use std::io;

use crossterm::cursor::MoveTo;
use crossterm::execute;
use crossterm::style::Print;
use crossterm::terminal::{Clear, ClearType, EnterAlternateScreen, LeaveAlternateScreen};
use unicode_blocks::UnicodeBlock;
use unicode_width::UnicodeWidthChar;

use unicode_blocks as ub;

fn measure_width(c: char) {
    if let Some(predicted_width) = c.width() {
        execute!(
            io::stdout(),
            Clear(ClearType::CurrentLine),
            MoveTo(0, 1),
            Print(c),
        )
        .unwrap();
        let actual_width: usize = crossterm::cursor::position().unwrap().0.into();
        if predicted_width != actual_width {
            eprintln!(
                "{}: actual {actual_width}, expected {predicted_width}",
                c as u32
            );
        }
    }
}

fn measure_widths(block: UnicodeBlock) {
    execute!(
        io::stdout(),
        Clear(ClearType::All),
        MoveTo(0, 0),
        Print(block.name()),
        MoveTo(0, 1),
    )
    .unwrap();
    for c in block.start()..=block.end() {
        if let Some(c) = char::from_u32(c) {
            measure_width(c);
        } else {
            eprintln!("{c}: error");
        }
    }
}

fn main() {
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen).unwrap();

    measure_widths(ub::ADLAM);
    measure_widths(ub::AEGEAN_NUMBERS);
    measure_widths(ub::AHOM);
    measure_widths(ub::ALCHEMICAL_SYMBOLS);
    measure_widths(ub::ALPHABETIC_PRESENTATION_FORMS);
    measure_widths(ub::ANATOLIAN_HIEROGLYPHS);
    measure_widths(ub::ANCIENT_GREEK_MUSICAL_NOTATION);
    measure_widths(ub::ANCIENT_GREEK_NUMBERS);
    measure_widths(ub::ANCIENT_SYMBOLS);
    measure_widths(ub::ARABIC);
    measure_widths(ub::ARABIC_EXTENDED_A);
    measure_widths(ub::ARABIC_EXTENDED_B);
    measure_widths(ub::ARABIC_MATHEMATICAL_ALPHABETIC_SYMBOLS);
    measure_widths(ub::ARABIC_PRESENTATION_FORMS_A);
    measure_widths(ub::ARABIC_PRESENTATION_FORMS_B);
    measure_widths(ub::ARABIC_SUPPLEMENT);
    measure_widths(ub::ARMENIAN);
    measure_widths(ub::ARROWS);
    measure_widths(ub::AVESTAN);
    measure_widths(ub::BALINESE);
    measure_widths(ub::BAMUM);
    measure_widths(ub::BAMUM_SUPPLEMENT);
    measure_widths(ub::BASIC_LATIN);
    measure_widths(ub::BASSA_VAH);
    measure_widths(ub::BATAK);
    measure_widths(ub::BENGALI);
    measure_widths(ub::BHAIKSUKI);
    measure_widths(ub::BLOCK_ELEMENTS);
    measure_widths(ub::BOPOMOFO);
    measure_widths(ub::BOPOMOFO_EXTENDED);
    measure_widths(ub::BOX_DRAWING);
    measure_widths(ub::BRAHMI);
    measure_widths(ub::BRAILLE_PATTERNS);
    measure_widths(ub::BUGINESE);
    measure_widths(ub::BUHID);
    measure_widths(ub::BYZANTINE_MUSICAL_SYMBOLS);
    measure_widths(ub::CARIAN);
    measure_widths(ub::CAUCASIAN_ALBANIAN);
    measure_widths(ub::CHAKMA);
    measure_widths(ub::CHAM);
    measure_widths(ub::CHEROKEE);
    measure_widths(ub::CHEROKEE_SUPPLEMENT);
