<?php

namespace Tests\Feature\Mcp;

use App\Actions\Notifications\DeliverNotificationAction;
use App\Actions\ProjectTicketMetadata\InitializeProjectTicketMetadata;
use App\Actions\Tickets\SyncProjectTicketFieldValues;
use App\Enums\NotificationEventType;
use App\Mcp\Servers\KanbanGitServer;
use App\Mcp\Tools\CreateTicket;
use App\Models\NotificationAction;
use App\Models\Project;
use App\Models\Ticket;
use App\Models\TicketFieldDefinition;
use App\Models\TicketPriority;
use App\Models\TicketStatus;
use App\Models\TicketType;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\Queue;
use Illuminate\Testing\Fluent\AssertableJson;
use PHPUnit\Framework\Attributes\DataProvider;
use RuntimeException;
use Tests\TestCase;

class CreateTicketTest extends TestCase
{
    use RefreshDatabase;

    private Project $project;

    private User $user;

    protected function setUp(): void
    {
        parent::setUp();

        $this->user = User::factory()->create();
        $this->project = Project::factory()->create(['key' => 'CORE']);
        app(InitializeProjectTicketMetadata::class)->handle($this->project);
        $this->syncProjectPermissions($this->project, $this->user, ['write']);
    }

    public function test_application_key_can_discover_creation_fields_and_required_inputs(): void
    {
        $response = $this->withApplicationKey($this->user)->postJson('/mcp/kanbangit', [
            'id' => 1,
            'jsonrpc' => '2.0',
            'method' => 'tools/list',
            'params' => [],
        ])->assertOk();

        $tool = collect($response->json('result.tools'))->firstWhere('name', 'create_ticket');

        $this->assertNotNull($tool);
        $this->assertFalse($tool['annotations']['destructiveHint']);
        $this->assertEqualsCanonicalizing([
            'project_id', 'title', 'ticket_type_id', 'ticket_status_id', 'ticket_priority_id',
        ], $tool['inputSchema']['required']);
        $this->assertEqualsCanonicalizing([
            'project_id', 'title', 'description', 'ticket_type_id', 'ticket_status_id',
            'ticket_priority_id', 'parent_ticket_id', 'assignee_user_id', 'author_user_id',
            'story_points', 'is_blocked', 'blocked_comment', 'acceptance_criteria', 'field_values',
        ], array_keys($tool['inputSchema']['properties']));
        $this->assertSame('integer', Arr::get($tool, 'inputSchema.properties.ticket_type_id.type'));
        $this->assertSame(['integer', 'null'], Arr::get($tool, 'inputSchema.properties.parent_ticket_id.type'));
        $this->assertSame('object', Arr::get($tool, 'inputSchema.properties.acceptance_criteria.items.type'));
        $this->assertSame('object', Arr::get($tool, 'inputSchema.properties.field_values.items.type'));
    }

    public function test_application_key_can_create_a_child_with_all_editable_fields(): void
    {
        $assignee = User::factory()->create();
        $author = User::factory()->create();
        $type = TicketType::factory()->for($this->project)->create(['name' => 'Bug', 'is_parent' => false, 'position' => 3]);
        $status = TicketStatus::factory()->for($this->project)->create(['name' => 'Ready', 'position' => 2]);
        $priority = TicketPriority::factory()->for($this->project)->create(['name' => 'High', 'position' => 2]);
        $parent = $this->parentTicket($this->project);
        $numberField = TicketFieldDefinition::factory()->for($this->project)->create(['field_type' => 'number']);
        $userField = TicketFieldDefinition::factory()->for($this->project)->create(['field_type' => 'user', 'position' => 2]);
        $this->syncProjectPermissions($this->project, $this->user, ['admin']);

