//
//  PBDropdownMenu.m
//  IphoneBIMe
//
//  Created by zjf on 2018/8/8.
//  Copyright © 2018年 ProBIM. All rights reserved.
//

#import "PBDropdownMenu.h"
#import "PBIssueNavModel.h"
#define SCREEN_WIDTH [UIScreen mainScreen].bounds.size.width
#define SCREEN_HEIGHT [UIScreen mainScreen].bounds.size.height
#define AnimateTime 0.25f   // 下拉动画时间
@interface PBDropdownMenu()<UIGestureRecognizerDelegate>
@property (nonatomic, strong) UIView *backgroundView;//背景视图
@property (nonatomic, strong) UITableView *tableView;//选择列表
@property (nonatomic, assign) BOOL isShow;//标识是否是弹出状态
@property (nonatomic, strong) NSMutableArray *selectIndexArr;//标识是否是弹出状态
@property (nonatomic, assign) NSInteger currentSelectIndex;//标识是否是弹出状态
@property (nonatomic, strong) NSMutableArray *buttonArr;//标识是否是弹出状态
@end
@implementation PBDropdownMenu {
    CGFloat _rowHeight;   // 下拉列表行高
    NSArray *_titleArr;
}

- (void)setBtnTitle:(NSString *)title {
    UIButton *clickBtn = self.buttonArr[self.currentSelectIndex];
    [clickBtn setTitle:title forState:UIControlStateNormal];
    CGFloat imageWidth = clickBtn.imageView.bounds.size.width;
    CGFloat labelWidth = clickBtn.titleLabel.bounds.size.width;
    clickBtn.imageEdgeInsets = UIEdgeInsetsMake(0, labelWidth, 0, -labelWidth);
    clickBtn.titleEdgeInsets = UIEdgeInsetsMake(0, -imageWidth, 0, imageWidth);
}


- (instancetype)initWithFrame:(CGRect)frame andArr:(NSArray *)arr {
    if (self = [super initWithFrame:frame]) {
        _titleArr = arr;
        [self creatMenuListWithArr:arr];
    }
    return self;
}
- (void)creatMenuListWithArr:(NSArray *)arr {
    _rowHeight = 40.f;
    CGFloat meunWidth = self.width / arr.count;
    for (NSInteger i = 0; i < arr.count; i++) {
        UIButton *clickBtn = [[UIButton alloc] init];
        clickBtn.backgroundColor = [UIColor z_colorWithR:242 G:242 B:242];
        [clickBtn setFrame:CGRectMake(meunWidth * i, 0, meunWidth, self.height)];
        clickBtn.titleLabel.font = [UIFont systemFontOfSize:TitleFontSize];
        [clickBtn setTitleColor:TitleColor forState:UIControlStateNormal];
        PBIssueNavModel *issueNavModel = arr[i][0];
        [clickBtn setImage:[UIImage imageNamed:@"Issue_ retrieve_default"] forState:UIControlStateNormal];
        [clickBtn setTitle:issueNavModel.ItemName forState:UIControlStateNormal];
        CGFloat imageWidth = clickBtn.imageView.bounds.size.width;
        CGFloat labelWidth = clickBtn.titleLabel.bounds.size.width;
        clickBtn.imageEdgeInsets = UIEdgeInsetsMake(0, labelWidth, 0, -labelWidth);
        clickBtn.titleEdgeInsets = UIEdgeInsetsMake(0, -imageWidth, 0, imageWidth);
        clickBtn.selected = NO;
        [clickBtn addTarget:self action:@selector(clickMainBtn:) forControlEvents:UIControlEventTouchUpInside];
        clickBtn.tag = 100 + i;
        [self.buttonArr addObject:clickBtn];
        [self addSubview:clickBtn];
    }
}
#pragma mark - 点击方法
- (void)clickMainBtn:(UIButton *)button{
    if (_currentSelectIndex == (button.tag - 100)) {
        if (_isShow) {
            [self hideDropDown];
        }else {
            [self showDropDown];
        }
    }else {
        if (_isShow) {
            [self hideDropDown];
        }else {
            self.currentSelectIndex = button.tag - 100;
            [self showDropDown];
        }
    }
}
#pragma mark - 显示下拉列表
- (void)showDropDown {
    [self.superview addSubview:self.backgroundView];
    [self.backgroundView addSubview:self.tableView];
    UIButton *clickBtn = self.buttonArr[self.currentSelectIndex];
    [UIView animateWithDuration:AnimateTime animations:^{
        clickBtn.imageView.transform = CGAffineTransformMakeRotation(M_PI);
        NSArray *titles = self->_titleArr[self.currentSelectIndex];
        CGFloat tableViewH = self->_rowHeight * titles.count;
        if (tableViewH > self->_rowHeight * 4) {
            tableViewH = self->_rowHeight * 4;
        }
        self->_tableView.frame = CGRectMake(0, 0, SCREEN_WIDTH, tableViewH);
        self.backgroundView.backgroundColor = [UIColor colorWithWhite:0 alpha:0.3];
    }completion:^(BOOL finished) {
        self->_isShow = YES;
    }];
    [clickBtn setTitleColor:WarningColor forState:UIControlStateNormal];
    [clickBtn setImage:[UIImage imageNamed:@"Issue_ retrieve_show"] forState:UIControlStateNormal];
}
#pragma mark -  隐藏下拉列表
- (void)hideDropDown{
    UIButton *clickBtn = self.buttonArr[self.currentSelectIndex];
    [UIView animateWithDuration:AnimateTime animations:^{
        clickBtn.imageView.transform = CGAffineTransformIdentity;
        self.backgroundView.backgroundColor = [UIColor colorWithWhite:0 alpha:0];
        self->_tableView.frame = CGRectMake(0, 0, SCREEN_WIDTH, 0);
    }completion:^(BOOL finished) {
        [self.backgroundView removeFromSuperview];
        [self.tableView removeFromSuperview];
        self->_isShow = NO;
    }];
    [clickBtn setTitleColor:TitleColor forState:UIControlStateNormal];
    [clickBtn setImage:[UIImage imageNamed:@"Issue_ retrieve_default"] forState:UIControlStateNormal];
}

