using PowderCoating.Application.DTOs.Quote;
using PowderCoating.Application.Interfaces;
using PowderCoating.Core.Entities;

namespace PowderCoating.Application.Services;

public class JobItemAssemblyService : IJobItemAssemblyService
{
    public JobItem CreateJobItem(CreateQuoteItemDto source, int jobId, int companyId, QuoteItemPricingResult pricing, DateTime createdAtUtc)
    {
        ArgumentNullException.ThrowIfNull(source);
        ArgumentNullException.ThrowIfNull(pricing);

        return BuildJobItem(
            new JobItemSeed
            {
                Description = source.Description,
                Quantity = source.Quantity,
                SurfaceAreaSqFt = source.SurfaceAreaSqFt,
                CatalogItemId = source.CatalogItemId,
                IsGenericItem = source.IsGenericItem,
                IsLaborItem = source.IsLaborItem,
                IsSalesItem = source.IsSalesItem,
                IsAiItem = source.IsAiItem,
                Sku = source.Sku,
                ManualUnitPrice = source.ManualUnitPrice,
                PowderCostOverride = source.PowderCostOverride,
                UnitPrice = pricing.UnitPrice,
                TotalPrice = pricing.TotalPrice,
                LaborCost = pricing.LaborCost,
                RequiresSandblasting = source.RequiresSandblasting,
                RequiresMasking = source.RequiresMasking,
                EstimatedMinutes = source.EstimatedMinutes,
                Notes = source.Notes,
                IncludePrepCost = source.IncludePrepCost,
                Complexity = source.Complexity,
                AiTags = source.AiTags,
                AiPredictionId = source.AiPredictionId
            },
            jobId,
            companyId,
            createdAtUtc);
    }

    public IReadOnlyList<JobItemCoat> CreateJobItemCoats(CreateQuoteItemDto source, int jobItemId, int companyId, DateTime createdAtUtc)
    {
        ArgumentNullException.ThrowIfNull(source);

        return source.Coats?
            .OrderBy(c => c.Sequence)
            .Select(c => BuildJobItemCoat(
                new JobItemCoatSeed
                {
                    CoatName = c.CoatName,
                    Sequence = c.Sequence,
                    InventoryItemId = c.InventoryItemId,
                    ColorName = c.ColorName,
                    VendorId = c.VendorId,
                    ColorCode = c.ColorCode,
                    Finish = c.Finish,
                    CoverageSqFtPerLb = c.CoverageSqFtPerLb,
                    TransferEfficiency = c.TransferEfficiency,
                    PowderCostPerLb = c.PowderCostPerLb,
                    PowderToOrder = CalculatePowderToOrder(c.PowderToOrder, source.SurfaceAreaSqFt, source.Quantity, c.CoverageSqFtPerLb, c.TransferEfficiency),
                    Notes = c.Notes
                },
                jobItemId,
                companyId,
                createdAtUtc))
            .ToList() ?? [];
    }

    public IReadOnlyList<JobItemPrepService> CreateJobItemPrepServices(CreateQuoteItemDto source, int jobItemId, int companyId, DateTime createdAtUtc)
    {
        ArgumentNullException.ThrowIfNull(source);
        return BuildJobItemPrepServices(
            source.PrepServices?.Select(p => new JobItemPrepServiceSeed
            {
                PrepServiceId = p.PrepServiceId,
                EstimatedMinutes = p.EstimatedMinutes,
                BlastSetupId = p.BlastSetupId
            }),
            jobItemId,
            companyId,
            createdAtUtc);
    }

    public JobItem CreateJobItem(QuoteItem source, int jobId, int companyId, DateTime createdAtUtc)
    {
        ArgumentNullException.ThrowIfNull(source);

        var firstCoat = source.Coats?
            .OrderBy(c => c.Sequence)
            .FirstOrDefault();