        $this->withApplicationKey($this->user)->postJson('/mcp/kanbangit', [
            'id' => 2,
            'jsonrpc' => '2.0',
            'method' => 'tools/call',
            'params' => [
                'name' => 'create_ticket',
                'arguments' => $this->arguments([
                    'title' => 'Fix child ticket creation',
                    'description' => 'Created through MCP.',
                    'ticket_type_id' => $type->id,
                    'ticket_status_id' => $status->id,
                    'ticket_priority_id' => $priority->id,
                    'parent_ticket_id' => $parent->id,
                    'assignee_user_id' => $assignee->id,
                    'author_user_id' => $author->id,
                    'story_points' => 0,
                    'is_blocked' => true,
                    'blocked_comment' => 'Waiting for the dependency.',
                    'acceptance_criteria' => [
                        ['text' => 'Parent criterion', 'checked' => true, 'indent' => 0],
                        ['text' => 'Child criterion', 'checked' => false, 'indent' => 1],
                    ],
                    'field_values' => [
                        ['ticket_field_definition_id' => $numberField->id, 'value_number' => 2.5],
                        ['ticket_field_definition_id' => $userField->id, 'value_user_id' => $assignee->id],
                    ],
                ]),
            ],
        ])
            ->assertOk()
            ->assertJsonPath('result.isError', false)
            ->assertJsonPath('result.structuredContent.meta.message', 'CORE-2 was created.')
            ->assertJsonPath('result.structuredContent.data.ticket.ticket_type.id', $type->id)
            ->assertJsonPath('result.structuredContent.data.ticket.ticket_status.id', $status->id)
            ->assertJsonPath('result.structuredContent.data.ticket.ticket_priority.id', $priority->id)
            ->assertJsonPath('result.structuredContent.data.ticket.parent_ticket.id', $parent->id)
            ->assertJsonPath('result.structuredContent.data.ticket.author.id', $author->id)
            ->assertJsonPath('result.structuredContent.data.ticket.assignee.id', $assignee->id)
            ->assertJsonPath('result.structuredContent.data.ticket.is_blocked', true)
            ->assertJsonPath('result.structuredContent.data.ticket.acceptance_criteria.1.indent', 1)
            ->assertJsonCount(2, 'result.structuredContent.data.ticket.field_values');

        $ticket = $this->project->tickets()->where('ticket_key', 'CORE-2')->firstOrFail();
        $this->assertSame('Fix child ticket creation', $ticket->title);
        $this->assertSame('Created through MCP.', $ticket->description);
        $this->assertSame(0, $ticket->story_points);
        $this->assertSame('Waiting for the dependency.', $ticket->blocked_comment);
        $this->assertSame($parent->id, $ticket->parent_ticket_id);
        $this->assertSame($type->id, $ticket->ticket_type_id);
        $this->assertSame(2.5, $ticket->fieldValues()->where('ticket_field_definition_id', $numberField->id)->firstOrFail()->value_number);
        $this->assertSame($assignee->id, $ticket->fieldValues()->where('ticket_field_definition_id', $userField->id)->firstOrFail()->value_user_id);
        $criteria = $ticket->acceptanceCriteria()->get()->keyBy('text');
        $this->assertTrue($criteria['Parent criterion']->is_checked);
        $this->assertFalse($criteria['Child criterion']->is_checked);
        $this->assertSame($criteria['Parent criterion']->id, $criteria['Child criterion']->parent_acceptance_criterion_id);
        $this->assertDatabaseCount('ticket_worklog_entries', 1);
        $this->assertDatabaseHas('ticket_worklog_entries', [
            'ticket_id' => $ticket->id,
            'actor_id' => $this->user->id,
            'entry_type' => 'created',
        ]);
    }

    public function test_minimal_creation_defaults_optional_fields_and_generates_identity(): void
    {
        KanbanGitServer::actingAs($this->user)->tool(CreateTicket::class, $this->arguments([
            'ticket_key' => 'FORGED-999',
            'sequence_number' => 999,
            'id' => 999,
        ]))
            ->assertOk()
            ->assertStructuredContent(fn (AssertableJson $json) => $json
                ->where('data.ticket.ticket_key', 'CORE-1')
                ->where('data.ticket.sequence_number', 1)
                ->where('data.ticket.author_user_id', $this->user->id)
                ->where('data.ticket.assignee_user_id', null)
                ->where('data.ticket.parent_ticket_id', null)
                ->where('data.ticket.description', null)
                ->where('data.ticket.story_points', null)
                ->where('data.ticket.is_blocked', false)
                ->where('data.ticket.blocked_comment', null)
                ->where('data.ticket.acceptance_criteria', [])
                ->where('data.ticket.field_values', [])
                ->etc());

