//
//  ThingsViewController.m
//  kneet
//
//  Created by Jason Lee on 3/10/15.
//  Copyright (c) 2015 ntels. All rights reserved.
//
#import "JDObject.h"

#import "RequestHandler.h"
#import "JDJSONModel.h"
#import "DeviceModel.h"

#import "UIImageView+WebCache.h"
#import "CustomLabel.h"
#import "CustomImageView.h"
#import "CustomTextField.h"
#import "CustomButton.h"
#import "JYRefreshController.h"
#import "WYPopoverController.h"
#import "ImageUtil.h"

#import "CommandClassControlView.h"
#import "ThingsDetailViewController.h"

#import "ThingsViewController.h"
#import "UIButton+WebCache.h"
#import "ThingsAddViewController.h"
#import "ThingsAddStartViewController.h"
#import "CustomTableView.h"

#define kfThingsTableViewCellHeight 100.0f

@interface ThingsCollectionViewCell () {
    NSInteger _commandStatusElapsedTime;
}

@property (weak, nonatomic) NSIndexPath *indexPath;

@end

@implementation ThingsCollectionViewCell

- (void)awakeFromNib {
    _btnDelete.hidden = YES;
    
}
@end

@implementation ThingsAddCollectionViewCell

@end

@implementation ThingsCollectionFooterView

@end

@interface ThingsViewController () <UICollectionViewDataSource, UICollectionViewDelegate> {
    NSMutableArray<DeviceModel> *_deviceList;
    NSString *_pagingId, *_pagingType;
    BOOL _isNotFirstLoading, _isDeleteMode;
    
    NSMutableArray<DeviceModel> *_commandArray;
    NSTimer *_deviceCommandsBackgroundTimer;
}

@property (strong, nonatomic) JYPullToRefreshController *refreshController;
@property (strong, nonatomic) JYPullToLoadMoreController *loadMoreController;

@end


#pragma mark - Class Definition

@implementation ThingsViewController


- (void)viewDidLoad {
    [super viewDidLoad];

    [self initUI];
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    [self prepareViewDidLoad];
}

- (void)initUI {
    
    //set tableview option
    _collectionView.delegate = self;
    _collectionView.dataSource = self;
    _collectionView.backgroundColor = kUIBgColor01;
    
    if ([JDFacade facade].loginUser.homehubDeviceId && ![[JDFacade facade].loginUser.homehubDeviceId isEmptyString]) {
        [self setThingsPopoverOptions];
    }
    
    //set refresh controls
//    __weak typeof(self) weakSelf = self;
//    self.refreshController = [[JYPullToRefreshController alloc] initWithScrollView:self.tableView];
//    self.refreshController.pullToRefreshHandleAction = ^{
//        [weakSelf requestPredefinedRulesRecently];
//    };
//    
//    self.loadMoreController = [[JYPullToLoadMoreController alloc] initWithScrollView:self.tableView];
//    self.loadMoreController.pullToLoadMoreHandleAction = ^{
//        [weakSelf requestPredefinedRulesOlder];
//    };
}

- (void)setThingsPopoverOptions {
    
    //set Popover Contents
    __weak typeof(self) weakSelf = self;
    _popooverOptionArray = [[NSMutableArray alloc] init];

    [_popooverOptionArray addObject:@{@"menuName" : NSLocalizedString(@"새로 고침",nil),
                                      @"iconName": @"tp_01_img_bg_morepopup_icon_refresh",
                                      @"target": weakSelf,
                                      @"selector": [NSValue valueWithPointer:@selector(refreshDeviceList)]}];

    if ([JDFacade facade].loginUser.level == 90) {//권한
        [_popooverOptionArray addObject:@{@"menuName" : NSLocalizedString(@"추가", @"추가"),
                                          @"iconName": @"tp_01_img_bg_morepopup_icon_group_deviceadd",
                                          @"target": weakSelf,
                                          @"selector": [NSValue valueWithPointer:@selector(addNewDevice)]}];
        
        [_popooverOptionArray addObject:@{@"menuName" : NSLocalizedString(@"삭제", @"삭제"),
                                          @"iconName": @"tp_01_img_bg_morepopup_icon_group_deviceadd",
                                          @"target": weakSelf,
                                          @"selector": [NSValue valueWithPointer:@selector(toggleEditMode)]}];
    }
}


