import { Injectable, NotFoundException } from '@nestjs/common';
import { and, desc, eq, isNull, sql } from 'drizzle-orm';
import { db } from '../db/client';
import { organizations } from '../db/schema';
import { AuditService } from '../audit/audit.service';
import { OutboxService } from '../events/outbox.service';
import type { AuthenticatedSession } from '../auth/tenant.guard';
import type { CreateOrganizationDto, UpdateOrganizationDto } from './dto';

/** Domeniile se normalizeaza la stocare (blueprint 11.6): lowercase, fara schema/path. */
function normalizeDomain(domain: string | undefined): string | undefined {
  if (!domain) {
    return undefined;
  }
  return domain
    .trim()
    .toLowerCase()
    .replace(/^https?:\/\//, '')
    .replace(/\/.*$/, '');
}

@Injectable()
export class OrganizationsService {
  constructor(
    private readonly outbox: OutboxService,
    private readonly audit: AuditService,
  ) {}

  async list(session: AuthenticatedSession) {
    return db.query.organizations.findMany({
      where: and(eq(organizations.tenantId, session.tenantId), isNull(organizations.deletedAt)),
      orderBy: desc(organizations.createdAt),
    });
  }

  async getById(session: AuthenticatedSession, id: string) {
    const row = await db.query.organizations.findFirst({
      where: and(
        eq(organizations.id, id),
        eq(organizations.tenantId, session.tenantId),
        isNull(organizations.deletedAt),
      ),
    });
    if (!row) {
      throw new NotFoundException('Organization not found');
    }
    return row;
  }

  async create(session: AuthenticatedSession, dto: CreateOrganizationDto) {
    return this.outbox.withTransaction(async (tx) => {
      const [row] = await tx
        .insert(organizations)
        .values({
          tenantId: session.tenantId,
          name: dto.name,
          legalName: dto.legalName,
          country: dto.country,
          registryId: dto.registryId,
          domain: normalizeDomain(dto.domain),
          externalIds: dto.externalIds ?? {},
        })
        .returning();
      await this.audit.record(tx, {
        tenantId: session.tenantId,
        actorId: session.userId,
        action: 'organization.created',
        resource: `organization:${row.id}`,
      });
      await this.outbox.record(tx, {
        tenantId: session.tenantId,
        eventType: 'organization.created',
        subjectId: row.id,
        payload: { name: row.name, country: row.country },
      });
      return row;
    });
  }

  async update(session: AuthenticatedSession, id: string, dto: UpdateOrganizationDto) {
    await this.getById(session, id);
    return this.outbox.withTransaction(async (tx) => {
      const [row] = await tx
        .update(organizations)
        .set({
          ...(dto.name !== undefined ? { name: dto.name } : {}),
          ...(dto.legalName !== undefined ? { legalName: dto.legalName } : {}),
          ...(dto.country !== undefined ? { country: dto.country } : {}),
          ...(dto.registryId !== undefined ? { registryId: dto.registryId } : {}),
          ...(dto.domain !== undefined ? { domain: normalizeDomain(dto.domain) } : {}),
          ...(dto.externalIds !== undefined ? { externalIds: dto.externalIds } : {}),
          updatedAt: new Date(),
          version: sql`${organizations.version} + 1`,
        })
        .where(and(eq(organizations.id, id), eq(organizations.tenantId, session.tenantId)))
        .returning();
      await this.audit.record(tx, {
        tenantId: session.tenantId,
        actorId: session.userId,
        action: 'organization.updated',
        resource: `organization:${id}`,
      });
      return row;
    });
  }

  /** Soft delete (blueprint 12.1); hard delete doar prin workflow controlat, nu prin API. */
  async softDelete(session: AuthenticatedSession, id: string) {
    await this.getById(session, id);
    await this.outbox.withTransaction(async (tx) => {
      await tx
        .update(organizations)
        .set({ deletedAt: new Date() })
        .where(and(eq(organizations.id, id), eq(organizations.tenantId, session.tenantId)));
      await this.audit.record(tx, {
        tenantId: session.tenantId,
        actorId: session.userId,
        action: 'organization.deleted',
        resource: `organization:${id}`,
      });
    });
    return { deleted: true };
  }
}