    measure_widths(ub::CHESS_SYMBOLS);
    measure_widths(ub::CHORASMIAN);
    measure_widths(ub::CJK_COMPATIBILITY);
    measure_widths(ub::CJK_COMPATIBILITY_FORMS);
    measure_widths(ub::CJK_COMPATIBILITY_IDEOGRAPHS);
    measure_widths(ub::CJK_COMPATIBILITY_IDEOGRAPHS_SUPPLEMENT);
    measure_widths(ub::CJK_RADICALS_SUPPLEMENT);
    measure_widths(ub::CJK_STROKES);
    measure_widths(ub::CJK_SYMBOLS_AND_PUNCTUATION);
    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS);
    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A);
    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B);
    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_C);
    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_D);
    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_E);
    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_F);
    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_G);
    measure_widths(ub::COMBINING_DIACRITICAL_MARKS);
    measure_widths(ub::COMBINING_DIACRITICAL_MARKS_EXTENDED);
    measure_widths(ub::COMBINING_DIACRITICAL_MARKS_FOR_SYMBOLS);
    measure_widths(ub::COMBINING_DIACRITICAL_MARKS_SUPPLEMENT);
    measure_widths(ub::COMBINING_HALF_MARKS);
    measure_widths(ub::COMMON_INDIC_NUMBER_FORMS);
    measure_widths(ub::CONTROL_PICTURES);
    measure_widths(ub::COPTIC);
    measure_widths(ub::COPTIC_EPACT_NUMBERS);
    measure_widths(ub::COUNTING_ROD_NUMERALS);
    measure_widths(ub::CUNEIFORM);
    measure_widths(ub::CUNEIFORM_NUMBERS_AND_PUNCTUATION);
    measure_widths(ub::CURRENCY_SYMBOLS);
    measure_widths(ub::CYPRIOT_SYLLABARY);
    measure_widths(ub::CYPRO_MINOAN);
    measure_widths(ub::CYRILLIC);
    measure_widths(ub::CYRILLIC_EXTENDED_A);
    measure_widths(ub::CYRILLIC_EXTENDED_B);
    measure_widths(ub::CYRILLIC_EXTENDED_C);
    measure_widths(ub::CYRILLIC_SUPPLEMENT);
    measure_widths(ub::DESERET);
    measure_widths(ub::DEVANAGARI);
    measure_widths(ub::DEVANAGARI_EXTENDED);
    measure_widths(ub::DINGBATS);
    measure_widths(ub::DIVES_AKURU);
    measure_widths(ub::DOGRA);
    measure_widths(ub::DOMINO_TILES);
    measure_widths(ub::DUPLOYAN);
    measure_widths(ub::EARLY_DYNASTIC_CUNEIFORM);
    measure_widths(ub::EGYPTIAN_HIEROGLYPHS);
    measure_widths(ub::EGYPTIAN_HIEROGLYPH_FORMAT_CONTROLS);
    measure_widths(ub::ELBASAN);
    measure_widths(ub::ELYMAIC);
    measure_widths(ub::EMOTICONS);
    measure_widths(ub::ENCLOSED_ALPHANUMERICS);
    measure_widths(ub::ENCLOSED_ALPHANUMERIC_SUPPLEMENT);
    measure_widths(ub::ENCLOSED_CJK_LETTERS_AND_MONTHS);
    measure_widths(ub::ENCLOSED_IDEOGRAPHIC_SUPPLEMENT);
    measure_widths(ub::ETHIOPIC);
    measure_widths(ub::ETHIOPIC_EXTENDED);
    measure_widths(ub::ETHIOPIC_EXTENDED_A);
    measure_widths(ub::ETHIOPIC_EXTENDED_B);
    measure_widths(ub::ETHIOPIC_SUPPLEMENT);
    measure_widths(ub::GENERAL_PUNCTUATION);
    measure_widths(ub::GEOMETRIC_SHAPES);
    measure_widths(ub::GEOMETRIC_SHAPES_EXTENDED);