- (void)prepareViewDidLoad {
    //fetch devices from server
    
    if (![JDFacade facade].loginUser.homehubDeviceId || [[JDFacade facade].loginUser.homehubDeviceId isEmptyString]) {
        [_mainView bringSubviewToFront:_addHubContainerView];
        _collectionView.hidden = YES;
        
    } else {
        
        [_mainView bringSubviewToFront:_collectionView];
        _addHubContainerView.hidden = YES;
        _collectionView.hidden = NO;
        
        [self performSelector:@selector(requestDeviceList) withObject:nil afterDelay:0.0f];
    }
}

- (void)updateHomeHubStatusToDevices {
    for (DeviceModel *device in _deviceList) {
        device.onlineState = [JDFacade facade].loginUser.homehubOnlineState;
    }
    
    [_collectionView reloadData];
}

- (void)updateDevice:(DeviceModel *)device {
//    if ([device.deviceId isEqualToString:ldevice.deviceId]) {
//        ldevice.cmdclsValue = device.cmdclsValue;
//        ldevice.contentValue = device.contentValue;
//        break;
//    }
}

//장치상태를 조회함.
- (void)requestPollingCommandStatusOfDeviceInBackground:(DeviceModel *)device {
    if (!_commandArray) {
        _commandArray = (NSMutableArray<DeviceModel> *)[[NSMutableArray alloc] init];
    }
    
    __block BOOL isStatusChanged = NO;
    if (device && [device isKindOfClass:[DeviceModel class]]) {//validate, aleady have,
        if (![_commandArray objectByUsingPredicateFormat:@"deviceId == %@ && nodeId == %@", device.deviceId, device.nodeId]) {//일치하는 디바이스가 있을 경우, 추가하지 않음.
            [_commandArray addObject:device];
            
            isStatusChanged = YES;
        }
    }
    
    //TODO : 추가 커맨드를 받을 것인가?
    if (_commandArray.count) {
        
        NSMutableString *pathParams = [[NSMutableString alloc] init];
        for (DeviceModel *pDevice in _commandArray) {
            NSString *prefix = [pathParams isEmptyString] ? ksEmptyString : @",";
            [pathParams appendFormat:@"%@%@_%@", prefix, pDevice.deviceId, pDevice.nodeId];
        }
        
        //20
        NSString *path = [NSString stringWithFormat:API_GET_DEVICE_NODE_STATUS, pathParams];
        
        dispatch_sync(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{//RUN to background thread
            DeviceListModel *fdevices = [[RequestHandler handler] sendSyncGetRequestAPIPath:path parameters:nil
                                                                            modelClass:[DeviceListModel class] showLoadingView:YES];
            
            if (fdevices && fdevices.list && fdevices.list.count) {
                
                [_commandArray enumerateObjectsUsingBlock:^(DeviceModel *rdevice, NSUInteger idx, BOOL * _Nonnull stop) {
                    
                    DeviceModel *matchedDevice = (DeviceModel *)[fdevices.list objectByUsingPredicateFormat:@"deviceId == %@ && nodeId == %@", rdevice.deviceId, rdevice.nodeId];
                    
                    //실행 여부 및 10초 경과 확인
                    BOOL isOverTimeLimit = [self elapsedSecondsFromNow:rdevice] > 10;
                    
                    //실행 여부 확인
                    NSInteger elapsedTime = [self elapsedSecondsFrom:rdevice to:matchedDevice];
                    BOOL hasChangedStatus = elapsedTime > 0;
                    
                    rdevice.isRequesting = [rdevice.contentValue isEqualToString:matchedDevice.contentValue] && !hasChangedStatus && !isOverTimeLimit;
                    
                    //TODO - home hub check
//                    rdevice.requestTime = matchedDevice.requestTime;
//                    rdevice.collectTime = matchedDevice.collectTime;
                    rdevice.onlineState = matchedDevice.onlineState;
                    
                    if (!rdevice.isRequesting || !rdevice.isOnline || ![JDFacade facade].loginUser.isHomehubOnline) {//정상적으로 변경됨.
                        rdevice.contentValue = matchedDevice.contentValue;
                        [_commandArray removeObject:rdevice];
                        
