import {
  userProfileTabs,
  userProfileFields,
  userProfileFieldValues,
  userProfileAuditLog,
  userFieldHistory,
  roleMembers,
  roles,
  userStatuses,
  type UserProfileTab,
  type UserProfileField,
  type UserProfileFieldValue,
  type UserProfileAuditLog,
  type InsertUserProfileTab,
  type InsertUserProfileField,
  type InsertUserProfileFieldValue,
  type InsertUserProfileAuditLog,
} from "@shared/schema";
import { db } from "../db";
import { eq, and, desc, inArray, sql } from "drizzle-orm";
import { UsersStorage } from "./users.storage";

export class UserProfileStorage extends UsersStorage {
  // ========== TABS ==========
  async getUserProfileTabs(organizationId: number): Promise<UserProfileTab[]> {
    return await db
      .select()
      .from(userProfileTabs)
      .where(eq(userProfileTabs.organizationId, organizationId))
      .orderBy(userProfileTabs.displayOrder);
  }

  async getUserProfileTabsByCreationOrder(organizationId: number): Promise<UserProfileTab[]> {
    return await db
      .select()
      .from(userProfileTabs)
      .where(eq(userProfileTabs.organizationId, organizationId))
      .orderBy(userProfileTabs.id);
  }

  async bulkSaveUserProfileTabs(
    organizationId: number,
    tabs: Array<{ id?: number; name: string; code: string; position?: number; displayOrder?: number }>
  ): Promise<UserProfileTab[]> {
    return await db.transaction(async (tx) => {
      const existingTabs = await tx
        .select()
        .from(userProfileTabs)
        .where(eq(userProfileTabs.organizationId, organizationId));

      const incomingIds = tabs.filter((t) => t.id && t.id > 0).map((t) => t.id!);
      const tabsToDelete = existingTabs.filter((e) => !incomingIds.includes(e.id));

      for (const tab of tabsToDelete) {
        await tx
          .delete(userProfileTabs)
          .where(
            and(
              eq(userProfileTabs.id, tab.id),
              eq(userProfileTabs.organizationId, organizationId)
            )
          );
      }

      const savedTabs: UserProfileTab[] = [];
      for (let i = 0; i < tabs.length; i++) {
        const tab = tabs[i];
        const tabData: InsertUserProfileTab = {
          organizationId,
          name: tab.name || "",
          code: tab.code || `tab_${i + 1}`,
          position: tab.position ?? i,
          displayOrder: tab.displayOrder ?? i,
        };

        if (tab.id && tab.id > 0) {
          const [updated] = await tx
            .update(userProfileTabs)
            .set(tabData)
            .where(
              and(
                eq(userProfileTabs.id, tab.id),
                eq(userProfileTabs.organizationId, organizationId)
              )
            )
            .returning();
          if (updated) savedTabs.push(updated);
        } else {
          const [created] = await tx
            .insert(userProfileTabs)
            .values(tabData)
            .returning();
          savedTabs.push(created);
        }
      }
      return savedTabs;
    });
  }

  // ========== FIELDS ==========
  async getUserProfileFields(organizationId: number): Promise<UserProfileField[]> {
    return await db
      .select()
      .from(userProfileFields)
      .where(eq(userProfileFields.organizationId, organizationId))
      .orderBy(userProfileFields.displayOrder);
  }

  async getUserProfileFieldsByCreationOrder(organizationId: number): Promise<UserProfileField[]> {
    return await db
      .select()
      .from(userProfileFields)
      .where(eq(userProfileFields.organizationId, organizationId))
      .orderBy(userProfileFields.id);
  }

  async getUserProfileFieldById(id: number, organizationId: number): Promise<UserProfileField | undefined> {
    const [field] = await db
      .select()
      .from(userProfileFields)
      .where(and(eq(userProfileFields.id, id), eq(userProfileFields.organizationId, organizationId)));
    return field || undefined;
  }

  async getUserProfileFieldByCode(code: string, organizationId: number): Promise<UserProfileField | undefined> {
    const [field] = await db
      .select()
      .from(userProfileFields)
      .where(and(eq(userProfileFields.code, code), eq(userProfileFields.organizationId, organizationId)));
    return field || undefined;
  }

