/*
 Copyright 2014 OpenMarket Ltd
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 
 http://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

#import "RoomMemberTableCell.h"
#import "MatrixHandler.h"

@implementation RoomMemberTableCell

// returns the presence color
// nil if there is no valid one
- (UIColor*) getUserPresenceColor:(MXUser*) user
{
    if (user) {
        switch (user.presence) {
            case MXPresenceOnline:
                return [UIColor colorWithRed:0.2 green:0.9 blue:0.2 alpha:1.0];
            case MXPresenceUnavailable:
                return [UIColor colorWithRed:0.9 green:0.9 blue:0.0 alpha:1.0];
            case MXPresenceOffline:
                return [UIColor colorWithRed:0.9 green:0.2 blue:0.2 alpha:1.0];
            case MXPresenceUnknown:
            case MXPresenceFreeForChat:
            case MXPresenceHidden:
            default:
                return nil;
        }
    }
    
    return nil;
}

- (NSString*)getLastPresenceText:(MXUser*)user {

    NSString* presenceText = nil;
    
    // Prepare last active ago string
    NSUInteger lastActiveAgoInSec = user.lastActiveAgo / 1000;
    if (lastActiveAgoInSec < 60) {
        presenceText = [NSString stringWithFormat:@"%lus", (unsigned long)lastActiveAgoInSec];
    } else if (lastActiveAgoInSec < 3600) {
        presenceText = [NSString stringWithFormat:@"%lum", (unsigned long)(lastActiveAgoInSec / 60)];
    } else if (lastActiveAgoInSec < 86400) {
        presenceText = [NSString stringWithFormat:@"%luh", (unsigned long)(lastActiveAgoInSec / 3600)];
    } else {
        presenceText = [NSString stringWithFormat:@"%lud", (unsigned long)(lastActiveAgoInSec / 86400)];
    }
    
    // Check presence
    switch (user.presence) {
        case MXPresenceOffline: {
            presenceText = @"offline";
            break;
        }
        case MXPresenceHidden:
        case MXPresenceUnknown:
        case MXPresenceFreeForChat: {
            presenceText = nil;
            break;
        }
        case MXPresenceOnline:
        case MXPresenceUnavailable:
        default:
            break;
    }
    
    return presenceText;
}

- (void) setPowerContainerValue:(CGFloat)progress
{
    // no power level -> hide the pie
    if (0 == progress) {
        self.powerContainer.hidden = YES;
        return;
    }

    // display it
    self.powerContainer.hidden = NO;

    // defines the view settings
    CGFloat radius = self.powerContainer.frame.size.width / 2;
    
    // draw a rounded view
    [self.powerContainer.layer setCornerRadius:radius];
    
    // the default body color is gray
    self.powerContainer.backgroundColor = [UIColor lightGrayColor];
    
    // draw the pie
    CALayer* layer = [self.powerContainer layer];

    // remove any previous drawn layer
    if (powerContainerLayer) {
        [powerContainerLayer removeFromSuperlayer];
    }

    // create the red layer
    powerContainerLayer = [CAShapeLayer layer];
    [powerContainerLayer setZPosition:0];
    [powerContainerLayer setStrokeColor:NULL];

    // power level is drawn in red
    powerContainerLayer.fillColor = [UIColor redColor].CGColor;
    
    // build the path
    CGMutablePathRef path = CGPathCreateMutable();
    CGPathMoveToPoint(path, NULL, radius, radius);
    
    CGPathAddArc(path, NULL, radius, radius, radius, -M_PI / 2, (progress * 2 * M_PI) - (M_PI / 2), 0);
    CGPathCloseSubpath(path);
    
    [powerContainerLayer setPath:path];
    CFRelease(path);

    // add the sub layer
    [layer addSublayer:powerContainerLayer];
}

- (void)setRoomMember:(MXRoomMember *)roomMember withRoom:(MXRoom *)room {
    if (room && roomMember) {
        // set the user info
        self.userLabel.text = [room.state memberName:roomMember.userId];
        
