<?php
declare(strict_types=1);

namespace Unsupervised\Schedular\Tests\Unit\Auth;

use Brain\Monkey\Functions;
use Unsupervised\Schedular\Auth\AccessSettings;
use Unsupervised\Schedular\Auth\RoleManager;
use Unsupervised\Schedular\Tests\Unit\TestCase;

class RoleManagerTest extends TestCase
{
    private function roleManager(bool $studio = true, bool $instructor = true): RoleManager
    {
        $access = \Mockery::mock(AccessSettings::class);
        $access->allows('adminsAreStudioAdmins')->andReturn($studio);
        $access->allows('adminsAreInstructors')->andReturn($instructor);

        return new RoleManager($access);
    }

    public function testRegisterAddsInitHookAndCapFilter(): void
    {
        Functions\expect('add_action')
            ->once()
            ->with('init', \Mockery::any());

        Functions\expect('add_filter')
            ->once()
            ->with('user_has_cap', \Mockery::any(), 10, 1);

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

    public function testGrantsStudioCapsToAdministrators(): void
    {
        $result = $this->roleManager()->grantStudioCapsToAdministrators(['manage_options' => true]);

        foreach (RoleManager::STUDIO_ADMIN_CAPS as $cap) {
            self::assertTrue($result[$cap], "administrator should be granted {$cap}");
        }
    }

    public function testGrantsInstructorCapsToAdministrators(): void
    {
        $result = $this->roleManager()->grantStudioCapsToAdministrators(['manage_options' => true]);

        // A single-instructor studio owner runs as an administrator and also
        // teaches, so they get the instructor caps — notably manage_availability,
        // which is not part of the studio-admin set.
        self::assertTrue($result[RoleManager::CAP_MANAGE_AVAILABILITY], 'administrator should be able to manage availability');
        foreach (RoleManager::INSTRUCTOR_CAPS as $cap) {
            self::assertTrue($result[$cap], "administrator should be granted {$cap}");
        }
    }

    public function testStudioGrantDisabledWithholdsStudioCapsFromAdministrators(): void
    {
        $result = $this->roleManager(studio: false)->grantStudioCapsToAdministrators(['manage_options' => true]);

        // manage_instructors is studio-only, so it disappears when the grant is off.
        self::assertArrayNotHasKey(RoleManager::CAP_MANAGE_INSTRUCTORS, $result);
        // Instructor caps remain because that grant is still on.
        self::assertTrue($result[RoleManager::CAP_MANAGE_AVAILABILITY]);
    }

    public function testInstructorGrantDisabledWithholdsInstructorCapsFromAdministrators(): void
    {
        $result = $this->roleManager(instructor: false)->grantStudioCapsToAdministrators(['manage_options' => true]);

        // manage_availability is instructor-only, so it disappears when the grant is off.
        self::assertArrayNotHasKey(RoleManager::CAP_MANAGE_AVAILABILITY, $result);
        // Studio caps remain because that grant is still on.
        self::assertTrue($result[RoleManager::CAP_MANAGE_INSTRUCTORS]);
    }

    public function testDoesNotGrantCapsToNonAdministrators(): void
    {
        $result = $this->roleManager()->grantStudioCapsToAdministrators(['read' => true]);

        self::assertArrayNotHasKey(RoleManager::CAP_MANAGE_OFFERINGS, $result);
        self::assertSame(['read' => true], $result);
    }

    public function testCreateRolesSkipsExistingRoles(): void
    {
        Functions\when('get_role')->alias(static fn() => new \stdClass());
        Functions\expect('add_role')->never();

        (new RoleManager())->createRoles();
    }

    public function testCreateRolesAddsInstructorRoleWithCorrectCaps(): void
    {
        Functions\when('get_role')->alias(static function (string $role): ?object {
            return $role === RoleManager::INSTRUCTOR ? null : new \stdClass();
        });

        Functions\expect('add_role')
            ->once()
            ->with(
                RoleManager::INSTRUCTOR,
                \Mockery::any(),
                \Mockery::on(static function (array $caps): bool {
                    return ($caps['read'] ?? false) === true
                        && ($caps[RoleManager::CAP_MANAGE_AVAILABILITY] ?? false) === true
                        && ($caps[RoleManager::CAP_VIEW_LESSONS] ?? false) === true;
                })
            );

        (new RoleManager())->createRoles();
    }

    public function testCreateRolesAddsStudioAdminRoleWithCorrectCaps(): void
    {
        Functions\when('get_role')->alias(static function (string $role): ?object {
            return $role === RoleManager::STUDIO_ADMIN ? null : new \stdClass();
        });

        Functions\expect('add_role')
            ->once()
            ->with(
                RoleManager::STUDIO_ADMIN,
                \Mockery::any(),
                \Mockery::on(static function (array $caps): bool {
                    return ($caps['read'] ?? false) === true
                        && ($caps[RoleManager::CAP_MANAGE_INSTRUCTORS] ?? false) === true
                        && ($caps[RoleManager::CAP_MANAGE_OFFERINGS] ?? false) === true
                        && ($caps[RoleManager::CAP_MANAGE_POLICIES] ?? false) === true
                        && ($caps[RoleManager::CAP_MANAGE_BILLING] ?? false) === true
                        && ($caps[RoleManager::CAP_VIEW_ALL_PAYMENTS] ?? false) === true;
                })
            );

        (new RoleManager())->createRoles();
    }

    public function testCreateRolesAddsStudentRoleWithCorrectCaps(): void
    {
        Functions\when('get_role')->alias(static function (string $role): ?object {
            return $role === RoleManager::STUDENT ? null : new \stdClass();
        });

        Functions\expect('add_role')
            ->once()
            ->with(
                RoleManager::STUDENT,
                \Mockery::any(),
                \Mockery::on(static function (array $caps): bool {
                    return ($caps['read'] ?? false) === true
                        && ($caps[RoleManager::CAP_BOOK_LESSON] ?? false) === true
                        && ($caps[RoleManager::CAP_VIEW_LESSONS] ?? false) === true;
                })
            );

        (new RoleManager())->createRoles();
    }

    /**
     * The predicate every staff-side "register this person" path shares. It is
     * deliberately the role and not `book_lesson`, so the two accounts that have
     * that capability withheld — a guardian's child and an unapproved signup — are
     * still people the studio can act for.
     */
    public function testIsStudentAcceptsAnyHolderOfTheStudentRole(): void
    {
        Functions\when('get_userdata')->justReturn($this->userWithRoles([RoleManager::STUDENT]));

        self::assertTrue(RoleManager::isStudent(5));
    }

    public function testIsStudentRejectsSomeoneWhoIsNotAStudent(): void
    {
        Functions\when('get_userdata')->justReturn($this->userWithRoles([RoleManager::INSTRUCTOR]));

        self::assertFalse(RoleManager::isStudent(5));
    }

    public function testIsStudentRejectsAnAccountThatNoLongerExists(): void
    {
        Functions\when('get_userdata')->justReturn(false);

        self::assertFalse(RoleManager::isStudent(5));
    }

    public function testIsStudentRejectsNoOneChosenWithoutLookingAnyoneUp(): void
    {
        Functions\expect('get_userdata')->never();

        self::assertFalse(RoleManager::isStudent(0));
    }

    /** @param list<string> $roles */
    private function userWithRoles(array $roles): \WP_User
    {
        $user        = \Mockery::mock(\WP_User::class);
        $user->ID    = 5;
        $user->roles = $roles;

        return $user;
    }
}