#include "scrapers/ScreenScraper.h"

#include "utils/TimeUtil.h"
#include "utils/StringUtil.h"
#include "FileData.h"
#include "Log.h"
#include "PlatformId.h"
#include "Settings.h"
#include "SystemData.h"
#include <pugixml/src/pugixml.hpp>
#include <cstring>

using namespace PlatformIds;

/**
	List of systems and their IDs from
	https://www.screenscraper.fr/api/systemesListe.php?devid=xxx&devpassword=yyy&softname=zzz&output=XML
**/
const std::map<PlatformId, unsigned short> screenscraper_platformid_map{
	{ THREEDO, 29 },
	{ AMIGA, 64 },
	{ AMSTRAD_CPC, 65 },
	{ APPLE_II, 86 },
	{ ARCADE, 75 },
	{ ATARI_800, 26 }, // Use ATARI_2600 as an alias for atari 800
	{ ATARI_2600, 26 },
	{ ATARI_5200, 40 },
	{ ATARI_7800, 41 },
	{ ATARI_JAGUAR, 27 },
	{ ATARI_JAGUAR_CD, 171 },
	{ ATARI_LYNX, 28 },
	{ ATARI_ST, 42},
	// missing Atari XE ?
	{ COLECOVISION, 48 },
	{ COMMODORE_64, 66 },
	{ INTELLIVISION, 115 },
	{ MAC_OS, 146 },
	{ XBOX, 32 },
	{ XBOX_360, 33 },
	{ MSX, 113 },
	{ NEOGEO, 142 },
	{ NEOGEO_POCKET, 25},
	{ NEOGEO_POCKET_COLOR, 82 },
	{ NINTENDO_3DS, 17 },
	{ NINTENDO_64, 14 },
	{ NINTENDO_DS, 15 },
	{ FAMICOM_DISK_SYSTEM, 106 },
	{ NINTENDO_ENTERTAINMENT_SYSTEM, 3 },
	{ GAME_BOY, 9 },
	{ GAME_BOY_ADVANCE, 12 },
	{ GAME_BOY_COLOR, 10 },
	{ NINTENDO_GAMECUBE, 13 },
	{ NINTENDO_WII, 16 },
	{ NINTENDO_WII_U, 18 },
	{ NINTENDO_VIRTUAL_BOY, 11 },
	{ NINTENDO_GAME_AND_WATCH, 52 },
	{ PC, 135 },
	{ SCUMMVM, 123},
	{ SEGA_32X, 19 },
	{ SEGA_CD, 20 },
	{ SEGA_DREAMCAST, 23 },
	{ SEGA_GAME_GEAR, 21 },
	{ SEGA_GENESIS, 1 },
	{ SEGA_MASTER_SYSTEM, 2 },
	{ SEGA_MEGA_DRIVE, 1 },
	{ SEGA_SATURN, 22 },
	{ SEGA_SG1000, 109 },
	{ SHARP_X6800, 79},
	{ PLAYSTATION, 57 },
	{ PLAYSTATION_2, 58 },
	{ PLAYSTATION_3, 59 },
	// missing Sony Playstation 4 ?
	{ PLAYSTATION_VITA, 62 },
	{ PLAYSTATION_PORTABLE, 61 },
	{ SUPER_NINTENDO, 4 },
	{ TURBOGRAFX_16, 31 },
	{ TURBOGRAFX_CD, 114 },
	{ WONDERSWAN, 45 },
	{ WONDERSWAN_COLOR, 46 },
	{ ZX_SPECTRUM, 76 },
	{ VIDEOPAC_ODYSSEY2, 104 },
	{ VECTREX, 102 },
	{ TRS80_COLOR_COMPUTER, 144 },
	{ TANDY, 144 }
};


// Helper XML parsing method, finding a node-by-name recursively.
pugi::xml_node find_node_by_name_re(const pugi::xml_node& node, const std::vector<std::string> node_names) {

	for (const std::string& _val : node_names)
	{
		pugi::xpath_query query_node_name((static_cast<std::string>("//") + _val).c_str());
		pugi::xpath_node_set results = node.select_nodes(query_node_name);

		if (results.size() > 0)
			return results.first().node();
	}

	return pugi::xml_node();
}

// Help XML parsing method, finding an direct child XML node starting from the parent and filtering by an attribute value list.
pugi::xml_node find_child_by_attribute_list(const pugi::xml_node& node_parent, const std::string& node_name, const std::string& attribute_name, const std::vector<std::string> attribute_values)
{
	for (auto _val : attribute_values)
	{
		for (pugi::xml_node node : node_parent.children(node_name.c_str()))
		{

			if (strcmp(node.attribute(attribute_name.c_str()).value(), _val.c_str()) == 0)
				return node;
		}
	}

	return pugi::xml_node(NULL);

