import {
  BadRequestException,
  ForbiddenException,
  Injectable,
  NotFoundException,
} from '@nestjs/common';
import type {
  ActivityDto,
  ActivityFieldValues,
  ActivityFilter,
  ActivitySummaryDto,
  ActivityStageCountsDto,
  CreateActivityRequest,
  PaginatedResponse,
  UpdateActivityRequest,
} from '@mento/shared';
import { Prisma } from '@prisma/client';
import { PrismaService } from '../prisma/prisma.service';
import { NotificationsService } from '../notifications/notifications.service';
import { AutomationsService } from '../automations/automations.service';
import { MessageAutomationsService } from '../message-automations/message-automations.service';
import {
  type Actor,
  activityAccessWhere,
  dealAccessWhere,
  ownerWhere,
} from '../common/record-scope';
import { normalizeTags } from '../common/tags';
import { GamificationService } from '../gamification/gamification.service';
import { tehranDayKey } from '../routines/routine-dates';
import { buildSearchWhere, ci } from '../common/search';
import { activityPriorWhere } from '../common/prior-archive';
import { ActivityStagesService, type StageDefaults } from './activity-stages.service';
import {
  ActivityTypesService,
  type SystemTypes,
  type TypeRow,
} from './activity-types.service';

type DtoContext = { stages?: StageDefaults; types?: SystemTypes };

type ActivityActor = Pick<Actor, 'userId' | 'role' | 'priorLens' | 'priorCutoff'>;

/** stageId = شناسهٔ مرحله یا 'all'؛ وقتی ست باشد فیلتر زمانی وضعیت را تحمیل نمی‌کند (جز عقب‌افتاده) */
type StageScope = { stageId: string };

type ListFacets = {
  type?: ActivityDto['type'];
  typeDefId?: string;
  status?: ActivityDto['status'];
  assigneeId?: string;
};

type ActivityRow = {
  id: string;
  type: ActivityDto['type'];
  status: ActivityDto['status'];
  priority: ActivityDto['priority'];
  title: string;
  description: string | null;
  dueAt: Date | null;
  durationMinutes: number | null;
  reminderAt: Date | null;
  reminderNotifyApp: boolean;
  reminderNotifySms: boolean;
  reminderSentAt: Date | null;
  completedAt: Date | null;
  importSource?: string;
  promotedFromPriorAt?: Date | null;
  tags: string[];
  createdAt: Date;
  updatedAt: Date;
  person: { id: string; firstName: string; lastName: string } | null;
  company: { id: string; name: string } | null;
  deal: { id: string; title: string } | null;
  lead?: { id: string; title: string } | null;
  assignee: { id: string; fullName: string } | null;
  assignees: Array<{ id: string; fullName: string }>;
  createdBy: { id: string; fullName: string } | null;
  stage?: { id: string; kind: ActivityDto['status'] } | null;
  typeDef?: { id: string; name: string; icon: string; color: string } | null;
  fields?: Prisma.JsonValue | null;
  participantIds?: string[];
};

const include = {
  stage: { select: { id: true, kind: true } },
  typeDef: { select: { id: true, name: true, icon: true, color: true } },
  person: { select: { id: true, firstName: true, lastName: true } },
  company: { select: { id: true, name: true } },
  deal: { select: { id: true, title: true } },
  lead: { select: { id: true, title: true } },
  assignee: { select: { id: true, fullName: true } },
  assignees: { select: { id: true, fullName: true }, orderBy: { fullName: 'asc' as const } },
  createdBy: { select: { id: true, fullName: true } },
} satisfies Prisma.ActivityInclude;

