using Microsoft.AspNetCore.Mvc;
using CodePlay.Core.Models;
using System.Collections.Concurrent;

namespace CodePlay.WebAPI.Controllers;

[ApiController]
[Route("api/[controller]")]
public class ProjectController : ControllerBase
{
    private static readonly ConcurrentDictionary<Guid, ProjectInfo> _projects = new();
    private readonly ILogger<ProjectController> _logger;

    public ProjectController(ILogger<ProjectController> logger) => _logger = logger;

    [HttpPost]
    public ActionResult<ProjectInfo> Create([FromBody] ProjectCreateRequest request)
    {
        var project = new ProjectInfo
        {
            Id = Guid.NewGuid(),
            Name = request.Name ?? "Untitled",
            SourceLanguage = request.SourceLanguage,
            TargetLanguage = request.TargetLanguage,
            CreatedAt = DateTime.UtcNow,
            Files = new List<string>()
        };
        _projects[project.Id] = project;
        return Created($"/api/projects/{project.Id}", project);
    }

    [HttpGet]
    public ActionResult<List<ProjectInfo>> GetAll() => _projects.Values.OrderByDescending(p => p.CreatedAt).ToList();

    [HttpGet("{id:guid}")]
    public ActionResult<ProjectInfo> GetById(Guid id) => _projects.TryGetValue(id, out var p) ? p : NotFound();

    [HttpPost("{id:guid}/files")]
    public ActionResult<ProjectInfo> AddFile(Guid id, [FromBody] FileAddRequest req)
    {
        if (!_projects.TryGetValue(id, out var p)) return NotFound();
        if (!p.Files.Contains(req.FileName)) { p.Files.Add(req.FileName); p.UpdatedAt = DateTime.UtcNow; }
        return Ok(p);
    }

    [HttpDelete("{id:guid}")]
    public IActionResult Delete(Guid id) => _projects.TryRemove(id, out _) ? NoContent() : NotFound();
}

public class ProjectCreateRequest { public string? Name { get; set; } public string SourceLanguage { get; set; } = ""; public string TargetLanguage { get; set; } = ""; }
public class FileAddRequest { public string FileName { get; set; } = ""; }