<?php declare(strict_types=1);

require_once('common.php');

$taskMatrix = require 'taskMatrix.php';

$mondays = [
    (int)(new DateTimeImmutable('first monday of this month'))->format('d'),
    (int)(new DateTimeImmutable('second monday of this month'))->format('d'),
    (int)(new DateTimeImmutable('third monday of this month'))->format('d'),
    (int)(new DateTimeImmutable('fourth monday of this month'))->format('d'),
];

$currentMonth = (int)(new DateTimeImmutable())->format('n');
$currentDayOfMonth = closest((new DateTimeImmutable())->format('d'), $mondays);
$currentSeason = getSeason($currentMonth);
$currentYear = (int)(new DateTimeImmutable())->format('Y');
$currentWeekOfMonth = array_search($currentDayOfMonth, $mondays);

$extractTasks = function($tasks, $path) {
    return array_merge($tasks, file_exists($path) ? lines(trim(file_get_contents($path))) : []);
};

$unfinishedForYear = array_diff(
     array_merge(...map(
         function($season) use ($taskMatrix) {
             return getTasksForTheSeason($season, $taskMatrix);
         }
     )(['summer', 'autumn', 'winter', 'spring'])),
     array_reduce(getFilePathsForYear($currentYear), $extractTasks, [])
);

$unfinishedForSeason = array_diff(
    getTasksForTheSeason($currentSeason, $taskMatrix),
    array_reduce(getFilePathsForSeason($currentYear, $currentSeason), $extractTasks, [])
);

$unfinishedForMonth = array_diff(
    getTasksForTheMonth($currentMonth, $taskMatrix),
    array_reduce(getFilePathsForMonth($currentYear, $currentMonth), $extractTasks, [])
);

$filePathForWeek = getFilePathForWeek($currentYear, $currentMonth, $currentWeekOfMonth);
$unfinishedForWeek = array_diff(
    getTasksForTheWeek($currentWeekOfMonth, $currentMonth, $taskMatrix),
    file_exists($filePathForWeek) ? lines(trim(file_get_contents($filePathForWeek))) : []
);

//EOY => (EOM & EOW) & !EOS
//EOS => (EOM & EOW) & !EOY
$taskLists = array_merge(
    isEndOfYear($currentYear, $currentMonth, $currentDayOfMonth) ? [unlines(map(getStringAndCode)($unfinishedForYear))] : [],
    isEndOfSeason($currentYear, $currentMonth, $currentDayOfMonth) ? [unlines(map(getStringAndCode)($unfinishedForSeason))] : [],
    isEndOfMonth($currentYear, $currentMonth, $currentDayOfMonth) ? [unlines(map(getStringAndCode)($unfinishedForMonth))] : [],
    [unlines(map(getStringAndCode)($unfinishedForWeek))]
);

$seasonName = ucfirst($currentSeason);
$goodOrBad = function($string, $goodOrBad) {
    return getString($string . ($goodOrBad ? '' : 'Good'));
};

$taskMessages = [
    [$goodOrBad('endOfWeek', $unfinishedForWeek)],
    [
        $goodOrBad('endOfMonth', $unfinishedForMonth),
        $goodOrBad('andAlsoEndOfWeek', $unfinishedForWeek)
    ],
    [
        $goodOrBad('endOf' . $seasonName, $unfinishedForSeason),
        $goodOrBad('andAlsoEndOfMonth', $unfinishedForMonth),
        $goodOrBad('finallyEndOfWeek', $unfinishedForWeek)
    ],
    [
        $goodOrBad('endOfYear', $unfinishedForYear),
        $goodOrBad('andAlsoEndOfMonth', $unfinishedForMonth),
        $goodOrBad('finallyEndOfWeek', $unfinishedForWeek)
    ]
];

$messages = zipWith(
    function($message, $list) {
        return ununlines(
            array_merge(
                is_array($message) ? $message : [$message],
                [$list]
            )
        );
    },
    // Similar magic to tasks.php
    $taskMessages[
        isEndOfMonth($currentYear, $currentMonth, $currentDayOfMonth) +
        isEndOfSeason($currentYear, $currentMonth, $currentDayOfMonth) +
        (isEndOfYear($currentYear, $currentMonth, $currentDayOfMonth) ? 2 : 0) // EOY is independant of EOS, to get the right index need to add 2 instead of 1.
    ],
    $taskLists
);

foreach ($messages as $message) {
    sendToGroupChat($message);
    sleep(rand(2,4));
}