        return BuildJobItem(
            new JobItemSeed
            {
                Description = source.Description,
                Quantity = source.Quantity,
                ColorName = firstCoat?.ColorName,
                ColorCode = firstCoat?.ColorCode,
                Finish = firstCoat?.Finish,
                SurfaceArea = source.SurfaceAreaSqFt,
                SurfaceAreaSqFt = source.SurfaceAreaSqFt,
                CatalogItemId = source.CatalogItemId,
                IsGenericItem = source.IsGenericItem,
                IsLaborItem = source.IsLaborItem,
                IsSalesItem = source.IsSalesItem,
                IsAiItem = source.IsAiItem,
                Sku = source.Sku,
                ManualUnitPrice = source.ManualUnitPrice,
                PowderCostOverride = source.PowderCostOverride,
                UnitPrice = source.UnitPrice,
                TotalPrice = source.TotalPrice,
                LaborCost = source.ItemLaborCost,
                RequiresSandblasting = source.RequiresSandblasting,
                RequiresMasking = source.RequiresMasking,
                EstimatedMinutes = source.EstimatedMinutes,
                Notes = source.Notes,
                IncludePrepCost = source.IncludePrepCost,
                Complexity = source.Complexity,
                AiTags = source.AiTags,
                AiPredictionId = source.AiPredictionId
            },
            jobId,
            companyId,
            createdAtUtc);
    }

    public IReadOnlyList<JobItemCoat> CreateJobItemCoats(QuoteItem source, int jobItemId, int companyId, DateTime createdAtUtc)
    {
        ArgumentNullException.ThrowIfNull(source);

        return source.Coats?
            .OrderBy(c => c.Sequence)
            .Select(c =>
            {
                var appearance = ResolveCoatAppearance(c.ColorName, c.ColorCode, c.Finish, c.InventoryItem);
                return BuildJobItemCoat(
                    new JobItemCoatSeed
                    {
                        CoatName = c.CoatName,
                        Sequence = c.Sequence,
                        InventoryItemId = c.InventoryItemId,
                        ColorName = appearance.ColorName,
                        VendorId = c.VendorId,
                        ColorCode = appearance.ColorCode,
                        Finish = appearance.Finish,
                        CoverageSqFtPerLb = c.CoverageSqFtPerLb,
                        TransferEfficiency = c.TransferEfficiency,
                        PowderCostPerLb = c.PowderCostPerLb,
                        PowderToOrder = CalculatePowderToOrder(c.PowderToOrder, source.SurfaceAreaSqFt, source.Quantity, c.CoverageSqFtPerLb, c.TransferEfficiency),
                        Notes = c.Notes
                    },
                    jobItemId,
                    companyId,
                    createdAtUtc);
            })
            .ToList() ?? [];
    }

    public IReadOnlyList<JobItemPrepService> CreateJobItemPrepServices(QuoteItem source, int jobItemId, int companyId, DateTime createdAtUtc)
    {
        ArgumentNullException.ThrowIfNull(source);
        return BuildJobItemPrepServices(
            source.PrepServices?.Select(p => new JobItemPrepServiceSeed
            {
                PrepServiceId = p.PrepServiceId,
                EstimatedMinutes = p.EstimatedMinutes,
                BlastSetupId = p.BlastSetupId
            }),
            jobItemId,
            companyId,
            createdAtUtc);
    }

    public JobItem CreateJobItem(JobItem source, int jobId, int companyId, DateTime createdAtUtc)
    {
        ArgumentNullException.ThrowIfNull(source);

        return BuildJobItem(
            new JobItemSeed
            {
                Description = source.Description,
                Quantity = source.Quantity,
                ColorName = source.ColorName,
                ColorCode = source.ColorCode,
                Finish = source.Finish,
                SurfaceArea = source.SurfaceArea,
                SurfaceAreaSqFt = source.SurfaceAreaSqFt,
                CatalogItemId = source.CatalogItemId,
                IsGenericItem = source.IsGenericItem,
                IsLaborItem = source.IsLaborItem,
                IsSalesItem = source.IsSalesItem,
                IsAiItem = source.IsAiItem,
                Sku = source.Sku,
                ManualUnitPrice = source.ManualUnitPrice,
                PowderCostOverride = source.PowderCostOverride,
                UnitPrice = source.UnitPrice,
                TotalPrice = source.TotalPrice,
                LaborCost = source.LaborCost,
                RequiresSandblasting = source.RequiresSandblasting,
                RequiresMasking = source.RequiresMasking,
                EstimatedMinutes = source.EstimatedMinutes,
                Notes = source.Notes,
                IncludePrepCost = source.IncludePrepCost,
                Complexity = source.Complexity,
                AiTags = source.AiTags,
                AiPredictionId = source.AiPredictionId
            },
            jobId,
            companyId,
            createdAtUtc);
    }

