/*!
 * iOS SDK
 *
 * Tencent is pleased to support the open source community by making
 * Hippy available.
 *
 * Copyright (C) 2019 THL A29 Limited, a Tencent company.
 * All rights reserved.
 *
 * 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 "HPConvert.h"
#import "HPParserUtils.h"
#import "HPToolUtils.h"

#include <objc/message.h>

@implementation HPConvert

// clang-format off

HP_CONVERTER(id, id, self)
HP_CONVERTER(BOOL, BOOL, boolValue)
HP_NUMBER_CONVERTER(double, doubleValue)
HP_NUMBER_CONVERTER(float, floatValue)
HP_NUMBER_CONVERTER(int, intValue)
HP_NUMBER_CONVERTER(int64_t, longLongValue)
HP_NUMBER_CONVERTER(uint64_t, unsignedLongLongValue)
HP_NUMBER_CONVERTER(NSInteger, integerValue)
HP_NUMBER_CONVERTER(NSUInteger, unsignedIntegerValue)
/**
 * This macro is used for creating converter functions for directly
 * representable json values that require no conversion.
 */
#if HP_DEBUG
#define HP_JSON_CONVERTER(type)                  \
    +(type *)type : (id)json {                              \
        if ([json isKindOfClass:[type class]]) {            \
            return json;                                    \
        } else if (json) {                                  \
            HPLogConvertError(json, @ #type);     \
        }                                                   \
        return nil;                                         \
    }
#else
#define HP_JSON_CONVERTER(type)  \
    +(type *)type : (id)json {              \
        return json;                        \
    }
#endif

HP_JSON_CONVERTER(NSArray)
HP_JSON_CONVERTER(NSDictionary)
HP_JSON_CONVERTER(NSString)
HP_JSON_CONVERTER(NSNumber)
            
HP_CUSTOM_CONVERTER(NSSet *, NSSet, [NSSet setWithArray:json])

+ (NSData*)NSData:(id)json {
    if([json isKindOfClass:[NSString class]]) {
        return [json dataUsingEncoding:NSUTF8StringEncoding];
    }else if([json isKindOfClass:[NSData class]]) {
        return (NSData*)json;
    }
    return nil;
}

+ (NSIndexSet *)NSIndexSet : (id)json {
    json = [self NSNumberArray:json];
    NSMutableIndexSet *indexSet = [NSMutableIndexSet new];
    for (NSNumber *number in json) {
        NSInteger index = number.integerValue;
        if (HP_DEBUG && index < 0) {
            HPLogError(@"Invalid index value %ld. Indices must be positive.", (long)index);
        }
        [indexSet addIndex:index];
    }
    return indexSet;
}

+ (NSURL *)NSURL:(id)json {
    NSString *path = [self NSString:json];
    if (!path) {
        return nil;
    }

    @try {  // NSURL has a history of crashing with bad input, so let's be safe

        NSURL *URL = HPURLWithString(path, NULL);
        if (URL.scheme) {  // Was a well-formed absolute URL
            return URL;
        }

        // Check if it has a scheme
        if ([path rangeOfString:@":"].location != NSNotFound) {
            NSData *uriData = [path dataUsingEncoding:NSUTF8StringEncoding];
            if (nil == uriData) {
                return nil;
            }
            CFURLRef urlRef = CFURLCreateWithBytes(NULL, (const UInt8 *)[uriData bytes], [uriData length], kCFStringEncodingUTF8, NULL);
            // bug:直接将CFURLRef转化为NSURL，如果包含有汉字字符，UIWebView载入之后，在shouldstartload中的request对应的URL会出现不正确的情况，不知道为什么。只能先转换为string，在转换为NSURL解决
            CFStringRef stringRef = CFURLGetString(urlRef);
            URL = HPURLWithString((__bridge NSString *)stringRef, NULL);
            CFRelease(urlRef);
            if (URL) {
                return URL;
            }
        }

