<?php
declare(strict_types=1);

namespace Unsupervised\Schedular\Tests\Unit\Update;

use Brain\Monkey\Filters;
use Brain\Monkey\Functions;
use Unsupervised\Schedular\Tests\Unit\TestCase;
use Unsupervised\Schedular\Update\UpdateChecker;

class UpdateCheckerTest extends TestCase
{
    private const PLUGIN_FILE = 'unsupervised-schedular/unsupervised-schedular.php';
    private const PACKAGE_URL = 'https://git.unsupervised.ca/attachments/abc123';

    /** Stub a successful Gitea API response with the given decoded body. */
    private function stubApiResponse(int $code, mixed $body): void
    {
        Functions\when('wp_remote_get')->justReturn(['response' => ['code' => $code]]);
        Functions\when('is_wp_error')->justReturn(false);
        Functions\when('wp_remote_retrieve_response_code')->justReturn($code);
        Functions\when('wp_remote_retrieve_body')->justReturn(json_encode($body));
    }

    private function release(string $tag, array $assets): array
    {
        return ['tag_name' => $tag, 'assets' => $assets];
    }

    private function zipAsset(string $name = 'unsupervised-schedular-9.9.9.zip'): array
    {
        return ['name' => $name, 'browser_download_url' => self::PACKAGE_URL];
    }

    /**
     * The payload provideUpdate() returns when no newer release is offered.
     * Core files this under the transient's `no_update` list, which is what
     * makes the "Enable auto-updates" toggle appear. USC_VERSION is 1.0.0 in
     * the test bootstrap.
     */
    private function noUpdatePayload(): array
    {
        return [
            'slug'    => 'unsupervised-schedular',
            'version' => '1.0.0',
            'url'     => UpdateChecker::REPO_URL,
            'package' => '',
        ];
    }

    public function testRegisterHooksHostnameFilter(): void
    {
        Filters\expectAdded('update_plugins_git.unsupervised.ca')->once();
        Filters\expectAdded('plugin_row_meta')->once();

        (new UpdateChecker())->register();
    }

    public function testFilterRowMetaReplacesViewDetailsLinkForThisPlugin(): void
    {
        Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);

        $meta = [
            'Version 1.0.0',
            '<a href="https://wordpress.org/plugin-install.php?...&plugin=unsupervised-schedular" class="thickbox open-plugin-details-modal">View details</a>',
        ];

        $result = (new UpdateChecker())->filterRowMeta($meta, self::PLUGIN_FILE);

        // Core's thickbox modal link is gone.
        foreach ($result as $item) {
            self::assertStringNotContainsString('open-plugin-details-modal', $item);
        }
        // Replaced with a new-tab link to the Gitea release tag for USC_VERSION (1.0.0 in tests).
        self::assertStringContainsString(
            UpdateChecker::REPO_URL . '/releases/tag/v1.0.0',
            end($result)
        );
        self::assertStringContainsString('target="_blank"', end($result));
    }

    public function testFilterRowMetaLeavesOtherPluginsUntouched(): void
    {
        Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);

        $meta = ['<a href="#" class="thickbox open-plugin-details-modal">View details</a>'];

        $result = (new UpdateChecker())->filterRowMeta($meta, 'other-plugin/other-plugin.php');

        self::assertSame($meta, $result);
    }

    public function testOffersUpdateWhenReleaseIsNewer(): void
    {
        Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
        Functions\when('get_transient')->justReturn(false);
        // USC_VERSION is 1.0.0 in the test bootstrap.
        $this->stubApiResponse(200, $this->release('v9.9.9', [$this->zipAsset()]));
        Functions\expect('set_transient')->once()->with(
            UpdateChecker::TRANSIENT,
            ['version' => '9.9.9', 'package' => self::PACKAGE_URL],
            \Mockery::type('int')
        );

        $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);

        self::assertSame(
            [
                'slug'    => 'unsupervised-schedular',
                'version' => '9.9.9',
                'url'     => UpdateChecker::REPO_URL,
                'package' => self::PACKAGE_URL,
            ],
            $result
        );
    }

    public function testReturnsUpdateUnchangedForOtherPlugins(): void
    {
        Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
        Functions\expect('wp_remote_get')->never();