@Injectable()
export class ActivitiesService {
  constructor(
    private readonly prisma: PrismaService,
    private readonly notifications: NotificationsService,
    private readonly automations: AutomationsService,
    private readonly messageAutomations: MessageAutomationsService,
    private readonly stages: ActivityStagesService,
    private readonly types: ActivityTypesService,
    private readonly game: GamificationService,
  ) {}

  private async ctx(organizationId: string): Promise<DtoContext> {
    const [stages, types] = await Promise.all([
      this.stages.defaults(organizationId),
      this.types.system(organizationId),
    ]);
    return { stages, types };
  }

  async summary(
    organizationId: string,
    actor: ActivityActor,
    desk?: 'mine' | 'team',
  ): Promise<ActivitySummaryDto> {
    const { start, end } = dayBounds();
    const scope: Prisma.ActivityWhereInput =
      desk === 'mine'
        ? {
            OR: [
              { assigneeId: actor.userId },
              { assignees: { some: { id: actor.userId } } },
              { participantIds: { has: actor.userId } },
            ],
          }
        : activityAccessWhere(actor);
    const prior = activityPriorWhere(actor.priorLens, actor.priorCutoff);
    const [todayCount, overdueCount] = await Promise.all([
      this.prisma.activity.count({
        where: {
          AND: [
            {
              organizationId,
              ...scope,
              status: 'open',
              dueAt: { gte: start, lt: end },
            },
            prior,
          ],
        },
      }),
      this.prisma.activity.count({
        where: {
          AND: [
            {
              organizationId,
              ...scope,
              status: 'open',
              dueAt: { lt: start },
            },
            prior,
          ],
        },
      }),
    ]);
    const [today, overdue, upcoming] = await Promise.all([
      this.prisma.activity.findMany({
        where: {
          AND: [
            {
              organizationId,
              ...scope,
              status: 'open',
              dueAt: { gte: start, lt: end },
            },
            prior,
          ],
        },
        include,
        orderBy: [{ dueAt: 'asc' }, { createdAt: 'desc' }],
        take: 20,
      }),
      this.prisma.activity.findMany({
        where: {
          AND: [
            {
              organizationId,
              ...scope,
              status: 'open',
              dueAt: { lt: start },
            },
            prior,
          ],
        },
        include,
        orderBy: [{ dueAt: 'asc' }],
        take: 20,
      }),
      this.prisma.activity.findMany({
        where: {
          AND: [
            {
              organizationId,
              ...scope,
              status: 'open',
              OR: [{ dueAt: { gte: end } }, { dueAt: null }],
            },
            prior,
          ],
        },
        include,
        orderBy: [{ dueAt: 'asc' }, { createdAt: 'desc' }],
        take: 10,
      }),
    ]);

    const ctx = await this.ctx(organizationId);
    return {
      today: today.map((row) => this.toDto(row, ctx)),
      overdue: overdue.map((row) => this.toDto(row, ctx)),
      upcoming: upcoming.map((row) => this.toDto(row, ctx)),
      todayCount,
      overdueCount,
    };
  }

  async list(
    organizationId: string,
    actor: ActivityActor,
    filter: ActivityFilter = 'today',
    q?: string,
    page = 1,
    limit = 50,
    entity?: {
      personId?: string;
      companyId?: string;
      dealId?: string;
      leadId?: string;
    },
    range?: {
      from?: string;
      to?: string;
    },
    desk?: 'mine' | 'team',
    facets?: ListFacets,
    stageScope?: StageScope,
  ): Promise<PaginatedResponse<ActivityDto>> {
    const typeRows = await this.types.rows(organizationId);
    const where = this.buildWhere(
      organizationId,
      actor,
      filter,
      q,
      entity,
      range,
      desk,
      facets,
      stageScope,
      typeRows,
    );
    if (stageScope && stageScope.stageId !== 'all') {
      (where.AND as Prisma.ActivityWhereInput[]).push(
        await this.stages.whereForStage(organizationId, stageScope.stageId),
      );
    }
    const ctx: DtoContext = {
      stages: await this.stages.defaults(organizationId),
      types: this.types.systemOf(typeRows),
    };
    const take = Math.min(Math.max(limit, 1), 200);
    const [rows, total] = await this.prisma.$transaction([
      this.prisma.activity.findMany({
        where,
        include,
        orderBy: [{ dueAt: 'asc' }, { createdAt: 'desc' }],
        skip: (page - 1) * take,
        take,
      }),
      this.prisma.activity.count({ where }),
    ]);

    return {
      items: rows.map((row) => this.toDto(row, ctx)),
      total,
      page,
      limit: take,
    };
  }

