using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using PowderCoating.Application.DTOs.Company;
using PowderCoating.Application.Interfaces;
using PowderCoating.Core.Interfaces;
using QuestPDF.Fluent;
using QuestPDF.Helpers;
using QuestPDF.Infrastructure;

namespace PowderCoating.Web.Controllers;

[Authorize]
public class WorkOrderController : Controller
{
    private readonly IUnitOfWork _unitOfWork;
    private readonly ITenantContext _tenantContext;
    private readonly ICompanyLogoService _logoService;

    public WorkOrderController(IUnitOfWork unitOfWork, ITenantContext tenantContext, ICompanyLogoService logoService)
    {
        _unitOfWork = unitOfWork;
        _tenantContext = tenantContext;
        _logoService = logoService;
    }

    /// <summary>
    /// Streams a blank work order PDF. Uses the company logo from file storage,
    /// accent color, and terms from CompanyPreferences.WoTerms.
    /// </summary>
    [HttpGet]
    public async Task<IActionResult> Blank()
    {
        var companyId = _tenantContext.GetCurrentCompanyId();
        if (companyId == null) return Forbid();

        var company = await _unitOfWork.Companies.GetByIdAsync(companyId.Value);
        var prefs = await _unitOfWork.CompanyPreferences.FirstOrDefaultAsync(
            p => p.CompanyId == companyId.Value && !p.IsDeleted);

        // Try file-system logo first, then fall back to legacy DB bytes
        byte[]? logoBytes = null;
        if (!string.IsNullOrWhiteSpace(company?.LogoFilePath))
        {
            var (ok, content, _, _) = await _logoService.GetCompanyLogoAsync(company.LogoFilePath);
            if (ok) logoBytes = content;
        }
        if (logoBytes == null || logoBytes.Length == 0)
            logoBytes = company?.LogoData;

        var companyInfo = new CompanyInfoDto
        {
            CompanyName = company?.CompanyName ?? string.Empty,
            Phone      = company?.Phone,
            Address    = company?.Address,
            City       = company?.City,
            State      = company?.State,
            ZipCode    = company?.ZipCode,
        };

        var pdfBytes = GenerateBlankWorkOrderPdf(logoBytes, companyInfo, prefs?.WoAccentColor, prefs?.WoTerms);
        Response.Headers["Content-Disposition"] = "inline; filename=\"Blank-Work-Order.pdf\"";
        return File(pdfBytes, "application/pdf");
    }

    private static byte[] GenerateBlankWorkOrderPdf(
        byte[]? logoData,
        CompanyInfoDto companyInfo,
        string? accentHex,
        string? terms)
    {
        QuestPDF.Settings.License = LicenseType.Community;

        var accent   = ResolveColor(accentHex, Colors.Grey.Darken3);
        const string altRow = "#F5F5F5";

        var document = Document.Create(container =>
        {
            container.Page(page =>
            {
                page.Size(PageSizes.Letter);
                page.MarginHorizontal(0.6f, Unit.Inch);
                page.MarginTop(0.5f, Unit.Inch);
                page.MarginBottom(0.4f, Unit.Inch);
                page.PageColor(Colors.White);
                page.DefaultTextStyle(x => x.FontSize(8.5f).FontFamily("Arial"));

                page.Content().Column(col =>
                {
                    // ── HEADER: logo left, company info + drop-off date right ─
                    col.Item().Row(row =>
                    {
                        if (logoData != null && logoData.Length > 0)
                            row.ConstantItem(100).PaddingRight(10).Image(logoData).FitArea();

                        row.RelativeItem().AlignRight().Column(c =>
                        {
                            c.Item().Text(companyInfo.CompanyName)
                                .FontSize(18).Bold().FontColor(accent);

                            var parts = new[]
                            {
                                companyInfo.Address,
                                string.Join(", ", new[] { companyInfo.City, companyInfo.State }
                                    .Where(s => !string.IsNullOrWhiteSpace(s))),
                                companyInfo.ZipCode,
                                companyInfo.Phone
                            }.Where(s => !string.IsNullOrWhiteSpace(s));

                            foreach (var p in parts)
                                c.Item().Text(p!).FontSize(9).FontColor(Colors.Grey.Darken1);
                        });
                    });

                    // ── TITLE ROW: "WORK ORDER" left, Drop Off Date field right ─
                    col.Item().PaddingTop(8).Row(row =>
                    {
                        row.RelativeItem().AlignBottom()
                            .Text("WORK ORDER")
                            .FontSize(24).FontColor(Colors.Grey.Lighten1).Bold();

