<?php

declare(strict_types=1);

class Tournament
{
    private const HEADER = "Team                           | MP |  W |  D |  L |  P";

    public function tally(string $input): string
    {
        if ($input === "") {
            return self::HEADER;
        }

        $teams = [];

        foreach ($this->parseInput($input) as [$team1, $team2, $result]) {
            $this->initTeam($teams, $team1);
            $this->initTeam($teams, $team2);

            $this->updateMatchesPlayed($teams, $team1, $team2);
            $this->updateMatchResult($teams, $team1, $team2, $result);
        }

        $this->sortTeams($teams);

        return $this->generateTable($teams);
    }

    private function parseInput(string $input): array
    {
        $rows = explode("\n", $input);
        $matches = [];

        foreach ($rows as $row) {
            if ($row === "") {
                continue;
            }

            $matches[] = explode(";", $row);
        }

        return $matches;
    }

    private function initTeam(array &$teams, string $team): void
    {
        if (!isset($teams[$team])) {
            $teams[$team] = [
                "MP" => 0,
                "W" => 0,
                "D" => 0,
                "L" => 0,
                "P" => 0,
            ];
        }
    }

    private function updateMatchesPlayed(
        array &$teams,
        string $team1,
        string $team2,
    ): void {
        $teams[$team1]["MP"]++;
        $teams[$team2]["MP"]++;
    }

    private function updateMatchResult(
        array &$teams,
        string $team1,
        string $team2,
        string $result,
    ): void {
        switch ($result) {
            case "win":
                $teams[$team1]["W"]++;
                $teams[$team2]["L"]++;
                $teams[$team1]["P"] += 3;
                break;

            case "loss":
                $teams[$team2]["W"]++;
                $teams[$team1]["L"]++;
                $teams[$team2]["P"] += 3;
                break;

            case "draw":
                $teams[$team1]["D"]++;
                $teams[$team2]["D"]++;
                $teams[$team1]["P"]++;
                $teams[$team2]["P"]++;
                break;
        }
    }

    private function sortTeams(array &$teams): void
    {
        uksort($teams, function ($teamA, $teamB) use ($teams) {
            return $teams[$teamB]["P"] <=> $teams[$teamA]["P"] ?:
                strcmp($teamA, $teamB);
        });
    }

    private function generateTable(array $teams): string
    {
        $output = self::HEADER;

        foreach ($teams as $team => $stats) {
            $output .= sprintf(
                "\n%-31s| %2d | %2d | %2d | %2d | %2d",
                $team,
                $stats["MP"],
                $stats["W"],
                $stats["D"],
                $stats["L"],
                $stats["P"],
            );
        }

        return $output;
    }
}