                        isStatusChanged = YES;
                    }
                    
#ifdef DEBUG_MODE
                    NSLogInfo(@"==########== device command status = %@, elapsedTime = %zd ==########==", [JDFacade facade].loginUser.homehubOnlineState, elapsedTime);
#endif
                }];
            }
            
            if (_commandArray.count) {//커맨드 실행 중인 디바이스가 있을 경우,
                //schedul timer.
                if (!_deviceCommandsBackgroundTimer) {
                    _deviceCommandsBackgroundTimer = [NSTimer scheduledTimerWithTimeInterval:3 target:self selector:@selector(requestPollingCommandStatusOfDeviceInBackground:) userInfo:nil repeats:YES];
                }
            } else {
                [_deviceCommandsBackgroundTimer invalidate];
                _deviceCommandsBackgroundTimer = nil;
            }
            
            //변화가 있을 경우, 컬렉션뷰를 리로드
            if (isStatusChanged) {
                [_collectionView reloadData];
                
                ThingsDetailViewController *vc = (ThingsDetailViewController *)[JDFacade facade].currentViewController;
                if (vc) {
                    [vc.tableView reloadData];
                }
            }
        });
    }
}

- (NSInteger)elapsedSecondsFromNow:(DeviceModel *)runningDevice {
    NSInteger seconds = 0;
    if (runningDevice.requestTime && ![runningDevice.requestTime isEmptyString]) {
        NSDate *rdate = [CommonUtil dateFromDateString:[CommonUtil localDateFromUTC:runningDevice.requestTime]];
        NSTimeInterval elapsed = [[NSDate systemDate] timeIntervalSinceDate:rdate];
        seconds = elapsed;
    }
    return seconds;
}

- (NSInteger)elapsedSecondsFrom:(DeviceModel *)runningDevice to:(DeviceModel *)fetchedDevice {
    NSInteger seconds = 0;
    if (runningDevice.requestTime && ![runningDevice.requestTime isEmptyString] && fetchedDevice.collectTime && ![fetchedDevice.collectTime isEmptyString]) {
        NSDate *rdate = [CommonUtil dateFromDateString:[CommonUtil localDateFromUTC:runningDevice.requestTime]];
        NSDate *fdate = [CommonUtil dateFromDateString:[CommonUtil localDateFromUTC:fetchedDevice.collectTime]];
        seconds = [fdate secondsAfterDate:rdate];
    }
    return seconds;
}

- (void)addNewDevice {
    UIViewController *vc = [CommonUtil instantiateViewControllerWithIdentifier:@"ThingsAddViewController" storyboardName:@"Things"];
    [self presentViewController:vc animated:YES completion:nil];
}

- (void)toggleEditMode {
    _isDeleteMode = !_isDeleteMode;
    
    [_collectionView reloadData];
    
    _constraintEditModeRight.constant = _isDeleteMode ? 0 : -_editModeView.width;
    
    [UIView animateWithDuration:kfAnimationDur animations:^{
        [self.view layoutIfNeeded];
    }];
}


- (void)refreshDeviceList {
    [self performSelector:@selector(requestDeviceList) withObject:nil afterDelay:0.0f];
}

#pragma mark - Main Logic

- (void)requestDeviceListRecently {
    DeviceModel *firstDevice = [_deviceList firstObject];
    _pagingType = ksListPagingTypeUpward;
    _pagingId = firstDevice.createDatetime;
    
    [self performSelector:@selector(requestDeviceList) withObject:nil afterDelay:0.0f];
}

- (void)requestDeviceListOlder {
    DeviceModel *lastDevice = [_deviceList lastObject];
    _pagingType = ksListPagingTypeDownward;
    _pagingId = lastDevice.createDatetime;
    
    [self performSelector:@selector(requestDeviceList) withObject:nil afterDelay:0.0f];
}

- (void)requestDeviceList {

    //parameters
    NSDictionary *parameter = @{@"paging_datetime": _pagingId ? _pagingId : ksEmptyString,
                                @"paging_type": _pagingType ? _pagingType : ksEmptyString};

    NSString *path = [NSString stringWithFormat:API_GET_DEVICE_LIST];

    [[RequestHandler handler] sendAsyncGetRequestAPIPath:path parameters:parameter modelClass:[DeviceListModel class] completion:^(id responseObject) {
        if (!responseObject) {//응답결과가 잘못되었거나 없을 경우,
            return;
        }

        DeviceListModel *deviceList = (DeviceListModel *)responseObject;

        if (deviceList && deviceList.list && deviceList.list.count) {
            _deviceList = deviceList.list;
            
