using Microsoft.AspNetCore.Mvc;
using PlanTempus.Application.Features.Localization.Services;

namespace PlanTempus.Application.Features.Customers.Components;

public class CustomerDetailEconomyViewComponent : ViewComponent
{
    private readonly ILocalizationService _localization;

    public CustomerDetailEconomyViewComponent(ILocalizationService localization)
    {
        _localization = localization;
    }

    public IViewComponentResult Invoke(string customerId)
    {
        var customer = CustomerDetailCatalog.Get(customerId);
        var economy = customer.Economy;

        var model = new CustomerDetailEconomyViewModel
        {
            HasData = economy != null,

            // Stat cards
            CurrentYearValue = economy != null ? $"{economy.CurrentYear.Total:N0} kr".Replace(",", ".") : "-",
            CurrentYearLabel = string.Format(_localization.Get("customers.detail.economy.thisYear"), economy?.CurrentYear.Year ?? DateTime.Now.Year),
            LastYearValue = economy != null ? $"{economy.LastYear.Total:N0} kr".Replace(",", ".") : "-",
            LastYearLabel = _localization.Get("customers.detail.economy.lastYear"),
            AvgPerVisitValue = economy != null ? $"{economy.AvgPerVisit:N0} kr".Replace(",", ".") : "-",
            AvgPerVisitLabel = _localization.Get("customers.detail.economy.avgPerVisit"),
            AvgPerMonthValue = economy != null ? $"{economy.AvgPerMonth:N0} kr".Replace(",", ".") : "-",
            AvgPerMonthLabel = _localization.Get("customers.detail.economy.avgPerMonth"),

            // Chart card
            RevenueOverTimeTitle = _localization.Get("customers.detail.economy.revenueOverTime"),
            ServicesLabel = _localization.Get("customers.detail.economy.services"),
            ProductsLabel = _localization.Get("customers.detail.economy.products"),
            ChartData = economy?.ChartData != null ? new CustomerChartDataViewModel
            {
                Categories = economy.ChartData.Categories,
                Series = economy.ChartData.Series.Select(s => new CustomerChartSeriesViewModel
                {
                    Name = s.Name,
                    Color = s.Color,
                    Data = s.Data.Select(d => new CustomerChartDataPointViewModel
                    {
                        X = d.X,
                        Y = d.Y
                    }).ToList()
                }).ToList()
            } : null,

            // Purchase history
            PurchaseHistoryTitle = _localization.Get("customers.detail.economy.purchaseHistory"),
            Purchases = economy?.Purchases.Take(5).Select(p => new CustomerPurchaseViewModel
            {
                Invoice = p.Invoice,
                Date = FormatDate(p.Date),
                Time = p.Time,
                Employee = p.Employee,
                Services = p.Services,
                Type = p.Type,
                TypeLabel = p.Type == "service"
                    ? _localization.Get("customers.detail.economy.services")
                    : _localization.Get("customers.detail.economy.products"),
                Amount = $"{p.Amount:N0} kr".Replace(",", ".")
            }).ToList() ?? new List<CustomerPurchaseViewModel>(),
            SeeAllText = _localization.Get("customers.detail.economy.seeAll"),

            // Empty state
            EmptyStateText = _localization.Get("customers.detail.economy.noData")
        };

        return View(model);
    }

    private static string FormatDate(string dateStr)
    {
        if (DateTime.TryParse(dateStr, out var date))
        {
            return date.ToString("d. MMM yyyy", new System.Globalization.CultureInfo("da-DK"));
        }
        return dateStr;
    }
}

public class CustomerDetailEconomyViewModel
{
    public bool HasData { get; init; }

    // Stat cards
    public required string CurrentYearValue { get; init; }
    public required string CurrentYearLabel { get; init; }
    public required string LastYearValue { get; init; }
    public required string LastYearLabel { get; init; }
    public required string AvgPerVisitValue { get; init; }
    public required string AvgPerVisitLabel { get; init; }
    public required string AvgPerMonthValue { get; init; }
    public required string AvgPerMonthLabel { get; init; }

    // Chart card
    public required string RevenueOverTimeTitle { get; init; }
    public required string ServicesLabel { get; init; }
    public required string ProductsLabel { get; init; }
    public CustomerChartDataViewModel? ChartData { get; init; }

    // Purchase history
    public required string PurchaseHistoryTitle { get; init; }
    public List<CustomerPurchaseViewModel> Purchases { get; init; } = new();
    public required string SeeAllText { get; init; }

    // Empty state
    public required string EmptyStateText { get; init; }
}

public class CustomerPurchaseViewModel
{
    public required string Invoice { get; init; }
    public required string Date { get; init; }
    public required string Time { get; init; }
    public required string Employee { get; init; }
    public required string Services { get; init; }
    public required string Type { get; init; }
    public required string TypeLabel { get; init; }
    public required string Amount { get; init; }
}

public class CustomerChartDataViewModel
{
    public List<string> Categories { get; init; } = new();
    public List<CustomerChartSeriesViewModel> Series { get; init; } = new();
}

public class CustomerChartSeriesViewModel
{
    public required string Name { get; init; }
    public required string Color { get; init; }
    public List<CustomerChartDataPointViewModel> Data { get; init; } = new();
}

public class CustomerChartDataPointViewModel
{
    public required string X { get; init; }
    public decimal Y { get; init; }
}