<?php

declare(strict_types=1);

namespace Magdev\WpPrometheus\Tests\Unit\Admin;

use Magdev\WpPrometheus\Admin\DashboardProvider;
use Magdev\WpPrometheus\Tests\Helpers\GlobalFunctionState;
use Magdev\WpPrometheus\Tests\Unit\TestCase;
use PHPUnit\Framework\Attributes\CoversClass;
use PHPUnit\Framework\Attributes\Test;

#[CoversClass(DashboardProvider::class)]
class DashboardProviderTest extends TestCase
{
    private DashboardProvider $provider;

    protected function setUp(): void
    {
        parent::setUp();
        $this->provider = new DashboardProvider();
    }

    // ── register_dashboard() - Validation ────────────────────────────

    #[Test]
    public function register_with_inline_json_succeeds(): void
    {
        $result = $this->provider->register_dashboard('my-dashboard', [
            'title' => 'My Dashboard',
            'json'  => '{"panels":[]}',
        ]);

        $this->assertTrue($result);
    }

    #[Test]
    public function register_rejects_empty_slug(): void
    {
        $result = $this->provider->register_dashboard('', [
            'title' => 'Test',
            'json'  => '{}',
        ]);

        $this->assertFalse($result);
    }

    #[Test]
    public function register_rejects_invalid_slug_characters(): void
    {
        // sanitize_key removes all non [a-z0-9_-] characters
        // A slug like '!@#' becomes '' after sanitize_key
        $result = $this->provider->register_dashboard('!@#', [
            'title' => 'Test',
            'json'  => '{}',
        ]);

        $this->assertFalse($result);
    }

    #[Test]
    public function register_rejects_duplicate_builtin_slug(): void
    {
        $result = $this->provider->register_dashboard('wordpress-overview', [
            'title' => 'Override Built-in',
            'json'  => '{}',
        ]);

        $this->assertFalse($result);
    }

    #[Test]
    public function register_rejects_duplicate_registered_slug(): void
    {
        $this->provider->register_dashboard('my-dashboard', [
            'title' => 'First',
            'json'  => '{}',
        ]);

        $result = $this->provider->register_dashboard('my-dashboard', [
            'title' => 'Second',
            'json'  => '{}',
        ]);

        $this->assertFalse($result);
    }

    #[Test]
    public function register_requires_title(): void
    {
        $result = $this->provider->register_dashboard('no-title', [
            'json' => '{}',
        ]);

        $this->assertFalse($result);
    }

    #[Test]
    public function register_requires_file_or_json(): void
    {
        $result = $this->provider->register_dashboard('no-content', [
            'title' => 'No Content',
        ]);

        $this->assertFalse($result);
    }

    #[Test]
    public function register_rejects_both_file_and_json(): void
    {
        $fileExists = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'file_exists');
        $fileExists->expects($this->any())->willReturn(true);

        $isReadable = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'is_readable');
        $isReadable->expects($this->any())->willReturn(true);

        $realpath = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'realpath');
        $realpath->expects($this->any())->willReturnArgument(0);

        $result = $this->provider->register_dashboard('both', [
            'title' => 'Both',
            'file'  => '/tmp/wordpress/wp-content/plugins/test/dashboard.json',
            'json'  => '{}',
        ]);

        $this->assertFalse($result);
    }

    #[Test]
    public function register_file_requires_absolute_path(): void
    {
        $result = $this->provider->register_dashboard('relative', [
            'title' => 'Relative Path',
            'file'  => 'relative/path/dashboard.json',
        ]);

        $this->assertFalse($result);
    }

    #[Test]
    public function register_file_must_exist(): void
    {
        $fileExists = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'file_exists');
        $fileExists->expects($this->any())->willReturn(false);

        $result = $this->provider->register_dashboard('missing-file', [
            'title' => 'Missing File',
            'file'  => '/tmp/wordpress/wp-content/plugins/test/nonexistent.json',
        ]);

        $this->assertFalse($result);
    }

    #[Test]
    public function register_file_rejects_path_traversal(): void
    {
        $fileExists = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'file_exists');
        $fileExists->expects($this->any())->willReturn(true);

        $isReadable = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'is_readable');
        $isReadable->expects($this->any())->willReturn(true);

        $realpath = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'realpath');
        $realpath->expects($this->any())->willReturnArgument(0);

        $result = $this->provider->register_dashboard('evil', [
            'title' => 'Evil Dashboard',
            'file'  => '/etc/passwd',
        ]);

        $this->assertFalse($result);
    }

    #[Test]
    public function register_file_accepts_path_under_wp_content(): void
    {
        $fileExists = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'file_exists');
        $fileExists->expects($this->any())->willReturn(true);

        $isReadable = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'is_readable');
        $isReadable->expects($this->any())->willReturn(true);

        $realpath = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'realpath');
        $realpath->expects($this->any())->willReturnArgument(0);

        $result = $this->provider->register_dashboard('valid-file', [
            'title' => 'Valid File Dashboard',
            'file'  => '/tmp/wordpress/wp-content/plugins/my-plugin/dashboard.json',
        ]);

        $this->assertTrue($result);
    }

    #[Test]
    public function register_rejects_invalid_inline_json(): void
    {
        $result = $this->provider->register_dashboard('bad-json', [
            'title' => 'Bad JSON',
            'json'  => '{invalid json',
        ]);