                        row.ConstantItem(180).AlignBottom().Column(c =>
                        {
                            c.Item().Text("DROP OFF DATE")
                                .FontSize(7.5f).Bold().FontColor(accent);
                            c.Item().PaddingTop(2)
                                .LineHorizontal(1).LineColor(Colors.Grey.Darken1);
                        });
                    });

                    col.Item().PaddingTop(4).LineHorizontal(1).LineColor(Colors.Grey.Lighten2);
                    col.Item().Height(6);

                    // ── CLIENT INFO (no Drop Off Date column) ────────────────
                    col.Item().Table(table =>
                    {
                        table.ColumnsDefinition(c => c.RelativeColumn());

                        void HeaderCell(uint r, string label)
                            => table.Cell().Row(r).Column(1)
                                   .Background(accent).Padding(4)
                                   .Text(label).FontSize(7.5f).Bold().FontColor(Colors.White);

                        void DataCell(uint r)
                            => table.Cell().Row(r).Column(1)
                                   .Border(0.5f).BorderColor(Colors.Grey.Lighten2)
                                   .MinHeight(18).Padding(3).Text("");

                        HeaderCell(1, "CLIENT NAME");
                        DataCell(2);
                        HeaderCell(3, "CLIENT PHONE");
                        DataCell(4);
                        HeaderCell(5, "DUE DATE (if applicable)");
                        DataCell(6);
                    });

                    col.Item().Height(8);

                    // ── ITEMS TABLE ──────────────────────────────────────────
                    col.Item().Table(table =>
                    {
                        table.ColumnsDefinition(c =>
                        {
                            c.RelativeColumn(6);
                            c.RelativeColumn(2);
                            c.RelativeColumn(1.5f);
                        });

                        // Header
                        foreach (var (label, align) in new[] { ("PART DESCRIPTION", "left"), ("COLOR", "center"), ("QUOTE", "center") })
                        {
                            var cell = table.Cell().Background(accent).Padding(5);
                            var txt  = cell.Text(label).FontSize(7.5f).Bold().FontColor(Colors.White);
                            if (align == "center") txt.AlignCenter();
                        }

                        // 12 data rows — tight height to fit page
                        for (int i = 0; i < 12; i++)
                        {
                            string bg = i % 2 == 1 ? altRow : Colors.White;
                            for (int c = 0; c < 3; c++)
                                table.Cell().Background(bg)
                                    .Border(0.5f).BorderColor(Colors.Grey.Lighten2)
                                    .MinHeight(16).Padding(3).Text("");
                        }

                        // Dark footer bar
                        table.Cell().ColumnSpan(3).Background(accent).MinHeight(6).Text("");
                    });

                    col.Item().Height(8);

                    // ── NOTES ────────────────────────────────────────────────
                    col.Item().Table(table =>
                    {
                        table.ColumnsDefinition(c => c.RelativeColumn());
                        table.Cell().Background(accent).Padding(5)
                            .Text("NOTES").FontSize(7.5f).Bold().FontColor(Colors.White);
                        table.Cell().Border(0.5f).BorderColor(Colors.Grey.Lighten2)
                            .MinHeight(65).Padding(3).Text("");
                    });

                    col.Item().Height(8);

                    // ── TERMS ────────────────────────────────────────────────
                    if (!string.IsNullOrWhiteSpace(terms))
                    {
                        col.Item().PaddingBottom(8)
                            .Text(terms).FontSize(7.5f).Italic();
                    }

                    // ── SIGNATURE LINE ───────────────────────────────────────
                    col.Item().Row(row =>
                    {
                        row.RelativeItem(3).Column(c =>
                        {
                            c.Item().Text("Customer Signature:").FontSize(8.5f);
                            c.Item().PaddingTop(2).LineHorizontal(1).LineColor(Colors.Grey.Darken1);
                        });
                        row.ConstantItem(20);
                        row.RelativeItem(1).Column(c =>
                        {
                            c.Item().Text("Date:").FontSize(8.5f);
                            c.Item().PaddingTop(2).LineHorizontal(1).LineColor(Colors.Grey.Darken1);
                        });
                    });
                });
            });
        });

        return document.GeneratePdf();
    }

    private static string ResolveColor(string? hex, string fallback)
    {
        if (string.IsNullOrWhiteSpace(hex)) return fallback;
        try { _ = System.Drawing.ColorTranslator.FromHtml(hex); return hex; }
        catch { return fallback; }
    }
}