#nullable enable
using System.Linq;
using System.Threading.Tasks;
using BTCPayServer.Abstractions.Constants;
using BTCPayServer.Abstractions.Extensions;
using BTCPayServer.Client;
using BTCPayServer.Client.Models;
using BTCPayServer.Data;
using BTCPayServer.Payments;
using BTCPayServer.PayoutProcessors;
using BTCPayServer.PayoutProcessors.Lightning;
using BTCPayServer.Services.Invoices;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Cors;
using Microsoft.AspNetCore.Mvc;
using PayoutProcessorData = BTCPayServer.Data.PayoutProcessorData;

namespace BTCPayServer.Controllers.Greenfield
{
    [ApiController]
    [Authorize(AuthenticationSchemes = AuthenticationSchemes.Greenfield)]
    [EnableCors(CorsPolicies.All)]
    public class GreenfieldStoreAutomatedLightningPayoutProcessorsController : ControllerBase
    {
        private readonly PayoutProcessorService _payoutProcessorService;
        private readonly EventAggregator _eventAggregator;

        public GreenfieldStoreAutomatedLightningPayoutProcessorsController(PayoutProcessorService payoutProcessorService,
            EventAggregator eventAggregator)
        {
            _payoutProcessorService = payoutProcessorService;
            _eventAggregator = eventAggregator;
        }

        [Authorize(Policy = Policies.CanViewStoreSettings, AuthenticationSchemes = AuthenticationSchemes.Greenfield)]
        [HttpGet("~/api/v1/stores/{storeId}/payout-processors/LightningAutomatedPayoutSenderFactory")]
        [HttpGet("~/api/v1/stores/{storeId}/payout-processors/LightningAutomatedPayoutSenderFactory/{paymentMethod}")]
        public async Task<IActionResult> GetStoreLightningAutomatedPayoutProcessors(
            string storeId, string? paymentMethod)
        {
            var paymentMethodId = !string.IsNullOrEmpty(paymentMethod) ? PaymentMethodId.Parse(paymentMethod) : null;
            var configured =
                await _payoutProcessorService.GetProcessors(
                    new PayoutProcessorService.PayoutProcessorQuery()
                    {
                        Stores = new[] { storeId },
                        Processors = new[] { LightningAutomatedPayoutSenderFactory.ProcessorName },
                        PaymentMethods = paymentMethodId is null ? null : new[] { paymentMethodId }
                    });

            return Ok(configured.Select(ToModel).ToArray());
        }

        private static LightningAutomatedPayoutSettings ToModel(PayoutProcessorData data)
        {
            var blob = data.HasTypedBlob<LightningAutomatedPayoutBlob>().GetBlob() ?? new LightningAutomatedPayoutBlob();
            return new LightningAutomatedPayoutSettings()
            {
                PaymentMethod = data.PaymentMethod,
                IntervalSeconds = blob.Interval,
                CancelPayoutAfterFailures = blob.CancelPayoutAfterFailures,
                ProcessNewPayoutsInstantly = blob.ProcessNewPayoutsInstantly
            };
        }

        private static LightningAutomatedPayoutBlob FromModel(LightningAutomatedPayoutSettings data)
        {
            return new LightningAutomatedPayoutBlob() { 
                Interval = data.IntervalSeconds, 
                CancelPayoutAfterFailures = data.CancelPayoutAfterFailures,
                ProcessNewPayoutsInstantly = data.ProcessNewPayoutsInstantly
            };
        }

        [Authorize(Policy = Policies.CanModifyStoreSettings, AuthenticationSchemes = AuthenticationSchemes.Greenfield)]
        [HttpPut("~/api/v1/stores/{storeId}/payout-processors/LightningAutomatedPayoutSenderFactory/{paymentMethod}")]
        public async Task<IActionResult> UpdateStoreLightningAutomatedPayoutProcessor(
            string storeId, string paymentMethod, LightningAutomatedPayoutSettings request)
        {
            AutomatedPayoutConstants.ValidateInterval(ModelState, request.IntervalSeconds, nameof(request.IntervalSeconds));
            if (!ModelState.IsValid)
                return this.CreateValidationError(ModelState);
            var paymentMethodId = PaymentMethodId.Parse(paymentMethod);
            var activeProcessor =
                (await _payoutProcessorService.GetProcessors(
                    new PayoutProcessorService.PayoutProcessorQuery()
                    {
                        Stores = new[] { storeId },
                        Processors = new[] { LightningAutomatedPayoutSenderFactory.ProcessorName },
                        PaymentMethods = new[] { paymentMethodId }
                    }))
                .FirstOrDefault();
            activeProcessor ??= new PayoutProcessorData();
            activeProcessor.HasTypedBlob<LightningAutomatedPayoutBlob>().SetBlob(FromModel(request));
            activeProcessor.StoreId = storeId;
            activeProcessor.PaymentMethod = paymentMethodId.ToString();
            activeProcessor.Processor = LightningAutomatedPayoutSenderFactory.ProcessorName;
            var tcs = new TaskCompletionSource();
            _eventAggregator.Publish(new PayoutProcessorUpdated()
            {
                Data = activeProcessor,
                Id = activeProcessor.Id,
                Processed = tcs
            });
            await tcs.Task;
            return Ok(ToModel(activeProcessor));
        }
    }
}