  // Запись значения поля профиля из автоматизации (ctx.users.setFieldValue):
  // upsert значения, аудит с актором «Автоматизация», для полей history-number — запись в user_field_history.
  async setUserProfileFieldValueFromAutomation(
    userId: number,
    fieldCodeOrId: string | number,
    value: unknown,
    organizationId: number,
    taskId?: number | null
  ): Promise<UserProfileFieldValue> {
    const user = await this.getUser(userId);
    if (!user || user.organizationId !== organizationId) {
      throw new Error(`Пользователь ${userId} не найден в организации`);
    }

    const field = typeof fieldCodeOrId === 'number'
      ? await this.getUserProfileFieldById(fieldCodeOrId, organizationId)
      : await this.getUserProfileFieldByCode(String(fieldCodeOrId), organizationId);
    if (!field) {
      throw new Error(`Поле профиля "${fieldCodeOrId}" не найдено`);
    }

    // Для history-number: переданное число идёт в историю и становится значением поля (последняя оценка);
    // среднее за месяц пересчитывается отдельно — в поле, указанном в options.avgFieldCode (или в само поле)
    let storedValue = value;
    if (field.type === 'history-number') {
      storedValue = await this.recordUserFieldHistoryValue(userId, field, value, organizationId, { taskId });
    }

    const existing = await this.getUserProfileFieldValue(userId, field.id);
    const saved = existing
      ? await this.updateUserProfileFieldValue(userId, field.id, { value: storedValue as UserProfileFieldValue['value'] })
      : await this.createUserProfileFieldValue({ userId, fieldId: field.id, value: storedValue as InsertUserProfileFieldValue['value'] });

    await this.createUserProfileAuditLog({
      userId,
      organizationId,
      action: 'field.changed',
      fieldId: field.id,
      fieldName: field.name,
      oldValue: existing?.value ?? null,
      newValue: typeof storedValue === 'string' ? storedValue : storedValue != null ? JSON.stringify(storedValue) : null,
      changedBy: null,
      changedByName: 'Автоматизация',
      metadata: { source: 'automation', taskId: taskId ?? null },
    });

    return saved;
  }

  /**
   * Запись оценки в историю history-number поля: insert в user_field_history
   * и пересчёт месячной средней. Общая логика для автоматизаций и REST:
   * автоматизации вызывают с taskId и без актора (аудит от «Автоматизация»),
   * REST — с актором текущего пользователя. Возвращает распарсенное число.
   * Нечисловое значение — ошибка.
   */
  async recordUserFieldHistoryValue(
    userId: number,
    field: UserProfileField,
    value: unknown,
    organizationId: number,
    options?: {
      taskId?: number | null;
      auditActor?: { changedBy: number | null; changedByName: string };
    }
  ): Promise<number> {
    const num = typeof value === 'number' ? value : parseFloat(String(value).replace(',', '.').trim());
    if (!Number.isFinite(num)) {
      throw new Error(`Поле "${field.name}" имеет тип history-number: значение "${String(value)}" не является числом`);
    }
    await db.insert(userFieldHistory).values({
      organizationId,
      userId,
      fieldId: field.id,
      value: String(num),
      taskId: options?.taskId ?? null,
    });
    await this.recomputeUserFieldMonthlyAverage(userId, field.id, organizationId, options?.auditActor);
    return num;
  }

  /**
   * Пересчитывает среднее за текущий календарный месяц по истории history-number поля.
   * Среднее пишется в поле, указанное в options.avgFieldCode самого history-number поля
   * (например «Оценка» → «Средняя оценка»); если avgFieldCode не задан — в само history-number поле.
   * Если в месяце нет записей — целевое поле очищается (null). Возвращает новое среднее.
   * auditActor — кто инициировал пересчёт (по умолчанию «Автоматизация»).
   */
  async recomputeUserFieldMonthlyAverage(
    userId: number,
    fieldId: number,
    organizationId: number,
    auditActor?: { changedBy: number | null; changedByName: string }
  ) {
    const [field] = await db.select().from(userProfileFields).where(and(
      eq(userProfileFields.id, fieldId),
      eq(userProfileFields.organizationId, organizationId),
    ));
    if (!field) {
      throw new Error(`Поле профиля ${fieldId} не найдено`);
    }

    const [row] = await db
      .select({ avg: sql<number | null>`ROUND(AVG(${userFieldHistory.value})::numeric, 2)::float8` })
      .from(userFieldHistory)
      .where(and(
        eq(userFieldHistory.userId, userId),
        eq(userFieldHistory.fieldId, fieldId),
        eq(userFieldHistory.organizationId, organizationId),
        sql`${userFieldHistory.createdAt} >= date_trunc('month', now())`,
      ));
    const avg = row?.avg != null ? Number(row.avg) : null;

