OnProfNext/OnProfNext.Client/Services/ProjectApiService.cs

using OnProfNext.Shared.Models.DTOs;
using System.Net.Http.Json;

namespace OnProfNext.Client.Services
{
    public class ProjectApiService
    {
        private readonly HttpClient _httpClient;

        public ProjectApiService(HttpClient httpClient)
        {
            _httpClient = httpClient;
        }

        // GET: Alle Projekte abrufen
        public async Task<(bool Success, List<ProjectDto>? Data, string? Error)> GetProjectsAsync()
        {
            try
            {
                var projects = await _httpClient.GetFromJsonAsync<List<ProjectDto>>("api/project");
                return (true, projects ?? new(), null);
            }
            catch (HttpRequestException)
            {
                return (false, null, "Keine Verbindung zum Server. Bitte später erneut versuchen.");
            }
            catch (Exception ex)
            {
                return (false, null, $"Unerwarteter Fehler: {ex.Message}");
            }
        }

        //GET: Ein einzelnes Projekt abrufen
        public async Task<(bool Success, ProjectDto? Data, string? Error)> GetProjectAsync(int id)
        {
            try
            {
                var project = await _httpClient.GetFromJsonAsync<ProjectDto>($"api/project/{id}");
                if (project == null)
                    return (false, null, "Projekt nicht gefunden.");

                return (true, project, null);
            }
            catch (HttpRequestException)
            {
                return (false, null, "Keine Verbindung zum Server. Bitte später erneut versuchen.");
            }
            catch (Exception ex)
            {
                return (false, null, $"Unerwarteter Fehler: {ex.Message}");
            }
        }

        // POST: Neues Projekt erstellen
        public async Task<(bool Success, string? Error)> CreateProjectAsync(ProjectCreateDto dto)
        {
            try
            {
                var response = await _httpClient.PostAsJsonAsync("api/project", dto);
                if (!response.IsSuccessStatusCode)
                {
                    return (false, $"Fehler beim Anlegen: {response.ReasonPhrase}");
                }
                return (true, null);
            }
            catch (HttpRequestException)
            {
                return (false, "Server nicht erreichbar.");
            }
            catch (Exception ex)
            {
                return (false, ex.Message);
            }
        }

        // PUT: Bestehendes Projekt aktualisieren
        public async Task<(bool Success, string? Error)> UpdateProjectAsync(int id, ProjectCreateDto dto)
        {
            try
            {
                var response = await _httpClient.PutAsJsonAsync($"api/project/{id}", dto);
                if (!response.IsSuccessStatusCode)
                {
                    return (false, $"Fehler beim Aktualisieren: {response.ReasonPhrase}");
                }
                return (true, null);
            }
            catch (HttpRequestException)
            {
                return (false, "Server nicht erreichbar.");
            }
            catch (Exception ex)
            {
                return (false, ex.Message);
            }
        }

        // DELETE: Projekt löschen
        public async Task<(bool Success, string? Error)> DeleteProjectAsync(int id)
        {
            try
            {
                var response = await _httpClient.DeleteAsync($"api/project/{id}");
                if (!response.IsSuccessStatusCode)
                {
                    return (false, $"Fehler beim Löschen: {response.ReasonPhrase}");
                }
                return (true, null);
            }
            catch (HttpRequestException)
            {
                return (false, "Server nicht erreichbar.");
            }
            catch (Exception ex)
            {
                return (false, ex.Message);
            }
        }
    }
}