using AutoMapper;
using RecNet.Application.Common.Interfaces;
using RecNet.Domain.GameVersions;
using RecNet.Domain.Profiles;
using ProfileEntity = RecNet.Domain.Profiles.Profile;

namespace RecNet.Application.Profiles;

public class ProfileService(
    IEnumerable<IPlatformAuthValidator> validators,
    IGameVersionRepository gameVersionRepository,
    IProfileRepository profileRepository,
    IConfigService configService,
    NameGenerator nameGenerator,
    ITokenService tokenService,
    IMapper mapper) : IProfileService
{
    public async Task<ProfileDTO?> GetProfileAsync(Guid profileId, CancellationToken ct = default)
    {
        var profile = await profileRepository.GetByIdAsync(profileId, ct);

        return profile is null
            ? null
            : mapper.Map<ProfileDTO>(profile);
    }

    public async Task<IReadOnlyList<ProfileDTO>> GetProfilesAsync(
        List<Guid> profileIds,
        CancellationToken ct = default)
    {
        var profiles = await profileRepository.GetByIdsAsync(profileIds, ct);

        return mapper.Map<List<ProfileDTO>>(profiles);
    }

    public async Task<LoginProfileResult> LoginAsync(
        LoginProfileCommand command,
        CancellationToken ct = default)
    {
        // 1. Validate Game Version
        if (string.IsNullOrWhiteSpace(command.AppVersion))
            return LoginProfileResult.Fail("App version is required.");

        var isValidGameVersion = await gameVersionRepository.IsValidAsync(command.AppVersion, ct);
        if (!isValidGameVersion)
            return LoginProfileResult.Fail("Invalid app version.");
        
        // 2. Validate Platform Authentication
        var validator = validators.FirstOrDefault(x => x.PlatformType == command.PlatformType);
        if (validator is null)
            return LoginProfileResult.Fail("Invalid platform type");
        
        var ignoreAuthValidation = await configService.GetAsync("Profiles:IgnoreAuthValidation", true, ct);
        
        var auth = await validator.ValidateAsync(
            command.PlatformAuthentication,
            command.PlatformId,
            ct);
        if (!auth.Succeeded && !ignoreAuthValidation)
            return LoginProfileResult.Fail($"Platform Auth Failed: {auth.Message}");
        
        // 3. Get or Create Profile
        var profile = await profileRepository.GetByPlatform(
            command.PlatformType,
            command.PlatformId,
            ct);

        if (profile is null)
        {
            var name = await nameGenerator.GenerateAsync(ct);
            
            profile = ProfileEntity.Create(
                name,
                command.PlatformType,
                command.PlatformId);

            await profileRepository.AddAsync(profile, ct);
        }
        
        if (profile.IsBanned)
            return LoginProfileResult.Fail("Profile is banned");

        profile.RecordSuccessfulLogin(command.DeviceId, auth.Name);

        await profileRepository.SaveChangesAsync(ct);

        var token = tokenService.GenerateProfileToken(profile);

        return LoginProfileResult.Success(
            profile: mapper.Map<ProfileDTO>(profile),
            accessToken: token.AccessToken,
            expiresIn: token.ExpiresIn
        );
    }
}