namespace AgriculturalPlatform.Api.Services;

/// <summary>身份证 OCR 识别结果（未识别成功时 Success=false 并给出原因）</summary>
public record IdCardOcrResult(
    string Name = "",
    string IdCard = "",
    string Gender = "",
    string Address = "",
    string BankName = "",
    string BankAccount = "",
    bool Success = false,
    string Message = "");

/// <summary>
/// OCR 识别服务抽象。当前默认实现为 DisabledOcrService（仅占位）；
/// 后续接入阿里云/百度 OCR 时，实现本接口并在 Program.cs 替换注册即可，调用方无需改动。
/// </summary>
public interface IOcrService
{
    /// <summary>识别身份证图片，side: front（正面）/ back（反面）</summary>
    Task<IdCardOcrResult> RecognizeAsync(Stream image, string side, string fileName = "idcard.jpg");
}

/// <summary>默认 OCR 实现：未配置凭证时给出友好提示，图片仍会正常保存为附件</summary>
public sealed class DisabledOcrService(IConfiguration cfg) : IOcrService
{
    public Task<IdCardOcrResult> RecognizeAsync(Stream image, string side, string fileName = "idcard.jpg")
    {
        var message = cfg["Ocr:DisabledMessage"]
            ?? "未配置 OCR 识别服务（待接入阿里云/百度 OCR 凭证），图片已保存为附件，识别字段请手动填写";
        return Task.FromResult(new IdCardOcrResult(Success: false, Message: message));
    }
}