import singlog;

import core.stdc.stdlib : exit, EXIT_SUCCESS, EXIT_FAILURE;
import std.stdio, std.conv, std.path, std.file, std.format, std.regex, std.array, std.algorithm;

import source.database;

enum {
    GROUP_THEME = 2,
    GROUP_THEME_TEXT = 5,
    GROUP_QUESTION = 7,
    GROUP_QUESTION_TEXT = 10,
    GROUP_ANSWER = 12,
    GROUP_ANSWER_TEXT = 15,
    GROUP_ANSWER_RIGHT = 17,
    GROUP_ANSWER_RIGHT_TEXT = 20,
}

int main(string[] args)
{
    log.level(log.level.debugging)
        .output(log.output.stdout.stderr)
        .color(true);

    string testFilePath;
    string databaseFile;

    if (args.length != 3) {
        log.e("Не было передано необходимое количество параметров для запуска программы");
        return EXIT_FAILURE;
    }

    databaseFile = args[1];
    testFilePath = args[2];

    const string pattern = "^((( |\\t)*\\#( |\\t)*)(.*[^\\s]))|((( |\\t)*\\?( |\\t)*)(.*[^\\s]))"
        ~ "|((( |\\t)*-( |\\t)*)(.*[^\\s]))|((( |\\t)*\\+( |\\t)*)(.*[^\\s]))$";
    
    File testFile;

    try {
        testFile = File(testFilePath, "r");
    } catch (Exception e) {
        log.w("Unable to open the test file " ~ testFilePath);
        log.e(e);
        return EXIT_FAILURE;
    }

    dbliteConnect(databaseFile);

    auto regular = regex(pattern, "m");

    struct Answer {
        string text;
        bool right;

        // ToDo
        bool addToDB() {
            return false;
        }
    }

    struct Question {
        string text;
        Answer[int] answers;

        ulong getCount() {
            return answers.length;
        }

        bool isValid() {
            return answers.length > 1;
        }
        // ToDo
        bool addToDB() {
            return false;
        }
    }

    struct Theme {
        string text;
        Question[int] questions;

        ulong getCount() {
            return questions.length;
        }

        bool isValid() {
            return questions.length > 1;
        }

        // ToDo
        bool addToDB() {
            return false;
        }

        void print() {
            writeln("Количество вопросов: %s".format(this.getCount()));

            foreach (question; this.questions.byKeyValue.array.sort!((a, b) => a.key < b.key)) {
                writeln("\tВопрос №%d: %s".format(question.key, question.value.text));
                writeln("\tКоличество ответов: %d".format(question.value.getCount()));
                if (question.value.isValid())
                    foreach (answer; question.value.answers.byKeyValue.array.sort!((a, b) => a.key < b.key)) {
                        writeln("\t\tОтвет №%d: %s".format(answer.key, answer.value.text));
                    }
                else
                    writeln("\t\tНедостаточно количества ответов");
            }
        }
    }

    Theme theme;

    int numQuestion;
    int numAnswer;

    while (!testFile.eof())
    {
        string line = testFile.readln();
        auto match = matchFirst(line, regular);

        if (match.length == 0)
            continue;

        if (match[GROUP_THEME].length)
        {
            theme.text = match[GROUP_THEME_TEXT];
            continue;
        }

        if (match[GROUP_QUESTION].length)
        {
            numAnswer = 0;
            theme.questions[++numQuestion] = Question(match[GROUP_QUESTION_TEXT]);
            continue;
        }

        if (match[GROUP_ANSWER].length)
        {
            theme.questions[numQuestion].answers[++numAnswer] = Answer(match[GROUP_ANSWER_TEXT], false);
            continue;
        }

        if (match[GROUP_ANSWER_RIGHT].length)
        {
            theme.questions[numQuestion].answers[++numAnswer] = Answer(match[GROUP_ANSWER_RIGHT_TEXT], true);
            continue;
        }
    }

    theme.print();

    return EXIT_SUCCESS;
}