  /** تعداد فعالیت هر مرحله با همان فیلترهای لیست (زمان، جستجو، میز، نوع، کارشناس) */
  async stageCounts(
    organizationId: string,
    actor: ActivityActor,
    filter: ActivityFilter,
    q?: string,
    desk?: 'mine' | 'team',
    facets?: ListFacets,
  ): Promise<ActivityStageCountsDto> {
    const rows = await this.stages.rows(organizationId);
    const defaults = this.stages.defaultsOf(rows);
    const kindOf = new Map(rows.map((r) => [r.id, r.kind]));
    const where = this.buildWhere(
      organizationId,
      actor,
      filter,
      q,
      undefined,
      undefined,
      desk,
      facets,
      { stageId: 'all' },
      await this.types.rows(organizationId),
    );
    const groups = await this.prisma.activity.groupBy({
      by: ['status', 'stageId'],
      where,
      _count: { _all: true },
    });
    const counts: Record<string, number> = Object.fromEntries(rows.map((r) => [r.id, 0]));
    let total = 0;
    for (const g of groups) {
      const n = g._count._all;
      total += n;
      const target =
        g.stageId && kindOf.get(g.stageId) === g.status ? g.stageId : defaults[g.status];
      if (target) counts[target] = (counts[target] ?? 0) + n;
    }
    return { counts, total };
  }

  async moveToStage(
    organizationId: string,
    id: string,
    actor: ActivityActor,
    stageId: string,
  ): Promise<ActivityDto> {
    await this.ensureExists(organizationId, id, actor);
    const stage = await this.stages.get(organizationId, stageId);
    const existing = await this.prisma.activity.findFirst({
      where: { id, organizationId },
      select: { status: true, completedAt: true },
    });
    const row = await this.prisma.activity.update({
      where: { id },
      data: {
        stageId: stage.id,
        status: stage.kind,
        completedAt:
          stage.kind === 'done'
            ? existing?.status === 'done'
              ? existing.completedAt ?? new Date()
              : new Date()
            : stage.kind === 'open'
              ? null
              : undefined,
      },
      include,
    });
    if (stage.kind === 'done' && existing?.status !== 'done') {
      await this.fireDone(organizationId, row);
    }
    return this.toDto(row, await this.ctx(organizationId));
  }

  async get(
    organizationId: string,
    id: string,
    actor: ActivityActor,
  ): Promise<ActivityDto> {
    const row = await this.prisma.activity.findFirst({
      where: { id, organizationId, ...activityAccessWhere(actor) },
      include,
    });
    if (!row) throw new NotFoundException('فعالیت پیدا نشد');
    const dto = this.toDto(row, await this.ctx(organizationId));
    if (row.participantIds.length) {
      dto.participantUsers = await this.prisma.user.findMany({
        where: { id: { in: row.participantIds } },
        select: { id: true, fullName: true },
        orderBy: { fullName: 'asc' },
      });
    }
    return dto;
  }

  async create(
    organizationId: string,
    userId: string,
    dto: CreateActivityRequest,
    actor?: ActivityActor,
  ): Promise<ActivityDto> {
    const linkActor = actor ?? { userId, role: 'owner' };
    await this.assertLinks(organizationId, linkActor, dto);
    const assigneeIds = await this.normalizeAssigneeIds(
      organizationId,
      dto.assigneeIds?.length
        ? dto.assigneeIds
        : dto.assigneeId
          ? [dto.assigneeId]
          : [userId],
    );
    const assigneeId = assigneeIds[0] ?? userId;
    const initialStageId = emptyToNull(dto.stageId ?? null);
    const initialStage = initialStageId
      ? await this.stages.get(organizationId, initialStageId)
      : null;
    const resolved = await this.types.resolve(organizationId, {
      typeDefId: dto.typeDefId,
      type: dto.type,
    });
    const { fields, participantIds } = await this.types.sanitizeValues(
      organizationId,
      resolved.fields,
      dto.fields,
    );

