from random import choice, choices

WEIGHTS_MAP_HARD = [
    100,
    10,
    8,
    6,
    2
]

WEIGHTS_MAP_SOFT = [
    80,
    30,
    10,
    7,
    2
]

def get_next_word_results(db, message, prev_word, text, _):
    results = []
    if prev_word not in db:
        return results
    for token in db[prev_word]:
        token.score = 0
        for context in token.contexts:
            if context in message:
                token.score += 2
            if context in text:
                token.score += 1
        if ")" in token.word and text.count("(") > text.count(")"):
            token.score += 10
        if token.score > 0:
            results.append(token)
    return results


def get_next_word(db, message, prevword, text, conf, repeat=0):
    if prevword == '' or '.' in prevword or '?' in prevword or '!' in prevword:
        return get_first_word(db, message, text, conf, repeat)
    results = get_next_word_results(db, message, prevword, text, conf)
    if len(results) == 0:
        if repeat >= 1:
            return choice(list(db.keys()))
        else:
            return get_next_word(db, message, prevword, text, conf, repeat + 1)
    results = list(sorted(results, key=lambda x: x.score, reverse=True))
    total_results = []
    max_score = 0
    for i in range(min(len(results), 5)):
        if max_score == 0:
            total_results.append(results[i].word)
            max_score = results[i].score
        elif max_score == results[i].score:
            total_results.append(results[i].word)
    if len(total_results) == 0:
        return get_next_word(db, message, prevword, text, conf, repeat + 1)
    return choice(total_results)


def get_first_word_results(db, message, text, _):
    results = []
    if '' not in db:
        return results
    for token in db['']:
        token.score = 0
        for context in token.contexts:
            if context in message:
                token.score += 2
            if context in text:
                token.score += 1
        if token.starter:
            token.score += 15
        if token.score > 0:
            results.append(token)
    return results


def get_first_word(db, message, text, conf, repeat=0):
    results = get_first_word_results(db, message, text, conf)
    if len(results) == 0:
        if repeat >= 1:
            return choice(list(db.keys()))
        else:
            return get_first_word(db, message, text, conf, repeat + 1)
    results = list(sorted(results, key=lambda x: x.score, reverse=True))
    total_results = []
    weights = []
    for i in range(min(len(results), 5)):
        total_results.append(results[i].word)
        weights.append(WEIGHTS_MAP_SOFT[i])
    if len(total_results) == 0:
        return get_first_word(db, message, text, conf, repeat + 1)
    return (choices(total_results, weights=weights, k=1) or '.')[0]