/**
License:
    Boost Software License - Version 1.0 - August 17th, 2003

    Permission is hereby granted, free of charge, to any person or organization
    obtaining a copy of the software and accompanying documentation covered by
    this license (the "Software") to use, reproduce, display, distribute,
    execute, and transmit the Software, and to prepare derivative works of the
    Software, and to permit third-parties to whom the Software is furnished to
    do so, all subject to the following:

    The copyright notices in the Software and this entire statement, including
    the above license grant, this restriction and the following disclaimer,
    must be included in all copies of the Software, in whole or in part, and
    all derivative works of the Software, unless such copies or derivative
    works are solely in the form of machine-executable object code generated by
    a source language processor.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
    SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
    FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
    ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    DEALINGS IN THE SOFTWARE.

Authors:
    Alexandru Ermicioi
**/
module aermicioi.aedi_property_reader.convertor.std_conv;

import std.conv : to, ConvException, text;
import std.exception : enforce;
import std.typecons : Flag, Yes;
import std.traits : isSomeString;
import std.experimental.allocator;
import aermicioi.aedi_property_reader.convertor.convertor;
import aermicioi.aedi_property_reader.convertor.exception : ConvertorException;
import aermicioi.aedi_property_reader.convertor.placeholder;
import aermicioi.aedi_property_reader.convertor.mapper;
import aermicioi.aedi_property_reader.convertor.accessor;
import aermicioi.aedi_property_reader.convertor.setter;
import aermicioi.aedi_property_reader.convertor.inspector;

/**
Convert from component to component using std.conv.to family of functions.

Params:
    from = original component to be converted
    to = resulting component
    allocator = ignored allocator as .to family of functions are not using allocators
Throws:
    See std.conv.to for throwed exceptions
**/
void convert(To, From)(From from, ref To to, RCIAllocator allocator = theAllocator) {
    to = from.to!To;
}

/**
Destruct to component.

Params:
    to = component to destroy
    allocator = ignored allocator as .to family of functions doesn't use allocators yet.
**/
void destruct(To)(ref To to, RCIAllocator allocator = theAllocator) {
    destroy(to);
    to = To.init;
}

public {
    alias AssociativeArrayAccessorFactory(T) = AssociativeArrayAccessor!(T[]);
    alias AssociativeArrayInspectorFactory(T) = AssociativeArrayInspector!T;
    alias AssociativeArraySetterFactory(T) = AssociativeArraySetter!T;
}

class StdConvConvertor(To, From) : Convertor {

    mixin ConvertsFromToMixin!(From, To) DefaultImplementation;
    mixin EqualToHashToStringOpCmpMixin;

    /**
    ditto
    **/
    bool converts(in Object from, const TypeInfo to) @safe const nothrow {
        if (DefaultImplementation.converts(from, to)) {
            try {
                cast(void) from.unwrap!From.to!To;
                return true;
            } catch (Exception e) {

                return false;
            }
        }

        return false;
    }

    /**
    ditto
    **/
    bool converts(in Object from, in Object to) @safe const nothrow {
        return this.converts(from, to.identify);
    }

    /**
    Convert from component to component.

    Params:
        from = original component that is to be converted.
        to = destination object that will be constructed out for original one.
        allocator = optional allocator that could be used to construct to component.
    Throws:
        ConvertorException when there is a converting error
        InvalidArgumentException when arguments passed are not of right type or state
    Returns:
        Resulting converted component.
    **/
    Object convert(in Object from, const TypeInfo to, RCIAllocator allocator = theAllocator) const {
        enforce!ConvertorException(this.converts(from, to), text("Cannot convert ", from.identify, " to ", to, " expected origin of ", this.from, " and destination of ", this.to, ", or the input contains wrong information which does not match destination type."));

        return from.unwrap!From.to!To.pack(from, this, allocator);
    }

    /**
    Destroy component created using this convertor.

    Destroy component created using this convertor.
    Since convertor could potentially allocate memory for
    converted component, only itself is containing history of allocation,
    and therefore it is responsible as well to destroy and free allocated
    memory with allocator.

