using Elwig.Models.Dtos;
using iText.Kernel.Colors;
using iText.Kernel.Pdf;
using iText.Layout.Borders;
using iText.Layout.Element;
using iText.Layout.Properties;
using System;
using System.Collections.Generic;
using System.Linq;

namespace Elwig.Documents {
    public class MemberList : Document {

        public new static string Name => "Mitgliederliste";

        public string Filter;
        public List<MemberListRow> Members;

        public string[] AreaComFilters;
        public bool FilterAreaComs => AreaComFilters.Length > 0;

        public MemberList(string filter, IEnumerable<MemberListRow> members) :
            base(Name) {
            Filter = filter;
            Members = [.. members];
            AreaComFilters = [..members
                .SelectMany(m => m.AreaCommitmentsFiltered)
                .Select(c => c.VtrgId)
                .Distinct()
                .Order()];
        }

        public MemberList(string filter, MemberListData data) :
            this(filter, data.Rows) {
        }

        protected override void RenderBody(iText.Layout.Document doc, PdfDocument pdf) {
            base.RenderBody(doc, pdf);
            doc.Add(new KernedParagraph(Name, 24)
                .SetTextAlignment(TextAlignment.CENTER).SetFont(BF)
                .SetMarginsMM(0, 0, 2, 0));
            doc.Add(new KernedParagraph(Filter, 14)
                .SetTextAlignment(TextAlignment.CENTER).SetFont(BF)
                .SetMarginsMM(0, 0, 2, 0));
            doc.Add(NewMemberTable(Members));
        }

        protected Table NewMemberTable(List<MemberListRow> members) {
            var tbl = new Table(AreaComFilters.Length > 1 ? ColsMM(8, 38, 36, 8, 18, 12, 5, 16, 12, 12) : ColsMM(8, 42, 40, 8, 20, 12, 5, 18, 12), true)
                .SetWidth(UnitValue.CreatePercentValue(100)).SetFixedLayout()
                .SetBorderCollapse(BorderCollapsePropertyValue.COLLAPSE);

            var headerSpan = FilterAreaComs ? 3 : 2;
            tbl.AddHeaderCell(NewTh("Nr.", rowspan: headerSpan))
                .AddHeaderCell(NewTh("Name", rowspan: headerSpan, left: true))
                .AddHeaderCell(NewTh("Adresse", rowspan: headerSpan, left: true))
                .AddHeaderCell(NewTh("PLZ", rowspan: headerSpan))
                .AddHeaderCell(NewTh("Ort", rowspan: headerSpan, left: true))
                .AddHeaderCell(NewTh("Betr.-Nr.", rowspan: headerSpan))
                .AddHeaderCell(NewTh("GA", rowspan: headerSpan).SetPaddingLeft(0).SetPaddingRight(0))
                .AddHeaderCell(NewTh("Stamm-KG", rowspan: headerSpan, left: true))
                .AddHeaderCell(NewTh("Geb. Fl.", colspan: FilterAreaComs ? AreaComFilters.Length : 1));
            if (FilterAreaComs) {
                foreach (var vtrgId in AreaComFilters) {
                    tbl.AddHeaderCell(NewTh(vtrgId));
                }
            }
            for (int i = 0; i < (FilterAreaComs ? AreaComFilters.Length : 1); i++) {
                tbl.AddHeaderCell(NewTh("[m²]"));
            }

            string? lastBranch = members.Select(m => m.Branch).Distinct().Count() == 1 ? null : "";
            foreach (var m in members) {
                if (lastBranch != null && m.Branch != lastBranch) {
                    tbl.AddCell(NewCell(colspan: 8 + Math.Max(AreaComFilters.Length, 1)).SetHeightMM(5).SetKeepWithNext(true));
                    tbl.AddCell(NewCell(new KernedParagraph(m.Branch ?? "", 16).SetFont(BF), colspan: 8 + Math.Max(AreaComFilters.Length, 1))
                        .SetPaddingsMM(1, 2, 1, 2)
                        .SetBorder(new SolidBorder(BorderThickness))
                        .SetBackgroundColor(new DeviceRgb(0xe0, 0xe0, 0xe0)));
                    lastBranch = m.Branch;
                }

                tbl.AddCell(NewTd($"{m.MgNr}", 8, rowspan: m.BillingName != null ? 2 : 1, right: true).SetVerticalAlignment(VerticalAlignment.TOP))
                    .AddCell(NewTd($"{m.AdminName1} {m.Name2}", 8))
                    .AddCell(NewTd(m.Address, 8))
                    .AddCell(NewTd($"{m.Plz}", 8))
                    .AddCell(NewTd(m.Locality, 6))
                    .AddCell(NewTd(m.LfbisNr ?? "", 8))
                    .AddCell(NewTd($"{m.BusinessShares:N0}", 8, right: true).SetPaddingLeft(0).SetPaddingRight(0))
                    .AddCell(NewTd(m.DefaultKg ?? "", 6));
                if (AreaComFilters.Length > 0) {
                    foreach (var v in AreaComFilters) {
                        tbl.AddCell(NewTd($"{m.AreaCommitmentsFiltered.FirstOrDefault(c => c.VtrgId == v).Area:N0}", 8, right: true));
                    }
                } else {
                    tbl.AddCell(NewTd($"{m.AreaCommitment:N0}", 8, right: true));
                }

                if (m.BillingName != null) {
                    tbl.AddCell(NewTd(m.BillingName, 8))
                        .AddCell(NewTd(m.BillingAddress ?? "", 8))
                        .AddCell(NewTd($"{m.BillingPlz}", 8))
                        .AddCell(NewTd(m.BillingLocality ?? "", 6))
                        .AddCell(NewTd(colspan: 3 + Math.Max(AreaComFilters.Length, 1)));
                }
            }

            return tbl;
        }
    }
}