        $this->assertDatabaseCount('tickets', 1);
        $this->assertDatabaseMissing('tickets', ['id' => 999]);
    }

    public function test_admin_can_create_without_an_author_and_with_nullable_fields(): void
    {
        $this->syncProjectPermissions($this->project, $this->user, ['admin']);

        KanbanGitServer::actingAs($this->user)->tool(CreateTicket::class, $this->arguments([
            'author_user_id' => null,
            'assignee_user_id' => null,
            'parent_ticket_id' => null,
            'description' => null,
            'story_points' => null,
            'acceptance_criteria' => null,
            'field_values' => [],
            'is_blocked' => false,
            'blocked_comment' => 'Discard this when unblocked.',
        ]))
            ->assertOk()
            ->assertStructuredContent(fn (AssertableJson $json) => $json
                ->where('data.ticket.author_user_id', null)
                ->where('data.ticket.blocked_comment', null)
                ->where('data.ticket.acceptance_criteria', [])
                ->etc());
    }

    public function test_parent_enabled_tickets_can_also_be_children_and_checklists_use_defaults(): void
    {
        $parent = $this->parentTicket($this->project);

        KanbanGitServer::actingAs($this->user)->tool(CreateTicket::class, $this->arguments([
            'ticket_type_id' => $parent->ticket_type_id,
            'parent_ticket_id' => $parent->id,
            'author_user_id' => $this->user->id,
            'acceptance_criteria' => [['text' => '  A criterion  ']],
        ]))
            ->assertOk()
            ->assertStructuredContent(fn (AssertableJson $json) => $json
                ->where('data.ticket.ticket_type.is_parent', true)
                ->where('data.ticket.parent_ticket_id', $parent->id)
                ->where('data.ticket.acceptance_criteria.0.text', 'A criterion')
                ->where('data.ticket.acceptance_criteria.0.checked', false)
                ->where('data.ticket.acceptance_criteria.0.indent', 0)
                ->etc());
    }

    public function test_creation_requires_authentication_and_project_write_permission(): void
    {
        KanbanGitServer::tool(CreateTicket::class, $this->arguments())
            ->assertHasErrors(['Authentication required.']);

        foreach ([[], ['view']] as $permissions) {
            $this->syncProjectPermissions($this->project, $this->user, $permissions);
            KanbanGitServer::actingAs($this->user)->tool(CreateTicket::class, $this->arguments())
                ->assertHasErrors(['cannot update tickets']);
        }

        $this->assertDatabaseCount('tickets', 0);
    }

    public function test_non_admin_cannot_override_or_remove_the_author(): void
    {
        $author = User::factory()->create();

        foreach ([$author->id, null] as $authorId) {
            KanbanGitServer::actingAs($this->user)->tool(CreateTicket::class, $this->arguments([
                'author_user_id' => $authorId,
            ]))->assertHasErrors(['Only project admins can change the author.']);
        }

        $this->assertDatabaseCount('tickets', 0);
    }

    public function test_creation_rejects_foreign_project_metadata_and_parent(): void
    {
        $otherProject = Project::factory()->create();
        app(InitializeProjectTicketMetadata::class)->handle($otherProject);
        $parent = $this->parentTicket($otherProject);
        $field = TicketFieldDefinition::factory()->for($otherProject)->create(['field_type' => 'number']);
        $this->syncProjectPermissions($otherProject, $this->user, ['write']);

        foreach ([
            ['ticket_type_id' => $otherProject->ticketTypes()->firstOrFail()->id],
            ['ticket_status_id' => $otherProject->ticketStatuses()->firstOrFail()->id],
            ['ticket_priority_id' => $otherProject->ticketPriorities()->firstOrFail()->id],
            ['parent_ticket_id' => $parent->id],
            ['field_values' => [['ticket_field_definition_id' => $field->id, 'value_number' => 1]]],
        ] as $attributes) {
            KanbanGitServer::actingAs($this->user)->tool(CreateTicket::class, $this->arguments($attributes))
                ->assertHasErrors();
        }

