using Fake.Application;
using Fake.DependencyInjection;
using Oms.Domain.ChannelsAggregate.Consts;
using Oms.Domain.ChannelsAggregate.Entities;
using Oms.Domain.ChannelsAggregate.Repositories;
using Oms.Domain.OrdersAggregate.Consts;
using Oms.Domain.OrdersAggregate.Entities;
using Oms.Domain.OrdersAggregate.Repositories;
using Oms.Domain.Shared.Enums;

namespace Oms.Application.Services.Orders.Issues;

public sealed class ProblematicMarkRequest
{
    public string IssueType { get; set; } = string.Empty;

    public string Title { get; set; } = string.Empty;

    public string Content { get; set; } = string.Empty;

    public int? IssueTemplateId { get; set; }

    public string? NotifyMethod { get; set; }

    public string? HandlerNames { get; set; }

    public string? Remark { get; set; }

    public IEnumerable<int>? ExtraReceiverUserIds { get; set; }
}

public class OrderExceptionWorkflowService(
    IOrderRepository orderRepository,
    IOrderExceptionEventRepository orderExceptionEventRepository,
    IIssueTemplateRepository issueTemplateRepository,
    IssueHandlerResolver issueHandlerResolver,
    OrderIssueNotificationService issueNotificationService) : IScopedDependency
{
    public async Task<string?> TryMarkProblematicAsync(
        Order order,
        ProblematicMarkRequest request,
        int operatorUserId,
        bool sendNotification)
    {
        var current = await orderRepository.FirstOrDefaultAsync(x => x.Id == order.Id) ?? order;
        if (!OrderExceptionStatusRules.CanMarkException(current.OrderStatus))
        {
            return OrderExceptionStatusRules.GetForbiddenReason(current.OrderStatus);
        }

        IssueTemplate? template = null;
        if (request.IssueTemplateId is int templateId && templateId > 0)
        {
            template = await issueTemplateRepository.FirstOrDefaultAsync(x => x.Id == templateId);
        }

        IssueHandlerResolution handlerResolution;
        try
        {
            handlerResolution = await issueHandlerResolver.ResolveAsync(current, template, request.HandlerNames);
        }
        catch (BusinessException ex)
        {
            return ex.Message;
        }

        var context = IssuePlaceholderContext.FromOrder(current, request.IssueType, request.Title);
        var renderedTitle = IssuePlaceholderRenderer.Render(request.Title, context);
        var renderedContent = IssuePlaceholderRenderer.Render(request.Content, context);

        var notifyMethod = request.NotifyMethod;
        if (IssueHandlerTypeCodes.IsCustomer(handlerResolution.HandlerType))
        {
            notifyMethod = IssueNotifyMethodCodes.InApp;
        }

        var fromStatus = current.OrderStatus;
        var isAppend = string.Equals(fromStatus, OrderStatusCodes.Problematic, StringComparison.OrdinalIgnoreCase);
        if (!isAppend)
        {
            current.PreviousOrderStatus = fromStatus;
            current.OrderStatus = OrderStatusCodes.Problematic;
        }

        current.HandleStatus = OrderHandleStatusCodes.Pending;
        current.IssueType = request.IssueType;
        current.IssueTitle = renderedTitle;
        current.IssueContent = renderedContent;
        current.IssueTemplateId = request.IssueTemplateId;
        current.IssueRemark = request.Remark;
        current.IssueTime = DateTime.Now;
        current.ClaimType = null;
        current.ClaimAmount = null;
        current.ClaimCurrency = null;
        current.ClaimReason = null;
        current.ClaimTime = null;

        await orderRepository.UpdateAsync(current);
        order.OrderStatus = current.OrderStatus;
        order.PreviousOrderStatus = current.PreviousOrderStatus;
        order.HandleStatus = current.HandleStatus;
        order.IssueType = current.IssueType;
        order.IssueTitle = current.IssueTitle;
        order.IssueContent = current.IssueContent;
        order.IssueTemplateId = current.IssueTemplateId;
        order.IssueRemark = current.IssueRemark;
        order.IssueTime = current.IssueTime;
        await orderExceptionEventRepository.InsertAsync(new OrderExceptionEvent
        {
            OrderId = order.Id,
            EventType = OrderExceptionEventTypeCodes.MarkProblematic,
            FromStatus = fromStatus,
            ToStatus = OrderStatusCodes.Problematic,
            FromHandleStatus = null,
            ToHandleStatus = OrderHandleStatusCodes.Pending,
            IssueType = request.IssueType,
            Title = renderedTitle,
            Content = renderedContent,
            IssueTemplateId = request.IssueTemplateId,
            NotifyMethod = notifyMethod,
            HandlerNames = handlerResolution.HandlerNames,
            HandlerType = handlerResolution.HandlerType,
            HandlerUserId = handlerResolution.HandlerUserId,
            Remark = request.Remark
        });

        if (sendNotification && !string.IsNullOrWhiteSpace(notifyMethod))
        {
            var notifyUserIds = handlerResolution.NotifyUserIds.Count > 0
                ? handlerResolution.NotifyUserIds
                : null;
            await issueNotificationService.DispatchAsync(
                current,
                renderedTitle,
                renderedContent,
                notifyMethod,
                operatorUserId,
                notifyUserIds,
                request.ExtraReceiverUserIds);
        }

        return null;
    }

    public async Task<ProblematicMarkRequest?> BuildRequestFromTemplateAsync(
        string? organizationId,
        string issueType,
        string? titleOverride,
        string? contentOverride,
        string? remark)
    {
        var normalizedType = issueType.Trim().ToLowerInvariant();
        if (!IssueTypeCodes.All.Contains(normalizedType))
        {
            normalizedType = IssueTypeCodes.Other;
        }

        var normalizedOrg = NormalizeOrganizationId(organizationId);
        var hasOrgFilter = normalizedOrg != null;
        var orgValue = normalizedOrg ?? string.Empty;

        var templates = await issueTemplateRepository.GetListAsync(x =>
            x.Status == EnableStatus.Enabled
            && x.IssueType == normalizedType
            && (!hasOrgFilter
                || x.OrganizationId == orgValue
                || x.OrganizationId == null
                || x.OrganizationId == string.Empty));

        var template = templates.FirstOrDefault(x => x.OrganizationId == normalizedOrg)
            ?? templates.FirstOrDefault(x => string.IsNullOrWhiteSpace(x.OrganizationId))
            ?? templates.FirstOrDefault();

        var title = !string.IsNullOrWhiteSpace(titleOverride)
            ? titleOverride.Trim()
            : template?.Title?.Trim();
        var content = !string.IsNullOrWhiteSpace(contentOverride)
            ? contentOverride.Trim()
            : template?.Content?.Trim();

        if (string.IsNullOrWhiteSpace(title) || string.IsNullOrWhiteSpace(content))
        {
            return null;
        }

        return new ProblematicMarkRequest
        {
            IssueType = normalizedType,
            Title = title,
            Content = content,
            IssueTemplateId = template?.Id,
            NotifyMethod = template == null ? null : IssueNotifyMethodCodes.Normalize(template.NotifyMethod),
            Remark = remark
        };
    }

    private static string? NormalizeOrganizationId(string? organizationId)
    {
        var text = organizationId?.Trim();
        return string.IsNullOrWhiteSpace(text) ? null : text;
    }
}