#pragma mark - UITableView Delegate
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    return _rowHeight;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    NSArray *titles = _titleArr[self.currentSelectIndex];
    return titles.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    NSArray *titles = _titleArr[self.currentSelectIndex];
    NSInteger selectIndex = [self.selectIndexArr[self.currentSelectIndex] integerValue];
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        //---------------------------下拉选项样式，可在此处自定义-------------------------
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
        cell.textLabel.font          = [UIFont systemFontOfSize:16.f];
//        cell.textLabel.textColor     = [UIColor blackColor];
//        cell.selectionStyle          = UITableViewCellSelectionStyleNone;
        
        //---------------------------------------------------------------------------
    }
    if (selectIndex == indexPath.row) {
        cell.textLabel.textColor     = WarningColor;
        cell.selectionStyle          = UITableViewCellSelectionStyleBlue;
    }else {
        cell.textLabel.textColor     = TitleColor;
        cell.selectionStyle          = UITableViewCellSelectionStyleNone;
    }
    PBIssueNavModel *issueNavModel = titles[indexPath.row];
    cell.textLabel.text = issueNavModel.ItemName;
    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    self.selectIndexArr[self.currentSelectIndex] = [NSNumber numberWithInteger:indexPath.row];
    NSArray *titles = _titleArr[self.currentSelectIndex];
    PBIssueNavModel *issueNavModel = titles[indexPath.row];
    [self setBtnTitle:issueNavModel.ItemName];
    if ([self.delegate respondsToSelector:@selector(dropdownMenu:selectedCellNumber:)]) {
        [self.delegate dropdownMenu:self.buttonArr[self.currentSelectIndex] selectedCellNumber:indexPath.row];
    }
    [self hideDropDown];
}

- (UIView *)backgroundView {
    if (_backgroundView == nil) {
        _backgroundView = [[UIView alloc] initWithFrame:CGRectMake(0 , self.y + self.height, SCREEN_WIDTH, SCREEN_HEIGHT - self.y - self.height)];
        _backgroundView.backgroundColor = [UIColor colorWithWhite:0 alpha:0];
        [_backgroundView setOpaque:NO];
        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(backTapped:)];
        tap.delegate = self;
        [_backgroundView addGestureRecognizer:tap];
    }
    return _backgroundView;
}

- (void)backTapped:(UITapGestureRecognizer *)sender {
    [self hideDropDown];
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    if ([NSStringFromClass([touch.view class]) isEqualToString:@"UITableViewCellContentView"]) {
        return NO;
    } else {
        return YES;
    }
}
- (UITableView *)tableView {
    _tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0,SCREEN_WIDTH,0)];
    _tableView.delegate = self;
    _tableView.dataSource = self;
    _tableView.bounces = NO;
    return _tableView;
}
- (NSMutableArray *)selectIndexArr {
    if (_selectIndexArr == nil) {
        _selectIndexArr = [[NSMutableArray alloc] init];
        for (NSInteger i = 0; i < _titleArr.count; i++) {
            [_selectIndexArr addObject:[NSNumber numberWithInteger:0]];
        }
    }
    return _selectIndexArr;
}
- (NSMutableArray *)buttonArr {
    if (_buttonArr == nil) {
        _buttonArr = [[NSMutableArray alloc] init];
    }
    return _buttonArr;
}

@end