        $this->assertSame(0, $this->project->tickets()->count());
        $this->assertDatabaseCount('ticket_worklog_entries', 0);
    }

    public function test_creation_rejects_a_parent_without_a_parent_enabled_type(): void
    {
        $parent = $this->parentTicket($this->project);
        $parent->update(['ticket_type_id' => $this->project->ticketTypes()->where('is_parent', false)->firstOrFail()->id]);

        KanbanGitServer::actingAs($this->user)->tool(CreateTicket::class, $this->arguments([
            'parent_ticket_id' => $parent->id,
        ]))->assertHasErrors(['Only tickets with a parent-enabled type']);

        $this->assertDatabaseCount('tickets', 1);
    }

    #[DataProvider('invalidArguments')]
    public function test_invalid_arguments_do_not_create_a_ticket(array $attributes): void
    {
        KanbanGitServer::actingAs($this->user)->tool(CreateTicket::class, $this->arguments($attributes))
            ->assertHasErrors();

        $this->assertDatabaseCount('tickets', 0);
        $this->assertDatabaseCount('acceptance_criteria', 0);
        $this->assertDatabaseCount('ticket_field_values', 0);
        $this->assertDatabaseCount('ticket_worklog_entries', 0);
    }

    /**
     * @return array<string, array{array<string, mixed>}>
     */
    public static function invalidArguments(): array
    {
        return [
            'missing project' => [['project_id' => null]],
            'unknown project' => [['project_id' => 999999]],
            'invalid project' => [['project_id' => 'invalid']],
            'missing title' => [['title' => null]],
            'blank title' => [['title' => '   ']],
            'long title' => [['title' => str_repeat('a', 256)]],
            'invalid description' => [['description' => []]],
            'missing type' => [['ticket_type_id' => null]],
            'unknown type' => [['ticket_type_id' => 999999]],
            'missing status' => [['ticket_status_id' => null]],
            'unknown status' => [['ticket_status_id' => 999999]],
            'missing priority' => [['ticket_priority_id' => null]],
            'unknown priority' => [['ticket_priority_id' => 999999]],
            'unknown parent' => [['parent_ticket_id' => 999999]],
            'unknown assignee' => [['assignee_user_id' => 999999]],
            'unknown author' => [['author_user_id' => 999999]],
            'negative estimate' => [['story_points' => -1]],
            'fractional estimate' => [['story_points' => 1.5]],
            'invalid blocked flag' => [['is_blocked' => 'yes']],
            'missing blocker reason' => [['is_blocked' => true]],
            'blank blocker reason' => [['is_blocked' => true, 'blocked_comment' => '  ']],
            'invalid checklist' => [['acceptance_criteria' => 'text']],
            'blank checklist text' => [['acceptance_criteria' => [['text' => ' ']]]],
            'invalid checklist flag' => [['acceptance_criteria' => [['text' => 'Test', 'checked' => 'yes']]]],
            'invalid checklist indent' => [['acceptance_criteria' => [['text' => 'Test', 'indent' => 9]]]],
            'unknown field' => [['field_values' => [['ticket_field_definition_id' => 999999, 'value_number' => 1]]]],
            'invalid fields' => [['field_values' => 'text']],
        ];
    }

    public function test_custom_fields_reject_duplicate_definitions_and_incompatible_or_invalid_values(): void
    {
        $numberField = TicketFieldDefinition::factory()->for($this->project)->create(['field_type' => 'number']);
        $userField = TicketFieldDefinition::factory()->for($this->project)->create(['field_type' => 'user', 'position' => 2]);

        foreach ([
            [['ticket_field_definition_id' => $numberField->id, 'value_number' => 1], ['ticket_field_definition_id' => $numberField->id, 'value_number' => 2]],
            [['ticket_field_definition_id' => $numberField->id, 'value_user_id' => $this->user->id]],
            [['ticket_field_definition_id' => $userField->id, 'value_number' => 2]],
            [['ticket_field_definition_id' => $numberField->id, 'value_number' => 'invalid']],
            [['ticket_field_definition_id' => $userField->id, 'value_user_id' => 999999]],
        ] as $fieldValues) {
            KanbanGitServer::actingAs($this->user)->tool(CreateTicket::class, $this->arguments([
                'field_values' => $fieldValues,
            ]))->assertHasErrors();
        }