        $this->assertFalse($result);
    }

    #[Test]
    public function register_sets_source_to_third_party(): void
    {
        $this->provider->register_dashboard('ext-dashboard', [
            'title'  => 'Extension',
            'json'   => '{}',
            'plugin' => 'My Plugin',
        ]);

        $this->assertTrue($this->provider->is_third_party('ext-dashboard'));
    }

    // ── get_available() ──────────────────────────────────────────────

    #[Test]
    public function get_available_includes_builtin_dashboards(): void
    {
        $fileExists = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'file_exists');
        $fileExists->expects($this->any())->willReturn(true);

        $available = $this->provider->get_available();

        $this->assertArrayHasKey('wordpress-overview', $available);
        $this->assertArrayHasKey('wordpress-runtime', $available);
        $this->assertArrayHasKey('wordpress-woocommerce', $available);
    }

    #[Test]
    public function get_available_includes_registered_dashboards(): void
    {
        $fileExists = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'file_exists');
        $fileExists->expects($this->any())->willReturn(true);

        $this->provider->register_dashboard('custom-dash', [
            'title' => 'Custom',
            'json'  => '{"panels":[]}',
        ]);

        $available = $this->provider->get_available();
        $this->assertArrayHasKey('custom-dash', $available);
    }

    #[Test]
    public function get_available_excludes_builtin_with_missing_file(): void
    {
        $fileExists = $this->getFunctionMock('Magdev\\WpPrometheus\\Admin', 'file_exists');
        $fileExists->expects($this->any())->willReturn(false);

        $available = $this->provider->get_available();

        // Built-in dashboards should be excluded (files don't exist).
        $this->assertArrayNotHasKey('wordpress-overview', $available);
    }

    // ── is_third_party() ─────────────────────────────────────────────

    #[Test]
    public function builtin_dashboard_is_not_third_party(): void
    {
        $this->assertFalse($this->provider->is_third_party('wordpress-overview'));
    }

    #[Test]
    public function registered_dashboard_is_third_party(): void
    {
        $this->provider->register_dashboard('ext-dash', [
            'title' => 'Extension Dashboard',
            'json'  => '{}',
        ]);

        $this->assertTrue($this->provider->is_third_party('ext-dash'));
    }

    #[Test]
    public function unknown_slug_is_not_third_party(): void
    {
        $this->assertFalse($this->provider->is_third_party('nonexistent'));
    }

    // ── get_plugin_name() ────────────────────────────────────────────

    #[Test]
    public function get_plugin_name_returns_name_for_registered(): void
    {
        $this->provider->register_dashboard('ext-dash', [
            'title'  => 'Extension',
            'json'   => '{}',
            'plugin' => 'My Awesome Plugin',
        ]);

        $this->assertSame('My Awesome Plugin', $this->provider->get_plugin_name('ext-dash'));
    }

    #[Test]
    public function get_plugin_name_returns_null_for_builtin(): void
    {
        $this->assertNull($this->provider->get_plugin_name('wordpress-overview'));
    }

    #[Test]
    public function get_plugin_name_returns_null_when_empty(): void
    {
        $this->provider->register_dashboard('no-plugin', [
            'title' => 'No Plugin',
            'json'  => '{}',
        ]);

        $this->assertNull($this->provider->get_plugin_name('no-plugin'));
    }

    // ── get_filename() ───────────────────────────────────────────────

    #[Test]
    public function get_filename_returns_file_for_builtin(): void
    {
        $filename = $this->provider->get_filename('wordpress-overview');
        $this->assertSame('wordpress-overview.json', $filename);
    }

    #[Test]
    public function get_filename_returns_slug_json_for_inline(): void
    {
        $this->provider->register_dashboard('my-dash', [
            'title' => 'My Dashboard',
            'json'  => '{}',
        ]);

        $this->assertSame('my-dash.json', $this->provider->get_filename('my-dash'));
    }

    #[Test]
    public function get_filename_returns_null_for_unknown(): void
    {
        $this->assertNull($this->provider->get_filename('nonexistent'));
    }

    // ── get_metadata() ───────────────────────────────────────────────

    #[Test]
    public function get_metadata_returns_builtin_data(): void
    {
        $metadata = $this->provider->get_metadata('wordpress-overview');

        $this->assertIsArray($metadata);
        $this->assertSame('WordPress Overview', $metadata['title']);
        $this->assertSame('builtin', $metadata['source']);
    }

    #[Test]
    public function get_metadata_returns_registered_data(): void
    {
        $this->provider->register_dashboard('ext-dash', [
            'title'       => 'Extension',
            'description' => 'A test dashboard',
            'json'        => '{}',
            'plugin'      => 'TestPlugin',
        ]);

        $metadata = $this->provider->get_metadata('ext-dash');

        $this->assertIsArray($metadata);
        $this->assertSame('Extension', $metadata['title']);
        $this->assertSame('third-party', $metadata['source']);
        $this->assertSame('TestPlugin', $metadata['plugin']);
    }

    #[Test]
    public function get_metadata_returns_null_for_unknown(): void
    {
        $this->assertNull($this->provider->get_metadata('nonexistent'));
    }
}