using System.Text.Json;
using Microsoft.JSInterop;

namespace EnvelopeGenerator.Server.Client.Services;

public sealed class CreateEnvelopeBootstrapStorageService(IJSRuntime jsRuntime)
{
    private const string StorageKeyPrefix = "sender.createEnvelope.bootstrap.";
    private static readonly JsonSerializerOptions JsonOptions = new(JsonSerializerDefaults.Web);

    public async Task<string> StoreAsync(CreateEnvelopeBootstrapPayload payload)
    {
        var token = Guid.NewGuid().ToString("N");
        var key = BuildStorageKey(token);
        var json = JsonSerializer.Serialize(payload, JsonOptions);
        await jsRuntime.InvokeVoidAsync("sessionStorage.setItem", key, json);
        return token;
    }

    public async Task<CreateEnvelopeBootstrapPayload?> ConsumeAsync(string? token)
    {
        if (string.IsNullOrWhiteSpace(token))
            return null;

        var key = BuildStorageKey(token);
        var raw = await jsRuntime.InvokeAsync<string?>("sessionStorage.getItem", key);
        await jsRuntime.InvokeVoidAsync("sessionStorage.removeItem", key);

        if (string.IsNullOrWhiteSpace(raw))
            return null;

        try
        {
            return JsonSerializer.Deserialize<CreateEnvelopeBootstrapPayload>(raw, JsonOptions);
        }
        catch
        {
            return null;
        }
    }

    private static string BuildStorageKey(string token) => $"{StorageKeyPrefix}{token}";
}

public sealed record CreateEnvelopeBootstrapPayload(
    string Title,
    string Message,
    int? EnvelopeTypeId,
    string Language,
    IReadOnlyList<CreateEnvelopeBootstrapReceiver> Receivers,
    byte[]? DocumentBytes,
    string? DocumentFileName);

public sealed record CreateEnvelopeBootstrapReceiver(string FullName, string EmailAddress);