    public IReadOnlyList<JobItemCoat> CreateJobItemCoats(JobItem source, int jobItemId, int companyId, DateTime createdAtUtc)
    {
        ArgumentNullException.ThrowIfNull(source);

        return source.Coats?
            .OrderBy(c => c.Sequence)
            .Select(c => BuildJobItemCoat(
                new JobItemCoatSeed
                {
                    CoatName = c.CoatName,
                    Sequence = c.Sequence,
                    InventoryItemId = c.InventoryItemId,
                    ColorName = c.ColorName,
                    VendorId = c.VendorId,
                    ColorCode = c.ColorCode,
                    Finish = c.Finish,
                    CoverageSqFtPerLb = c.CoverageSqFtPerLb,
                    TransferEfficiency = c.TransferEfficiency,
                    PowderCostPerLb = c.PowderCostPerLb,
                    PowderToOrder = c.PowderToOrder,
                    Notes = c.Notes
                },
                jobItemId,
                companyId,
                createdAtUtc))
            .ToList() ?? [];
    }

    public IReadOnlyList<JobItemPrepService> CreateJobItemPrepServices(JobItem source, int jobItemId, int companyId, DateTime createdAtUtc)
    {
        ArgumentNullException.ThrowIfNull(source);
        return BuildJobItemPrepServices(
            source.PrepServices?.Select(p => new JobItemPrepServiceSeed
            {
                PrepServiceId = p.PrepServiceId,
                EstimatedMinutes = p.EstimatedMinutes,
                BlastSetupId = p.BlastSetupId
            }),
            jobItemId,
            companyId,
            createdAtUtc);
    }

    private static JobItem BuildJobItem(JobItemSeed seed, int jobId, int companyId, DateTime createdAtUtc)
    {
        return new JobItem
        {
            JobId = jobId,
            Description = seed.Description,
            Quantity = seed.Quantity,
            ColorName = seed.ColorName,
            ColorCode = seed.ColorCode,
            Finish = seed.Finish,
            SurfaceArea = seed.SurfaceArea,
            SurfaceAreaSqFt = seed.SurfaceAreaSqFt,
            CatalogItemId = seed.CatalogItemId,
            IsGenericItem = seed.IsGenericItem,
            IsLaborItem = seed.IsLaborItem,
            IsSalesItem = seed.IsSalesItem,
            IsAiItem = seed.IsAiItem,
            Sku = seed.Sku,
            ManualUnitPrice = seed.ManualUnitPrice,
            PowderCostOverride = seed.PowderCostOverride,
            UnitPrice = seed.UnitPrice,
            TotalPrice = seed.TotalPrice,
            LaborCost = seed.LaborCost,
            RequiresSandblasting = seed.RequiresSandblasting,
            RequiresMasking = seed.RequiresMasking,
            EstimatedMinutes = seed.EstimatedMinutes,
            Notes = seed.Notes,
            IncludePrepCost = seed.IncludePrepCost,
            Complexity = seed.Complexity,
            AiTags = seed.AiTags,
            AiPredictionId = seed.AiPredictionId,
            CompanyId = companyId,
            CreatedAt = createdAtUtc
        };
    }

    private static JobItemCoat BuildJobItemCoat(JobItemCoatSeed seed, int jobItemId, int companyId, DateTime createdAtUtc)
    {
        return new JobItemCoat
        {
            JobItemId = jobItemId,
            CoatName = seed.CoatName,
            Sequence = seed.Sequence,
            InventoryItemId = seed.InventoryItemId,
            ColorName = seed.ColorName,
            VendorId = seed.VendorId,
            ColorCode = seed.ColorCode,
            Finish = seed.Finish,
            CoverageSqFtPerLb = seed.CoverageSqFtPerLb,
            TransferEfficiency = seed.TransferEfficiency,
            PowderCostPerLb = seed.PowderCostPerLb,
            PowderToOrder = seed.PowderToOrder,
            Notes = seed.Notes,
            CompanyId = companyId,
            CreatedAt = createdAtUtc
        };
    }

