class] && plan.productId.length > 0) {
        extra[@"product_id"] = plan.productId;
    }
    [[KBMaiPointReporter sharedReporter] reportClickWithEventName:@"click_svip_pay_btn"
                                                          pageId:@"svip_pay"
                                                       elementId:@"pay_btn"
                                                           extra:extra.copy
                                                      completion:nil];
    
    NSString *productId = plan.productId;
    if (productId.length == 0) {
        [KBHUD showInfo:KBLocalized(@"Product unavailable")];
        return;
    }
    
    [KBHUD show];
    __weak typeof(self) weakSelf = self;
    [[KBStoreKitBridge shared] purchaseWithProductId:productId completion:^(BOOL success, NSString * _Nullable message) {
        __strong typeof(weakSelf) self = weakSelf;
        [KBHUD dismiss];
        [KBHUD showInfo:KBLocalized(message)];
        if (!self || !success) { return; }
        [self selectCurrentPlanAnimated:NO];
    }];
}

- (void)agreementButtonAction {
    [KBHUD showInfo:KBLocalized(@"Open agreement")];
}

#pragma mark - UICollectionView DataSource

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
    // Section 0: 订阅选项（横向）
    // Section 1: 权益列表
    return 2;
}

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    if (section == 0) {
        return self.plans.count;
    }
    return self.benefits.count;
}

- (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.section == 0) {
        KBSvipSubscribeCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:kKBSvipSubscribeCellId forIndexPath:indexPath];
        if (indexPath.item < self.plans.count) {
            KBPayProductModel *plan = self.plans[indexPath.item];
            NSString *title = [self displayTitleForPlan:plan];
            NSString *price = [plan priceDisplayText];
            [cell configTitle:title price:price strike:nil];
            [cell applySelected:(indexPath.item == self.selectedIndex) animated:NO];
        }
        return cell;
    } else {
        KBSvipBenefitCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:kKBSvipBenefitCellId forIndexPath:indexPath];
        if (indexPath.item < self.benefits.count) {
            NSDictionary *benefit = self.benefits[indexPath.item];
            [cell configWithIcon:benefit[@"icon"] title:benefit[@"title"]];
        }
        return cell;
    }
}

- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.section == 1 && [kind isEqualToString:UICollectionElementKindSectionHeader]) {
        UICollectionReusableView *header = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:kKBSvipBenefitHeaderId forIndexPath:indexPath];
        // 清除旧的子视图
        for (UIView *subview in header.subviews) {
            [subview removeFromSuperview];
        }
        // 添加标题
        UILabel *titleLabel = [UILabel new];
        titleLabel.text = KBLocalized(@"Membership Benefits");
        titleLabel.textColor = [UIColor colorWithHex:0x999999];
        titleLabel.font = [KBFont medium:13];
        titleLabel.textAlignment = NSTextAlignmentCenter;
        [header addSubview:titleLabel];
        [titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
            make.center.equalTo(header);
        }];
        // 左右横线
        UIView *leftLine = [UIView new];
        leftLine.backgroundColor = [UIColor colorWithHex:0xE5E5E5];
        [header addSubview:leftLine];
        [leftLine mas_makeConstraints:^(MASConstraintMaker *make) {
            make.right.equalTo(titleLabel.mas_left).offset(-12);
            make.centerY.equalTo(header);
            make.width.mas_equalTo(40);
            make.height.mas_equalTo(1);
        }];
        UIView *rightLine = [UIView new];
        rightLine.backgroundColor = [UIColor colorWithHex:0xE5E5E5];
        [header addSubview:rightLine];
        [rightLine mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(titleLabel.mas_right).offset(12);
            make.centerY.equalTo(header);
            make.width.mas_equalTo(40);
            make.height.mas_equalTo(1);
        }];
        return header;
    }
    return [UICollectionReusableView new];
}

#pragma mark - UICollectionView Delegate

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.section != 0 || indexPath.item >= self.plans.count) { return; }
    if (self.selectedIndex == indexPath.item) { return; }
    
    NSInteger old = self.selectedIndex;
    self.selectedIndex = indexPath.item;
    
    KBPayProductModel *plan = self.plans[indexPath.item];
    NSMutableDictionary *extra = [NSMutableDictionary dictionary];
    extra[@"index"] = @(indexPath.item);
    if ([plan.productId isKindOfClass:NSString.class] && plan.productId.length > 0) {
        extra[@"product_id"] = plan.productId;
    }
    [[KBMaiPointReporter sharedReporter] reportClickWithEventName:@"click_svip_select_plan"
                                                          pageId:@"svip_pay"
                                                       elementId:@"plan_item"
                                                           extra:extra.copy
                                                      completion:nil];
    
    KBSvipSubscribeCell *newCell = (KBSvipSubscribeCell *)[collectionView cellForItemAtIndexPath:indexPath];
    [newCell applySelected:YES animated:YES];
    
    if (old >= 0 && old < self.plans.count) {
        NSIndexPath *oldIP = [NSIndexPath indexPathForItem:old inSection:0];
        KBSvipSubscribeCell *oldCell = (KBSvipSubscribeCell *)[collectionView cellForItemAtIndexPath:oldIP];
        [oldCell applySelected:NO animated:YES];
    }
}

