import { createLogger, type ILogger, StorageError } from '@robota-sdk/agent-core';

import { aggregateUsageStats } from '../aggregate-usage-stats';

import type { IUsageStorage, IUsageStats, IAggregatedUsageStats } from '../types';

/**
 * File storage implementation for usage statistics
 */
export class FileUsageStorage implements IUsageStorage {
  private filePath: string;
  private logger: ILogger;

  constructor(filePath: string) {
    this.filePath = filePath;
    this.logger = createLogger('FileUsageStorage');
  }

  async save(entry: IUsageStats): Promise<void> {
    try {
      // File operations would be implemented here
      // This is a placeholder for actual file system operations
      this.logger.warn('File usage storage not fully implemented yet', {
        filePath: this.filePath,
        entry: {
          timestamp: entry.timestamp.toISOString(),
          provider: entry.provider,
          model: entry.model,
          tokens: entry.tokensUsed.total,
          cost: entry.cost?.total,
          success: entry.success,
        },
      });
    } catch (error) {
      throw new StorageError('Failed to save usage stats to file', {
        filePath: this.filePath,
        error: error instanceof Error ? error.message : String(error),
      });
    }
  }

  async getStats(
    conversationId?: string,
    timeRange?: { start: Date; end: Date },
  ): Promise<IUsageStats[]> {
    try {
      // File operations would be implemented here
      this.logger.warn('File usage storage not fully implemented yet', {
        filePath: this.filePath,
        conversationId,
        timeRange,
      });
      return [];
    } catch (error) {
      throw new StorageError('Failed to load usage stats from file', {
        filePath: this.filePath,
        conversationId: conversationId || 'all',
        error: error instanceof Error ? error.message : String(error),
      });
    }
  }

  async getAggregatedStats(timeRange?: { start: Date; end: Date }): Promise<IAggregatedUsageStats> {
    try {
      const stats = await this.getStats(undefined, timeRange);
      return aggregateUsageStats(stats, timeRange);
    } catch (error) {
      throw new StorageError('Failed to get aggregated usage stats from file', {
        filePath: this.filePath,
        error: error instanceof Error ? error.message : String(error),
      });
    }
  }

  async clear(): Promise<void> {
    try {
      // File operations would be implemented here
      this.logger.warn('File usage storage not fully implemented yet', {
        filePath: this.filePath,
        operation: 'clear',
      });
    } catch (error) {
      throw new StorageError('Failed to clear usage stats from file', {
        filePath: this.filePath,
        error: error instanceof Error ? error.message : String(error),
      });
    }
  }

  async flush(): Promise<void> {
    try {
      // File flushing would be implemented here
      this.logger.warn('File usage storage flush not fully implemented yet', {
        filePath: this.filePath,
      });
    } catch (error) {
      throw new StorageError('Failed to flush usage stats to file', {
        filePath: this.filePath,
        error: error instanceof Error ? error.message : String(error),
      });
    }
  }

  async close(): Promise<void> {
    try {
      // File closing would be implemented here
      this.logger.warn('File usage storage close not fully implemented yet', {
        filePath: this.filePath,
      });
    } catch (error) {
      throw new StorageError('Failed to close usage stats file', {
        filePath: this.filePath,
        error: error instanceof Error ? error.message : String(error),
      });
    }
  }
}
