import 'reflect-metadata';
import { afterAll, beforeAll, describe, expect, it } from 'vitest';
import { Test, type TestingModule } from '@nestjs/testing';
import { FastifyAdapter, type NestFastifyApplication } from '@nestjs/platform-fastify';
import { BadRequestException, ForbiddenException } from '@nestjs/common';
import request from 'supertest';
import { signAccessToken, type PermissionKey } from '@lisglosips/auth';
import { AUDIT_REPOSITORY, type AuditEntryInput, type AuditRepository } from './audit/audit.repository.js';
import { IDENTITY_REPOSITORY, type IdentityRepository } from './security/identity.repository.js';
import type { CurrentUser } from './security/security.metadata.js';
import {
  ROLES_REPOSITORY,
  type CreateRoleInput,
  type PermissionSummary,
  type RoleSummary,
  type RolesRepository,
  type UpdateRoleInput
} from './roles/roles.repository.js';
import {
  USERS_REPOSITORY,
  type CreateUserInput,
  type UpdateUserInput,
  type UserSummary,
  type UsersRepository
} from './users/users.repository.js';

class MemoryIdentityRepository implements IdentityRepository {
  users = new Map<string, CurrentUser>();

  async findCurrentUserById(userId: string): Promise<CurrentUser | null> {
    return this.users.get(userId) ?? null;
  }
}

class MemoryAuditRepository implements AuditRepository {
  entries: AuditEntryInput[] = [];

  async write(input: AuditEntryInput): Promise<void> {
    this.entries.push(input);
  }
}

class MemoryRolesRepository implements RolesRepository {
  private readonly roles = new Map<string, RoleSummary>();
  private readonly permissions: PermissionSummary[] = [{ id: 'users.manage', module: 'users', action: 'manage', description: null }];

  constructor() {
    this.roles.set('rol_builtin', this.summary({ id: 'rol_builtin', name: '系统管理员', builtIn: true, userCount: 1 }));
    this.roles.set('rol_used', this.summary({ id: 'rol_used', name: '运营', userCount: 1 }));
    this.roles.set('rol_blocked', this.summary({ id: 'rol_blocked', name: '仍在使用', userCount: 1 }));
    this.roles.set('rol_empty', this.summary({ id: 'rol_empty', name: '空角色', userCount: 0 }));
  }

  async listRoles(): Promise<RoleSummary[]> {
    return [...this.roles.values()];
  }

  async listPermissions(): Promise<PermissionSummary[]> {
    return this.permissions;
  }

  async createRole(input: CreateRoleInput): Promise<RoleSummary> {
    const role = this.summary({ id: 'rol_created', name: input.name, description: input.description ?? null });
    this.roles.set(role.id, role);
    return role;
  }

  async updateRole(roleId: string, input: UpdateRoleInput): Promise<RoleSummary> {
    const current = this.roles.get(roleId) ?? this.summary({ id: roleId, name: 'Missing Role' });
    const role: RoleSummary = {
      ...current,
      name: input.name ?? current.name,
      description: input.description === undefined ? current.description : input.description,
      status: input.status ?? current.status,
      permissionIds: input.permissionIds ?? current.permissionIds,
      updatedAt: new Date('2026-06-24T08:00:00.000Z')
    };
    this.roles.set(role.id, role);
    return role;
  }

  async softDeleteRole(roleId: string): Promise<RoleSummary> {
    const role = this.roles.get(roleId);
    if (!role) {
      throw new BadRequestException({ code: 'ROLE_NOT_FOUND', message: 'Role not found.' });
    }
    if (role.builtIn) {
      throw new ForbiddenException({ code: 'BUILT_IN_ROLE_PROTECTED', message: 'Built-in roles are protected.' });
    }
    if (role.userCount > 0) {
      throw new BadRequestException({ code: 'ROLE_HAS_USERS', message: 'Role with active users cannot be deleted.' });
    }
    const deleted: RoleSummary = { ...role, status: 'DISABLED', updatedAt: new Date('2026-06-24T08:00:00.000Z') };
    this.roles.delete(roleId);
    return deleted;
  }