        // user
        self.pictureView.placeholder = @"default-profile";
        self.pictureView.imageURL = roomMember.avatarUrl;
        
        // Round image view
        [self.pictureView.layer setCornerRadius:self.pictureView.frame.size.width / 2];
        self.pictureView.clipsToBounds = YES;
        
        // Shade invited users
        if (roomMember.membership == MXMembershipInvite) {
            for (UIView *view in self.subviews) {
                view.alpha = 0.3;
            }
        } else {
            for (UIView *view in self.subviews) {
                view.alpha = 1;
            }
        }

        // user info
        CGFloat powerLevel = 0;
        NSString* presenceText = nil;
        UIColor* thumbnailBorderColor = nil;
        
        // Customize banned and left (kicked) members
        if (roomMember.membership == MXMembershipLeave || roomMember.membership == MXMembershipBan) {
            self.backgroundColor = [UIColor colorWithRed:0.8 green:0.8 blue:0.8 alpha:1.0];
            presenceText = (roomMember.membership == MXMembershipLeave) ? @"left" : @"banned";
        } else {
            self.backgroundColor = [UIColor whiteColor];
            
            // Handle power level display
            //self.userPowerLevel.hidden = NO;
            MXRoomPowerLevels *roomPowerLevels = room.state.powerLevels;

            int maxLevel = 0;
            for (NSString *powerLevel in roomPowerLevels.users.allValues) {
                int level = [powerLevel intValue];
                if (level > maxLevel) {
                    maxLevel = level;
                }
            }
            NSUInteger userPowerLevel = [roomPowerLevels powerLevelOfUserWithUserID:roomMember.userId];
            float userPowerLevelFloat = 0.0;
            if (userPowerLevel) {
                userPowerLevelFloat = userPowerLevel;
            }

            powerLevel = maxLevel ? userPowerLevelFloat / maxLevel : 1;

            // get the user presence and his thumbnail border color
            if (roomMember.membership == MXMembershipInvite) {
                thumbnailBorderColor = [UIColor lightGrayColor];
                presenceText = @"invited";
            } else {
                // Get the user that corresponds to this member
                MatrixHandler *mxHandler = [MatrixHandler sharedHandler];
                MXUser *user = [mxHandler.mxSession userWithUserId:roomMember.userId];
                
                // existing user ?
                if (user) {
                    thumbnailBorderColor = [self getUserPresenceColor:user];
                    presenceText = [self getLastPresenceText:user];
                }
            }
        }

        // display the power level pie
        [self setPowerContainerValue:powerLevel];
        
        // if the thumbnail is defined
        if (thumbnailBorderColor) {
            self.pictureView.layer.borderWidth = 2;
            self.pictureView.layer.borderColor = thumbnailBorderColor.CGColor;
        } else {
            // remove the border
            // else it draws black border
            self.pictureView.layer.borderWidth = 0;
        }

        // and the presence text (if any)
        if (presenceText) {
            NSString* extraText = [NSString stringWithFormat:@"(%@)", presenceText];
            self.userLabel.text = [NSString stringWithFormat:@"%@ %@", self.userLabel.text, extraText];
            
            NSRange range = [self.userLabel.text rangeOfString:extraText];
            UIFont* font = self.userLabel.font;
            
            // Create the attributes
            NSDictionary *attrs = [NSDictionary dictionaryWithObjectsAndKeys:
                                   font, NSFontAttributeName,
                                   self.userLabel.textColor, NSForegroundColorAttributeName, nil];
            
            NSDictionary *subAttrs = [NSDictionary dictionaryWithObjectsAndKeys:
                                      font, NSFontAttributeName,
                                      [UIColor lightGrayColor], NSForegroundColorAttributeName, nil];
            
            // Create the attributed string (text + attributes)
            NSMutableAttributedString *attributedText =[[NSMutableAttributedString alloc] initWithString:self.userLabel.text attributes:attrs];
            [attributedText setAttributes:subAttrs range:range];
            
            // Set it in our UILabel and we are done!
            [self.userLabel setAttributedText:attributedText];
        }
    }
}
@end