/*
** Copyright (c) 2014-2018, Eren Okka
**
** This Source Code Form is subject to the terms of the Mozilla Public
** License, v. 2.0. If a copy of the MPL was not distributed with this
** file, You can obtain one at https://mozilla.org/MPL/2.0/.
*/

#include <algorithm>

#include "keyword.h"
#include "token.h"

namespace anitomy {

KeywordManager keyword_manager;

KeywordManager::KeywordManager() {
	const KeywordOptions options_default;
	const KeywordOptions options_invalid{true, true, false};
	const KeywordOptions options_unidentifiable{false, true, true};
	const KeywordOptions options_unidentifiable_invalid{false, true, false};
	const KeywordOptions options_unidentifiable_unsearchable{false, false, true};

	Add(kElementAnimeSeasonPrefix, options_unidentifiable, {L"SAISON", L"SEASON"});

	Add(kElementAnimeType, options_unidentifiable,
		{L"GEKIJOUBAN", L"MOVIE", L"OAD", L"OAV", L"ONA", L"OVA", L"SPECIAL", L"SPECIALS", L"TV"});
	Add(kElementAnimeType, options_unidentifiable_unsearchable, {L"SP"}); // e.g. "Yumeiro Patissiere SP Professional"
	Add(kElementAnimeType, options_unidentifiable_invalid,
		{L"ED", L"ENDING", L"NCED", L"NCOP", L"OP", L"OPENING", L"PREVIEW", L"PV"});

	Add(kElementAudioTerm, options_default,
		{// Audio channels
		 L"2.0CH", L"2CH", L"5.1", L"5.1CH", L"DTS", L"DTS-ES", L"DTS5.1", L"TRUEHD5.1",
		 // Audio codec
		 L"AAC", L"AACX2", L"AACX3", L"AACX4", L"AC3", L"EAC3", L"E-AC-3", L"FLAC", L"FLACX2", L"FLACX3", L"FLACX4",
		 L"LOSSLESS", L"MP3", L"OGG", L"VORBIS",
		 // Audio language
		 L"DUALAUDIO", L"DUAL AUDIO"});

	Add(kElementDeviceCompatibility, options_default, {L"IPAD3", L"IPHONE5", L"IPOD", L"PS3", L"XBOX", L"XBOX360"});
	Add(kElementDeviceCompatibility, options_unidentifiable, {L"ANDROID"});

	Add(kElementEpisodePrefix, options_default,
		{L"EP", L"EP.", L"EPS", L"EPS.", L"EPISODE", L"EPISODE.", L"EPISODES", L"CAPITULO", L"EPISODIO",
		 L"EPIS\u00F3DIO", L"FOLGE"});
	Add(kElementEpisodePrefix, options_invalid,
		{L"E", L"\x7B2C"}); // single-letter episode keywords are not valid tokens

	Add(kElementFileExtension, options_default,
		{L"3GP", L"AVI", L"DIVX", L"FLV", L"M2TS", L"MKV", L"MOV", L"MP4", L"MPG", L"OGM", L"RM", L"RMVB", L"TS",
		 L"WEBM", L"WMV"});
	Add(kElementFileExtension, options_invalid,
		{L"AAC", L"AIFF", L"FLAC", L"M4A", L"MP3", L"MKA", L"OGG", L"WAV", L"WMA", L"7Z", L"RAR", L"ZIP", L"ASS",
		 L"SRT"});

	Add(kElementLanguage, options_default, {L"ENG", L"ENGLISH", L"ESPANOL", L"JAP", L"PT-BR", L"SPANISH", L"VOSTFR"});
	Add(kElementLanguage, options_unidentifiable, {L"ESP", L"ITA"}); // e.g. "Tokyo ESP", "Bokura ga Ita"

	Add(kElementOther, options_default,
		{L"REMASTER", L"REMASTERED", L"UNCENSORED", L"UNCUT", L"TS", L"VFR", L"WIDESCREEN", L"WS"});

	Add(kElementReleaseGroup, options_default, {L"THORA"});

	Add(kElementReleaseInformation, options_default, {L"BATCH", L"COMPLETE", L"PATCH", L"REMUX"});
	Add(kElementReleaseInformation, options_unidentifiable,
		{L"END", L"FINAL"}); // e.g. "The End of Evangelion", "Final Approach"

	Add(kElementReleaseVersion, options_default, {L"V0", L"V1", L"V2", L"V3", L"V4"});