  decrementUserCount(roleIds: string[]) {
    for (const roleId of roleIds) {
      const role = this.roles.get(roleId);
      if (role) {
        this.roles.set(roleId, { ...role, userCount: Math.max(0, role.userCount - 1) });
      }
    }
  }

  private summary(input: { id: string; name: string; description?: string | null; builtIn?: boolean; userCount?: number }): RoleSummary {
    return {
      id: input.id,
      name: input.name,
      description: input.description ?? null,
      builtIn: input.builtIn ?? false,
      status: 'ENABLED',
      permissionIds: ['users.manage'],
      userCount: input.userCount ?? 0,
      createdAt: new Date('2026-06-24T07:00:00.000Z'),
      updatedAt: new Date('2026-06-24T07:00:00.000Z')
    };
  }
}

class MemoryUsersRepository implements UsersRepository {
  private readonly users = new Map<string, UserSummary>();

  constructor(private readonly roles: MemoryRolesRepository) {
    this.users.set('usr_seed', this.summary({ id: 'usr_seed', username: 'seed', displayName: 'Seed User', roleIds: ['rol_used'], roles: ['运营'] }));
  }

  async list(): Promise<UserSummary[]> {
    return [...this.users.values()];
  }

  async create(input: CreateUserInput): Promise<UserSummary> {
    const user = this.summary({ id: 'usr_created', username: input.username, displayName: input.displayName, roleIds: input.roleIds });
    this.users.set(user.id, user);
    return user;
  }

  async update(userId: string, input: UpdateUserInput): Promise<UserSummary> {
    const current = this.users.get(userId) ?? this.summary({ id: userId, username: 'missing', displayName: 'Missing' });
    const updated: UserSummary = {
      ...current,
      displayName: input.displayName ?? current.displayName,
      phone: input.phone === undefined ? current.phone : input.phone,
      email: input.email === undefined ? current.email : input.email,
      status: input.status ?? current.status,
      roleIds: input.roleIds ?? current.roleIds,
      updatedAt: new Date('2026-06-24T08:00:00.000Z')
    };
    this.users.set(userId, updated);
    return updated;
  }

  async resetPassword(userId: string): Promise<UserSummary> {
    return this.users.get(userId) ?? this.summary({ id: userId, username: 'missing', displayName: 'Missing' });
  }

  async softDelete(userId: string): Promise<UserSummary> {
    const user = this.users.get(userId) ?? this.summary({ id: userId, username: 'missing', displayName: 'Missing' });
    const deleted: UserSummary = { ...user, status: 'DISABLED', roleIds: [], roles: [], updatedAt: new Date('2026-06-24T08:00:00.000Z') };
    this.users.delete(userId);
    this.roles.decrementUserCount(user.roleIds);
    return deleted;
  }

  private summary(input: { id: string; username: string; displayName: string; roleIds?: string[]; roles?: string[] }): UserSummary {
    return {
      id: input.id,
      username: input.username,
      displayName: input.displayName,
      phone: null,
      email: null,
      status: 'ENABLED',
      requirePasswordChange: false,
      lastLoginAt: null,
      roles: input.roles ?? [],
      roleIds: input.roleIds ?? [],
      createdAt: new Date('2026-06-24T07:00:00.000Z'),
      updatedAt: new Date('2026-06-24T07:00:00.000Z')
    };
  }
}

describe('S40 users and roles delete API', () => {
  let app: NestFastifyApplication;
  let audit: MemoryAuditRepository;

  const tokenFor = (userId: string) =>
    signAccessToken(
      {
        sub: userId,
        username: userId,
        roles: ['test'],
        typ: 'access'
      },
      {
        secret: 'test-only-access-token-secret-min-32-bytes',
        issuer: 'lisglosips-api',
        audience: 'lisglosips-web',
        ttlSeconds: 900
      }
    );