        // Assume that it's a local path
        path = path.stringByRemovingPercentEncoding;
        if ([path hasPrefix:@"~"]) {
            // Path is inside user directory
            path = path.stringByExpandingTildeInPath;
        } else if (!path.absolutePath) {
            // Assume it's a resource path
            path = [[NSBundle mainBundle].resourcePath stringByAppendingPathComponent:path];
        }
        if (!(URL = [NSURL fileURLWithPath:path])) {
            HPLogConvertError(json, @"a valid URL");
        }
        return URL;
    } @catch (__unused NSException *e) {
        HPLogConvertError(json, @"a valid URL");
        return nil;
    }
}

+ (NSURLRequest *)NSURLRequest:(id)json {
    if ([json isKindOfClass:[NSString class]]) {
        NSURL *URL = [self NSURL:json];
        return URL ? [NSURLRequest requestWithURL:URL] : nil;
    }
    if ([json isKindOfClass:[NSDictionary class]]) {
        NSString *URLString = json[@"uri"] ?: json[@"url"];

        NSURL *URL;
        NSString *bundleName = json[@"bundle"];
        if (bundleName) {
            URLString = [NSString stringWithFormat:@"%@.bundle/%@", bundleName, URLString];
        }

        URL = [self NSURL:URLString];
        if (!URL) {
            return nil;
        }

        NSData *body = [self NSData:json[@"body"]];
        NSString *method = [self NSString:json[@"method"]].uppercaseString ?: @"GET";
        NSDictionary *headers = [self NSDictionary:json[@"headers"]];
        if ([method isEqualToString:@"GET"] && headers == nil && body == nil) {
            return [NSURLRequest requestWithURL:URL];
        }

        if (headers) {
            __block BOOL allHeadersAreStrings = YES;
            [headers enumerateKeysAndObjectsUsingBlock:^(__unused NSString *key, id header, BOOL *stop) {
                if (![header isKindOfClass:[NSString class]]) {
                    HPLogError(@"Values of HTTP headers passed must be  of type string. "
                                   "Value of header '%@' is not a string.",
                        key);
                    allHeadersAreStrings = NO;
                    *stop = YES;
                }
            }];
            if (!allHeadersAreStrings) {
                // Set headers to nil here to avoid crashing later.
                headers = nil;
            }
        }

        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];
        request.HTTPBody = body;
        request.HTTPMethod = method;
        request.allHTTPHeaderFields = headers;
        return [request copy];
    }
    if (json) {
        HPLogConvertError(json, @"a valid URLRequest");
    }
    return nil;
}

+ (NSDate *)NSDate:(id)json {
    if ([json isKindOfClass:[NSNumber class]]) {
        return [NSDate dateWithTimeIntervalSince1970:[self NSTimeInterval:json]];
    } else if ([json isKindOfClass:[NSString class]]) {
        static NSDateFormatter *formatter;
        static dispatch_once_t onceToken;
        dispatch_once(&onceToken, ^{
            formatter = [NSDateFormatter new];
            formatter.dateFormat = @"yyyy-MM-dd'T'HH:mm:ss.SSSZZZZZ";
            formatter.locale = [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
            formatter.timeZone = [NSTimeZone timeZoneWithName:@"UTC"];
        });
        NSDate *date = [formatter dateFromString:json];
        if (!date) {
            HPLogError(@"JSON String '%@' could not be interpreted as a date. "
                           "Expected format: YYYY-MM-DD'T'HH:mm:ss.sssZ",
                json);
        }
        return date;
    } else if (json) {
        HPLogConvertError(json, @"a date");
    }
    return nil;
}

// JS Standard for time is milliseconds
HP_CUSTOM_CONVERTER(NSTimeInterval, NSTimeInterval, [self double:json] / 1000.0)

// JS standard for time zones is minutes.
HP_CUSTOM_CONVERTER(NSTimeZone *, NSTimeZone, [NSTimeZone timeZoneForSecondsFromGMT:[self double:json] * 60.0])

