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

namespace Distribution.Features.Po;

[ApiController]
[Route("api/purchase-orders")]
public class PoController(PoService service, ICurrentUserService currentUser) : ControllerBase
{
    [HttpGet]
    public async Task<IActionResult> GetAll([FromQuery] Guid? supplierId, [FromQuery] PurchaseOrderStatus? status) =>
        Ok(await service.GetAllAsync(supplierId, status));

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

    [HttpPost]
    public async Task<IActionResult> Create(CreatePoRequest 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.CreatedByUserId;
        if (userId is null) return BadRequest(new { error = "CreatedByUserId is required while auth is unavailable" });
        try
        {
            var result = await service.CreateAsync(request, userId.Value, ct);
            return CreatedAtAction(nameof(GetById), new { id = result.Id }, result);
        }
        catch (InvalidOperationException ex) { return Conflict(new { error = ex.Message }); }
    }

    [HttpPut("{id:guid}")]
    public async Task<IActionResult> Update(Guid id, UpdatePoRequest request, CancellationToken ct)
    {
        try
        {
            var result = await service.UpdateAsync(id, request, ct);
            return result is null ? NotFound() : Ok(result);
        }
        catch (InvalidOperationException ex) { return Conflict(new { error = ex.Message }); }
    }

    [HttpPost("{id:guid}/close")]
    public async Task<IActionResult> Close(Guid id, CancellationToken ct)
    {
        try
        {
            var result = await service.CloseAsync(id, ct);
            return result is null ? NotFound() : Ok(result);
        }
        catch (InvalidOperationException ex) { return Conflict(new { error = ex.Message }); }
    }

    [HttpPost("{id:guid}/cancel")]
    public async Task<IActionResult> Cancel(Guid id, CancelPoRequest request, CancellationToken ct)
    {
        try
        {
            var result = await service.CancelAsync(id, request, ct);
            return result is null ? NotFound() : Ok(result);
        }
        catch (InvalidOperationException ex) { return Conflict(new { error = ex.Message }); }
    }

    [HttpPost("{id:guid}/items/{itemId:guid}/cancel")]
    public async Task<IActionResult> CancelLine(Guid id, Guid itemId, CancelPoLineRequest request, CancellationToken ct)
    {
        try
        {
            var result = await service.CancelLineAsync(id, itemId, request, ct);
            return result is null ? NotFound() : Ok(result);
        }
        catch (InvalidOperationException ex) { return Conflict(new { error = ex.Message }); }
    }

    [HttpPost("{id:guid}/match-invoice")]
    public async Task<IActionResult> MatchInvoice(Guid id, [FromQuery] Guid? invoiceId, [FromQuery] Guid? grnId)
    {
        var result = await service.MatchInvoiceToPoAsync(id, invoiceId, grnId);
        return result is null ? NotFound() : Ok(result);
    }

    [HttpPost("{id:guid}/resolve-variance")]
    public async Task<IActionResult> ResolveVariance(Guid id, ResolveInvoiceVarianceRequest request, CancellationToken ct)
    {
        try
        {
            var result = await service.ResolveInvoiceVarianceAsync(id, request, ct);
            return result is null ? NotFound() : Ok(result);
        }
        catch (InvalidOperationException ex) { return Conflict(new { error = ex.Message }); }
    }
}