    const row = await this.prisma.activity.create({
      data: {
        organizationId,
        ...(initialStage
          ? {
              stageId: initialStage.id,
              status: initialStage.kind,
              completedAt: initialStage.kind === 'done' ? new Date() : null,
            }
          : {}),
        title: dto.title.trim(),
        type: resolved.baseType,
        typeDefId: resolved.typeDefId,
        fields: fields as Prisma.InputJsonValue,
        participantIds,
        priority: dto.priority ?? 'medium',
        description: emptyToNull(dto.description),
        dueAt: dto.dueAt ? new Date(dto.dueAt) : null,
        durationMinutes: dto.durationMinutes ?? null,
        reminderAt: dto.reminderAt ? new Date(dto.reminderAt) : null,
        reminderNotifyApp: dto.reminderNotifyApp ?? true,
        reminderNotifySms: dto.reminderNotifySms ?? false,
        tags: normalizeTags(dto.tags),
        personId: emptyToNull(dto.personId ?? null),
        companyId: emptyToNull(dto.companyId ?? null),
        dealId: emptyToNull(dto.dealId ?? null),
        assigneeId,
        assignees: assigneeIds.length
          ? { connect: assigneeIds.map((id) => ({ id })) }
          : undefined,
        createdById: userId,
      },
      include,
    });

    for (const uid of assigneeIds) {
      await this.notifications.create({
        organizationId,
        userId: uid,
        type: 'activity_assigned',
        title: 'فعالیت جدید برای شما',
        body: row.title,
        link: `/activities/${row.id}`,
        entityType: 'activity',
        entityId: row.id,
      });
    }
    await this.notifyParticipants(
      organizationId,
      row,
      participantIds.filter((uid) => !assigneeIds.includes(uid) && uid !== userId),
    );

    await this.messageAutomations.onEvent('activity_created', {
      organizationId,
      entityType: 'activity',
      entityId: row.id,
      title: row.title,
      personId: row.person?.id ?? null,
      companyId: row.company?.id ?? null,
      dealId: row.deal?.id ?? null,
      assigneeId: row.assignee?.id ?? null,
      ownerId: row.assignee?.id ?? null,
    });
    const gameBase = {
      organizationId,
      userId,
      entityType: 'activity',
      entityId: row.id,
      entityTitle: row.title,
      facts: {
        activityType: row.type,
        typeName: row.typeDef?.name ?? null,
        priority: row.priority,
        hasDescription: !!row.description?.trim(),
      },
    };
    this.game.emit({ ...gameBase, event: 'ACTIVITY_CREATED' });
    if (row.type === 'call') this.game.emit({ ...gameBase, event: 'CALL_LOGGED' });
    if (row.type === 'meeting') this.game.emit({ ...gameBase, event: 'MEETING_CREATED' });
    if (initialStage?.kind === 'done') {
      await this.fireDone(organizationId, row);
    }

    return this.toDto(row, await this.ctx(organizationId));
  }

  async update(
    organizationId: string,
    id: string,
    actor: ActivityActor,
    dto: UpdateActivityRequest,
  ): Promise<ActivityDto> {
    await this.ensureExists(organizationId, id, actor);
    await this.assertLinks(organizationId, actor, dto);