NSNumber *HPConvertEnumValue(__unused const char *typeName, NSDictionary *mapping, NSNumber *defaultValue, id json) {
    if (!json) {
        return defaultValue;
    }
    if ([json isKindOfClass:[NSNumber class]]) {
        NSArray *allValues = mapping.allValues;
        if ([allValues containsObject:json] || [json isEqual:defaultValue]) {
            return json;
        }
        HPLogError(@"Invalid %s '%@'. should be one of: %@", typeName, json, allValues);
        return defaultValue;
    }
    if (HP_DEBUG && ![json isKindOfClass:[NSString class]]) {
        HPLogError(@"Expected NSNumber or NSString for %s, received %@: %@", typeName, [json classForCoder], json);
    }
    id value = mapping[json];
    if (HP_DEBUG && !value && [json description].length > 0) {
        HPLogError(@"Invalid %s '%@'. should be one of: %@", typeName, json,
            [[mapping allKeys] sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)]);
    }
    return value ?: defaultValue;
}

NSNumber *HPConvertMultiEnumValue(const char *typeName, NSDictionary *mapping, NSNumber *defaultValue, id json) {
    if ([json isKindOfClass:[NSArray class]]) {
        if ([json count] == 0) {
            return defaultValue;
        }
        long long result = 0;
        for (id arrayElement in json) {
            NSNumber *value = HPConvertEnumValue(typeName, mapping, defaultValue, arrayElement);
            result |= value.longLongValue;
        }
        return @(result);
    }
    return HPConvertEnumValue(typeName, mapping, defaultValue, json);
}

HP_ENUM_CONVERTER(NSLineBreakMode, (@{
    @"clip": @(NSLineBreakByClipping),
    @"head": @(NSLineBreakByTruncatingHead),
    @"tail": @(NSLineBreakByTruncatingTail),
    @"middle": @(NSLineBreakByTruncatingMiddle),
    @"wordWrapping": @(NSLineBreakByWordWrapping),
}),
NSLineBreakByTruncatingTail, integerValue)

HP_ENUM_CONVERTER(NSTextAlignment, (@{
    @"auto": @(NSTextAlignmentNatural),
    @"left": @(NSTextAlignmentLeft),
    @"center": @(NSTextAlignmentCenter),
    @"right": @(NSTextAlignmentRight),
    @"justify": @(NSTextAlignmentJustified),
}),
NSTextAlignmentNatural, integerValue)

HP_ENUM_CONVERTER(NSUnderlineStyle, (@{
    @"solid": @(NSUnderlineStyleSingle),
    @"double": @(NSUnderlineStyleDouble),
    @"dotted": @(NSUnderlinePatternDot | NSUnderlineStyleSingle),
    @"dashed": @(NSUnderlinePatternDash | NSUnderlineStyleSingle),
}),
NSUnderlineStyleSingle, integerValue)

HP_ENUM_CONVERTER(NSWritingDirection, (@{
    @"auto": @(NSWritingDirectionNatural),
    @"ltr": @(NSWritingDirectionLeftToRight),
    @"rtl": @(NSWritingDirectionRightToLeft),
}),
NSWritingDirectionNatural, integerValue)

HP_ENUM_CONVERTER(UITextAutocapitalizationType, (@{
    @"none": @(UITextAutocapitalizationTypeNone),
    @"words": @(UITextAutocapitalizationTypeWords),
    @"sentences": @(UITextAutocapitalizationTypeSentences),
    @"characters": @(UITextAutocapitalizationTypeAllCharacters)
}),
UITextAutocapitalizationTypeSentences, integerValue)

HP_ENUM_CONVERTER(UITextFieldViewMode, (@{
    @"never": @(UITextFieldViewModeNever),
    @"while-editing": @(UITextFieldViewModeWhileEditing),
    @"unless-editing": @(UITextFieldViewModeUnlessEditing),
    @"always": @(UITextFieldViewModeAlways),
}),
UITextFieldViewModeNever, integerValue)

HP_ENUM_CONVERTER(UIKeyboardType, (@{
    @"default": @(UIKeyboardTypeDefault),
    @"phone-pad": @(UIKeyboardTypePhonePad),
    @"email": @(UIKeyboardTypeEmailAddress),
    @"numeric": @(UIKeyboardTypeDecimalPad),
    @"password": @(UIKeyboardTypeTwitter),

