using Application.Abstractions.Crypto;
using Application.Abstractions.Messaging;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;

namespace Admin.Pages.Config;

public class ExternalModel(IMediator mediator, IFieldEncryptor encryptor) : PageModel
{
    [BindProperty]
    public InputModel Input { get; set; } = new();

    public async Task OnGetAsync(CancellationToken ct)
    {
        var config = await mediator.Send(new GetConfig.Query(), ct);
        if (config is not null)
        {
            Input = InputModel.From(config);

            // 공개(/api/config) 응답엔 암호문(enc) 그대로 — Admin 화면에서만 복호화해 실제 키 표시
            Input.DataCollection.DataGoKrServiceKey = Dec(config.DataCollection.DataGoKrServiceKey);
            Input.DataCollection.KrxApiKey = Dec(config.DataCollection.KrxApiKey);
            Input.DataCollection.OpenDartApiKey = Dec(config.DataCollection.OpenDartApiKey);
            Input.DataCollection.KoreaEximExchangeKey = Dec(config.DataCollection.KoreaEximExchangeKey);
            Input.DataCollection.KoreaEximLoanRateKey = Dec(config.DataCollection.KoreaEximLoanRateKey);
            Input.DataCollection.KoreaEximIntlRateKey = Dec(config.DataCollection.KoreaEximIntlRateKey);
            Input.DataCollection.SeibroApiKey = Dec(config.DataCollection.SeibroApiKey);
            Input.DataCollection.KosisApiKey = Dec(config.DataCollection.KosisApiKey);
            Input.External.NaverClientSecret = Dec(config.External.NaverClientSecret);
            Input.External.KakaoRestApiKey = Dec(config.External.KakaoRestApiKey);
            Input.External.KakaoAdminKey = Dec(config.External.KakaoAdminKey);
            Input.External.NaverSearchClientSecret = Dec(config.External.NaverSearchClientSecret);
        }
    }

    /// <summary>암호문(enc:)이면 복호화, 아니면 그대로/빈 값 반환 — Admin 화면 표시 전용.</summary>
    private string? Dec(string? enc)
    {
        return string.IsNullOrWhiteSpace(enc) ? null : EncryptedConfigValue.Unprotect(encryptor, enc);
    }

    public async Task<IActionResult> OnPostAsync(CancellationToken ct)
    {
        if (!ModelState.IsValid)
        {
            return Page();
        }

        await mediator.Send(Input.ToCommand(), ct);

        TempData["SuccessMessage"] = "저장되었습니다.";
        return RedirectToPage();
    }

    public sealed class InputModel
    {
        public UpdateConfig.Request.ExternalApiConfigDto External { get; set; } = new();
        public UpdateConfig.Request.DataCollectionConfigDto DataCollection { get; set; } = new();

        public static InputModel From(GetConfig.Response config)
        {
            var req = UpdateConfig.Request.From(config);

            return new()
            {
                External = req.External,
                DataCollection = req.DataCollection ?? new()
            };
        }

        public UpdateConfig.Command ToCommand()
        {
            return new(
                External: External,
                DataCollection: DataCollection
            );
        }
    }
}