            [self updateTitle];
        } else {
            if (!_deviceList.count) {//이미 로드된 데이터가 있을 경우는 출력하지 않음.
//                    NoContentView *noContentView = [NoContentView viewFromNib];
//                    _tableView.tableFooterView = noContentView;
            }
        }
        [self matchDeviceListWithOnCommandsDevices];

    } failure:^(id errorObject) {
        JDErrorModel *error = (JDErrorModel *)errorObject;
        [[JDFacade facade] alert:error.errorMessage];
    }];
}

- (void)updateTitle {
    
    if (![JDFacade facade].loginUser.isHomehubOnline) {
        _lblTitle.text = @"홈허브 오프라인";
        [_lblTitle setColor:kUITextColor02 text:_lblTitle.text];
        return;
    }
    
    _lblTitle.text = [NSString stringWithFormat:@"장치 전체 %zd", _deviceList.count];
    [_lblTitle setColor:kUITextColor02 text:[NSString stringWithFormat:@"%zd", _deviceList.count]];
}

- (void)matchDeviceListWithOnCommandsDevices {
    
    for (DeviceModel *rdevice in _commandArray) {
        DeviceModel *matchedDevice = [_deviceList objectByUsingPredicateFormat:@"deviceId == %@ && nodeId == %@", rdevice.deviceId, rdevice.nodeId]; //일치하는 디바이스가 있을 경우, 추가하지 않음.
        if (matchedDevice) {
            
            matchedDevice.isRequesting = rdevice.isRequesting;
            matchedDevice.requestTime = rdevice.requestTime;
        }
    }
    
    [_collectionView reloadData];
}

#pragma mark - UICollectionView Delegate

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    
    NSInteger auth = [JDFacade facade].loginUser.level == 90 && !_isDeleteMode; //마스터 권한일 경우,
    NSInteger count = _deviceList.count % 2 == 0 ? _deviceList.count : _deviceList.count + auth; //홀수일 경우, 멤버 초대 버튼을 추가해줌.
    return count;
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    
    UICollectionViewCell *rcell = nil;
    
    if (indexPath.row < _deviceList.count) {
        ThingsCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"ThingsCellIdentifier" forIndexPath:indexPath];
        
        DeviceModel *device =_deviceList[indexPath.row];
        cell.indexPath = indexPath;
        
        [cell.btnDevice sd_setImageWithURL:[NSURL URLWithString:device.imageFileName] forState:UIControlStateNormal
                        placeholderImage:nil
                        options:SDWebImageRefreshCached
                        completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
            [cell layoutIfNeeded];
        }];
        
        cell.lblDeviceName.text = device.deviceName;
        
        //커맨드 클래스 뷰를 초기화함.
        [[cell.controlContainer subviews] enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
            UIView *subview = (UIView *)obj;
            [subview removeFromSuperview];
        }];
        
        cell.btnDelete.hidden = !_isDeleteMode;
        cell.controlContainer.hidden = _isDeleteMode;

        cell.aiv.hidden = !device.isRequesting;
        if (!cell.aiv.hidden) {//show
            [cell.aiv startAnimating];
            
            cell.btnDelete.userInteractionEnabled = NO;
            
        } else {//hide
            [cell.aiv stopAnimating];
            
            cell.btnDelete.userInteractionEnabled = YES;
        }
        
        if (!cell.controlContainer.hidden) {
            //허브 On-Off line check
            cell.lblDeviceStatus.hidden = !([[JDFacade facade].loginUser.homehubOnlineState isEqualToString:@"OFF"] || [device.onlineState isEqualToString:@"OFF"]);
            cell.controlContainer.hidden = !cell.lblDeviceStatus.hidden;
            
            if (cell.controlContainer.hidden) {
                cell.lblDeviceStatus.text = @"OFFLINE";
                
            } else {//커맨드 클래스 타입별 컨트롤 호출

                CommandClassControlView *controlView = [CommandClassControlView viewForCommandClass:device.cmdclsType];
                controlView.device = device;
                
                cell.controlContainer.hidden = !controlView;
                if (!cell.controlContainer.hidden) {
                    UIView *superview = cell.controlContainer;
                    [superview addSubview:controlView];
                    
                    [controlView mas_makeConstraints:^(MASConstraintMaker *make) {
                        make.size.mas_equalTo(controlView.frame.size);
                        make.center.equalTo(superview);
                    }];
                }
            }
            