    private static IReadOnlyList<JobItemPrepService> BuildJobItemPrepServices(IEnumerable<JobItemPrepServiceSeed>? seeds, int jobItemId, int companyId, DateTime createdAtUtc)
    {
        return seeds?
            .Select(seed => new JobItemPrepService
            {
                JobItemId = jobItemId,
                PrepServiceId = seed.PrepServiceId,
                EstimatedMinutes = seed.EstimatedMinutes,
                BlastSetupId = seed.BlastSetupId,
                CompanyId = companyId,
                CreatedAt = createdAtUtc
            })
            .ToList() ?? [];
    }

    private static decimal? CalculatePowderToOrder(decimal? storedPowderToOrder, decimal surfaceAreaSqFt, decimal quantity, decimal coverageSqFtPerLb, decimal transferEfficiency)
    {
        if (storedPowderToOrder.HasValue && storedPowderToOrder.Value > 0)
            return storedPowderToOrder;

        if (surfaceAreaSqFt <= 0)
            return null;

        var coverage = coverageSqFtPerLb > 0 ? coverageSqFtPerLb : 30m;
        var efficiency = transferEfficiency > 0 ? transferEfficiency / 100m : 0.65m;
        return Math.Round((surfaceAreaSqFt * quantity) / (coverage * efficiency), 2);
    }

    private static (string? ColorName, string? ColorCode, string? Finish) ResolveCoatAppearance(
        string? colorName,
        string? colorCode,
        string? finish,
        InventoryItem? inventoryItem)
    {
        if (inventoryItem == null)
            return (colorName, colorCode, finish);

        return (inventoryItem.Name, inventoryItem.ColorCode, inventoryItem.Finish);
    }

    private sealed class JobItemSeed
    {
        public string Description { get; init; } = string.Empty;
        public decimal Quantity { get; init; }
        public string? ColorName { get; init; }
        public string? ColorCode { get; init; }
        public string? Finish { get; init; }
        public decimal? SurfaceArea { get; init; }
        public decimal SurfaceAreaSqFt { get; init; }
        public int? CatalogItemId { get; init; }
        public bool IsGenericItem { get; init; }
        public bool IsLaborItem { get; init; }
        public bool IsSalesItem { get; init; }
        public bool IsAiItem { get; init; }
        public string? Sku { get; init; }
        public decimal? ManualUnitPrice { get; init; }
        public decimal? PowderCostOverride { get; init; }
        public decimal UnitPrice { get; init; }
        public decimal TotalPrice { get; init; }
        public decimal LaborCost { get; init; }
        public bool RequiresSandblasting { get; init; }
        public bool RequiresMasking { get; init; }
        public int EstimatedMinutes { get; init; }
        public string? Notes { get; init; }
        public bool IncludePrepCost { get; init; }
        public string? Complexity { get; init; }
        public string? AiTags { get; init; }
        public int? AiPredictionId { get; init; }
    }

    private sealed class JobItemCoatSeed
    {
        public string CoatName { get; init; } = string.Empty;
        public int Sequence { get; init; }
        public int? InventoryItemId { get; init; }
        public string? ColorName { get; init; }
        public int? VendorId { get; init; }
        public string? ColorCode { get; init; }
        public string? Finish { get; init; }
        public decimal CoverageSqFtPerLb { get; init; }
        public decimal TransferEfficiency { get; init; }
        public decimal? PowderCostPerLb { get; init; }
        public decimal? PowderToOrder { get; init; }
        public string? Notes { get; init; }
    }

    private sealed class JobItemPrepServiceSeed
    {
        public int PrepServiceId { get; init; }
        public int EstimatedMinutes { get; init; }
        public int? BlastSetupId { get; init; }
    }
}