meezi/src/Meezi.API/Controllers/BillingController.cs

using FluentValidation;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Meezi.API.Models.Billing;
using Meezi.API.Services;
using Meezi.Core.Interfaces;
using Meezi.Shared;

namespace Meezi.API.Controllers;

[ApiController]
public class BillingController : ControllerBase
{
    private readonly IBillingService _billing;
    private readonly IValidator<SubscribeRequest> _subscribeValidator;

    public BillingController(IBillingService billing, IValidator<SubscribeRequest> subscribeValidator)
    {
        _billing = billing;
        _subscribeValidator = subscribeValidator;
    }

    [Authorize]
    [HttpPost("api/billing/subscribe")]
    public async Task<IActionResult> Subscribe(
        [FromBody] SubscribeRequest request,
        ITenantContext tenant,
        CancellationToken ct)
    {
        if (string.IsNullOrEmpty(tenant.CafeId))
            return Unauthorized();
        if (tenant.Role != Core.Enums.EmployeeRole.Owner)
        {
            return StatusCode(403, new ApiResponse<object>(false, null,
                new ApiError("OWNER_REQUIRED", "Only the cafe owner can manage subscription billing.")));
        }

        var validation = await _subscribeValidator.ValidateAsync(request, ct);
        if (!validation.IsValid)
        {
            var first = validation.Errors.First();
            return BadRequest(new ApiResponse<object>(false, null, new ApiError("VALIDATION_ERROR", first.ErrorMessage, first.PropertyName)));
        }

        var (data, code, message) = await _billing.InitiateSubscriptionAsync(tenant.CafeId, request, ct);
        if (data is null)
            return BadRequest(new ApiResponse<object>(false, null, new ApiError(code ?? "ERROR", message ?? "Failed.")));

        return Ok(new ApiResponse<SubscribeResponse>(true, data));
    }

    [AllowAnonymous]
    [HttpGet("api/billing/verify")]
    public async Task<IActionResult> Verify(
        [FromQuery] string Authority,
        [FromQuery] string? Status,
        CancellationToken ct)
    {
        var result = await _billing.VerifyZarinPalAsync(Authority, Status, ct);
        return Redirect(result.RedirectUrl);
    }

    [AllowAnonymous]
    [HttpGet("api/billing/verify/snapppay")]
    public async Task<IActionResult> VerifySnappPay(
        [FromQuery] string? paymentToken,
        [FromQuery] string? state,
        CancellationToken ct)
    {
        var result = await _billing.VerifySnappPayAsync(paymentToken, state, ct);
        return Redirect(result.RedirectUrl);
    }

    [AllowAnonymous]
    [HttpGet("api/billing/verify/tara")]
    public async Task<IActionResult> VerifyTara(
        [FromQuery] string? traceNumber,
        [FromQuery] string? status,
        CancellationToken ct)
    {
        var result = await _billing.VerifyTaraAsync(traceNumber, status, ct);
        return Redirect(result.RedirectUrl);
    }

    [Authorize]
    [HttpGet("api/billing/payment-methods")]
    public async Task<IActionResult> PaymentMethods(CancellationToken ct)
    {
        var methods = await _billing.GetPaymentMethodsAsync(ct);
        return Ok(new ApiResponse<IReadOnlyList<PaymentMethodDto>>(true, methods));
    }

    [Authorize]
    [HttpGet("api/billing/status")]
    public async Task<IActionResult> Status(ITenantContext tenant, CancellationToken ct)
    {
        if (string.IsNullOrEmpty(tenant.CafeId) || tenant.PlanTier is null)
            return Unauthorized();

        var data = await _billing.GetStatusAsync(tenant.CafeId, tenant.PlanTier.Value, ct);
        if (data is null)
            return NotFound(new ApiResponse<object>(false, null, new ApiError("NOT_FOUND", "Cafe not found.")));

        return Ok(new ApiResponse<BillingStatusDto>(true, data));
    }
}