    const existing = await this.prisma.activity.findFirst({
      where: { id, organizationId },
      select: { status: true, type: true, typeDefId: true, fields: true, participantIds: true },
    });
    const data: Prisma.ActivityUncheckedUpdateInput = {};
    if (dto.title !== undefined) data.title = dto.title.trim();
    let addedParticipants: string[] = [];
    const typeChanged = 'typeDefId' in dto || dto.type !== undefined;
    if (typeChanged || dto.fields !== undefined) {
      const resolved = await this.types.resolve(
        organizationId,
        typeChanged
          ? { typeDefId: dto.typeDefId, type: dto.type }
          : { typeDefId: existing?.typeDefId, type: existing?.type },
      );
      const { fields, participantIds } = await this.types.sanitizeValues(
        organizationId,
        resolved.fields,
        dto.fields ?? existing?.fields,
      );
      data.type = resolved.baseType;
      data.typeDefId = resolved.typeDefId;
      data.fields = fields as Prisma.InputJsonValue;
      data.participantIds = participantIds;
      const before = new Set(existing?.participantIds ?? []);
      addedParticipants = participantIds.filter((uid) => !before.has(uid) && uid !== actor.userId);
    }
    if (dto.priority !== undefined) data.priority = dto.priority;
    if ('description' in dto) data.description = emptyToNull(dto.description);
    if ('dueAt' in dto) data.dueAt = dto.dueAt ? new Date(dto.dueAt) : null;
    if ('durationMinutes' in dto) data.durationMinutes = dto.durationMinutes ?? null;
    if ('reminderAt' in dto) {
      const nextReminder = dto.reminderAt ? new Date(dto.reminderAt) : null;
      const current = await this.prisma.activity.findUnique({
        where: { id },
        select: { reminderAt: true },
      });
      const prevMs = current?.reminderAt?.getTime() ?? null;
      const nextMs = nextReminder?.getTime() ?? null;
      data.reminderAt = nextReminder;
      if (prevMs !== nextMs) data.reminderSentAt = null;
    }
    if (dto.reminderNotifyApp !== undefined) data.reminderNotifyApp = dto.reminderNotifyApp;
    if (dto.reminderNotifySms !== undefined) data.reminderNotifySms = dto.reminderNotifySms;
    if ('tags' in dto) data.tags = normalizeTags(dto.tags);
    if ('personId' in dto) data.personId = emptyToNull(dto.personId ?? null);
    if ('companyId' in dto) data.companyId = emptyToNull(dto.companyId ?? null);
    if ('dealId' in dto) data.dealId = emptyToNull(dto.dealId ?? null);
    let assigneeConnect: Array<{ id: string }> | undefined;
    if (dto.assigneeIds !== undefined) {
      const assigneeIds = await this.normalizeAssigneeIds(
        organizationId,
        dto.assigneeIds,
      );
      if (!assigneeIds.length) {
        throw new BadRequestException('حداقل یک مسئول لازم است');
      }
      data.assigneeId = assigneeIds[0]!;
      assigneeConnect = assigneeIds.map((uid) => ({ id: uid }));
    } else if ('assigneeId' in dto) {
      const assigneeId = emptyToNull(dto.assigneeId ?? null);
      if (assigneeId) await this.assertUserInOrg(organizationId, assigneeId);
      data.assigneeId = assigneeId;
      if (assigneeId) assigneeConnect = [{ id: assigneeId }];
      else assigneeConnect = [];
    }
    if (dto.status !== undefined) {
      data.status = dto.status;
      data.completedAt =
        dto.status === 'done' ? new Date() : dto.status === 'open' ? null : undefined;
    }

    const row = await this.prisma.activity.update({
      where: { id },
      data: {
        ...data,
        ...(assigneeConnect
          ? { assignees: { set: assigneeConnect } }
          : {}),
      },
      include,
    });
    if (addedParticipants.length) {
      const assigneeSet = new Set([
        ...(row.assignee ? [row.assignee.id] : []),
        ...row.assignees.map((a) => a.id),
      ]);
      await this.notifyParticipants(
        organizationId,
        row,
        addedParticipants.filter((uid) => !assigneeSet.has(uid)),
      );
    }
    if (dto.status === 'done' && existing?.status !== 'done') {
      await this.fireDone(organizationId, row);
    }
    return this.toDto(row, await this.ctx(organizationId));
  }

  async complete(
    organizationId: string,
    id: string,
    actor: ActivityActor,
  ): Promise<ActivityDto> {
    await this.ensureExists(organizationId, id, actor);
    const existing = await this.prisma.activity.findFirst({
      where: { id, organizationId },
      select: { status: true },
    });
    const row = await this.prisma.activity.update({
      where: { id },
      data: { status: 'done', completedAt: new Date() },
      include,
    });
    if (existing?.status !== 'done') {
      await this.fireDone(organizationId, row);
    }
    return this.toDto(row, await this.ctx(organizationId));
  }

  async promoteFromPrior(actor: Actor, id: string): Promise<ActivityDto> {
    if (
      (actor.priorLens !== 'current' && actor.priorLens !== 'archive') ||
      !actor.priorCutoff
    ) {
      throw new ForbiddenException('بایگانی اطلاعات قبل برای شما فعال نیست.');
    }