    measure_widths(ub::GEORGIAN);
    measure_widths(ub::GEORGIAN_EXTENDED);
    measure_widths(ub::GEORGIAN_SUPPLEMENT);
    measure_widths(ub::GLAGOLITIC);
    measure_widths(ub::GLAGOLITIC_SUPPLEMENT);
    measure_widths(ub::GOTHIC);
    measure_widths(ub::GRANTHA);
    measure_widths(ub::GREEK_AND_COPTIC);
    measure_widths(ub::GREEK_EXTENDED);
    measure_widths(ub::GUJARATI);
    measure_widths(ub::GUNJALA_GONDI);
    measure_widths(ub::GURMUKHI);
    measure_widths(ub::HALFWIDTH_AND_FULLWIDTH_FORMS);
    measure_widths(ub::HANGUL_COMPATIBILITY_JAMO);
    measure_widths(ub::HANGUL_JAMO);
    measure_widths(ub::HANGUL_JAMO_EXTENDED_A);
    measure_widths(ub::HANGUL_JAMO_EXTENDED_B);
    measure_widths(ub::HANGUL_SYLLABLES);
    measure_widths(ub::HANIFI_ROHINGYA);
    measure_widths(ub::HANUNOO);
    measure_widths(ub::HATRAN);
    measure_widths(ub::HEBREW);
    // measure_widths(ub::HIGH_PRIVATE_USE_SURROGATES);
    // measure_widths(ub::HIGH_SURROGATES);
    measure_widths(ub::HIRAGANA);
    measure_widths(ub::IDEOGRAPHIC_DESCRIPTION_CHARACTERS);
    measure_widths(ub::IDEOGRAPHIC_SYMBOLS_AND_PUNCTUATION);
    measure_widths(ub::IMPERIAL_ARAMAIC);
    measure_widths(ub::INDIC_SIYAQ_NUMBERS);
    measure_widths(ub::INSCRIPTIONAL_PAHLAVI);
    measure_widths(ub::INSCRIPTIONAL_PARTHIAN);
    measure_widths(ub::IPA_EXTENSIONS);
    measure_widths(ub::JAVANESE);
    measure_widths(ub::KAITHI);
    measure_widths(ub::KANA_EXTENDED_A);
    measure_widths(ub::KANA_EXTENDED_B);
    measure_widths(ub::KANA_SUPPLEMENT);
    measure_widths(ub::KANBUN);
    measure_widths(ub::KANGXI_RADICALS);
    measure_widths(ub::KANNADA);
    measure_widths(ub::KATAKANA);
    measure_widths(ub::KATAKANA_PHONETIC_EXTENSIONS);
    measure_widths(ub::KAYAH_LI);
    measure_widths(ub::KHAROSHTHI);
    measure_widths(ub::KHITAN_SMALL_SCRIPT);
    measure_widths(ub::KHMER);
    measure_widths(ub::KHMER_SYMBOLS);
    measure_widths(ub::KHOJKI);
    measure_widths(ub::KHUDAWADI);
    measure_widths(ub::LAO);
    measure_widths(ub::LATIN_1_SUPPLEMENT);
    measure_widths(ub::LATIN_EXTENDED_A);
    measure_widths(ub::LATIN_EXTENDED_ADDITIONAL);
    measure_widths(ub::LATIN_EXTENDED_B);
    measure_widths(ub::LATIN_EXTENDED_C);
    measure_widths(ub::LATIN_EXTENDED_D);
    measure_widths(ub::LATIN_EXTENDED_E);
    measure_widths(ub::LATIN_EXTENDED_F);
    measure_widths(ub::LATIN_EXTENDED_G);
    measure_widths(ub::LEPCHA);
    measure_widths(ub::LETTERLIKE_SYMBOLS);
    measure_widths(ub::LIMBU);
    measure_widths(ub::LINEAR_A);
    measure_widths(ub::LINEAR_B_IDEOGRAMS);
    measure_widths(ub::LINEAR_B_SYLLABARY);
    measure_widths(ub::LISU);
    measure_widths(ub::LISU_SUPPLEMENT);
    // measure_widths(ub::LOW_SURROGATES);
    measure_widths(ub::LYCIAN);
    measure_widths(ub::LYDIAN);
    measure_widths(ub::MAHAJANI);
    measure_widths(ub::MAHJONG_TILES);
    measure_widths(ub::MAKASAR);