    @"ascii-capable": @(UIKeyboardTypeASCIICapable),
    @"numbers-and-punctuation": @(UIKeyboardTypeNumbersAndPunctuation),
    @"url": @(UIKeyboardTypeURL),
    @"number-pad": @(UIKeyboardTypeNumberPad),
    @"name-phone-pad": @(UIKeyboardTypeNamePhonePad),
    @"email-address": @(UIKeyboardTypeEmailAddress),
    @"decimal-pad": @(UIKeyboardTypeDecimalPad),
    @"twitter": @(UIKeyboardTypeTwitter),
    @"web-search": @(UIKeyboardTypeWebSearch),

}),
UIKeyboardTypeDefault, integerValue)

HP_MULTI_ENUM_CONVERTER(UIDataDetectorTypes, (@{
    @"phoneNumber": @(UIDataDetectorTypePhoneNumber),
    @"link": @(UIDataDetectorTypeLink),
    @"address": @(UIDataDetectorTypeAddress),
    @"calendarEvent": @(UIDataDetectorTypeCalendarEvent),
    @"none": @(UIDataDetectorTypeNone),
    @"all": @(UIDataDetectorTypeAll),
}),
UIDataDetectorTypePhoneNumber, unsignedIntegerValue)

HP_ENUM_CONVERTER(UIKeyboardAppearance, (@{
    @"default": @(UIKeyboardAppearanceDefault),
    @"light": @(UIKeyboardAppearanceLight),
    @"dark": @(UIKeyboardAppearanceDark),
}),
UIKeyboardAppearanceDefault, integerValue)

HP_ENUM_CONVERTER(UIReturnKeyType, (@{
    @"default": @(UIReturnKeyDefault),
    @"go": @(UIReturnKeyGo),
    @"google": @(UIReturnKeyGoogle),
    @"join": @(UIReturnKeyJoin),
    @"next": @(UIReturnKeyNext),
    @"route": @(UIReturnKeyRoute),
    @"search": @(UIReturnKeySearch),
    @"send": @(UIReturnKeySend),
    @"yahoo": @(UIReturnKeyYahoo),
    @"done": @(UIReturnKeyDone),
    @"emergency-call": @(UIReturnKeyEmergencyCall)
}),
UIReturnKeyDefault, integerValue)

HP_ENUM_CONVERTER(UIViewContentMode, (@{
    @"scale-to-fill": @(UIViewContentModeScaleToFill),
    @"scale-aspect-fit": @(UIViewContentModeScaleAspectFit),
    @"scale-aspect-fill": @(UIViewContentModeScaleAspectFill),
    @"redraw": @(UIViewContentModeRedraw),
    @"center": @(UIViewContentModeCenter),
    @"top": @(UIViewContentModeTop),
    @"bottom": @(UIViewContentModeBottom),
    @"left": @(UIViewContentModeLeft),
    @"right": @(UIViewContentModeRight),
    @"top-left": @(UIViewContentModeTopLeft),
    @"top-right": @(UIViewContentModeTopRight),
    @"bottom-left": @(UIViewContentModeBottomLeft),
    @"bottom-right": @(UIViewContentModeBottomRight),
    // Cross-platform values
    @"cover": @(UIViewContentModeScaleAspectFill),
    @"contain": @(UIViewContentModeScaleAspectFit),
    @"stretch": @(UIViewContentModeScaleToFill),
}),
UIViewContentModeScaleAspectFill, integerValue)

HP_ENUM_CONVERTER(UIBarStyle, (@{
    @"default": @(UIBarStyleDefault),
    @"black": @(UIBarStyleBlack),
}),
UIBarStyleDefault, integerValue)

static void HPConvertCGStructValue(__unused const char *type, NSArray *fields, NSDictionary *aliases, CGFloat *result, id json) {
    NSUInteger count = fields.count;
    if ([json isKindOfClass:[NSArray class]]) {
        if (HP_DEBUG && [json count] != count) {
            HPLogError(@"Expected array with count %lu, but count is %lu: %@", (unsigned long)count, (unsigned long)[json count], json);
        } else {
            for (NSUInteger i = 0; i < count; i++) {
                result[i] = [HPConvert CGFloat:json[i]];
            }
        }
    } else if ([json isKindOfClass:[NSDictionary class]]) {
        if (aliases.count) {
            json = [json mutableCopy];
            for (NSString *alias in aliases) {
                NSString *key = aliases[alias];
                NSNumber *number = json[alias];
                if (number != nil) {
                    HPLogWarn(@"Using deprecated '%@' property for '%s'. Use '%@' instead.", alias, type, key);
                    ((NSMutableDictionary *)json)[key] = number;
                }
            }
        }
        for (NSUInteger i = 0; i < count; i++) {
            result[i] = [HPConvert CGFloat:json[fields[i]]];
        }
    } else if (json) {
        HPLogConvertError(json, @(type));
    }
}

