#pragma once

//  https://jakubmarian.com/special-characters-diacritics-used-in-european-languages/

#include <string>
#include <map>
#include <iomanip>
#include <tuple>
#include <vector>
#include <utility>
#include <regex>
#include <unistd.h>

#include "locator.h"

inline
std::string klammertext_special_characters { "@|*^#" };

inline
std::string encoding_marker { "UU" };

inline
std::string diacritic_symbols = "-'`h~\"cbrdwa";

inline
std::string diacritic_symbols_order = "'`h~\"c-brdwa";

// ^UUUU^ — a Unicode code point in hex, 4 to 6 digits (^263A^ is the BMP,
// ^13000^ EGYPTIAN HIEROGLYPH A001, ^10FFFD^ the top of the range), or a
// single digit.  Lengths 2-3 are NOT accepted: two- and three-letter
// sequences of a-f collide with the ^s^-style mnemonic names.
const std::regex unicode_re(R"(\^(([0-9A-Fa-f]{4,6})|([0-9A-Fa-f]))\^)");
const std::regex unicode_hide_re(R"(=([0-9A-Fa-f]{2})=)");
const std::regex hex2_re(R"(([0-9A-Fa-f]{2}))");
const std::regex hex4_re(R"(([0-9A-Fa-f]{4}))");
const std::regex hex5_re(R"(([0-9A-Fa-f]{5}))");

// The hide_special_characters vector was removed.  The ^X mechanism for
// Klammertext special characters is handled by the katomizer (type
// katom_t::special) and the general KTESC escape mechanism for
// target-specific characters.

inline
std::map<std::string, std::string> diacritic_example_letter {
    {"'", "e"},
    {"`", "a"},
    {"h", "o"},
    {"~", "n"},
    {"\"", "u"},
    {"c", "c"},
    {"-", "o"},
    {"b", "g"},
    {"r", "a"},
    {"d", "e"},
    {"w", "s"},
    {"a", "o"}};

inline
std::map<std::string, std::pair<std::string, std::string>> diacritics {
    {"`", {"0300", "grave accent"}},
    {"'", {"0301", "acute accent"}},
    {"h", {"0302", "circumflex"}},
    {"~", {"0303", "tilde"}},
    {"-", {"0304", "macron"}},
    {"\"", {"0308", "diaresis"}},
//   {"v", {"0305", "vinculum"}},
    {"b", {"0306", "breve"}},
    {"d", {"0307", "dot above"}},
    {"r", {"030A", "ring above"}},
    {"w", {"030C", "wedge"}},
    {"c", {"0327", "cedilla"}},
    {"a", {"030B", "double acute accent"}}};

inline
std::vector<std::string> extended_latin_symbols = {
    "s",
    "i", "I", "t", "T", "e", "E", "o", "O", "d", "D",
    "ae", "AE", "oe", "OE"
};

inline
std::map<std::string, std::pair<std::string, std::string>> extended_latin {
    {"ae", {"00E6", "ae ligature"}},
    {"AE", {"00C6", "ae ligature capital"}},
    {"oe", {"0153", "oe ligature"}},
    {"OE", {"0152", "oe ligature capital"}},
    {"i",  {"0131", "dotless i"}},
    {"I",  {"0130", "capital dotted i"}},
    {"t",  {"00FE", "thorn"}},
    {"T",  {"00DE", "thorn capital"}},
    {"e",  {"00F0", "eth"}},
    {"E",  {"00D0", "eth capital"}},
    {"o",  {"00F8", "o stroke"}},
    {"O",  {"00D8", "o stroke capital"}},
    {"s",  {"00DF", "Eszett"}},
    {"d",  {"0111", "d stroke"}},
    {"D",  {"0110", "d stroke capital"}}};

inline
std::map<std::string, std::pair<std::string, std::string>> pinyin_tones {
    {"1", {"0304", "high"}},
    {"2", {"0301", "rising"}},
    {"3", {"030C", "falling-rising"}},
    {"4", {"0300", "falling"}}};

inline
std::vector<std::vector<std::string>> ptolemy {
    {"Q3",   "P",    "132AA"},
    {"X1",   "t",    "133CF"},
    {"V4",   "o/wa", "13371"},
    {"E23",  "l/r",  "130ED"},
    {"Aa15", "m",    "1340D"},
    {"M17A", "e/y",  "131CC"},
    {"S29",  "s",    "132F4"}};

/*
  道 (dào): U+9053
  可 (kě): U+53EF
  道 (dào): U+9053
  非 (fēi): U+975E
  常 (cháng): U+5E38
  道 (dào): U+9053
*/

inline
std::vector<std::vector<std::string>> dao {
    {"dào", "9053"},
    {"kě", "53EF"},
    {"dào", "9053"},
    {"fēi", "975E"},
    {"cháng", "5E38"},
    {"dào", "9053"}};

inline
bool is_tty() { return isatty(fileno(stdout)); }
inline
const std::string italic_on() { return is_tty() ? "\033[3m" : ""; }
inline
const std::string italic_off() { return is_tty() ? "\033[0m" : ""; }

std::string encode(const std::string& s, const Locator& loc);

// UTF-8 encoding of one code point (to U+10FFFF; surrogates and values
// above the range yield an "Invalid Unicode: N" text).  Used by the
// character tables here and by the ^UUUU UUUU ...^ sequence pass
// (process_unicode_sequences in katom_process.cpp).
std::string utf8char(int cp);

// Whether cp may be written in a ^...^ form: within the Unicode range,
// not a surrogate, and not a NONCHARACTER (U+FDD0-U+FDEF and the last two
// code points of every plane) -- the standard reserves those for internal
// use, never for interchange.  An invalid code point in a document is a
// located Parsing_error (the no-warn-and-continue policy; the in-band
// "Invalid Unicode" text is no longer reachable from input).
bool valid_codepoint(int cp);
std::string invalid_codepoint_reason(int cp);

// void diacritics_examples(const std::string& kt_filename = "");
// void extended_latin_examples(const std::string& kt_filename = "");

void pinyin_examples(const std::string& kt_filename = "");
void unicode_examples(const std::string& kt_filename = "");

void show_special_characters();