    measure_widths(ub::MALAYALAM);
    measure_widths(ub::MANDAIC);
    measure_widths(ub::MANICHAEAN);
    measure_widths(ub::MARCHEN);
    measure_widths(ub::MASARAM_GONDI);
    measure_widths(ub::MATHEMATICAL_ALPHANUMERIC_SYMBOLS);
    measure_widths(ub::MATHEMATICAL_OPERATORS);
    measure_widths(ub::MAYAN_NUMERALS);
    measure_widths(ub::MEDEFAIDRIN);
    measure_widths(ub::MEETEI_MAYEK);
    measure_widths(ub::MEETEI_MAYEK_EXTENSIONS);
    measure_widths(ub::MENDE_KIKAKUI);
    measure_widths(ub::MEROITIC_CURSIVE);
    measure_widths(ub::MEROITIC_HIEROGLYPHS);
    measure_widths(ub::MIAO);
    measure_widths(ub::MISCELLANEOUS_MATHEMATICAL_SYMBOLS_A);
    measure_widths(ub::MISCELLANEOUS_MATHEMATICAL_SYMBOLS_B);
    measure_widths(ub::MISCELLANEOUS_SYMBOLS);
    measure_widths(ub::MISCELLANEOUS_SYMBOLS_AND_ARROWS);
    measure_widths(ub::MISCELLANEOUS_SYMBOLS_AND_PICTOGRAPHS);
    measure_widths(ub::MISCELLANEOUS_TECHNICAL);
    measure_widths(ub::MODI);
    measure_widths(ub::MODIFIER_TONE_LETTERS);
    measure_widths(ub::MONGOLIAN);
    measure_widths(ub::MONGOLIAN_SUPPLEMENT);
    measure_widths(ub::MRO);
    measure_widths(ub::MULTANI);
    measure_widths(ub::MUSICAL_SYMBOLS);
    measure_widths(ub::MYANMAR);
    measure_widths(ub::MYANMAR_EXTENDED_A);
    measure_widths(ub::MYANMAR_EXTENDED_B);
    measure_widths(ub::NABATAEAN);
    measure_widths(ub::NANDINAGARI);
    measure_widths(ub::NEWA);
    measure_widths(ub::NEW_TAI_LUE);
    measure_widths(ub::NKO);
    measure_widths(ub::NUMBER_FORMS);
    measure_widths(ub::NUSHU);
    measure_widths(ub::NYIAKENG_PUACHUE_HMONG);
    measure_widths(ub::OGHAM);
    measure_widths(ub::OLD_HUNGARIAN);
    measure_widths(ub::OLD_ITALIC);
    measure_widths(ub::OLD_NORTH_ARABIAN);
    measure_widths(ub::OLD_PERMIC);
    measure_widths(ub::OLD_PERSIAN);
    measure_widths(ub::OLD_SOGDIAN);
    measure_widths(ub::OLD_SOUTH_ARABIAN);
    measure_widths(ub::OLD_TURKIC);
    measure_widths(ub::OLD_UYGHUR);
    measure_widths(ub::OL_CHIKI);
    measure_widths(ub::OPTICAL_CHARACTER_RECOGNITION);
    measure_widths(ub::ORIYA);
    measure_widths(ub::ORNAMENTAL_DINGBATS);
    measure_widths(ub::OSAGE);
    measure_widths(ub::OSMANYA);
    measure_widths(ub::OTTOMAN_SIYAQ_NUMBERS);
    measure_widths(ub::PAHAWH_HMONG);
    measure_widths(ub::PALMYRENE);
    measure_widths(ub::PAU_CIN_HAU);
    measure_widths(ub::PHAGS_PA);
    measure_widths(ub::PHAISTOS_DISC);
    measure_widths(ub::PHOENICIAN);
    measure_widths(ub::PHONETIC_EXTENSIONS);
    measure_widths(ub::PHONETIC_EXTENSIONS_SUPPLEMENT);
    measure_widths(ub::PLAYING_CARDS);
    measure_widths(ub::PRIVATE_USE_AREA);
    measure_widths(ub::PSALTER_PAHLAVI);
    measure_widths(ub::REJANG);
    measure_widths(ub::RUMI_NUMERAL_SYMBOLS);
    measure_widths(ub::RUNIC);
    measure_widths(ub::SAMARITAN);
    measure_widths(ub::SAURASHTRA);
    measure_widths(ub::SHARADA);
    measure_widths(ub::SHAVIAN);
