import { Logger } from '@nestjs/common';

export interface RequestLogContext {
  requestId: string;
  trackingCode?: string;
  provider?: string;
  inquiryType?: string;
  durationMs?: number;
  success?: boolean;
}

/**
 * Structured console logging for inquiry lifecycle events.
 * Complements MongoDB persistence in LoggingModule.
 */
export class RequestLogger {
  private readonly logger: Logger;

  constructor(context: string) {
    this.logger = new Logger(context);
  }

  logStart(ctx: RequestLogContext, message: string): void {
    this.logger.log(this.format(ctx, message));
  }

  logSuccess(ctx: RequestLogContext, message: string): void {
    this.logger.log(this.format({ ...ctx, success: true }, message));
  }

  logFailure(ctx: RequestLogContext, message: string, error?: unknown): void {
    this.logger.error(
      this.format({ ...ctx, success: false }, message),
      error instanceof Error ? error.stack : undefined,
    );
  }

  private format(ctx: RequestLogContext, message: string): string {
    const parts = [
      `requestId=${ctx.requestId}`,
      ctx.trackingCode ? `trackingCode=${ctx.trackingCode}` : null,
      ctx.provider ? `provider=${ctx.provider}` : null,
      ctx.inquiryType ? `inquiryType=${ctx.inquiryType}` : null,
      ctx.durationMs !== undefined ? `durationMs=${ctx.durationMs}` : null,
      ctx.success !== undefined ? `success=${ctx.success}` : null,
      `msg=${message}`,
    ].filter(Boolean);

    return parts.join(' | ');
  }
}