}

void screenscraper_generate_scraper_requests(const ScraperSearchParams& params,
	std::queue< std::unique_ptr<ScraperRequest> >& requests,
	std::vector<ScraperSearchResult>& results)
{
	std::string path;

	ScreenScraperRequest::ScreenScraperConfig ssConfig;

	path = ssConfig.getGameSearchUrl(params.game->getFileName());
	auto& platforms = params.system->getPlatformIds();

	for (auto platformIt = platforms.cbegin(); platformIt != platforms.cend(); platformIt++)
	{
		auto mapIt = screenscraper_platformid_map.find(*platformIt);

		if (mapIt != screenscraper_platformid_map.cend())
		{
			path += "&systemeid=";
			path += HttpReq::urlEncode(std::to_string(mapIt->second));
		}else{
			LOG(LogWarning) << "ScreenScraper: no support for platform " << getPlatformName(*platformIt);
		}

		requests.push(std::unique_ptr<ScraperRequest>(new ScreenScraperRequest(requests, results, path)));
	}

}

void ScreenScraperRequest::process(const std::unique_ptr<HttpReq>& req, std::vector<ScraperSearchResult>& results)
{
	assert(req->status() == HttpReq::REQ_SUCCESS);

	pugi::xml_document doc;
	pugi::xml_parse_result parseResult = doc.load(req->getContent().c_str());

	if (!parseResult)
	{
		std::stringstream ss;
		ss << "ScreenScraperRequest - Error parsing XML." << std::endl << parseResult.description() << "";

		std::string err = ss.str();
		setError(err);
		LOG(LogError) << err;

		return;
	}

	processGame(doc, results);

}


void ScreenScraperRequest::processGame(const pugi::xml_document& xmldoc, std::vector<ScraperSearchResult>& out_results)
{
	pugi::xml_node data = xmldoc.child("Data");
	pugi::xml_node game = data.child("jeu");

	if (game)
	{
		ScraperSearchResult result;
		ScreenScraperRequest::ScreenScraperConfig ssConfig;

		std::string region = Utils::String::toLower(ssConfig.region).c_str();
		std::string language = Utils::String::toLower(ssConfig.language).c_str();

		// Name fallback: US, WOR(LD). ( Xpath: Data/jeu[0]/noms/nom[*] ). 
		result.mdl.set("name", find_child_by_attribute_list(game.child("noms"), "nom", "region", { region, "wor", "us" , "ss", "eu", "jp" }).text().get());

		// Description fallback language: EN, WOR(LD)
		std::string description = find_child_by_attribute_list(game.child("synopsis"), "synopsis", "langue", { language, "en", "wor" }).text().get();

		if (!description.empty()) {
			result.mdl.set("desc", Utils::String::replace(description, "&nbsp;", " "));
		}

		// Genre fallback language: EN. ( Xpath: Data/jeu[0]/genres/genre[*] )
		result.mdl.set("genre", find_child_by_attribute_list(game.child("genres"), "genre", "langue", { language, "en" }).text().get());
		LOG(LogDebug) << "Genre: " << result.mdl.get("genre");

		// Get the date proper. The API returns multiple 'date' children nodes to the 'dates' main child of 'jeu'.
		// Date fallback: WOR(LD), US, SS, JP, EU
		std::string _date = find_child_by_attribute_list(game.child("dates"), "date", "region", { region, "wor", "us", "ss", "jp", "eu" }).text().get();
		LOG(LogDebug) << "Release Date (unparsed): " << _date;

		// Date can be YYYY-MM-DD or just YYYY.
		if (_date.length() > 4)
		{
			result.mdl.set("releasedate", Utils::Time::DateTime(Utils::Time::stringToTime(_date, "%Y-%m-%d")));
		} else if (_date.length() > 0)
		{
			result.mdl.set("releasedate", Utils::Time::DateTime(Utils::Time::stringToTime(_date, "%Y")));
		}