        $this->assertDatabaseCount('tickets', 0);
        $this->assertDatabaseCount('ticket_field_values', 0);
    }

    public function test_zero_and_empty_custom_field_values_are_supported(): void
    {
        $numberField = TicketFieldDefinition::factory()->for($this->project)->create(['field_type' => 'number']);
        $userField = TicketFieldDefinition::factory()->for($this->project)->create(['field_type' => 'user', 'position' => 2]);

        KanbanGitServer::actingAs($this->user)->tool(CreateTicket::class, $this->arguments([
            'field_values' => [
                ['ticket_field_definition_id' => $numberField->id, 'value_number' => 0],
                ['ticket_field_definition_id' => $userField->id, 'value_user_id' => null],
            ],
        ]))->assertOk();

        $this->assertDatabaseCount('ticket_field_values', 1);
        $this->assertDatabaseHas('ticket_field_values', [
            'ticket_field_definition_id' => $numberField->id,
            'value_number' => 0,
            'value_user_id' => null,
        ]);
    }

    public function test_mcp_creation_queues_one_creation_notification_with_the_key_owner_as_actor(): void
    {
        $notificationAction = NotificationAction::factory()->webhook()->for($this->project)->create([
            'event_type' => NotificationEventType::TicketCreate,
        ]);
        Queue::fake();

        KanbanGitServer::actingAs($this->user)->tool(CreateTicket::class, $this->arguments())->assertOk();

        Queue::assertPushed(DeliverNotificationAction::class, 1);
        Queue::assertPushed(DeliverNotificationAction::class, fn (DeliverNotificationAction $job): bool => $job->notificationActionId === $notificationAction->id
            && $job->event->payload()->actorId === $this->user->id
            && $job->event->payload()->ticketKey === 'CORE-1'
            && $job->event->eventType() === NotificationEventType::TicketCreate);
        $this->assertDatabaseCount('notification_delivery_logs', 1);
        $this->assertDatabaseCount('ticket_worklog_entries', 1);
    }

    public function test_creation_rolls_back_if_custom_field_persistence_fails(): void
    {
        $field = TicketFieldDefinition::factory()->for($this->project)->create(['field_type' => 'number']);
        $this->mock(SyncProjectTicketFieldValues::class)
            ->shouldReceive('handle')->once()->andThrow(new RuntimeException('Unable to save fields.'));
        $this->expectException(RuntimeException::class);

        try {
            KanbanGitServer::actingAs($this->user)->tool(CreateTicket::class, $this->arguments([
                'acceptance_criteria' => [['text' => 'Criterion']],
                'field_values' => [['ticket_field_definition_id' => $field->id, 'value_number' => 1]],
            ]));
        } finally {
            $this->assertDatabaseCount('tickets', 0);
            $this->assertDatabaseCount('acceptance_criteria', 0);
            $this->assertDatabaseCount('ticket_field_values', 0);
            $this->assertDatabaseCount('ticket_worklog_entries', 0);
            $this->assertDatabaseCount('notification_delivery_logs', 0);
        }
    }

    /**
     * @param  array<string, mixed>  $overrides
     * @return array<string, mixed>
     */
    private function arguments(array $overrides = []): array
    {
        return [
            'project_id' => $this->project->id,
            'title' => 'MCP ticket',
            'ticket_type_id' => $this->project->ticketTypes()->where('is_parent', false)->firstOrFail()->id,
            'ticket_status_id' => $this->project->ticketStatuses()->firstOrFail()->id,
            'ticket_priority_id' => $this->project->ticketPriorities()->firstOrFail()->id,
            ...$overrides,
        ];
    }

    private function parentTicket(Project $project): Ticket
    {
        return Ticket::factory()->create([
            'project_id' => $project->id,
            'sequence_number' => 1,
            'ticket_key' => "{$project->key}-1",
            'ticket_type_id' => $project->ticketTypes()->where('is_parent', true)->firstOrFail()->id,
            'ticket_status_id' => $project->ticketStatuses()->firstOrFail()->id,
            'ticket_priority_id' => $project->ticketPriorities()->firstOrFail()->id,
        ]);
    }
}