        } else {
            cell.btnDelete.value = device;
            if (![cell.btnDelete actionsForTarget:self forControlEvent:UIControlEventTouchUpInside]) {
                [cell.btnDelete addTarget:self action:@selector(btnDeleteTouched:) forControlEvents:UIControlEventTouchUpInside];
            }
        }
        
        rcell = cell;
        
    } else {//디바이스 추가 옵션
        ThingsAddCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"AddCollectionCellIdentifier" forIndexPath:indexPath];
        
        if (![cell.btnAdd actionsForTarget:self forControlEvent:UIControlEventTouchUpInside]) {
            [cell.btnAdd addTarget:self action:@selector(addNewDevice) forControlEvents:UIControlEventTouchUpInside];
        }
        rcell = cell;
    }
    
    return rcell;
}

- (void)btnDeleteTouched:(id)sender {
    CustomButton *btn = (CustomButton *)sender;
    
    DeviceModel *device = (DeviceModel *)btn.value;
    
    ThingsAddStartViewController *vc = [CommonUtil instantiateViewControllerWithIdentifier:@"ThingsAddStartViewController" storyboardName:@"Things"];
    vc.removableDevice = device;
    if (device.groupName && ![device.groupName isEmptyString]) {
        vc.removableGroups = [_deviceList filteredArrayUsingPredicateFormat:@"groupName == %@", device.groupName]; //group devices
    }
    
    vc.providesPresentationContextTransitionStyle = YES;
    vc.definesPresentationContext = YES;
    
    [vc setModalPresentationStyle:UIModalPresentationOverCurrentContext];
    
    [self presentViewController:vc animated:NO completion:nil];
}


- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView
           viewForSupplementaryElementOfKind:(NSString *)kind
                                 atIndexPath:(NSIndexPath *)indexPath
{

    ThingsCollectionFooterView *footerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionFooter
                                                                                    withReuseIdentifier:@"FooterIdentifier" forIndexPath:indexPath];
    if (![footerView.btnAdd actionsForTarget:self forControlEvent:UIControlEventTouchUpInside]) {
        [footerView.btnAdd addTarget:self action:@selector(addNewDevice) forControlEvents:UIControlEventTouchUpInside];
    }
    return footerView;
}

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForFooterInSection:(NSInteger)section {
    
    //FIXME : 권한 추가
//    if (_memberList.count % 2 == 1 || [JDFacade facade].loginUser.level < 90 || _isDeleteMode)  {//마스터 권한이 아니거나, 짝수가 아닐 경우
    if (_deviceList.count % 2 == 1 || _isDeleteMode)  {//마스터 권한이 아니거나, 짝수가 아닐 경우
        return CGSizeZero;
    }
    
    return CGSizeMake(IPHONE_WIDTH, 160.0f);
}

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
    if (IPHONE_WIDTH == 414.0f) {//아이폰 6일 경우,
        return CGSizeMake(212.0f, 197.0f);
    } else if (IPHONE_WIDTH == 375.0f) {//아이폰 6+일경우
        return CGSizeMake(187.5, 197.0f);
    }
    return CGSizeMake(160.0f, 197.0f);
}

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    [collectionView deselectItemAtIndexPath:indexPath animated:YES];
    
    if (indexPath.row < _deviceList.count) {//디바이스인 경우,
        ThingsCollectionViewCell *cell = (ThingsCollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:@"ThingsCellIdentifier" forIndexPath:indexPath];
        DeviceModel *device = _deviceList[indexPath.row];
        
        ThingsDetailViewController *vc = (ThingsDetailViewController *)[CommonUtil instantiateViewControllerWithIdentifier:@"ThingsDetailViewController" storyboardName:@"Things"];
        vc.refDevice = device;
        [self presentViewController:vc animated:YES completion:nil];
    }
}


#pragma mark - UI Events
- (void)btnAddHubTouched:(id)sender {
    [[JDFacade facade] gotoHomeHubRegistration];
}

- (IBAction)btnOptionTouched:(id)sender {
    [self toggleOptions:sender];
}

- (IBAction)btnCloseOnEditModeTouched:(id)sender {
    [self toggleEditMode];
}

#pragma mark - MemoryWarning

- (void)viewWillDisappear:(BOOL)animated {
    
    if (_deviceCommandsBackgroundTimer) {
        [_deviceCommandsBackgroundTimer invalidate];
        _deviceCommandsBackgroundTimer = nil;
    }
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end