using MediatR;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Mws.Application.Common;
using Mws.Application.Tasks;
using TaskPriority = Mws.Domain.Tasks.TaskPriority;
using TaskStatus = Mws.Domain.Tasks.TaskStatus;

namespace Mws.Api.Controllers;

[ApiController]
[Route("api")]
[Authorize]
public class TasksController(ISender sender) : ControllerBase
{
    [HttpGet("tasks/search")]
    public async Task<ActionResult<List<TaskDto>>> Search([FromQuery] string? q, CancellationToken ct)
    {
        return Ok(await sender.Send(new SearchTasksQuery(User.GetUserId(), q ?? string.Empty), ct));
    }

    [HttpGet("projects/{projectId:guid}/tasks")]
    public async Task<ActionResult<List<TaskDto>>> GetAll(
        Guid projectId,
        [FromQuery] string? status,
        [FromQuery] string? priority,
        [FromQuery] Guid? assigneeId,
        CancellationToken ct)
    {
        var statusValue = ParseOptional<TaskStatus>(status);
        var priorityValue = ParseOptional<TaskPriority>(priority);
        return Ok(await sender.Send(new GetTasksQuery(User.GetUserId(), projectId, statusValue, priorityValue, assigneeId), ct));
    }

    [HttpPost("projects/{projectId:guid}/tasks")]
    public async Task<ActionResult<TaskDto>> Create(Guid projectId, [FromBody] CreateTaskRequest request, CancellationToken ct)
    {
        var result = await sender.Send(new CreateTaskCommand(User.GetUserId(), projectId, request), ct);
        return CreatedAtAction(nameof(Get), new { id = result.Id }, result);
    }

    [HttpGet("tasks/{id:guid}")]
    public async Task<ActionResult<TaskDto>> Get(Guid id, CancellationToken ct)
    {
        return Ok(await sender.Send(new GetTaskQuery(User.GetUserId(), id), ct));
    }

    [HttpPut("tasks/{id:guid}")]
    public async Task<ActionResult<TaskDto>> Update(Guid id, [FromBody] UpdateTaskRequest request, CancellationToken ct)
    {
        return Ok(await sender.Send(new UpdateTaskCommand(User.GetUserId(), id, request), ct));
    }

    [HttpDelete("tasks/{id:guid}")]
    public async Task<IActionResult> Delete(Guid id, CancellationToken ct)
    {
        await sender.Send(new DeleteTaskCommand(User.GetUserId(), id), ct);
        return NoContent();
    }

    private static TEnum? ParseOptional<TEnum>(string? value) where TEnum : struct, Enum
    {
        if (string.IsNullOrWhiteSpace(value))
        {
            return null;
        }
        return Enum.TryParse<TEnum>(value, ignoreCase: true, out var result) ? result : throw new BadRequestException($"Invalid {typeof(TEnum).Name}: {value}");
    }
}