import { Injectable } from "@nestjs/common";
import { CreateOrderBody, UserMapping } from "../dto/order.dto";
import { getSalesforceFieldMap } from "../../common/config/field-map";

/**
 * Handles building order header data from selections
 */
@Injectable()
export class OrderBuilder {
  /**
   * Build order fields for Salesforce Order creation
   */
  buildOrderFields(
    body: CreateOrderBody,
    userMapping: UserMapping,
    pricebookId: string
  ): Record<string, unknown> {
    const today = new Date().toISOString().slice(0, 10); // YYYY-MM-DD
    const fields = getSalesforceFieldMap();

    const orderFields: Record<string, unknown> = {
      AccountId: userMapping.sfAccountId,
      EffectiveDate: today,
      Status: "Pending Review",
      Pricebook2Id: pricebookId,
      [fields.order.orderType]: body.orderType,
      ...(body.opportunityId ? { OpportunityId: body.opportunityId } : {}),
    };

    // Add activation fields
    this.addActivationFields(orderFields, body);

    // Add service-specific fields (only user configuration choices)
    switch (body.orderType) {
      case "Internet":
        this.addInternetFields(orderFields, body);
        break;
      case "SIM":
        this.addSimFields(orderFields, body);
        break;
      case "VPN":
        this.addVpnFields(orderFields, body);
        break;
    }

    // Add address snapshot from WHMCS (authoritative source)
    // Note: We'll need to pass userId separately or get it from the userMapping
    // For now, skip address snapshot until we have proper user ID access

    return orderFields;
  }

  private addActivationFields(orderFields: Record<string, unknown>, body: CreateOrderBody): void {
    const fields = getSalesforceFieldMap();
    const config = body.configurations || {};

    if (config.activationType) {
      orderFields[fields.order.activationType] = config.activationType;
    }
    if (config.scheduledAt) {
      orderFields[fields.order.activationScheduledAt] = config.scheduledAt;
    }
    orderFields[fields.order.activationStatus] = "Not Started";
  }

  private addInternetFields(orderFields: Record<string, unknown>, body: CreateOrderBody): void {
    const fields = getSalesforceFieldMap();
    const config = body.configurations || {};

    // Only store user configuration choices that cannot be derived from OrderItems
    if (config.accessMode) {
      orderFields[fields.order.accessMode] = config.accessMode;
    }

    // Note: Removed fields that can be derived from OrderItems:
    // - internetPlanTier: derive from service product metadata
    // - installationType: derive from install product name
    // - weekendInstall: derive from SKU analysis
    // - hikariDenwa: derive from SKU analysis
  }

  private addSimFields(orderFields: Record<string, unknown>, body: CreateOrderBody): void {
    const fields = getSalesforceFieldMap();
    const config = body.configurations || {};

    // Only store user configuration choices that cannot be derived from OrderItems
    if (config.simType) {
      orderFields[fields.order.simType] = config.simType;
    }
    if (config.eid) {
      orderFields[fields.order.eid] = config.eid;
    }

    // Note: Removed fields that can be derived from OrderItems:
    // - simVoiceMail: derive from SKU analysis
    // - simCallWaiting: derive from SKU analysis

    // MNP fields
    if (config.isMnp === "true") {
      orderFields[fields.order.mnp.application] = true;
      if (config.mnpNumber) {
        orderFields[fields.order.mnp.reservationNumber] = config.mnpNumber;
      }
      if (config.mnpExpiry) {
        orderFields[fields.order.mnp.expiryDate] = config.mnpExpiry;
      }
      if (config.mnpPhone) {
        orderFields[fields.order.mnp.phoneNumber] = config.mnpPhone;
      }
      if (config.mvnoAccountNumber) {
        orderFields[fields.order.mnp.mvnoAccountNumber] = config.mvnoAccountNumber;
      }
      if (config.portingLastName) {
        orderFields[fields.order.mnp.portingLastName] = config.portingLastName;
      }
      if (config.portingFirstName) {
        orderFields[fields.order.mnp.portingFirstName] = config.portingFirstName;
      }
      if (config.portingLastNameKatakana) {
        orderFields[fields.order.mnp.portingLastNameKatakana] = config.portingLastNameKatakana;
      }
      if (config.portingFirstNameKatakana) {
        orderFields[fields.order.mnp.portingFirstNameKatakana] = config.portingFirstNameKatakana;
      }
      if (config.portingGender) {
        orderFields[fields.order.mnp.portingGender] = config.portingGender;
      }
      if (config.portingDateOfBirth) {
        orderFields[fields.order.mnp.portingDateOfBirth] = config.portingDateOfBirth;
      }
    }
  }

  private addVpnFields(orderFields: Record<string, unknown>, body: CreateOrderBody): void {
    // Note: Removed vpnRegion field - can be derived from service product metadata in OrderItems
    // VPN orders only need user configuration choices (none currently defined)
  }
}