using System;
using System.Linq;
using NUnit.Framework;
using QuestPDF.Examples.Engine;
using QuestPDF.Fluent;
using QuestPDF.Helpers;
using QuestPDF.Infrastructure;
using SkiaSharp;

namespace QuestPDF.Examples
{
    [TestFixture]
    public class ElementExamples
    {
        [Test]
        public void Placeholder()
        {
            RenderingTest
                .Create()
                .PageSize(200, 150)
                .Render(container =>
                {
                    container
                        .Background("#FFF")
                        .Padding(25)
                        .Placeholder();
                });
        }
        
        [Test]
        public void Decoration()
        {
            RenderingTest
                .Create()
                .PageSize(300, 300)
                .Render(container =>
                {
                    container
                        .Background("#FFF")
                        .Padding(25)
                        .Decoration(decoration =>
                        {
                            decoration
                                .Header()
                                .Background(Colors.Grey.Medium)
                                .Padding(10)
                                .Text("Notes", TextStyle.Default.Size(16).Color("#FFF"));
                    
                            decoration
                                .Content()
                                .Background(Colors.Grey.Lighten3)
                                .Padding(10)
                                .ExtendVertical()
                                .Text(Helpers.Placeholders.LoremIpsum());
                        });
                });
        }
        
        // [Test]
        // public void Page()
        // {
        //     RenderingTest
        //         .Create()
        //         .PageSize(298, 421)
        //         .Render(container =>
        //         {
        //             container
        //                 .Background("#FFF")
        //                 .Padding(15)
        //                 .Page(page =>
        //                 {
        //                     page.Header()
        //                         .Height(60)
        //                         .Background(Colors.Grey.Lighten1)
        //                         .AlignCenter()
        //                         .AlignMiddle()
        //                         .Text("Header");
        //             
        //                     page.Content()
        //                         .Background(Colors.Grey.Lighten2)
        //                         .AlignCenter()
        //                         .AlignMiddle()
        //                         .Text("Content");
        //                 
        //                     page.Footer()
        //                         .Height(30)
        //                         .Background(Colors.Grey.Lighten1)
        //                         .AlignCenter()
        //                         .AlignMiddle()
        //                         .Text("Footer");
        //                 });
        //         });
        // }
        
        [Test]
        public void Row()
        {
            RenderingTest
                .Create()
                .PageSize(740, 200)
                .Render(container =>
                {
                    container
                        .Background("#FFF")
                        .Padding(20)
                        .Stack(stack =>
                        {
                            stack.Item()
                                .PaddingBottom(10)
                                .AlignCenter()
                                .Text("This Row element is 700pt wide");

                            stack.Item().Row(row =>
                            {
                                row.ConstantColumn(100)
                                    .Background(Colors.Grey.Lighten1)
                                    .Padding(10)
                                    .ExtendVertical()
                                    .Text("This column is 100 pt wide");

                                row.RelativeColumn()
                                    .Background(Colors.Grey.Lighten2)
                                    .Padding(10)
                                    .Text("This column takes 1/3 of the available space (200pt)");

                                row.RelativeColumn(2)
                                    .Background(Colors.Grey.Lighten3)
                                    .Padding(10)
                                    .Text("This column takes 2/3 of the available space (400pt)");
                            });
                        });
                });
        }
        
        [Test]
        public void RowSpacing()
        {
            RenderingTest
                .Create()
                .PageSize(740, 200)
                .Render(container =>
                {
                    container
                        .Background("#FFF")
                        .Padding(20)
                        .Row(row =>
                        {
                            row.Spacing(20);
                            row.RelativeColumn(2).Border(1).Background(Colors.Grey.Lighten1);
                            row.RelativeColumn(3).Border(1).Background(Colors.Grey.Lighten2);
                            row.RelativeColumn(4).Border(1).Background(Colors.Grey.Lighten3);
                        });
                });
        }
    
        [Test]
        public void Stack()
        {
            RenderingTest
                .Create()
                .PageSize(500, 360)
                .Render(container =>
                {
                    container
                        .Background("#FFF")
                        .Padding(15)
                        .Stack(stack =>
                        {
                            stack.Spacing(15);
                    
                            stack.Item().Background(Colors.Grey.Medium).Height(50);
                            stack.Item().Background(Colors.Grey.Lighten1).Height(100);
                            stack.Item().Background(Colors.Grey.Lighten2).Height(150);
                        });
                });
        }
        
