//
//  RQLearningMaterialsViewModel.m
//  SDJK
//
//  Created by 张嵘 on 2022/6/30.
//

#import "RQLearningMaterialsViewModel.h"

@interface RQLearningMaterialsViewModel ()
@end

@implementation RQLearningMaterialsViewModel
- (instancetype)initWithServices:(id<RQViewModelServices>)services params:(NSDictionary *)params{
    if (self = [super initWithServices:services params:params]) {

    }
    return self;
}

- (void)initialize{
    [super initialize];
    self.title = @"资料下载";
    self.style = UITableViewStyleGrouped;
    /// 允许下拉刷新
    self.shouldPullDownToRefresh = YES;
    ///配置数据
    [self rq_configureData];
}


#pragma mark - PrivateMethod
- (void)rq_configureData {
    @weakify(self);
    /// 列表
    RAC(self, items) = self.requestRemoteDataCommand.executionSignals.switchToLatest;
    /// 数据源
    RAC(self, dataSource) = [RACObserve(self, items) map:^(NSArray * items) {
        @strongify(self)
        return [self dataSourceWithItems:items];
    }];
    
    /// 选中cell 跳转的命令
//    self.didSelectCommand = [[RACCommand alloc] initWithSignalBlock:^RACSignal *(NSIndexPath * indexPath) {
//        return [RACSignal empty];
//    }];
    
}

/// 请求数据
- (RACSignal *)requestRemoteDataSignalWithPage:(NSUInteger)page {
    NSArray * (^itemsBlock)(NSArray *) = ^(NSArray *products) {
        if (page == 1 || page == 0) {
            /// 下拉刷新
        } else {
            /// 上拉加载
            products = @[(self.items ?: @[]).rac_sequence, products.rac_sequence].rac_sequence.flatten.array;
        }
        return products;
    };
    ///
    return [[[RQ_HTTP_Service getLearningMaterialsList] map:itemsBlock] doError:^(NSError * _Nonnull error) {
        [MBProgressHUD rq_showErrorTips:error];
    }];
}

#pragma mark - 辅助方法
- (NSArray *)dataSourceWithItems:(NSArray *)items {
    NSArray *viewModels = [items.rac_sequence map:^(RQLearningMaterialsModel *learningMaterialsModel) {
        RQCommonGroupViewModel *group = [RQCommonGroupViewModel groupViewModel];
        RQLearningMaterialsItemViewModel *learningMaterialsItemViewModel = [[RQLearningMaterialsItemViewModel alloc] initWithLearningMaterialsModel:learningMaterialsModel allModelArr:items];
        group.itemViewModels = @[learningMaterialsItemViewModel];
        return group;
    }].array;
    
    return viewModels ?: @[];
}
@end