using SharepointToolbox.Core.Models;
using SharepointToolbox.Infrastructure.Persistence;

namespace SharepointToolbox.Services;

public class ProfileService
{
    private readonly ProfileRepository _repository;

    public ProfileService(ProfileRepository repository)
    {
        _repository = repository;
    }

    public Task<IReadOnlyList<TenantProfile>> GetProfilesAsync()
        => _repository.LoadAsync();

    public async Task AddProfileAsync(TenantProfile profile)
    {
        if (string.IsNullOrWhiteSpace(profile.Name))
            throw new ArgumentException("Profile name must not be empty.", nameof(profile));

        if (string.IsNullOrWhiteSpace(profile.TenantUrl) ||
            !Uri.TryCreate(profile.TenantUrl, UriKind.Absolute, out _))
            throw new ArgumentException("TenantUrl must be a valid absolute URL.", nameof(profile));

        // ClientId is optional at creation time: the user can register the app from within
        // the tool, which will populate ClientId/AppId on the profile afterwards.
        profile.ClientId ??= string.Empty;

        var existing = (await _repository.LoadAsync()).ToList();
        existing.Add(profile);
        await _repository.SaveAsync(existing);
    }

    public async Task RenameProfileAsync(string existingName, string newName)
    {
        var profiles = (await _repository.LoadAsync()).ToList();
        var target = profiles.FirstOrDefault(p => p.Name == existingName)
            ?? throw new KeyNotFoundException($"Profile '{existingName}' not found.");

        target.Name = newName;
        await _repository.SaveAsync(profiles);
    }

    public async Task DeleteProfileAsync(string name)
    {
        var profiles = (await _repository.LoadAsync()).ToList();
        var target = profiles.FirstOrDefault(p => p.Name == name)
            ?? throw new KeyNotFoundException($"Profile '{name}' not found.");

        profiles.Remove(target);
        await _repository.SaveAsync(profiles);
    }

    public async Task UpdateProfileAsync(TenantProfile profile)
    {
        var profiles = (await _repository.LoadAsync()).ToList();
        var idx = profiles.FindIndex(p => p.Name == profile.Name);
        if (idx < 0) throw new KeyNotFoundException($"Profile '{profile.Name}' not found.");
        profiles[idx] = profile;
        await _repository.SaveAsync(profiles);
    }
}