    const row = await this.prisma.activity.findFirst({
      where: {
        id,
        organizationId: actor.organizationId,
        ...activityAccessWhere(actor),
      },
      select: { id: true, createdAt: true, promotedFromPriorAt: true },
    });
    if (!row) throw new NotFoundException('فعالیت پیدا نشد');
    if (row.promotedFromPriorAt) {
      throw new BadRequestException('این فعالیت قبلاً منتقل شده است.');
    }
    if (row.createdAt >= actor.priorCutoff) {
      throw new BadRequestException('این فعالیت در بایگانی نیست.');
    }

    const updated = await this.prisma.activity.update({
      where: { id },
      data: { promotedFromPriorAt: new Date() },
      include,
    });
    return this.toDto(updated, await this.ctx(actor.organizationId));
  }

  async remove(
    organizationId: string,
    id: string,
    actor: ActivityActor,
  ): Promise<void> {
    await this.ensureExists(organizationId, id, actor);
    await this.prisma.activity.delete({ where: { id } });
  }

  private buildWhere(
    organizationId: string,
    actor: ActivityActor,
    filter: ActivityFilter,
    q?: string,
    entity?: {
      personId?: string;
      companyId?: string;
      dealId?: string;
      leadId?: string;
    },
    range?: {
      from?: string;
      to?: string;
    },
    desk?: 'mine' | 'team',
    facets?: ListFacets,
    stageScope?: StageScope,
    typeRows: TypeRow[] = [],
  ): Prisma.ActivityWhereInput {
    const { start, end } = dayBounds();
    const scope: Prisma.ActivityWhereInput =
      desk === 'mine'
        ? {
            OR: [
              { assigneeId: actor.userId },
              { assignees: { some: { id: actor.userId } } },
              { participantIds: { has: actor.userId } },
            ],
          }
        : activityAccessWhere(actor);
    const facetAssignee = facets?.assigneeId?.trim();
    const facetTypeDef = facets?.typeDefId?.trim();
    const andParts: Prisma.ActivityWhereInput[] = [
      scope,
      ...(facets?.type ? [{ type: facets.type }] : []),
      ...(facetTypeDef ? [this.types.whereForType(typeRows, facetTypeDef)] : []),
      ...(facets?.status ? [{ status: facets.status }] : []),
      ...(facetAssignee
        ? [
            {
              OR: [
                { assigneeId: facetAssignee },
                { assignees: { some: { id: facetAssignee } } },
              ],
            },
          ]
        : []),
      ...(entity?.personId ? [{ personId: entity.personId }] : []),
      ...(entity?.companyId ? [{ companyId: entity.companyId }] : []),
      ...(entity?.dealId ? [{ dealId: entity.dealId }] : []),
      ...(entity?.leadId ? [{ leadId: entity.leadId }] : []),
    ];
    const search = buildSearchWhere<Prisma.ActivityWhereInput>(q, (t) => [
      { title: ci(t) },
      { description: ci(t) },
      { tags: { has: t.replace(/^#/, '') } },
      {
        person: {
          OR: [
            { firstName: ci(t) },
            { lastName: ci(t) },
            { mobile: { contains: t } },
            { phone: { contains: t } },
          ],
        },
      },
      { company: { name: ci(t) } },
      { deal: { title: ci(t) } },
      { assignee: { fullName: ci(t) } },
      { assignees: { some: { fullName: ci(t) } } },
      ...typesMatching(t).map((type) => ({ type })),
      ...this.types.searchByName(typeRows, t),
    ]);
    if (search) andParts.push(search);
    andParts.push(activityPriorWhere(actor.priorLens, actor.priorCutoff));
    const base: Prisma.ActivityWhereInput = {
      organizationId,
      AND: andParts,
    };

    const fromDate = range?.from ? new Date(range.from) : null;
    const toDate = range?.to ? new Date(range.to) : null;
    if (fromDate || toDate) {
      return {
        ...base,
        dueAt: {
          ...(fromDate && !Number.isNaN(fromDate.getTime())
            ? { gte: fromDate }
            : {}),
          ...(toDate && !Number.isNaN(toDate.getTime()) ? { lt: toDate } : {}),
        },
      };
    }

