import type { Word } from '../data.d';
import { accentuateVerb } from './accentuation';
import amalgamate from './amalgamate';

// Morpheme slots

// Prefix

// Past
const pastTimeMorpheme = 'ἐ';

// Perfective
const perfectiveMorpheme = 'λε';

// Lexical

// Passive
const passiveMorpheme = 'θη';

// Future
const futureMorpheme = 'σ';

// Aspect
// Connecting vowel
// const neturalMorpheme = "ο" or "ε"
const aoristicAspectMorpheme = 'σα';
const perfectiveAspectMorpheme = 'κα';

// Final (person-number)
const primarySuffixes = {
  singular: {
    1: 'ω',
    2: 'εις',
    3: 'ει',
  },
  plural: {
    1: 'ομεν',
    2: 'ετε',
    3: 'ουσι',
  },
};
const secondarySuffixes = {
  singular: {
    1: 'ν',
    2: 'ς',
    3: '', // movable ν
  },
  plural: {
    1: 'μεν',
    2: 'τε',
    3: 'v', // or σαν
  },
};

const presentSubjunctiveEndings = {
  singular: {
    1: 'ω',
    2: 'ῃς',
    3: 'ῃ',
  },
  plural: {
    1: 'ωμεν',
    2: 'ητε',
    3: 'ωσι',
  },
};

const middleAndPassiveEndings = {
  singular: {
    1: 'ομαι',
    2: 'ῃ',
    3: 'εται',
  },
  plural: {
    1: 'όμεθα',
    2: 'εσθε',
    3: 'ονται',
  },
};

const imperfectEndings = {
  singular: {
    1: 'ον',
    2: 'ες',
    3: 'ε',
  },
  plural: {
    1: 'ομεν',
    2: 'ετε',
    3: 'ον',
  },
};

const imperativeMorphemes = {
  // to do
};

// aka "past time morpheme"
function augmentize(word: string) {
  // TODO: account for
  // syllabic augment
  // temporal augment
  // zero augment

  return pastTimeMorpheme + word;
}

// "repetition of the initial consonant of the verb stem plus the vowel ε" (Black)
function reduplicate(morpheme: string) {}

function amalgamize() {}

function hasPrepositionalPrefix(word: string) {
  // κατα
  // other prepositional prefixes?
}

function presentActiveIndicatives(stem: string) {
  return {
    singular: {
      1: accentuateVerb(stem + primarySuffixes.singular[1]),
      2: accentuateVerb(stem + primarySuffixes.singular[2]),
      3: accentuateVerb(stem + primarySuffixes.singular[3]),
    },
    plural: {
      1: accentuateVerb(stem + primarySuffixes.plural[1]),
      2: accentuateVerb(stem + primarySuffixes.plural[2]),
      3: accentuateVerb(stem + primarySuffixes.plural[3]),
    },
  };
}

function middleAndPassiveIndicatives(stem: string) {
  return {
    singular: {
      1: stem + middleAndPassiveEndings.singular[1],
      2: stem + middleAndPassiveEndings.singular[2],
      3: stem + middleAndPassiveEndings.singular[3],
    },
    plural: {
      1: stem + middleAndPassiveEndings.plural[1],
      2: stem + middleAndPassiveEndings.plural[2],
      3: stem + middleAndPassiveEndings.plural[3],
    },
  };
}

function imperfectActiveIndicatives(stem: string) {
  const augmentedStem = pastTimeMorpheme + stem;
  return {
    singular: {
      1: accentuateVerb(augmentedStem + imperfectEndings.singular[1]),
      2: accentuateVerb(augmentedStem + imperfectEndings.singular[2]),
      3: accentuateVerb(augmentedStem + imperfectEndings.singular[3]),
    },
    plural: {
      1: accentuateVerb(augmentedStem + imperfectEndings.plural[1]),
      2: accentuateVerb(augmentedStem + imperfectEndings.plural[2]),
      3: accentuateVerb(augmentedStem + imperfectEndings.plural[3]),
    },
  };
}

function presentActiveSubjunctives(stem: string) {
  return {
    singular: {
      1: stem + presentSubjunctiveEndings.singular[1],
      2: stem + presentSubjunctiveEndings.singular[2],
      3: stem + presentSubjunctiveEndings.singular[3],
    },
    plural: {
      1: stem + presentSubjunctiveEndings.plural[1],
      2: stem + presentSubjunctiveEndings.plural[2],
      3: stem + presentSubjunctiveEndings.plural[3],
    },
  };
}

function middleAndPassiveSubjunctives(stem: string) {
  return {
    singular: {
      1: stem + presentSubjunctiveEndings.singular[1],
      2: stem + presentSubjunctiveEndings.singular[2],
      3: stem + presentSubjunctiveEndings.singular[3],
    },
    plural: {
      1: stem + presentSubjunctiveEndings.plural[1],
      2: stem + presentSubjunctiveEndings.plural[2],
      3: stem + presentSubjunctiveEndings.plural[3],
    },
  };
}

function futureActiveIndicatives(stem: string) {
  return {
    singular: {
      1: accentuateVerb(
        amalgamate(stem + futureMorpheme + primarySuffixes.singular[1]),
      ),
      2: accentuateVerb(
        amalgamate(stem + futureMorpheme + primarySuffixes.singular[2]),
      ),
      3: accentuateVerb(
        amalgamate(stem + futureMorpheme + primarySuffixes.singular[3]),
      ),
    },
    plural: {
      1: accentuateVerb(
        amalgamate(stem + futureMorpheme + primarySuffixes.plural[1]),
      ),
      2: accentuateVerb(
        amalgamate(stem + futureMorpheme + primarySuffixes.plural[2]),
      ),
      3: accentuateVerb(
        amalgamate(stem + futureMorpheme + primarySuffixes.plural[3]),
      ),
    },
  };
}

// middleAndPassiveEndings

function futureMiddleIndicatives(stem: string) {
  return {
    singular: {
      1: stem + futureMorpheme + middleAndPassiveEndings.singular[1],
      2: stem + futureMorpheme + middleAndPassiveEndings.singular[2],
      3: stem + futureMorpheme + middleAndPassiveEndings.singular[3],
    },
    plural: {
      1: stem + futureMorpheme + middleAndPassiveEndings.plural[1],
      2: stem + futureMorpheme + middleAndPassiveEndings.plural[2],
      3: stem + futureMorpheme + middleAndPassiveEndings.plural[3],
    },
  };
}

function stem(word: Word) {
  if (word.principleParts[1]) {
    return word.principleParts[1].substr(0, word.principleParts[1].length - 1);
  }
  return null;
}

export {
  primarySuffixes,
  middleAndPassiveEndings,
  presentActiveIndicatives,
  presentActiveSubjunctives,
  imperfectActiveIndicatives,
  futureActiveIndicatives,
  futureMiddleIndicatives,
  augmentize,
  stem,
};