using System.Net;
using System.Net.Http.Headers;
using System.Net.Http.Json;
using System.Text.Json;
using Dapper;
using Microsoft.Data.SqlClient;
using SIGCM2.TestSupport;

namespace SIGCM2.Api.Tests.Usuarios;

/// <summary>
/// Integration tests for POST /api/v1/users/{id}/password/reset (UDT-008 B7).
/// </summary>
[Collection("ApiIntegration")]
public sealed class ResetPasswordEndpointTests : IAsyncLifetime
{
    private const string TestConnectionString = TestConnectionStrings.ApiTestDb;

    private readonly HttpClient _client;
    private readonly SqlTestFixture _db;

    public ResetPasswordEndpointTests(TestWebAppFactory factory)
    {
        _client = factory.CreateClient();
        _db = new SqlTestFixture(TestConnectionString);
    }

    public async Task InitializeAsync() => await _db.InitializeAsync();
    public async Task DisposeAsync() => await _db.DisposeAsync();

    private async Task<string> GetAdminTokenAsync()
    {
        var response = await _client.PostAsJsonAsync("/api/v1/auth/login",
            new { username = "admin", password = "@Diego550@" });
        response.EnsureSuccessStatusCode();
        var json = await response.Content.ReadFromJsonAsync<JsonElement>();
        return json.GetProperty("accessToken").GetString()!;
    }

    private async Task<int> GetAdminIdAsync()
    {
        await using var conn = new SqlConnection(TestConnectionString);
        await conn.OpenAsync();
        return await conn.ExecuteScalarAsync<int>("SELECT Id FROM dbo.Usuario WHERE Username = 'admin'");
    }

    private async Task<int> SeedCajeroAsync(string username)
    {
        await using var conn = new SqlConnection(TestConnectionString);
        await conn.OpenAsync();
        return await conn.ExecuteScalarAsync<int>($"""
            IF NOT EXISTS (SELECT 1 FROM dbo.Usuario WHERE Username = '{username}')
            INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson, Activo, MustChangePassword)
            VALUES ('{username}', '$2a$12$rmq6tlSAQ8WXhR2CwLCSeuwCJKz/.8Eab95UQCUNfwe4dokeOqMcW', 'Test', 'User', 'cajero', '[]', 1, 0);
            SELECT Id FROM dbo.Usuario WHERE Username = '{username}'
            """);
    }

    private async Task<string> GetCajeroTokenAsync()
    {
        await SeedCajeroAsync("cajero_reset_auth");
        var response = await _client.PostAsJsonAsync("/api/v1/auth/login",
            new { username = "cajero_reset_auth", password = "@Diego550@" });
        response.EnsureSuccessStatusCode();
        var json = await response.Content.ReadFromJsonAsync<JsonElement>();
        return json.GetProperty("accessToken").GetString()!;
    }

    [Fact]
    public async Task POST_Password_Reset_200_Returns_TempPassword()
    {
        var adminToken = await GetAdminTokenAsync();
        var targetId = await SeedCajeroAsync("cajero_reset_happy");

        var request = new HttpRequestMessage(HttpMethod.Post, $"/api/v1/users/{targetId}/password/reset");
        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", adminToken);

        var response = await _client.SendAsync(request);

        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        var json = await response.Content.ReadFromJsonAsync<JsonElement>();
        Assert.True(json.TryGetProperty("tempPassword", out var tempProp));
        Assert.False(string.IsNullOrWhiteSpace(tempProp.GetString()));
    }

    [Fact]
    public async Task POST_Password_Reset_TempPassword_Length_Gte_12()
    {
        var adminToken = await GetAdminTokenAsync();
        var targetId = await SeedCajeroAsync("cajero_reset_length");

        var request = new HttpRequestMessage(HttpMethod.Post, $"/api/v1/users/{targetId}/password/reset");
        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", adminToken);

        var response = await _client.SendAsync(request);

        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        var json = await response.Content.ReadFromJsonAsync<JsonElement>();
        var tempPassword = json.GetProperty("tempPassword").GetString()!;
        Assert.True(tempPassword.Length >= 12, $"TempPassword too short: {tempPassword.Length}");
    }

    [Fact]
    public async Task POST_Password_Reset_400_Cannot_Self_Reset()
    {
        var adminToken = await GetAdminTokenAsync();
        var adminId = await GetAdminIdAsync();

        var request = new HttpRequestMessage(HttpMethod.Post, $"/api/v1/users/{adminId}/password/reset");
        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", adminToken);

        var response = await _client.SendAsync(request);

        Assert.Equal(HttpStatusCode.BadRequest, response.StatusCode);
        var body = await response.Content.ReadAsStringAsync();
        Assert.Contains("cannot-self-reset", body, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public async Task POST_Password_Reset_404_Target_Not_Found()
    {
        var adminToken = await GetAdminTokenAsync();

        var request = new HttpRequestMessage(HttpMethod.Post, "/api/v1/users/9999/password/reset");
        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", adminToken);

        var response = await _client.SendAsync(request);

        Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
    }

    [Fact]
    public async Task POST_Password_Reset_401_No_Auth()
    {
        var response = await _client.SendAsync(new HttpRequestMessage(HttpMethod.Post, "/api/v1/users/1/password/reset"));
        Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
    }

    [Fact]
    public async Task POST_Password_Reset_403_No_Permission()
    {
        var cajeroToken = await GetCajeroTokenAsync();
        var targetId = await SeedCajeroAsync("cajero_reset_403_target");

        var request = new HttpRequestMessage(HttpMethod.Post, $"/api/v1/users/{targetId}/password/reset");
        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", cajeroToken);

        var response = await _client.SendAsync(request);

        Assert.Equal(HttpStatusCode.Forbidden, response.StatusCode);
    }
}