    // Explicit status facet overrides the status implied by time tabs.
    // With stage tabs/columns the stage decides status; time filters only narrow dueAt.
    const impliedOpen = facets?.status
      ? { status: facets.status }
      : stageScope
        ? {}
        : { status: 'open' as const };
    const impliedDone = facets?.status ? { status: facets.status } : { status: 'done' as const };

    switch (filter) {
      case 'today':
        return { ...base, ...impliedOpen, dueAt: { gte: start, lt: end } };
      case 'overdue':
        // عقب‌افتاده ذاتاً یعنی باز و موعدگذشته
        return {
          ...base,
          ...(facets?.status ? { status: facets.status } : { status: 'open' as const }),
          dueAt: { lt: start },
        };
      case 'upcoming':
        return {
          ...base,
          ...impliedOpen,
          OR: [{ dueAt: { gte: end } }, { dueAt: null }],
        };
      case 'done':
        return { ...base, ...impliedDone };
      case 'all':
      default:
        return base;
    }
  }

  private async fireDone(
    organizationId: string,
    row: {
      id: string;
      title: string;
      person: { id: string } | null;
      company: { id: string } | null;
      deal: { id: string } | null;
      assignee: { id: string } | null;
      type: string;
      priority: string;
      dueAt: Date | null;
      typeDef?: { name: string } | null;
    },
  ) {
    this.game.emit({
      organizationId,
      userId: row.assignee?.id,
      event: 'TASK_COMPLETED',
      entityType: 'activity',
      entityId: row.id,
      entityTitle: row.title,
      facts: {
        activityType: row.type,
        typeName: row.typeDef?.name ?? null,
        priority: row.priority,
        onTime: !row.dueAt || tehranDayKey() <= tehranDayKey(row.dueAt),
      },
    });
    const ctx = {
      organizationId,
      entityType: 'activity' as const,
      entityId: row.id,
      title: row.title,
      personId: row.person?.id ?? null,
      companyId: row.company?.id ?? null,
      dealId: row.deal?.id ?? null,
      assigneeId: row.assignee?.id ?? null,
      ownerId: row.assignee?.id ?? null,
    };
    await this.automations.runTrigger('activity_done', ctx);
    await this.messageAutomations.onEvent('activity_done', ctx);
  }

  private async ensureExists(
    organizationId: string,
    id: string,
    actor: ActivityActor,
  ) {
    const found = await this.prisma.activity.findFirst({
      where: { id, organizationId, ...activityAccessWhere(actor) },
      select: { id: true },
    });
    if (!found) throw new NotFoundException('فعالیت پیدا نشد');
  }

  private async assertUserInOrg(organizationId: string, userId: string) {
    const user = await this.prisma.user.findFirst({
      where: { id: userId, memberships: { some: { organizationId } } },
      select: { id: true },
    });
    if (!user) throw new BadRequestException('مسئول انتخاب‌شده معتبر نیست');
  }

  private async assertLinks(
    organizationId: string,
    actor: ActivityActor,
    dto: {
      personId?: string | null;
      companyId?: string | null;
      dealId?: string | null;
    },
  ) {
    const personId = emptyToNull(dto.personId ?? null);
    const companyId = emptyToNull(dto.companyId ?? null);
    const dealId = emptyToNull(dto.dealId ?? null);
    const scope = ownerWhere(actor);

    if (personId) {
      const person = await this.prisma.person.findFirst({
        where: { id: personId, organizationId, ...scope },
        select: { id: true },
      });
      if (!person) throw new BadRequestException('شخص انتخاب‌شده معتبر نیست');
    }
    if (companyId) {
      const company = await this.prisma.company.findFirst({
        where: { id: companyId, organizationId, ...scope },
        select: { id: true },
      });
      if (!company) throw new BadRequestException('شرکت انتخاب‌شده معتبر نیست');
    }
    if (dealId) {
      const deal = await this.prisma.deal.findFirst({
        where: { id: dealId, organizationId, ...dealAccessWhere(actor) },
        select: { id: true },
      });
      if (!deal) throw new BadRequestException('معامله انتخاب‌شده معتبر نیست');
    }
  }