    // Целевое поле для среднего: из options.avgFieldCode, иначе — само history-number поле
    let targetFieldId = fieldId;
    const avgFieldCode = (field.options as { avgFieldCode?: string } | null)?.avgFieldCode;
    if (avgFieldCode) {
      const target = await this.getUserProfileFieldByCode(avgFieldCode, organizationId);
      if (!target) {
        throw new Error(`Поле для среднего "${avgFieldCode}" (options.avgFieldCode поля "${field.name}") не найдено`);
      }
      targetFieldId = target.id;
    }

    const existing = await this.getUserProfileFieldValue(userId, targetFieldId);
    if (existing) {
      if (existing.value !== avg) {
        await this.updateUserProfileFieldValue(userId, targetFieldId, { value: avg as UserProfileFieldValue['value'] });
        await this.createUserProfileAuditLog({
          userId,
          organizationId,
          action: 'field.changed',
          fieldId: targetFieldId,
          oldValue: existing.value ?? null,
          newValue: avg != null ? String(avg) : null,
          changedBy: auditActor?.changedBy ?? null,
          changedByName: auditActor?.changedByName ?? 'Автоматизация',
          metadata: { source: auditActor ? 'web' : 'automation', reason: 'monthly-average-recalc', historyFieldId: fieldId },
        });
      }
    } else if (avg != null) {
      await this.createUserProfileFieldValue({ userId, fieldId: targetFieldId, value: avg as InsertUserProfileFieldValue['value'] });
    }
    return avg;
  }

  /**
   * ctx.users.recalcFieldAverage: принудительный пересчёт среднего за месяц для history-number поля.
   */
  async recalcUserFieldAverageFromAutomation(userId: number, fieldCodeOrId: string | number, organizationId: number) {
    const field = typeof fieldCodeOrId === 'number'
      ? await this.getUserProfileFieldById(fieldCodeOrId, organizationId)
      : await this.getUserProfileFieldByCode(String(fieldCodeOrId), organizationId);
    if (!field) {
      throw new Error(`Поле профиля "${fieldCodeOrId}" не найдено`);
    }
    if (field.type !== 'history-number') {
      throw new Error(`Пересчёт среднего доступен только для полей типа history-number, у поля "${field.name}" тип ${field.type}`);
    }
    const user = await this.getUser(userId);
    if (!user || user.organizationId !== organizationId) {
      throw new Error(`Пользователь ${userId} не найден в организации`);
    }
    return this.recomputeUserFieldMonthlyAverage(userId, field.id, organizationId);
  }

  async bulkSaveUserProfileFields(
    organizationId: number,
    fieldIdsToDelete: number[],
    fields: Array<{
      id?: number;
      name: string;
      code: string;
      type: string;
      isRequired?: boolean;
      placeholder?: string | null;
      defaultValue?: string | null;
      validationRules?: unknown;
      options?: unknown;
      position?: number | null;
      displayOrder?: number | null;
      tabId?: number | null;
      linkedFormId?: number | null;
      companyAutofill?: unknown;
      maxFileCount?: number | null;
      maxFileSizeMB?: number | null;
      autoProlongation?: boolean | null;
      autoProlongationLabel?: string | null;
    }>
  ): Promise<UserProfileField[]> {
    return await db.transaction(async (tx) => {
      for (const fieldId of fieldIdsToDelete) {
        await tx
          .delete(userProfileFields)
          .where(
            and(
              eq(userProfileFields.id, fieldId),
              eq(userProfileFields.organizationId, organizationId)
            )
          );
      }

