// 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 <algorithm>
#include <unordered_set>

#include <xlnt/packaging/manifest.hpp>
#include <xlnt/utils/exceptions.hpp>

namespace xlnt {

void manifest::clear()
{
    default_content_types_.clear();
    override_content_types_.clear();
    relationships_.clear();
}

path manifest::canonicalize(const std::vector<relationship> &rels) const
{
    xlnt::path relative;

    for (auto component : rels)
    {
        if (component == rels.back())
        {
            relative = relative.append(component.get_target().get_path());
        }
        else
        {
            relative = relative.append(component.get_target().get_path().parent());
        }
    }

    std::vector<std::string> absolute_parts;

    for (const auto &component : relative.split())
    {
        if (component == ".") continue;

        if (component == "..")
        {
            absolute_parts.pop_back();
            continue;
        }
        
        absolute_parts.push_back(component);
    }
    
    xlnt::path result;
    
    for (const auto &component : absolute_parts)
    {
        result = result.append(component);
    }
    
    return result;
}

bool manifest::has_relationship(const path &part, relationship::type type) const
{
    if (relationships_.find(part) == relationships_.end()) return false;

    for (const auto &rel : relationships_.at(part))
    {
        if (rel.second.get_type() == type) return true;
    }
    
    return false;
}

relationship manifest::get_relationship(const path &part, relationship::type type) const
{
    if (relationships_.find(part) == relationships_.end()) throw key_not_found();

    for (const auto &rel : relationships_.at(part))
    {
        if (rel.second.get_type() == type) return rel.second;
    }
    
	throw key_not_found();
}

std::vector<relationship> manifest::get_relationships(const path &part, relationship::type type) const
{
	std::vector<relationship> matches;

    for (const auto &rel : relationships_.at(part))
    {
        if (rel.second.get_type() == type)
        {
            matches.push_back(rel.second);
        }
    }

	return matches;
}

std::string manifest::get_content_type(const path &part) const
{
	auto absolute = part.resolve(path("/"));

    if (has_override_type(absolute))
    {
        return get_override_type(absolute);
    }
    
    if (has_default_type(part.extension()))
    {
        return get_default_type(part.extension());
    }
    
    throw key_not_found();
}

void manifest::register_override_type(const path &part, const std::string &content_type)
{
    override_content_types_[part] = content_type;
}

void manifest::unregister_override_type(const path &part)
{
	override_content_types_.erase(part);
}

std::vector<path> manifest::get_parts_with_overriden_types() const
{
	std::vector<path> overriden;

	for (const auto &part : override_content_types_)
	{
        overriden.push_back(part.first);
	}

	return overriden;
}

std::vector<relationship> manifest::get_relationships(const path &part) const
{
	if (relationships_.find(part) == relationships_.end())
	{
		return {};
	}

    std::vector<relationship> relationships;

    for (const auto &rel : relationships_.at(part))
    {
        relationships.push_back(rel.second);
    }
    
	return relationships;
}

relationship manifest::get_relationship(const path &part, const std::string &rel_id) const
{
	if (relationships_.find(part) == relationships_.end())
	{
		throw key_not_found();
	}

	for (const auto &rel : relationships_.at(part))
	{
		if (rel.second.get_id() == rel_id)
		{
			return rel.second;
		}
	}

	throw key_not_found();
}

std::vector<path> manifest::get_parts() const
{
	std::unordered_set<path> parts;

	for (const auto &part_rels : relationships_)
	{
        parts.insert(part_rels.first);
        
        for (const auto &rel : part_rels.second)
        {
            if (rel.second.get_target_mode() == target_mode::internal)
            {
                parts.insert(rel.second.get_target().get_path());
            }
        }
	}

	return std::vector<path>(parts.begin(), parts.end());
}

std::string manifest::register_relationship(const uri &source, relationship::type type, const uri &target, target_mode mode)
{
	return register_relationship(source, type, target, mode, next_relationship_id(source.get_path()));
}

std::string manifest::register_relationship(const uri &source, relationship::type type, const uri &target, target_mode mode, const std::string &rel_id)
{
    relationships_[source.get_path()][rel_id] = relationship(rel_id, type, source, target, mode);
	return rel_id;
}

void manifest::unregister_relationship(const uri &source, const std::string &rel_id)
{
	relationships_.at(source.get_path()).erase(rel_id);
}

bool manifest::has_default_type(const std::string &extension) const
{
	return default_content_types_.find(extension) != default_content_types_.end();
}

std::vector<std::string> manifest::get_extensions_with_default_types() const
{
	std::vector<std::string> extensions;

	for (const auto &extension_type_pair : default_content_types_)
	{
		extensions.push_back(extension_type_pair.first);
	}

	return extensions;
}

std::string manifest::get_default_type(const std::string &extension) const
{
	if (default_content_types_.find(extension) == default_content_types_.end())
	{
		throw key_not_found();
	}

	return default_content_types_.at(extension);
}

void manifest::register_default_type(const std::string &extension, const std::string &content_type)
{
	default_content_types_[extension] = content_type;
}

void manifest::unregister_default_type(const std::string &extension)
{
	default_content_types_.erase(extension);
}

std::string manifest::next_relationship_id(const path &part) const
{
    if (relationships_.find(part) == relationships_.end()) return "rId1";

	std::size_t index = 1;
	const auto &part_rels = relationships_.at(part);

	while (part_rels.find("rId" + std::to_string(index)) != part_rels.end())
	{
		++index;
	}

	return "rId" + std::to_string(index);
}

bool manifest::has_override_type(const xlnt::path &part) const
{
    return override_content_types_.find(part) != override_content_types_.end();
}

std::string manifest::get_override_type(const xlnt::path &part) const
{
    if (!has_override_type(part))
    {
        throw key_not_found();
    }
    
    return override_content_types_.at(part);
}

} // namespace xlnt