    measure_widths(ub::SHORTHAND_FORMAT_CONTROLS);
    measure_widths(ub::SIDDHAM);
    measure_widths(ub::SINHALA);
    measure_widths(ub::SINHALA_ARCHAIC_NUMBERS);
    measure_widths(ub::SMALL_FORM_VARIANTS);
    measure_widths(ub::SMALL_KANA_EXTENSION);
    measure_widths(ub::SOGDIAN);
    measure_widths(ub::SORA_SOMPENG);
    measure_widths(ub::SOYOMBO);
    measure_widths(ub::SPACING_MODIFIER_LETTERS);
    measure_widths(ub::SPECIALS);
    measure_widths(ub::SUNDANESE);
    measure_widths(ub::SUNDANESE_SUPPLEMENT);
    measure_widths(ub::SUPERSCRIPTS_AND_SUBSCRIPTS);
    measure_widths(ub::SUPPLEMENTAL_ARROWS_A);
    measure_widths(ub::SUPPLEMENTAL_ARROWS_B);
    measure_widths(ub::SUPPLEMENTAL_ARROWS_C);
    measure_widths(ub::SUPPLEMENTAL_MATHEMATICAL_OPERATORS);
    measure_widths(ub::SUPPLEMENTAL_PUNCTUATION);
    measure_widths(ub::SUPPLEMENTAL_SYMBOLS_AND_PICTOGRAPHS);
    measure_widths(ub::SUPPLEMENTARY_PRIVATE_USE_AREA_A);
    measure_widths(ub::SUPPLEMENTARY_PRIVATE_USE_AREA_B);
    measure_widths(ub::SUTTON_SIGNWRITING);
    measure_widths(ub::SYLOTI_NAGRI);
    measure_widths(ub::SYMBOLS_AND_PICTOGRAPHS_EXTENDED_A);
    measure_widths(ub::SYMBOLS_FOR_LEGACY_COMPUTING);
    measure_widths(ub::SYRIAC);
    measure_widths(ub::SYRIAC_SUPPLEMENT);
    measure_widths(ub::TAGALOG);
    measure_widths(ub::TAGBANWA);
    measure_widths(ub::TAGS);
    measure_widths(ub::TAI_LE);
    measure_widths(ub::TAI_THAM);
    measure_widths(ub::TAI_VIET);
    measure_widths(ub::TAI_XUAN_JING_SYMBOLS);
    measure_widths(ub::TAKRI);
    measure_widths(ub::TAMIL);
    measure_widths(ub::TAMIL_SUPPLEMENT);
    measure_widths(ub::TANGSA);
    measure_widths(ub::TANGUT);
    measure_widths(ub::TANGUT_COMPONENTS);
    measure_widths(ub::TANGUT_SUPPLEMENT);
    measure_widths(ub::TELUGU);
    measure_widths(ub::THAANA);
    measure_widths(ub::THAI);
    measure_widths(ub::TIBETAN);
    measure_widths(ub::TIFINAGH);
    measure_widths(ub::TIRHUTA);
    measure_widths(ub::TOTO);
    measure_widths(ub::TRANSPORT_AND_MAP_SYMBOLS);
    measure_widths(ub::UGARITIC);
    measure_widths(ub::UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS);
    measure_widths(ub::UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS_EXTENDED);
    measure_widths(ub::UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS_EXTENDED_A);
    measure_widths(ub::VAI);
    measure_widths(ub::VARIATION_SELECTORS);
    measure_widths(ub::VARIATION_SELECTORS_SUPPLEMENT);
    measure_widths(ub::VEDIC_EXTENSIONS);
    measure_widths(ub::VERTICAL_FORMS);
    measure_widths(ub::VITHKUQI);
    measure_widths(ub::WANCHO);
    measure_widths(ub::WARANG_CITI);
    measure_widths(ub::YEZIDI);
    measure_widths(ub::YIJING_HEXAGRAM_SYMBOLS);
    measure_widths(ub::YI_RADICALS);
    measure_widths(ub::YI_SYLLABLES);
    measure_widths(ub::ZANABAZAR_SQUARE);
    measure_widths(ub::ZNAMENNY_MUSICAL_NOTATION);

    execute!(stdout, LeaveAlternateScreen).unwrap();
}