    Params:
        converted = component that should be destroyed.
        allocator = allocator used to allocate converted component.
    **/
    void destruct(const TypeInfo from, ref Object converted, RCIAllocator allocator = theAllocator) const {
        enforce!ConvertorException(this.destroys(from, converted), text("Cannot destroy component of type ", to, " expected type of ", this.to));

        auto unpacked = converted.unpack!To;
        destroy(unpacked);
    }
}

class StringStripperConvertor(StringType) : Convertor
    if (isSomeString!StringType) {

    mixin ConvertsFromToMixin!(StringType, StringType) DefaultImplementation;
    mixin EqualToHashToStringOpCmpMixin;

    /**
    Convert from component to component.

    Params:
        from = original component that is to be converted.
        to = destination object that will be constructed out for original one.
        allocator = optional allocator that could be used to construct to component.
    Throws:
        ConvertorException when there is a converting error
        InvalidArgumentException when arguments passed are not of right type or state
    Returns:
        Resulting converted component.
    **/
    Object convert(in Object from, const TypeInfo to, RCIAllocator allocator = theAllocator) const {
        import std..string : strip;
        enforce!ConvertorException(this.converts(from, to), text("Cannot convert ", from.identify, " to ", to, " expected origin of ", this.from, " and destination of ", this.to));

        return from.unwrap!StringType.strip.pack(from, this, allocator);
    }

    /**
    Destroy component created using this convertor.

    Destroy component created using this convertor.
    Since convertor could potentially allocate memory for
    converted component, only itself is containing history of allocation,
    and therefore it is responsible as well to destroy and free allocated
    memory with allocator.

    Params:
        converted = component that should be destroyed.
        allocator = allocator used to allocate converted component.
    **/
    void destruct(const TypeInfo from, ref Object converted, RCIAllocator allocator = theAllocator) const {
        enforce!ConvertorException(this.destroys(from, converted), text("Cannot destroy component of type ", to, " expected type of ", this.to));

        auto unpacked = converted.unpack!StringType;
    }
}

auto StdConvStringPrebuiltConvertorsFactory(CombinedConvertor defaultConvertor, Flag!"trimStringForNumbers" trimStringForNumbers = Yes.trimStringForNumbers) {
    import std.meta;

    if (trimStringForNumbers) {
        import std..string : strip;
        import aermicioi.aedi_property_reader.convertor.chaining_convertor : ChainedConvertor;
        static foreach (FromType; StringConvertibleTypes) {
            static foreach (ToType; AliasSeq!(ScalarConvertibleTypes)) {
                defaultConvertor.add(
                    new ChainedConvertor(
                        new StringStripperConvertor!FromType,
                        new StdConvConvertor!(ToType, FromType)
                    )
                );
            }
        }
    } else {
        static foreach (FromType; StringConvertibleTypes) {
            static foreach (ToType; ScalarConvertibleTypes) {
                defaultConvertor.add(new StdConvConvertor!(ToType, FromType));
            }
        }
    }

    static foreach (FromType; StringConvertibleTypes) {
        static foreach (ToType; StringConvertibleTypes) {
            defaultConvertor.add(new StdConvConvertor!(ToType, FromType));
        }
    }

    static foreach (FromType; ScalarConvertibleTypes) {
        static foreach (ToType; AliasSeq!(ScalarConvertibleTypes, StringConvertibleTypes)) {
            defaultConvertor.add(new StdConvConvertor!(ToType, FromType));
        }
    }

    static foreach (FromType; AliasSeq!(StringConvertibleTypes, ScalarArrayConvertibleTypes)) {
        static foreach (ToType; AliasSeq!(StringConvertibleTypes, ScalarArrayConvertibleTypes)) {
            defaultConvertor.add(new StdConvConvertor!(ToType, FromType));
        }
    }

    static foreach (FromType; AliasSeq!(StringConvertibleTypes, StringArrayConvertibleTypes)) {
        static foreach (ToType; AliasSeq!(StringConvertibleTypes, StringArrayConvertibleTypes)) {
            defaultConvertor.add(new StdConvConvertor!(ToType, FromType));
        }
    }

    static foreach (FromType; AliasSeq!(StringConvertibleTypes, MapConvertibleTypes)) {
        static foreach (ToType; AliasSeq!(StringConvertibleTypes, MapConvertibleTypes)) {
            defaultConvertor.add(new StdConvConvertor!(ToType, FromType));
        }
    }

    defaultConvertor.add(new RangeToArrayConvertor!(dstring[], string[])(defaultConvertor));
};