  beforeAll(async () => {
    process.env.DATABASE_URL = 'mysql://lisglosips_app@127.0.0.1:3306/lisglosips';
    process.env.REDIS_URL = 'redis://127.0.0.1:6379/0';
    process.env.LISGLOSIPS_LOG_LEVEL = 'silent';
    process.env.AUTH_ACCESS_TOKEN_SECRET = 'test-only-access-token-secret-min-32-bytes';

    const identities = new MemoryIdentityRepository();
    audit = new MemoryAuditRepository();
    const roles = new MemoryRolesRepository();

    identities.users.set('usr_ops', {
      id: 'usr_ops',
      username: 'ops',
      roles: ['运营管理员'],
      permissions: ['users.view', 'users.manage', 'roles.view', 'roles.manage'] as PermissionKey[]
    });
    identities.users.set('usr_viewer', {
      id: 'usr_viewer',
      username: 'viewer',
      roles: ['只读'],
      permissions: ['users.view', 'roles.view'] as PermissionKey[]
    });

    const { AppModule } = await import('./app.module.js');
    const moduleFixture: TestingModule = await Test.createTestingModule({
      imports: [AppModule]
    })
      .overrideProvider(IDENTITY_REPOSITORY)
      .useValue(identities)
      .overrideProvider(AUDIT_REPOSITORY)
      .useValue(audit)
      .overrideProvider(ROLES_REPOSITORY)
      .useValue(roles)
      .overrideProvider(USERS_REPOSITORY)
      .useValue(new MemoryUsersRepository(roles))
      .compile();

    app = moduleFixture.createNestApplication<NestFastifyApplication>(new FastifyAdapter({ logger: false }));
    app.setGlobalPrefix('api/v2');
    await app.init();
    await app.getHttpAdapter().getInstance().ready();
  }, 30000);

  afterAll(async () => {
    await app?.close();
  });

  it('rejects delete operations without manage permissions', async () => {
    await request(app.getHttpServer()).delete('/api/v2/users/usr_seed').set('Authorization', `Bearer ${tokenFor('usr_viewer')}`).expect(403);
    await request(app.getHttpServer()).delete('/api/v2/roles/rol_empty').set('Authorization', `Bearer ${tokenFor('usr_viewer')}`).expect(403);
  });

  it('soft deletes users with an audit entry', async () => {
    await request(app.getHttpServer())
      .delete('/api/v2/users/usr_seed')
      .set('Authorization', `Bearer ${tokenFor('usr_ops')}`)
      .expect(200)
      .expect((response) => {
        expect(response.body).toMatchObject({ id: 'usr_seed', status: 'DISABLED', roleIds: [] });
      });

    expect(audit.entries.some((entry) => entry.module === 'users' && entry.action === 'delete' && entry.objectId === 'usr_seed')).toBe(true);
  });

  it('protects built-in and still-used roles, then deletes an empty custom role with audit', async () => {
    await request(app.getHttpServer()).delete('/api/v2/roles/rol_builtin').set('Authorization', `Bearer ${tokenFor('usr_ops')}`).expect(403);

    await request(app.getHttpServer())
      .delete('/api/v2/roles/rol_blocked')
      .set('Authorization', `Bearer ${tokenFor('usr_ops')}`)
      .expect(400)
      .expect((response) => {
        expect(response.body).toMatchObject({ code: 'ROLE_HAS_USERS' });
      });

    await request(app.getHttpServer())
      .delete('/api/v2/roles/rol_empty')
      .set('Authorization', `Bearer ${tokenFor('usr_ops')}`)
      .expect(200)
      .expect((response) => {
        expect(response.body).toMatchObject({ id: 'rol_empty', status: 'DISABLED' });
      });

    expect(audit.entries.some((entry) => entry.module === 'roles' && entry.action === 'delete' && entry.objectId === 'rol_empty')).toBe(true);
  });
});