/**
 * This macro is used for creating converter functions for structs that consist
 * of a number of CGFloat properties, such as CGPoint, CGRect, etc.
 */
#define HP_CGSTRUCT_CONVERTER(type, values, aliases)                             \
    +(type)type : (id)json {                                                                \
        static NSArray *fields;                                                             \
        static dispatch_once_t onceToken;                                                   \
        dispatch_once(&onceToken, ^{                                                        \
            fields = values;                                                                \
        });                                                                                 \
        type result;                                                                        \
        HPConvertCGStructValue(#type, fields, aliases, (CGFloat *)&result, json); \
        return result;                                                                      \
    }

HP_CUSTOM_CONVERTER(CGFloat, CGFloat, [self double:json])
HP_CGSTRUCT_CONVERTER(CGPoint, (@[@"x", @"y"]), (@{ @"l": @"x", @"t": @"y" }))
HP_CGSTRUCT_CONVERTER(CGSize, (@[@"width", @"height"]), (@{ @"w": @"width", @"h": @"height" }))
HP_CGSTRUCT_CONVERTER(CGRect, (@[@"x", @"y", @"width", @"height"]), (@{ @"l": @"x", @"t": @"y", @"w": @"width", @"h": @"height" }))
HP_CGSTRUCT_CONVERTER(UIEdgeInsets, (@[@"top", @"left", @"bottom", @"right"]), nil)
HP_ENUM_CONVERTER(CGLineJoin, (@{
    @"miter": @(kCGLineJoinMiter),
    @"round": @(kCGLineJoinRound),
    @"bevel": @(kCGLineJoinBevel),
}),
kCGLineJoinMiter, intValue)

HP_ENUM_CONVERTER(CGLineCap, (@{
    @"butt": @(kCGLineCapButt),
    @"round": @(kCGLineCapRound),
    @"square": @(kCGLineCapSquare),
    }),
kCGLineCapButt, intValue)

    // HP_CGSTRUCT_CONVERTER(CATransform3D, (@[
    //  @"m11", @"m12", @"m13", @"m14",
    //  @"m21", @"m22", @"m23", @"m24",
    //  @"m31", @"m32", @"m33", @"m34",
    //  @"m41", @"m42", @"m43", @"m44"
    //]), nil)

HP_CGSTRUCT_CONVERTER(CGAffineTransform, (@[@"a", @"b", @"c", @"d", @"tx", @"ty"]), nil)

+ (UIColor *)UIColor : (id)json {
    if (!json) {
        return nil;
    }
    if ([json isKindOfClass:[NSArray class]]) {
        NSArray *components = [self NSNumberArray:json];
        CGFloat alpha = components.count > 3 ? [self CGFloat:components[3]] : 1.0;
        return [UIColor colorWithRed:[self CGFloat:components[0]] green:[self CGFloat:components[1]] blue:[self CGFloat:components[2]] alpha:alpha];
    } else if ([json isKindOfClass:[NSNumber class]]) {
        NSUInteger argb = [self NSUInteger:json];
        CGFloat a = ((argb >> 24) & 0xFF) / 255.0;
        CGFloat r = ((argb >> 16) & 0xFF) / 255.0;
        CGFloat g = ((argb >> 8) & 0xFF) / 255.0;
        CGFloat b = (argb & 0xFF) / 255.0;
        return [UIColor colorWithRed:r green:g blue:b alpha:a];
    } else {
        HPLogConvertError(json, @"a UIColor. Did you forget to call processColor() on the JS side?");
        return nil;
    }
}

