using Distribution.Infra.Authorization;
using Microsoft.AspNetCore.Mvc;

namespace Distribution.Features.Grn;

[ApiController]
public class GrnController(GrnService service, ICurrentUserService currentUser) : ControllerBase
{
    [HttpGet("api/goods-receipts")]
    public async Task<IActionResult> GetAll(
        [FromQuery] Guid? purchaseOrderId,
        [FromQuery] int page = 1,
        [FromQuery] int pageSize = 20)
    {
        var result = await service.GetAllAsync(purchaseOrderId, page, pageSize);
        return Ok(result);
    }

    [HttpGet("api/goods-receipts/{id:guid}")]
    public async Task<IActionResult> GetById(Guid id)
    {
        var result = await service.GetByIdAsync(id);
        return result is null ? NotFound() : Ok(result);
    }

    [HttpPost("api/goods-receipts")]
    public async Task<IActionResult> CreateFlat(CreateFlatGrnRequest request, CancellationToken ct)
    {
        // TEMPORARY: currentUser.UserId is always unset due to the broken auth middleware
        // (testbug.md #28) — fall back to the explicitly supplied user until that's fixed.
        var userId = currentUser.UserId ?? request.ReceivedByUserId;
        if (userId is null) return BadRequest(new { error = "ReceivedByUserId is required while auth is unavailable" });
        try
        {
            var inner = new CreateGrnRequest(request.WarehouseId, request.Items);
            var result = await service.CreateAsync(request.PurchaseOrderId, inner, userId.Value, ct);
            return CreatedAtAction(nameof(GetById), new { id = result.Id }, result);
        }
        catch (InvalidOperationException ex) { return Conflict(new { error = ex.Message }); }
    }

    [HttpGet("api/purchase-orders/{id:guid}/goods-receipts")]
    public async Task<IActionResult> GetByPurchaseOrder(Guid id) =>
        Ok(await service.GetByPurchaseOrderIdAsync(id));

    [HttpPost("api/purchase-orders/{id:guid}/goods-receipts")]
    public async Task<IActionResult> Create(Guid id, CreateGrnRequest request, CancellationToken ct)
    {
        var userId = currentUser.UserId ?? request.ReceivedByUserId;
        if (userId is null) return BadRequest(new { error = "ReceivedByUserId is required while auth is unavailable" });
        try
        {
            var result = await service.CreateAsync(id, request, userId.Value, ct);
            return CreatedAtAction(nameof(GetById), new { id = result.Id }, result);
        }
        catch (InvalidOperationException ex) { return Conflict(new { error = ex.Message }); }
    }
}