using Omika.Diagnostics.Users;

namespace Omika.Diagnostics.Tests.Fakes;

/// <summary>
/// Fake en mémoire de <see cref="IDiagnosticUserRepository"/> pour les tests sans PostgreSQL.
/// Reproduit la sémantique du repository Npgsql : unicité insensible à la casse, tri par
/// username, hash stocké (jamais de mot de passe en clair).
/// </summary>
public sealed class FakeDiagnosticUserRepository : IDiagnosticUserRepository
{
    private readonly List<DiagnosticUserRecord> _users = [];
    private long _nextId = 1;

    public IReadOnlyList<DiagnosticUserRecord> Seed(params DiagnosticUserRecord[] users)
    {
        foreach (DiagnosticUserRecord u in users)
        {
            if (u.Id == 0)
            {
                u.Id = _nextId++;
            }
            else
            {
                _nextId = Math.Max(_nextId, u.Id + 1);
            }

            _users.Add(u);
        }

        return _users;
    }

    public Task<DiagnosticUserRecord?> GetByUsernameAsync(
        string username,
        CancellationToken cancellationToken = default)
    {
        string? normalized = username?.Trim();
        DiagnosticUserRecord? found = _users.FirstOrDefault(u =>
            string.Equals(u.Username, normalized, StringComparison.OrdinalIgnoreCase));
        return Task.FromResult(found);
    }

    public Task<IReadOnlyList<DiagnosticUserRecord>> ListAsync(
        CancellationToken cancellationToken = default)
    {
        IReadOnlyList<DiagnosticUserRecord> ordered = _users
            .OrderBy(u => u.Username, StringComparer.OrdinalIgnoreCase)
            .ToList();
        return Task.FromResult(ordered);
    }

    public Task<DiagnosticUserRecord?> CreateAsync(
        string username,
        string passwordHash,
        string role,
        CancellationToken cancellationToken = default)
    {
        string? normalized = username?.Trim();
        if (string.IsNullOrWhiteSpace(normalized))
        {
            return Task.FromResult<DiagnosticUserRecord?>(null);
        }

        if (_users.Any(u => string.Equals(u.Username, normalized, StringComparison.OrdinalIgnoreCase)))
        {
            return Task.FromResult<DiagnosticUserRecord?>(null); // doublon.
        }

        DateTimeOffset now = DateTimeOffset.UtcNow;
        var record = new DiagnosticUserRecord
        {
            Id = _nextId++,
            Username = normalized,
            PasswordHash = passwordHash,
            Role = role,
            Enabled = true,
            CreatedAtUtc = now,
            UpdatedAtUtc = now,
            PasswordChangedAtUtc = now,
            LastLoginAtUtc = null
        };
        _users.Add(record);
        return Task.FromResult<DiagnosticUserRecord?>(record);
    }

    public Task<bool> SetEnabledAsync(
        long id,
        bool enabled,
        CancellationToken cancellationToken = default)
    {
        DiagnosticUserRecord? user = _users.FirstOrDefault(u => u.Id == id);
        if (user is null)
        {
            return Task.FromResult(false);
        }

        user.Enabled = enabled;
        user.UpdatedAtUtc = DateTimeOffset.UtcNow;
        return Task.FromResult(true);
    }

    public Task<bool> SetRoleAsync(
        long id,
        string role,
        CancellationToken cancellationToken = default)
    {
        DiagnosticUserRecord? user = _users.FirstOrDefault(u => u.Id == id);
        if (user is null)
        {
            return Task.FromResult(false);
        }

        user.Role = role;
        user.UpdatedAtUtc = DateTimeOffset.UtcNow;
        return Task.FromResult(true);
    }

    public Task<bool> UpdatePasswordHashAsync(
        long id,
        string passwordHash,
        CancellationToken cancellationToken = default)
    {
        DiagnosticUserRecord? user = _users.FirstOrDefault(u => u.Id == id);
        if (user is null)
        {
            return Task.FromResult(false);
        }

        user.PasswordHash = passwordHash;
        user.PasswordChangedAtUtc = DateTimeOffset.UtcNow;
        user.UpdatedAtUtc = DateTimeOffset.UtcNow;
        return Task.FromResult(true);
    }

    public Task UpdateLastLoginAsync(
        string username,
        CancellationToken cancellationToken = default)
    {
        DiagnosticUserRecord? user = _users.FirstOrDefault(u =>
            string.Equals(u.Username, username?.Trim(), StringComparison.OrdinalIgnoreCase));
        if (user is not null)
        {
            user.LastLoginAtUtc = DateTimeOffset.UtcNow;
        }

        return Task.CompletedTask;
    }
}