+ (CGColorRef)CGColor:(id)json {
    return [self UIColor:json].CGColor;
}

NSArray *HPConvertArrayValue(SEL type, id json) {
    __block BOOL copy = NO;
    __block NSArray *values = json = [HPConvert NSArray:json];
    if ([values isKindOfClass:[NSArray class]]) {
        [json enumerateObjectsUsingBlock:^(id jsonValue, NSUInteger idx, __unused BOOL *stop) {
            id value = ((id(*)(Class, SEL, id))objc_msgSend)([HPConvert class], type, jsonValue);
            if (copy) {
                if (value) {
                    [(NSMutableArray *)values addObject:value];
                }
            } else if (value != jsonValue) {
                // Converted value is different, so we'll need to copy the array
                values = [[NSMutableArray alloc] initWithCapacity:values.count];
                for (NSUInteger i = 0; i < idx; i++) {
                    [(NSMutableArray *)values addObject:json[i]];
                }
                if (value) {
                    [(NSMutableArray *)values addObject:value];
                }
                copy = YES;
            }
        }];
        return values;
    } else {
        return nil;
    }
}

SEL HPConvertSelectorForType(NSString *type) {
    const char *input = type.UTF8String;
    return NSSelectorFromString([HPParseType(&input) stringByAppendingString:@":"]);
}

HP_ARRAY_CONVERTER(NSURL)
HP_ARRAY_CONVERTER(UIColor)

/**
 * This macro is used for creating converter functions for directly
 * representable json array values that require no conversion.
 */
#if HP_DEBUG
#define HP_JSON_ARRAY_CONVERTER(type) HP_ARRAY_CONVERTER(type)
#else
#define HP_JSON_ARRAY_CONVERTER(type)    \
    +(NSArray *)type##Array : (id)json {            \
        return json;                                \
    }
#endif

HP_JSON_ARRAY_CONVERTER(NSArray)
HP_JSON_ARRAY_CONVERTER(NSString)
+ (NSArray<NSArray<NSString *> *> *)NSStringArrayArray : (id)json {
    return HPConvertArrayValue(@selector(NSStringArray:), json);
}
HP_JSON_ARRAY_CONVERTER(NSDictionary)
HP_JSON_ARRAY_CONVERTER(NSNumber)

// Can't use HP_ARRAY_CONVERTER due to bridged cast
+ (NSArray *)CGColorArray : (id)json {
    NSMutableArray *colors = [NSMutableArray new];
    for (id value in [self NSArray:json]) {
        [colors addObject:(__bridge id)[self CGColor:value]];
    }
    return colors;
}

static id HPConvertPropertyListValue(id json) {
    if (!json || json == (id)kCFNull) {
        return nil;
    }

    if ([json isKindOfClass:[NSDictionary class]]) {
        __block BOOL copy = NO;
        NSMutableDictionary *values = [[NSMutableDictionary alloc] initWithCapacity:[json count]];
        [json enumerateKeysAndObjectsUsingBlock:^(NSString *key, id jsonValue, __unused BOOL *stop) {
            id value = HPConvertPropertyListValue(jsonValue);
            if (value) {
                values[key] = value;
            }
            copy |= value != jsonValue;
        }];
        return copy ? values : json;
    }

    if ([json isKindOfClass:[NSArray class]]) {
        __block BOOL copy = NO;
        __block NSArray *values = json;
        [json enumerateObjectsUsingBlock:^(id jsonValue, NSUInteger idx, __unused BOOL *stop) {
            id value = HPConvertPropertyListValue(jsonValue);
            if (copy) {
                if (value) {
                    [(NSMutableArray *)values addObject:value];
                }
            } else if (value != jsonValue) {
                // Converted value is different, so we'll need to copy the array
                values = [[NSMutableArray alloc] initWithCapacity:values.count];
                for (NSUInteger i = 0; i < idx; i++) {
                    [(NSMutableArray *)values addObject:json[i]];
                }
                if (value) {
                    [(NSMutableArray *)values addObject:value];
                }
                copy = YES;
            }
        }];
        return values;
    }

    // All other JSON types are supported by property lists
    return json;
}

+ (NSPropertyList)NSPropertyList:(id)json {
    return HPConvertPropertyListValue(json);
}

HP_ENUM_CONVERTER(css_backface_visibility_t, (@{ @"hidden": @NO, @"visible": @YES }), YES, boolValue)

@end