  private async notifyParticipants(
    organizationId: string,
    row: { id: string; title: string },
    userIds: string[],
  ) {
    for (const uid of new Set(userIds)) {
      await this.notifications.create({
        organizationId,
        userId: uid,
        type: 'activity_assigned',
        title: 'شما به‌عنوان شرکت‌کننده اضافه شدید',
        body: row.title,
        link: `/activities/${row.id}`,
        entityType: 'activity',
        entityId: row.id,
      });
    }
  }

  private toDto(row: ActivityRow, ctx?: DtoContext): ActivityDto {
    const fields =
      row.fields && typeof row.fields === 'object' && !Array.isArray(row.fields)
        ? (row.fields as unknown as ActivityFieldValues)
        : {};
    return {
      stageId: this.stages.effectiveStageId(row, ctx?.stages),
      typeDef: row.typeDef
        ? this.types.toSummary(row.typeDef)
        : (ctx?.types?.[row.type] ?? null),
      fields,
      participantIds: row.participantIds ?? [],
      id: row.id,
      type: row.type,
      status: row.status,
      priority: row.priority,
      title: row.title,
      description: row.description,
      dueAt: row.dueAt?.toISOString() ?? null,
      durationMinutes: row.durationMinutes,
      reminderAt: row.reminderAt?.toISOString() ?? null,
      reminderNotifyApp: row.reminderNotifyApp,
      reminderNotifySms: row.reminderNotifySms,
      reminderSentAt: row.reminderSentAt?.toISOString() ?? null,
      completedAt: row.completedAt?.toISOString() ?? null,
      importSource: row.importSource ?? 'manual',
      promotedFromPriorAt: row.promotedFromPriorAt?.toISOString() ?? null,
      tags: row.tags ?? [],
      person: row.person
        ? {
            id: row.person.id,
            fullName: `${row.person.firstName} ${row.person.lastName}`.trim(),
          }
        : null,
      company: row.company,
      deal: row.deal,
      lead: row.lead ?? null,
      assignee: row.assignee,
      assignees: (() => {
        const list = [...(row.assignees ?? [])];
        if (row.assignee && !list.some((a) => a.id === row.assignee!.id)) {
          list.unshift(row.assignee);
        }
        return list;
      })(),
      createdBy: row.createdBy,
      createdAt: row.createdAt.toISOString(),
      updatedAt: row.updatedAt.toISOString(),
    };
  }

  private async normalizeAssigneeIds(
    organizationId: string,
    raw?: string[] | null,
  ): Promise<string[]> {
    const ids = [
      ...new Set((raw ?? []).map((id) => id.trim()).filter(Boolean)),
    ];
    if (!ids.length) return [];
    const count = await this.prisma.user.count({
      where: { organizationId, id: { in: ids }, isActive: true },
    });
    if (count !== ids.length) {
      throw new BadRequestException('یکی از مسئولان انتخاب‌شده معتبر نیست');
    }
    return ids;
  }
}

const TYPE_SEARCH_TERMS: Record<ActivityDto['type'], string[]> = {
  call: ['تماس', 'تلفن', 'call'],
  meeting: ['جلسه', 'ملاقات', 'meeting'],
  task: ['وظیفه', 'تسک', 'task'],
  note: ['پیام', 'یادداشت', 'note'],
};

/** جستجوی «جلسه» یا «تماس» → فیلتر نوع فعالیت */
function typesMatching(term: string): ActivityDto['type'][] {
  const t = term.trim().toLowerCase();
  if (t.length < 2) return [];
  return (Object.keys(TYPE_SEARCH_TERMS) as ActivityDto['type'][]).filter((type) =>
    TYPE_SEARCH_TERMS[type].some((label) => label.includes(t) || t.includes(label)),
  );
}

function emptyToNull(value?: string | null): string | null {
  if (value == null) return null;
  const trimmed = value.trim();
  return trimmed.length ? trimmed : null;
}

function dayBounds(now = new Date()) {
  const start = new Date(now);
  start.setHours(0, 0, 0, 0);
  const end = new Date(start);
  end.setDate(end.getDate() + 1);
  return { start, end };
}