        $result = (new UpdateChecker())->provideUpdate(false, [], 'other-plugin/other-plugin.php');

        self::assertFalse($result);
    }

    public function testNoUpdatePayloadWhenReleaseIsNotNewer(): void
    {
        Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
        Functions\when('get_transient')->justReturn(false);
        Functions\when('set_transient')->justReturn(true);
        $this->stubApiResponse(200, $this->release('v1.0.0', [$this->zipAsset('unsupervised-schedular-1.0.0.zip')]));

        $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);

        // Current version → core files this under `no_update` so the
        // auto-update toggle stays visible; no package to install.
        self::assertSame($this->noUpdatePayload(), $result);
    }

    public function testUsesCachedReleaseWithoutHittingApi(): void
    {
        Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
        Functions\when('get_transient')->justReturn(['version' => '2.0.0', 'package' => self::PACKAGE_URL]);
        Functions\expect('wp_remote_get')->never();
        Functions\expect('set_transient')->never();

        $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);

        self::assertIsArray($result);
        self::assertSame('2.0.0', $result['version']);
    }

    public function testApiFailureIsCachedAndStillReportsUpdateSupport(): void
    {
        Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
        Functions\when('get_transient')->justReturn(false);
        Functions\when('wp_remote_get')->justReturn('irrelevant');
        Functions\when('is_wp_error')->justReturn(true);
        // A failed lookup is cached too, so a down Gitea is not re-polled
        // on every admin page load.
        Functions\expect('set_transient')->once()->with(
            UpdateChecker::TRANSIENT,
            ['version' => '', 'package' => ''],
            \Mockery::type('int')
        );

        $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);

        // Even with the lookup failed we still return the `no_update` payload,
        // so the auto-update toggle does not flicker away during a Gitea blip.
        self::assertSame($this->noUpdatePayload(), $result);
    }

    public function testNon200ResponseReturnsNoUpdatePayload(): void
    {
        Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
        Functions\when('get_transient')->justReturn(false);
        Functions\when('set_transient')->justReturn(true);
        $this->stubApiResponse(404, ['message' => 'Not Found']);

        $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);

        self::assertSame($this->noUpdatePayload(), $result);
    }

    public function testPicksFirstZipAssetAndSkipsOthers(): void
    {
        Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
        Functions\when('get_transient')->justReturn(false);
        Functions\when('set_transient')->justReturn(true);
        $this->stubApiResponse(200, $this->release('v9.9.9', [
            ['name' => 'release-notes.pdf', 'browser_download_url' => 'https://example.test/notes.pdf'],
            $this->zipAsset(),
        ]));

        $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);

        self::assertIsArray($result);
        self::assertSame(self::PACKAGE_URL, $result['package']);
    }

    public function testReleaseWithoutZipAssetOffersNoUpdatePayload(): void
    {
        Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
        Functions\when('get_transient')->justReturn(false);
        Functions\when('set_transient')->justReturn(true);
        $this->stubApiResponse(200, $this->release('v9.9.9', [
            ['name' => 'release-notes.pdf', 'browser_download_url' => 'https://example.test/notes.pdf'],
        ]));

        $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);

        // No installable package means no update to offer, but we still keep
        // the plugin in `no_update` so the toggle shows.
        self::assertSame($this->noUpdatePayload(), $result);
    }

    public function testMalformedApiBodyOffersNoUpdatePayload(): void
    {
        Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
        Functions\when('get_transient')->justReturn(false);
        Functions\when('set_transient')->justReturn(true);
        Functions\when('wp_remote_get')->justReturn(['response' => ['code' => 200]]);
        Functions\when('is_wp_error')->justReturn(false);
        Functions\when('wp_remote_retrieve_response_code')->justReturn(200);
        Functions\when('wp_remote_retrieve_body')->justReturn('not json');

        $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);

        self::assertSame($this->noUpdatePayload(), $result);
    }
}