using SurrealDb.Net;
using TarninaHub.Application.Abstractions;
using TarninaHub.Application.Dtos;
using TarninaHub.Application.Models;

namespace TarninaHub.Infrastructure.Persistence;

public sealed class UserService : IUserService
{
    private const string SelectUserFields =
        "type::string(id) AS id, phone, email, role, type::string(organization) AS organization";

    private readonly ISurrealDbClient _client;

    public UserService(ISurrealDbClient client)
    {
        _client = client;
    }

    public async Task<UserAccount?> FindByPhoneAsync(string phone, CancellationToken cancellationToken)
    {
        var response = await _client.RawQuery(
            $"SELECT {SelectUserFields} FROM user WHERE phone = $phone LIMIT 1;",
            new Dictionary<string, object?> { ["phone"] = phone },
            cancellationToken);

        response.EnsureAllOks();

        var rows = response.GetValue<List<UserRow>>(0) ?? [];

        return rows.Count > 0 ? Map(rows[0]) : null;
    }

    public async Task<UserAccount?> GetByIdAsync(string userId, CancellationToken cancellationToken)
    {
        var (table, id) = SurrealRecordId.Split(userId);

        var response = await _client.RawQuery(
            $"SELECT {SelectUserFields} FROM type::record($table, $id) LIMIT 1;",
            new Dictionary<string, object?> { ["table"] = table, ["id"] = id },
            cancellationToken);

        response.EnsureAllOks();

        var rows = response.GetValue<List<UserRow>>(0) ?? [];

        return rows.Count > 0 ? Map(rows[0]) : null;
    }

    public async Task<UserAccount?> CreateAsync(
        RegisterRequest request,
        string role,
        CancellationToken cancellationToken)
    {
        var emailClause = string.IsNullOrWhiteSpace(request.Email) ? string.Empty : ", email = $email";

        var parameters = new Dictionary<string, object?>
        {
            ["phone"] = request.Phone,
            ["password"] = request.Password,
            ["role"] = role,
        };

        if (!string.IsNullOrWhiteSpace(request.Email))
        {
            parameters["email"] = request.Email;
        }

        var response = await _client.RawQuery(
            "CREATE user SET phone = $phone" + emailClause + ", " +
            "password = crypto::argon2::generate($password), role = $role; " +
            $"SELECT {SelectUserFields} FROM user WHERE phone = $phone LIMIT 1;",
            parameters,
            cancellationToken);

        response.EnsureAllOks();

        var rows = response.GetValue<List<UserRow>>(1) ?? [];

        return rows.Count > 0 ? Map(rows[0]) : null;
    }

    public async Task<bool> VerifyCredentialsAsync(
        string phone,
        string password,
        CancellationToken cancellationToken)
    {
        var response = await _client.RawQuery(
            "SELECT crypto::argon2::compare(password, $password) AS password_ok " +
            "FROM user WHERE phone = $phone LIMIT 1;",
            new Dictionary<string, object?>
            {
                ["phone"] = phone,
                ["password"] = password,
            },
            cancellationToken);

        response.EnsureAllOks();

        var rows = response.GetValue<List<PasswordCheckRow>>(0) ?? [];

        return rows.Count > 0 && rows[0].PasswordOk;
    }

    private static UserAccount Map(UserRow row) => new(
        row.Id,
        row.Phone,
        string.IsNullOrWhiteSpace(row.Email) ? null : row.Email,
        row.Role,
        NormalizeRecordId(row.Organization));

    private static string? NormalizeRecordId(string? value) =>
        string.IsNullOrWhiteSpace(value) || value is "NONE" or "NULL" ? null : value;
}