- (void)collectionView:(UICollectionView *)collectionView willDisplayCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.section == 0 && indexPath.item < self.plans.count && [cell isKindOfClass:KBSvipSubscribeCell.class]) {
        BOOL sel = (indexPath.item == self.selectedIndex);
        KBSvipSubscribeCell *c = (KBSvipSubscribeCell *)cell;
        if (sel) {
            [collectionView selectItemAtIndexPath:indexPath animated:NO scrollPosition:UICollectionViewScrollPositionNone];
        }
        [c applySelected:sel animated:NO];
    }
}

#pragma mark - FlowLayout

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
    CGFloat screenW = KB_SCREEN_WIDTH;
    if (indexPath.section == 0) {
        // 订阅选项：横向三等分
        CGFloat itemW = (screenW - 32 - 20) / 3.0; // 左右各16，间距10*2
        return CGSizeMake(itemW, 90);
    } else {
        // 权益项
        return CGSizeMake(screenW - 32, 56);
    }
}

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section {
    if (section == 1) {
        return CGSizeMake(KB_SCREEN_WIDTH, 50);
    }
    return CGSizeZero;
}

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section {
    if (section == 0) { return 10; }
    return 0;
}

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section {
    if (section == 0) { return 10; }
    return 0;
}

- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
    if (section == 0) {
        return UIEdgeInsetsMake(16, 16, 10, 16);
    }
    return UIEdgeInsetsMake(0, 16, 20, 16);
}

#pragma mark - UIScrollView Delegate（转发给分页容器）

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    !self.scrollCallback ?: self.scrollCallback(scrollView);
}

#pragma mark - JXPagingViewListViewDelegate

- (UIView *)listView { return self.view; }
- (UIScrollView *)listScrollView { return self.collectionView; }
- (void)listViewDidScrollCallback:(void (^)(UIScrollView *))callback { self.scrollCallback = callback; }
- (void)listWillAppear { NSLog(@"%@:%@", self.title, NSStringFromSelector(_cmd)); }
- (void)listDidAppear { NSLog(@"%@:%@", self.title, NSStringFromSelector(_cmd)); }
- (void)listWillDisappear { NSLog(@"%@:%@", self.title, NSStringFromSelector(_cmd)); }
- (void)listDidDisappear { NSLog(@"%@:%@", self.title, NSStringFromSelector(_cmd)); }

#pragma mark - Lazy

- (UICollectionView *)collectionView {
    if (!_collectionView) {
        KBSvipFlowLayout *layout = [KBSvipFlowLayout new];
        layout.scrollDirection = UICollectionViewScrollDirectionVertical;
        layout.decorationSection = 1; // Section 1 添加背景
        _collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:layout];
        _collectionView.backgroundColor = [UIColor clearColor];
        _collectionView.dataSource = self;
        _collectionView.delegate = self;
        _collectionView.alwaysBounceVertical = YES;
        _collectionView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
        [_collectionView registerClass:KBSvipSubscribeCell.class forCellWithReuseIdentifier:kKBSvipSubscribeCellId];
        [_collectionView registerClass:KBSvipBenefitCell.class forCellWithReuseIdentifier:kKBSvipBenefitCellId];
        [_collectionView registerClass:UICollectionReusableView.class forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:kKBSvipBenefitHeaderId];
    }
    return _collectionView;
}

- (UIButton *)payButton {
    if (!_payButton) {
        _payButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [_payButton setTitle:KBLocalized(@"Recharge Now") forState:UIControlStateNormal];
        [_payButton setTitleColor:[UIColor colorWithHex:KBBlackValue] forState:UIControlStateNormal];
        _payButton.titleLabel.font = [KBFont medium:15];
        _payButton.layer.cornerRadius = 29;
        _payButton.clipsToBounds = YES;
        _payButton.backgroundColor = [UIColor colorWithHex:0x222222];
        [_payButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        [_payButton addTarget:self action:@selector(onTapPayButton) forControlEvents:UIControlEventTouchUpInside];
    }
    return _payButton;
}

- (UILabel *)agreementLabel {
    if (!_agreementLabel) {
        _agreementLabel = [UILabel new];
        _agreementLabel.text = KBLocalized(@"By Clicking \"pay\", You Indicate Your Agreement To The");
        _agreementLabel.font = [KBFont regular:12];
        _agreementLabel.textColor = [UIColor colorWithHex:KBBlackValue];
    }
    return _agreementLabel;
}

- (UIButton *)agreementButton {
    if (!_agreementButton) {
        _agreementButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [_agreementButton setTitle:KBLocalized(@"《Embership Agreement》") forState:UIControlStateNormal];
        [_agreementButton setTitleColor:[UIColor colorWithHex:KBColorValue] forState:UIControlStateNormal];
        _agreementButton.titleLabel.font = [KBFont regular:12];
        [_agreementButton addTarget:self action:@selector(agreementButtonAction) forControlEvents:UIControlEventTouchUpInside];
    }
    return _agreementButton;
}

@end