		LOG(LogDebug) << "Release Date (parsed): " << result.mdl.get("releasedate");

		/// Developer for the game( Xpath: Data/jeu[0]/developpeur )
		std::string developer = game.child("developpeur").text().get();
		if (!developer.empty())
			result.mdl.set("developer", Utils::String::replace(developer, "&nbsp;", " "));

		// Publisher for the game ( Xpath: Data/jeu[0]/editeur )
		std::string publisher = game.child("editeur").text().get();
		if (!publisher.empty())
			result.mdl.set("publisher", Utils::String::replace(publisher, "&nbsp;", " "));

		// Players
		result.mdl.set("players", game.child("joueurs").text().get());

		// TODO: Validate rating
		if (Settings::getInstance()->getBool("ScrapeRatings") && game.child("note"))
		{
			float ratingVal = (game.child("note").text().as_int() / 20.0f);
			std::stringstream ss;
			ss << ratingVal;
			result.mdl.set("rating", ss.str());
		}

		// Media super-node
		pugi::xml_node media_list = game.child("medias");

		if (media_list)
		{
			pugi::xml_node art = pugi::xml_node(NULL);

			// Do an XPath query for media[type='$media_type'], then filter by region
			// We need to do this because any child of 'medias' has the form
			// <media type="..." region="..." format="..."> 
			// and we need to find the right media for the region.
			pugi::xpath_node_set results = media_list.select_nodes((static_cast<std::string>("media[@type='") + ssConfig.media_name + "']").c_str());

			if (results.size())
			{
				// Region fallback: WOR(LD), US, CUS(TOM?), JP, EU
				for (auto _region : std::vector<std::string>{ region, "wor", "us", "cus", "jp", "eu" })
				{
					if (art)
						break;

					for (auto node : results)
					{
						if (node.node().attribute("region").value() == _region)
						{
							art = node.node();
							break;
						}
					}
				}
			} // results

			if (art)
			{
				// Sending a 'softname' containing space will make the image URLs returned by the API also contain the space. 
				//  Escape any spaces in the URL here
				result.imageUrl = Utils::String::replace(art.text().get(), " ", "%20");

				// Get the media type returned by ScreenScraper
				std::string media_type = art.attribute("format").value();
				if (!media_type.empty())
					result.imageType = "." + media_type;

				// Ask for the same image, but with a smaller size, for the thumbnail displayed during scraping
				result.thumbnailUrl = result.imageUrl + "&maxheight=250";
			}else{
				LOG(LogDebug) << "Failed to find media XML node with name=" << ssConfig.media_name;
			}

		}

		out_results.push_back(result);
	} // game
}

// Currently not used in this module
void ScreenScraperRequest::processList(const pugi::xml_document& xmldoc, std::vector<ScraperSearchResult>& results)
{
	assert(mRequestQueue != nullptr);

	LOG(LogDebug) << "Processing a list of results";

	pugi::xml_node data = xmldoc.child("Data");
	pugi::xml_node game = data.child("jeu");

	if (!game)
		LOG(LogDebug) << "Found nothing";

	ScreenScraperRequest::ScreenScraperConfig ssConfig;

	// limit the number of results per platform, not in total.
	// otherwise if the first platform returns >= 7 games
	// but the second platform contains the relevant game,
	// the relevant result would not be shown.
	for (int i = 0; game && i < MAX_SCRAPER_RESULTS; i++)
	{
		std::string id = game.child("id").text().get();
		std::string name = game.child("nom").text().get();
		std::string platformId = game.child("systemeid").text().get();
		std::string path = ssConfig.getGameSearchUrl(name) + "&systemeid=" + platformId + "&gameid=" + id;

		mRequestQueue->push(std::unique_ptr<ScraperRequest>(new ScreenScraperRequest(results, path)));

		game = game.next_sibling("jeu");
	}


}

std::string ScreenScraperRequest::ScreenScraperConfig::getGameSearchUrl(const std::string gameName) const
{
	return API_URL_BASE
		+ "/jeuInfos.php?devid=" + Utils::String::scramble(API_DEV_U, API_DEV_KEY)
		+ "&devpassword=" + Utils::String::scramble(API_DEV_P, API_DEV_KEY)
		+ "&softname=" + HttpReq::urlEncode(API_SOFT_NAME)
		+ "&output=xml"
		+ "&romnom=" + HttpReq::urlEncode(gameName);

}