	Add(kElementSource, options_default,
		{L"BD",		 L"BDRIP",	 L"BLURAY",	 L"BLU-RAY", L"DVD",	 L"DVD5",	L"DVD9",
		 L"DVD-R2J", L"DVDRIP",	 L"DVD-RIP", L"R2DVD",	 L"R2J",	 L"R2JDVD", L"R2JDVDRIP",
		 L"HDTV",	 L"HDTVRIP", L"TVRIP",	 L"TV-RIP",	 L"WEBCAST", L"WEBRIP"});

	Add(kElementSubtitles, options_default,
		{L"ASS", L"BIG5", L"DUB", L"DUBBED", L"HARDSUB", L"HARDSUBS", L"RAW", L"SOFTSUB", L"SOFTSUBS", L"SUB",
		 L"SUBBED", L"SUBTITLED"});

	Add(kElementVideoTerm, options_default,
		{// Frame rate
		 L"23.976FPS", L"24FPS", L"29.97FPS", L"30FPS", L"60FPS", L"120FPS",
		 // Video codec
		 L"8BIT", L"8-BIT", L"10BIT", L"10BITS", L"10-BIT", L"10-BITS", L"HI10", L"HI10P", L"HI444", L"HI444P",
		 L"HI444PP", L"H264", L"H265", L"H.264", L"H.265", L"X264", L"X265", L"X.264", L"AVC", L"HEVC", L"HEVC2",
		 L"DIVX", L"DIVX5", L"DIVX6", L"XVID", L"AV1",
		 // Video format
		 L"AVI", L"RMVB", L"WMV", L"WMV3", L"WMV9",
		 // Video quality
		 L"HQ", L"LQ",
		 // Video resolution
		 L"HD", L"SD"});

	Add(kElementVolumePrefix, options_default, {L"VOL", L"VOL.", L"VOLUME"});
}

void KeywordManager::Add(ElementCategory category, const KeywordOptions& options,
						 const std::initializer_list<string_t>& keywords) {
	auto& keys = GetKeywordContainer(category);
	for (const auto& keyword : keywords) {
		if (keyword.empty())
			continue;
		if (keys.find(keyword) != keys.end())
			continue;
		keys.insert(std::make_pair(keyword, Keyword{category, options}));
	}
}

bool KeywordManager::Find(ElementCategory category, const string_t& str) const {
	const auto& keys = GetKeywordContainer(category);
	auto it = keys.find(str);
	if (it != keys.end() && it->second.category == category)
		return true;

	return false;
}

bool KeywordManager::Find(const string_t& str, ElementCategory& category, KeywordOptions& options) const {
	const auto& keys = GetKeywordContainer(category);
	auto it = keys.find(str);
	if (it != keys.end()) {
		if (category == kElementUnknown) {
			category = it->second.category;
		} else if (it->second.category != category) {
			return false;
		}
		options = it->second.options;
		return true;
	}

	return false;
}

string_t KeywordManager::Normalize(const string_t& str) const {
	return StringToUpperCopy(str);
}

KeywordManager::keyword_container_t& KeywordManager::GetKeywordContainer(ElementCategory category) const {
	return category == kElementFileExtension ? const_cast<keyword_container_t&>(file_extensions_)
											 : const_cast<keyword_container_t&>(keys_);
}

////////////////////////////////////////////////////////////////////////////////

void KeywordManager::Peek(const string_t& filename, const TokenRange& range, Elements& elements,
						  std::vector<TokenRange>& preidentified_tokens) const {
	using entry_t = std::pair<ElementCategory, std::vector<string_t>>;
	static const std::vector<entry_t> entries{
		{kElementAudioTerm,		{L"Dual Audio"}					   },
		{kElementVideoTerm,		{L"H264", L"H.264", L"h264", L"h.264"}},
		{kElementVideoResolution, {L"480p", L"720p", L"1080p"}		  },
		{kElementSource,			 {L"Blu-Ray"}							 }
	  };

	auto it_begin = filename.begin() + range.offset;
	auto it_end = it_begin + range.size;

	for (const auto& entry : entries) {
		for (const auto& keyword : entry.second) {
			auto it = std::search(it_begin, it_end, keyword.begin(), keyword.end());
			if (it != it_end) {
				const auto offset = static_cast<size_t>(std::distance(filename.begin(), it));
				elements.insert(entry.first, keyword);
				preidentified_tokens.push_back(TokenRange{offset, keyword.size()});
			}
		}
	}
}

} // namespace anitomy