      const resultFields: UserProfileField[] = [];
      for (let i = 0; i < fields.length; i++) {
        const field = fields[i];
        const fieldData: InsertUserProfileField = {
          organizationId,
          name: field.name,
          code: field.code,
          type: field.type,
          isRequired: field.isRequired || false,
          placeholder: field.placeholder || null,
          defaultValue: field.defaultValue || null,
          validationRules: field.validationRules || null,
          options: field.options || null,
          position: field.position ?? i,
          displayOrder: field.displayOrder ?? i,
          tabId: field.tabId || null,
          linkedFormId: field.linkedFormId || null,
          companyAutofill: field.companyAutofill || null,
          maxFileCount:
            field.maxFileCount != null && field.maxFileCount > 0 ? field.maxFileCount : null,
          maxFileSizeMB:
            field.maxFileSizeMB != null && field.maxFileSizeMB > 0 ? field.maxFileSizeMB : null,
          autoProlongation: field.autoProlongation || false,
          autoProlongationLabel: field.autoProlongationLabel || null,
        };

        if (field.id && field.id > 0) {
          const [updated] = await tx
            .update(userProfileFields)
            .set(fieldData)
            .where(
              and(
                eq(userProfileFields.id, field.id),
                eq(userProfileFields.organizationId, organizationId)
              )
            )
            .returning();
          if (updated) resultFields.push(updated);
        } else {
          const [created] = await tx
            .insert(userProfileFields)
            .values(fieldData)
            .returning();
          resultFields.push(created);
        }
      }
      return resultFields;
    });
  }

  // ========== FIELD VALUES ==========
  async getUserProfileFieldValues(userId: number): Promise<UserProfileFieldValue[]> {
    return await db
      .select()
      .from(userProfileFieldValues)
      .where(eq(userProfileFieldValues.userId, userId));
  }

  async getUserProfileFieldValue(userId: number, fieldId: number): Promise<UserProfileFieldValue | undefined> {
    const [value] = await db
      .select()
      .from(userProfileFieldValues)
      .where(
        and(
          eq(userProfileFieldValues.userId, userId),
          eq(userProfileFieldValues.fieldId, fieldId)
        )
      );
    return value || undefined;
  }

  async createUserProfileFieldValue(insertValue: InsertUserProfileFieldValue): Promise<UserProfileFieldValue> {
    const [value] = await db
      .insert(userProfileFieldValues)
      .values({ ...insertValue, createdAt: new Date(), updatedAt: new Date() })
      .returning();
    return value;
  }

  async createUserProfileFieldValueWithAudit(
    insertValue: InsertUserProfileFieldValue,
    organizationId: number,
    changedBy: number
  ): Promise<UserProfileFieldValue> {
    const value = await this.createUserProfileFieldValue(insertValue);
    await this.createUserProfileAuditLog({
      userId: insertValue.userId,
      organizationId,
      action: 'field_value.created',
      fieldId: insertValue.fieldId,
      oldValue: null,
      newValue: typeof insertValue.value === 'string' ? insertValue.value : JSON.stringify(insertValue.value),
      changedBy,
    });
    return value;
  }

  async updateUserProfileFieldValue(
    userId: number,
    fieldId: number,
    updates: Partial<UserProfileFieldValue>
  ): Promise<UserProfileFieldValue> {
    const [value] = await db
      .update(userProfileFieldValues)
      .set({ ...updates, updatedAt: new Date() })
      .where(
        and(
          eq(userProfileFieldValues.userId, userId),
          eq(userProfileFieldValues.fieldId, fieldId)
        )
      )
      .returning();
    return value;
  }

  async updateUserProfileFieldValueWithAudit(
    userId: number,
    fieldId: number,
    updates: Partial<UserProfileFieldValue>,
    organizationId: number,
    changedBy: number
  ): Promise<UserProfileFieldValue> {
    const existing = await this.getUserProfileFieldValue(userId, fieldId);
    const value = await this.updateUserProfileFieldValue(userId, fieldId, updates);
    await this.createUserProfileAuditLog({
      userId,
      organizationId,
      action: 'field_value.updated',
      fieldId,
      oldValue: existing?.value ?? null,
      newValue: typeof updates.value === 'string' ? updates.value : updates.value != null ? JSON.stringify(updates.value) : null,
      changedBy,
    });
    return value;
  }

  async deleteUserProfileFieldValue(userId: number, fieldId: number): Promise<void> {
    await db
      .delete(userProfileFieldValues)
      .where(
        and(
          eq(userProfileFieldValues.userId, userId),
          eq(userProfileFieldValues.fieldId, fieldId)
        )
      );
  }

  async deleteUserProfileFieldValueWithAudit(
    userId: number,
    fieldId: number,
    organizationId: number,
    changedBy: number
  ): Promise<void> {
    const existing = await this.getUserProfileFieldValue(userId, fieldId);
    await this.deleteUserProfileFieldValue(userId, fieldId);
    if (existing) {
      await this.createUserProfileAuditLog({
        userId,
        organizationId,
        action: 'field_value.deleted',
        fieldId,
        oldValue: existing.value ?? null,
        newValue: null,
        changedBy,
      });
    }
  }

