<?php

use PHPUnit\Framework\TestCase;

/**
 * SystemControllerHelpersTest — Pure logic tests for the static helper methods
 * in SystemController (humanBytes, diskColor, logLineClass,
 * statusLabel, statusClass).
 *
 * These are stateless, no-IO functions.
 */
class SystemControllerHelpersTest extends TestCase
{
    // ── humanBytes() ──────────────────────────────────────────────────────────

    public function testHumanBytesZero(): void
    {
        $this->assertSame('0.0 KB', SystemController::humanBytes(0));
    }

    public function testHumanBytesBelowOneKB(): void
    {
        $this->assertSame('1.0 KB', SystemController::humanBytes(1023));
    }

    public function testHumanBytesOneKB(): void
    {
        $this->assertSame('1.0 KB', SystemController::humanBytes(1024));
    }

    public function testHumanBytesOneMB(): void
    {
        // threshold is > 1048576, so exactly 1048576 is still KB
        $this->assertSame('1,024.0 KB', SystemController::humanBytes(1048576));
    }

    public function testHumanBytesOneGB(): void
    {
        // threshold is > 1073741824, so exactly that is still MB
        $this->assertSame('1,024.0 MB', SystemController::humanBytes(1073741824));
    }

    public function testHumanBytes1523MB(): void
    {
        $bytes = (int)(1.5 * 1048576);
        $this->assertSame('1.5 MB', SystemController::humanBytes($bytes));
    }

    public function testHumanBytes2500GB(): void
    {
        $bytes = (int)(2.5 * 1073741824);
        $this->assertSame('2.5 GB', SystemController::humanBytes($bytes));
    }

    // ── diskColor() ───────────────────────────────────────────────────────────

    public function testDiskColorBelowWarning(): void
    {
        $this->assertSame('#4caf50', SystemController::diskColor(0));
        $this->assertSame('#4caf50', SystemController::diskColor(50));
        $this->assertSame('#4caf50', SystemController::diskColor(70));
    }

    public function testDiskColorWarning(): void
    {
        $this->assertSame('#ffc107', SystemController::diskColor(71));
        $this->assertSame('#ffc107', SystemController::diskColor(85));
    }

    public function testDiskColorCritical(): void
    {
        $this->assertSame('#e05555', SystemController::diskColor(86));
        $this->assertSame('#e05555', SystemController::diskColor(99));
        $this->assertSame('#e05555', SystemController::diskColor(100));
    }

    // ── logLineClass() ────────────────────────────────────────────────────────

    public function testLogLineClassCrit(): void
    {
        $this->assertSame('log-crit', SystemController::logLineClass('[crit] Fatal'));
        $this->assertSame('log-crit', SystemController::logLineClass('[emerg] Emergency'));
        $this->assertSame('log-crit', SystemController::logLineClass('[alert] Alert'));
    }

    public function testLogLineClassError(): void
    {
        $this->assertSame('log-error', SystemController::logLineClass('[error] An error'));
    }

    public function testLogLineClassWarn(): void
    {
        $this->assertSame('log-warn', SystemController::logLineClass('[warn] Warning'));
    }

    public function testLogLineClassNotice(): void
    {
        $this->assertSame('log-notice', SystemController::logLineClass('[notice] Notice'));
    }

    public function testLogLineClassHttp500(): void
    {
        // Matches " 500 " pattern in nginx-style log
        $this->assertSame('log-error', SystemController::logLineClass('GET / " 500 123 "'));
        $this->assertSame('log-error', SystemController::logLineClass('GET / " 404 123 "'));
    }

    public function testLogLineClassHttp300(): void
    {
        $this->assertSame('log-notice', SystemController::logLineClass('GET / " 302 456 "'));
    }

    public function testLogLineClassDefault(): void
    {
        $this->assertSame('', SystemController::logLineClass('Just a plain log message'));
        $this->assertSame('', SystemController::logLineClass('GET / " 200 123 "'));
    }

    // ── statusLabel() ─────────────────────────────────────────────────────────

    public function testStatusLabelActive(): void
    {
        $this->assertSame('● En ligne', SystemController::statusLabel('active'));
    }

    public function testStatusLabelInactive(): void
    {
        $this->assertSame('○ Inactif', SystemController::statusLabel('inactive'));
    }

    public function testStatusLabelFailed(): void
    {
        $this->assertSame('✕ Erreur', SystemController::statusLabel('failed'));
    }

    public function testStatusLabelWarn(): void
    {
        $this->assertSame('⚠ Attention', SystemController::statusLabel('warn'));
    }

    public function testStatusLabelUnknown(): void
    {
        $this->assertSame('? Inconnu', SystemController::statusLabel('unknown'));
        $this->assertSame('? Inconnu', SystemController::statusLabel('bogus'));
    }

    // ── statusClass() ─────────────────────────────────────────────────────────

    public function testStatusClassOk(): void
    {
        $this->assertSame('status-ok', SystemController::statusClass('active'));
    }

    public function testStatusClassWarn(): void
    {
        $this->assertSame('status-warn', SystemController::statusClass('inactive'));
        $this->assertSame('status-warn', SystemController::statusClass('warn'));
    }

    public function testStatusClassError(): void
    {
        $this->assertSame('status-err', SystemController::statusClass('failed'));
    }

    public function testStatusClassUnknown(): void
    {
        $this->assertSame('status-unknown', SystemController::statusClass('bogus'));
    }
}