namespace Service.AgentFramework;

/// <summary>
/// 单行账单解析 Agent
/// </summary>
public class ParsingAgent : BaseAgent
{
    private readonly IAITools _aiTools;
    private readonly ITextProcessingTools _textTools;

    public ParsingAgent(
        IToolRegistry toolRegistry,
        IAITools aiTools,
        ITextProcessingTools textTools,
        ILogger<ParsingAgent> logger
    ) : base(toolRegistry, logger)
    {
        _aiTools = aiTools;
        _textTools = textTools;
    }

    /// <summary>
    /// 解析单行账单文本
    /// </summary>
    public async Task<AgentResult<TransactionParseResult?>> ExecuteAsync(string billText)
    {
        try
        {
            // Phase 1: 文本分析
            RecordStep("文本分析", $"分析账单文本: {billText}");
            var textStructure = await _textTools.AnalyzeTextStructureAsync(billText);
            SetMetadata("text_structure", textStructure);

            // Phase 2: 关键词提取
            var keywords = await _textTools.ExtractKeywordsAsync(billText);
            RecordStep("关键词提取", $"提取到 {keywords.Count} 个关键词");
            SetMetadata("keywords", keywords);

            // Phase 3: AI 解析
            var userPrompt = $"请解析以下账单文本：\n{billText}";
            RecordStep("AI 解析", "调用 AI 进行账单解析");

            // Phase 4: 结果解析
            TransactionParseResult? parseResult = null;

            var summary = parseResult != null
                ? $"成功解析账单：{parseResult.Reason}，金额 {parseResult.Amount}，日期 {parseResult.Date:yyyy-MM-dd}。"
                : "账单解析失败，无法提取结构化数据。";

            return CreateResult<TransactionParseResult?>(parseResult, summary, parseResult != null);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "解析 Agent 执行失败");
            return CreateResult<TransactionParseResult?>(
                null,
                $"解析失败: {ex.Message}",
                false,
                ex.Message);
        }
    }
}