  // ========== AUDIT LOG ==========
  async getUserProfileAuditLog(userId: number, organizationId: number): Promise<UserProfileAuditLog[]> {
    return await db
      .select()
      .from(userProfileAuditLog)
      .where(
        and(
          eq(userProfileAuditLog.userId, userId),
          eq(userProfileAuditLog.organizationId, organizationId)
        )
      )
      .orderBy(desc(userProfileAuditLog.createdAt));
  }

  async createUserProfileAuditLog(insertValue: InsertUserProfileAuditLog): Promise<UserProfileAuditLog> {
    const [entry] = await db
      .insert(userProfileAuditLog)
      .values({ ...insertValue, createdAt: new Date() })
      .returning();
    return entry;
  }

  // ========== FIELD HISTORY ==========
  // Агрегация истории числового поля (history-number) по временным бакетам
  // для графика в профиле пользователя. Пустые бакеты не возвращаются.
  async getUserFieldHistoryPoints(
    userId: number,
    fieldId: number,
    organizationId: number,
    days: number,
    bucket: 'day' | 'week' | 'month'
  ): Promise<{
    points: { date: string; avg: number; count: number }[];
    overallAvg: number | null;
    totalCount: number;
  }> {
    const pointsResult = await db.execute(sql`
      SELECT to_char(date_trunc(${bucket}, created_at), 'YYYY-MM-DD') AS date,
             AVG(value)::float8 AS avg,
             COUNT(*)::int AS count
      FROM user_field_history
      WHERE user_id = ${userId}
        AND field_id = ${fieldId}
        AND organization_id = ${organizationId}
        AND created_at >= now() - make_interval(days => ${days})
      GROUP BY 1
      ORDER BY 1
    `);
    const totalsResult = await db.execute(sql`
      SELECT AVG(value)::float8 AS overall_avg, COUNT(*)::int AS total_count
      FROM user_field_history
      WHERE user_id = ${userId}
        AND field_id = ${fieldId}
        AND organization_id = ${organizationId}
        AND created_at >= now() - make_interval(days => ${days})
    `);
    const points = pointsResult.rows as Array<{ date: string; avg: number; count: number }>;
    const totals = (totalsResult.rows as Array<{ overall_avg: number | null; total_count: number }>)[0];
    return {
      points,
      overallAvg: totals?.overall_avg ?? null,
      totalCount: totals?.total_count ?? 0,
    };
  }

  // ========== DETAIL ==========
  async getUserProfileDetail(
    userId: number,
    organizationId: number
  ): Promise<{
    user: any;
    tabs: UserProfileTab[];
    fields: UserProfileField[];
    fieldValues: UserProfileFieldValue[];
    organizationalRoles: { id: number; name: string }[];
  }> {
    const user = await this.getUser(userId);
    const tabs = await this.getUserProfileTabs(organizationId);
    const fields = await this.getUserProfileFields(organizationId);
    const fieldValues = user ? await this.getUserProfileFieldValues(userId) : [];
    const userRoles = user
      ? await db
          .select({ roleId: roleMembers.roleId, roleName: roles.name })
          .from(roleMembers)
          .innerJoin(roles, eq(roleMembers.roleId, roles.id))
          .where(and(eq(roleMembers.userId, userId), eq(roles.organizationId, organizationId)))
      : [];
    const organizationalRoles = userRoles.map((r) => ({ id: r.roleId, name: r.roleName }));

    let status = null;
    if (user?.statusId) {
      const [s] = await db.select().from(userStatuses).where(eq(userStatuses.id, user.statusId));
      status = s || null;
    }

    return { user: { ...user, status }, tabs, fields, fieldValues, organizationalRoles };
  }
}