export class LogService {
  constructor(limit = 400, logger = console) {
    this.limit = limit;
    this.logger = logger;
    this.entries = [];
  }

  createEntry(type, message, meta = {}) {
    return {
      id: `${Date.now()}_${Math.random().toString(36).slice(2, 8)}`,
      type,
      message,
      meta,
      ts: new Date().toISOString()
    };
  }

  push(type, message, meta = {}) {
    const entry = this.createEntry(type, message, meta);
    this.entries.push(entry);

    if (this.entries.length > this.limit) {
      this.entries.splice(0, this.entries.length - this.limit);
    }

    if (this.logger && type !== "output") {
      this.logger.info(`[${entry.type}] ${entry.message}`);
    }

    return entry;
  }

  snapshot() {
    return [...this.entries];
  }

  clear() {
    this.entries = [];
  }
}