using Microsoft.Extensions.Options;

namespace DramaLing.Api.Models.Configuration;

public class GoogleCloudStorageOptions
{
    public const string SectionName = "GoogleCloudStorage";

    /// <summary>
    /// Google Cloud 專案 ID
    /// </summary>
    public string ProjectId { get; set; } = string.Empty;

    /// <summary>
    /// Storage Bucket 名稱
    /// </summary>
    public string BucketName { get; set; } = string.Empty;

    /// <summary>
    /// Service Account JSON 金鑰檔案路徑
    /// </summary>
    public string CredentialsPath { get; set; } = string.Empty;

    /// <summary>
    /// Service Account JSON 金鑰內容 (用於環境變數)
    /// </summary>
    public string CredentialsJson { get; set; } = string.Empty;

    /// <summary>
    /// 自訂域名 (用於 CDN)
    /// </summary>
    public string CustomDomain { get; set; } = string.Empty;

    /// <summary>
    /// 是否使用自訂域名
    /// </summary>
    public bool UseCustomDomain { get; set; } = false;

    /// <summary>
    /// 圖片路徑前綴
    /// </summary>
    public string PathPrefix { get; set; } = "examples";

    /// <summary>
    /// 傳統 API Key (如果使用)
    /// </summary>
    public string ApiKey { get; set; } = string.Empty;
}

public class GoogleCloudStorageOptionsValidator : IValidateOptions<GoogleCloudStorageOptions>
{
    public ValidateOptionsResult Validate(string? name, GoogleCloudStorageOptions options)
    {
        var failures = new List<string>();

        if (string.IsNullOrEmpty(options.ProjectId))
            failures.Add("GoogleCloudStorage:ProjectId is required");

        if (string.IsNullOrEmpty(options.BucketName))
            failures.Add("GoogleCloudStorage:BucketName is required");

        // 認證方式是可選的 - 可以使用 Application Default Credentials
        // 不強制要求明確的認證設定

        return failures.Count > 0
            ? ValidateOptionsResult.Fail(failures)
            : ValidateOptionsResult.Success;
    }
}