/*
 * argument_matchers.hpp
 * Copyright (c) 2014 Eran Pe'er.
 *
 * This program is made available under the terms of the MIT License.
 * 
 * Created on Jan 12, 2015
 */
#pragma once

namespace fakeit {

    struct IMatcher : public Destructible {
        virtual std::string format() const = 0;
    };

    template<typename T>
    struct TypedMatcher : public IMatcher {
        virtual bool matches(const T &actual) const = 0;
    };

    template<typename T>
    struct TypedMatcherCreator {

        virtual ~TypedMatcherCreator() = default;

        virtual TypedMatcher<T> *createMatcher() const = 0;
    };

    template<typename T>
    struct ComparisonMatcherCreator : public TypedMatcherCreator<T> {

        virtual ~ComparisonMatcherCreator() = default;

        ComparisonMatcherCreator(const T &arg)
                : _expected(arg) {
        }

        struct Matcher : public TypedMatcher<T> {
            Matcher(const T &expected)
                    : _expected(expected) {
            }

            const T _expected;
        };

        const T &_expected;
    };

    namespace internal {
        template<typename T>
        struct TypedAnyMatcher : public TypedMatcherCreator<T> {

            virtual ~TypedAnyMatcher() = default;

            TypedAnyMatcher() {
            }

            struct Matcher : public TypedMatcher<T> {
                virtual bool matches(const T &) const {
                    return true;
                }

                virtual std::string format() const override {
                    return "Any";
                }
            };

            virtual TypedMatcher<T> *createMatcher() const override {
                return new Matcher();
            }

        };

        template<typename T>
        struct EqMatcherCreator : public ComparisonMatcherCreator<T> {

            virtual ~EqMatcherCreator() = default;

            EqMatcherCreator(const T &expected)
                    : ComparisonMatcherCreator<T>(expected) {
            }

            struct Matcher : public ComparisonMatcherCreator<T>::Matcher {
                Matcher(const T &expected)
                        : ComparisonMatcherCreator<T>::Matcher(expected) {
                }

                virtual std::string format() const override {
                    return Formatter<T>::format(this->_expected);
                }

                virtual bool matches(const T &actual) const override {
                    return actual == this->_expected;
                }
            };

            virtual TypedMatcher<T> *createMatcher() const {
                return new Matcher(this->_expected);
            }

        };

        template<typename T>
        struct GtMatcherCreator : public ComparisonMatcherCreator<T> {

            virtual ~GtMatcherCreator() = default;

            GtMatcherCreator(const T &expected)
                    : ComparisonMatcherCreator<T>(expected) {
            }

            struct Matcher : public ComparisonMatcherCreator<T>::Matcher {
                Matcher(const T &expected)
                        : ComparisonMatcherCreator<T>::Matcher(expected) {
                }

                virtual bool matches(const T &actual) const override {
                    return actual > this->_expected;
                }

                virtual std::string format() const override {
                    return std::string(">") + Formatter<T>::format(this->_expected);
                }
            };

            virtual TypedMatcher<T> *createMatcher() const override {
                return new Matcher(this->_expected);
            }
        };

        template<typename T>
        struct GeMatcherCreator : public ComparisonMatcherCreator<T> {

            virtual ~GeMatcherCreator() = default;

            GeMatcherCreator(const T &expected)
                    : ComparisonMatcherCreator<T>(expected) {
            }

            struct Matcher : public ComparisonMatcherCreator<T>::Matcher {
                Matcher(const T &expected)
                        : ComparisonMatcherCreator<T>::Matcher(expected) {
                }

                virtual bool matches(const T &actual) const override {
                    return actual >= this->_expected;
                }

                virtual std::string format() const override {
                    return std::string(">=") + Formatter<T>::format(this->_expected);
                }
            };

            virtual TypedMatcher<T> *createMatcher() const override {
                return new Matcher(this->_expected);
            }
        };

        template<typename T>
        struct LtMatcherCreator : public ComparisonMatcherCreator<T> {

            virtual ~LtMatcherCreator() = default;

            LtMatcherCreator(const T &expected)
                    : ComparisonMatcherCreator<T>(expected) {
            }

            struct Matcher : public ComparisonMatcherCreator<T>::Matcher {
                Matcher(const T &expected)
                        : ComparisonMatcherCreator<T>::Matcher(expected) {
                }

                virtual bool matches(const T &actual) const override {
                    return actual < this->_expected;
                }

                virtual std::string format() const override {
                    return std::string("<") + Formatter<T>::format(this->_expected);
                }
            };

            virtual TypedMatcher<T> *createMatcher() const override {
                return new Matcher(this->_expected);
            }

        };

        template<typename T>
        struct LeMatcherCreator : public ComparisonMatcherCreator<T> {

            virtual ~LeMatcherCreator() = default;

            LeMatcherCreator(const T &expected)
                    : ComparisonMatcherCreator<T>(expected) {
            }

            struct Matcher : public ComparisonMatcherCreator<T>::Matcher {
                Matcher(const T &expected)
                        : ComparisonMatcherCreator<T>::Matcher(expected) {
                }

                virtual bool matches(const T &actual) const override {
                    return actual <= this->_expected;
                }

                virtual std::string format() const override {
                    return std::string("<=") + Formatter<T>::format(this->_expected);
                }
            };

            virtual TypedMatcher<T> *createMatcher() const override {
                return new Matcher(this->_expected);
            }

        };

        template<typename T>
        struct NeMatcherCreator : public ComparisonMatcherCreator<T> {

            virtual ~NeMatcherCreator() = default;

            NeMatcherCreator(const T &expected)
                    : ComparisonMatcherCreator<T>(expected) {
            }

            struct Matcher : public ComparisonMatcherCreator<T>::Matcher {
                Matcher(const T &expected)
                        : ComparisonMatcherCreator<T>::Matcher(expected) {
                }

                virtual bool matches(const T &actual) const override {
                    return actual != this->_expected;
                }

                virtual std::string format() const override {
                    return std::string("!=") + Formatter<T>::format(this->_expected);
                }

            };

            virtual TypedMatcher<T> *createMatcher() const override {
                return new Matcher(this->_expected);
            }

        };
    }

    struct AnyMatcher {
    } static _;

    template<typename T>
    internal::TypedAnyMatcher<T> Any() {
        internal::TypedAnyMatcher<T> rv;
        return rv;
    }

    template<typename T>
    internal::EqMatcherCreator<T> Eq(const T &arg) {
        internal::EqMatcherCreator<T> rv(arg);
        return rv;
    }

    template<typename T>
    internal::GtMatcherCreator<T> Gt(const T &arg) {
        internal::GtMatcherCreator<T> rv(arg);
        return rv;
    }

    template<typename T>
    internal::GeMatcherCreator<T> Ge(const T &arg) {
        internal::GeMatcherCreator<T> rv(arg);
        return rv;
    }

    template<typename T>
    internal::LtMatcherCreator<T> Lt(const T &arg) {
        internal::LtMatcherCreator<T> rv(arg);
        return rv;
    }

    template<typename T>
    internal::LeMatcherCreator<T> Le(const T &arg) {
        internal::LeMatcherCreator<T> rv(arg);
        return rv;
    }

    template<typename T>
    internal::NeMatcherCreator<T> Ne(const T &arg) {
        internal::NeMatcherCreator<T> rv(arg);
        return rv;
    }

}