//
//  SBRScriptPolicy.m
//  App
//
//  Created by James Magahern on 10/15/21.
//

#import "SBRScriptPolicy.h"

// For icon drawing
#import <UIKit/UIKit.h>

@implementation SBRScriptPolicy

+ (NSString *)titleForPolicyType:(SBRScriptOriginPolicyType)policyType
{
    switch (policyType) {
        case SBRScriptOriginPolicyTypeAlpha:
            return @"Alpha";
        case SBRScriptOriginPolicyTypeBravo:
            return @"Bravo";
        case SBRScriptOriginPolicyTypeCharlie:
            return @"Charlie";
        case SBRScriptOriginPolicyTypeDelta:
            return @"Delta";
        case SBRScriptOriginPolicyTypeEcho:
            return @"Echo";
    }
}

+ (NSString *)localizedDescriptionForPolicyType:(SBRScriptOriginPolicyType)policyType
{
    switch (policyType) {
        case SBRScriptOriginPolicyTypeAlpha:
            return @"All scripts blocked.";
        case SBRScriptOriginPolicyTypeBravo:
            return @"Scripts on page are allowed.";
        case SBRScriptOriginPolicyTypeCharlie:
            return @"Allow scripts from the same security origin.";
        case SBRScriptOriginPolicyTypeDelta:
            return @"Allow scripts from common and host CDNs.";
        case SBRScriptOriginPolicyTypeEcho:
            return @"All scripts are allowed.";
    }
}

+ (UIImage *)iconRepresentationForPolicyType:(SBRScriptOriginPolicyType)policyType withSize:(CGSize)size
{
    UIFont *font = [UIFont boldSystemFontOfSize:size.height - 2];
    NSDictionary<NSAttributedStringKey, id> *attrs = @{
        NSFontAttributeName : font,
        NSForegroundColorAttributeName : [UIColor whiteColor]
    };
    
    const CGRect rect = (CGRect) { .origin = CGPointZero, .size = size };
    UIGraphicsBeginImageContextWithOptions(size, NO, UIScreen.mainScreen.scale);
    
    UIBezierPath *backgroundPath = [UIBezierPath bezierPathWithRoundedRect:rect cornerRadius:4.0];
    [backgroundPath fill];
    
    NSString *character = @"";
    switch (policyType) {
        case SBRScriptOriginPolicyTypeAlpha:
            character = @"𝝰"; break;
        case SBRScriptOriginPolicyTypeBravo:
            character = @"𝝱"; break;
        case SBRScriptOriginPolicyTypeCharlie:
            character = @"𝝲"; break;
        case SBRScriptOriginPolicyTypeDelta:
            character = @"𝝳"; break;
        case SBRScriptOriginPolicyTypeEcho:
            character = @"𝝴"; break;
    }
        
    const CGSize charSize = [character sizeWithAttributes:attrs];
    const CGRect charRect = (CGRect) {
        .origin = (CGPoint) {
            .x =  (size.width - charSize.width) / 2,
            .y = -(charSize.height - size.height) / 2,
        },
        
        .size = charSize
    };
    
    [character drawInRect:charRect withAttributes:attrs];
    
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return image;
}

+ (BOOL)supportsSecureCoding
{
    return YES;
}

- (instancetype)initWithSecurityOrigin:(NSString *)origin policyType:(SBRScriptOriginPolicyType)policyType
{
    if (self = [super init]) {
        _origin = [origin copy];
        _policyType = policyType;
    }
    
    return self;
}

- (instancetype)initWithCoder:(NSCoder *)coder
{
    NSString *origin = [coder decodeObjectForKey:@"origin"];
    NSNumber *policyTypeNumber = [coder decodeObjectForKey:@"policyType"];
    return [self initWithSecurityOrigin:origin policyType:[policyTypeNumber integerValue]];
}

- (void)encodeWithCoder:(NSCoder *)coder
{
    [coder encodeObject:_origin forKey:@"origin"];
    [coder encodeObject:[NSNumber numberWithInteger:_policyType] forKey:@"policyType"];
}

@end