// Copyright (c) 2014-2016 Thomas Fussell
// Copyright (c) 2010-2015 openpyxl
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// 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 AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, WRISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE
//
// @license: http://www.opensource.org/licenses/mit-license.php
// @author: see AUTHORS file

#include <cmath> // for std::fabs

#include <xlnt/styles/fill.hpp>

namespace xlnt {

// pattern_fill

pattern_fill::pattern_fill()
{
}

pattern_fill_type pattern_fill::type() const
{
    return type_;
}

pattern_fill &pattern_fill::type(pattern_fill_type type)
{
    type_ = type;
    return *this;
}

optional<color> pattern_fill::foreground() const
{
    return foreground_;
}

pattern_fill &pattern_fill::foreground(const color &new_foreground)
{
    foreground_ = new_foreground;

    if (!background_)
    {
        background_.set(indexed_color(64));
    }

    return *this;
}

optional<color> pattern_fill::background() const
{
    return background_;
}

pattern_fill &pattern_fill::background(const color &new_background)
{
    background_ = new_background;
    return *this;
}

XLNT_API bool operator==(const pattern_fill &left, const pattern_fill &right)
{
    if (left.background().is_set() != right.background().is_set())
    {
        return false;
    }

    if (left.background().is_set())
    {
        if (left.background().get() != right.background().get())
        {
            return false;
        }
    }

    if (left.foreground().is_set() != right.foreground().is_set())
    {
        return false;
    }

    if (left.foreground().is_set())
    {
        if (left.foreground().get() != right.foreground().get())
        {
            return false;
        }
    }

    if (left.type() != right.type())
    {
        return false;
    }

    return true;
}

// gradient_fill

gradient_fill::gradient_fill()
    : type_(gradient_fill_type::linear)
{
}

gradient_fill_type gradient_fill::type() const
{
    return type_;
}

gradient_fill &gradient_fill::type(gradient_fill_type t)
{
    type_ = t;
    return *this;
}

gradient_fill &gradient_fill::degree(double degree)
{
    degree_ = degree;
    return *this;
}

double gradient_fill::degree() const
{
    return degree_;
}

double gradient_fill::left() const
{
    return left_;
}

gradient_fill &gradient_fill::left(double value)
{
    left_ = value;
    return *this;
}

double gradient_fill::right() const
{
    return right_;
}

gradient_fill &gradient_fill::right(double value)
{
    right_ = value;
    return *this;
}

double gradient_fill::top() const
{
    return top_;
}

gradient_fill &gradient_fill::top(double value)
{
    top_ = value;
    return *this;
}

double gradient_fill::bottom() const
{
    return bottom_;
}

gradient_fill &gradient_fill::bottom(double value)
{
    bottom_ = value;
    return *this;
}

gradient_fill &gradient_fill::add_stop(double position, color stop_color)
{
    stops_[position] = stop_color;
    return *this;
}

gradient_fill &gradient_fill::clear_stops()
{
    stops_.clear();
    return *this;
}

std::unordered_map<double, color> gradient_fill::stops() const
{
    return stops_;
}

XLNT_API bool operator==(const gradient_fill &left, const gradient_fill &right)
{
    if (left.type() != right.type())
    {
        return false;
    }

    if (std::fabs(left.degree() - right.degree()) != 0.)
    {
        return false;
    }

    if (std::fabs(left.bottom() - right.bottom()) != 0.)
    {
        return false;
    }

    if (std::fabs(left.right() - right.right()) != 0.)
    {
        return false;
    }

    if (std::fabs(left.top() - right.top()) != 0.)
    {
        return false;
    }

    if (std::fabs(left.left() - right.left()) != 0.)
    {
        return false;
    }

    if (left.stops() != right.stops())
    {
        return false;
    }

    return true;
}

// fill

fill fill::solid(const color &fill_color)
{
    return fill(
        xlnt::pattern_fill().type(xlnt::pattern_fill_type::solid).foreground(fill_color).background(indexed_color(64)));
}

fill::fill()
    : type_(fill_type::pattern)
{
}

fill::fill(const xlnt::pattern_fill &pattern)
    : type_(fill_type::pattern), pattern_(pattern)
{
}

fill::fill(const xlnt::gradient_fill &gradient)
    : type_(fill_type::gradient), gradient_(gradient)
{
}

fill_type fill::type() const
{
    return type_;
}

gradient_fill fill::gradient_fill() const
{
    if (type_ != fill_type::gradient)
    {
        throw invalid_attribute();
    }

    return gradient_;
}

pattern_fill fill::pattern_fill() const
{
    if (type_ != fill_type::pattern)
    {
        throw invalid_attribute();
    }

    return pattern_;
}

XLNT_API bool operator==(const fill &left, const fill &right)
{
    if (left.type() != right.type())
    {
        return false;
    }

    if (left.type() == fill_type::gradient)
    {
        return left.gradient_fill() == right.gradient_fill();
    }

    return left.pattern_fill() == right.pattern_fill();
}

} // namespace xlnt