using System.Text.Json;
using System.Text.Json.Serialization;
using ZA.CoreService.ESBCertificateManager.Models;

namespace ZA.CoreService.ESBCertificateManager.Data;

public sealed class JsonTargetRepository : ITargetRepository
{
    private static readonly JsonSerializerOptions JsonOptions = new()
    {
        PropertyNameCaseInsensitive = true,
        Converters = { new JsonStringEnumConverter() }
    };

    private readonly string _filePath;

    public JsonTargetRepository(string filePath)
    {
        _filePath = filePath;
    }

    public string SourceDescription => $"Offline-Sample ({Path.GetFileName(_filePath)})";

    public async Task<IReadOnlyList<DeploymentTarget>> GetActiveTargetsAsync(
        CancellationToken cancellationToken = default)
    {
        if (!File.Exists(_filePath))
        {
            throw new FileNotFoundException(
                $"Sample-Zieldatei wurde nicht gefunden: {_filePath}",
                _filePath);
        }

        await using FileStream stream = File.OpenRead(_filePath);
        List<DeploymentTarget>? targets = await JsonSerializer.DeserializeAsync<List<DeploymentTarget>>(
            stream,
            JsonOptions,
            cancellationToken);

        return (targets ?? [])
            .Where(t => t.IsActive)
            .OrderBy(t => t.SortOrder)
            .ThenBy(t => t.Name)
            .ToList();
    }
}