        [Test]
        public void Debug()
        {
            RenderingTest
                .Create()
                .PageSize(210, 210)
                .Render(container =>
                {
                    container
                        .Padding(25)
                        .Debug("Grid example", Colors.Blue.Medium)
                        .Grid(grid =>
                        {
                            grid.Columns(3);
                            grid.Spacing(5);

                            foreach (var _ in Enumerable.Range(0, 8))
                                grid.Item().Height(50).Placeholder();
                        });
                });
        }
        
        [Test]
        public void ElementEnd()
        {
            RenderingTest
                .Create()
                .PageSize(300, 200)
                .Render(container =>
                {
                    var text = "";
            
                    container
                        .Padding(10)
                        .Element(x =>
                        {
                            if (string.IsNullOrWhiteSpace(text))
                                x.Height(10).Width(50).Background("#DDD");
                            else
                                x.Text(text);
                        });
                });
        }
        
        [Test]
        public void GridExample()
        {
            RenderingTest
                .Create()
                .PageSize(400, 230)
                .Render(container =>
                {
                    var textStyle = TextStyle.Default.Size(14);
            
                    container
                        .Padding(15)
                        .AlignRight()
                        .Grid(grid =>
                        {
                            grid.VerticalSpacing(10);
                            grid.HorizontalSpacing(10);
                            grid.AlignCenter();
                            grid.Columns(10); // 12 by default

                            grid.Item(6).Background(Colors.Blue.Lighten1).Height(50);
                            grid.Item(4).Background(Colors.Blue.Lighten3).Height(50);
                    
                            grid.Item(2).Background(Colors.Teal.Lighten1).Height(70);
                            grid.Item(3).Background(Colors.Teal.Lighten2).Height(70);
                            grid.Item(5).Background(Colors.Teal.Lighten3).Height(70);
                    
                            grid.Item(2).Background(Colors.Green.Lighten1).Height(50);
                            grid.Item(2).Background(Colors.Green.Lighten2).Height(50);
                            grid.Item(2).Background(Colors.Green.Lighten3).Height(50);
                        });
                });
        }
        
        [Test]
        public void Canvas()
        {
            RenderingTest
                .Create()
                .PageSize(300, 200)
                .Render(container =>
                {
                    container
                        .Background("#FFF")
                        .Padding(25)
                        .Canvas((canvas, size) =>
                        {
                            using var paint = new SKPaint
                            {
                                Color = SKColors.Red,
                                StrokeWidth = 10,
                                IsStroke = true
                            };
                        
                            // move origin to the center of the available space
                            canvas.Translate(size.Width / 2, size.Height / 2);
                    
                            // draw a circle
                            canvas.DrawCircle(0, 0, 50, paint);
                        });
                });
        }
 
        [Test]
        public void LayersExample()
        {
            RenderingTest
                .Create()
                .PageSize(400, 250)
                .Render(container =>
                {
                    container
                        .Padding(25)
                        .Layers(layers =>
                        {
                            // layer below main content
                            layers
                                .Layer()
                                .Height(100)
                                .Width(100)
                                .Background(Colors.Grey.Lighten3);

                            layers
                                .PrimaryLayer()
                                .Padding(25)
                                .Stack(stack =>
                                {
                                    stack.Spacing(5);
                            
                                    foreach (var _ in Enumerable.Range(0, 7))
                                        stack.Item().Text(Placeholders.Sentence());
                                });
                        
                            // layer above the main content    
                            layers
                                .Layer()
                                .AlignCenter()
                                .AlignMiddle()
                                .Text("Watermark", TextStyle.Default.Size(48).Bold().Color(Colors.Green.Lighten3));

                            layers
                                .Layer()
                                .AlignBottom()
                                .PageNumber("Page {pdf:currentPage}", TextStyle.Default.Size(16).Color(Colors.Green.Medium));
                        });
                });
        }

        // [Test]
        // public void EnsureSpace()
        // {
        //     RenderingTest
        //         .Create()
        //         .PageSize(300, 400)
        //         .Render(container =>
        //         {
        //             container
        //                 .Padding(50)
        //                 .Page(page =>
        //                 {
        //                     page.Header().PageNumber("Page {pdf:currentPage}");
        //             
        //                     page.Content().Height(300).Stack(content =>
        //                     {
        //                         content.Item().Height(200).Background(Colors.Grey.Lighten2);
        //                 
        //                         content.Item().EnsureSpace(100).Stack(stack =>
        //                         {
        //                             stack.Spacing(10);
        //                     
        //                             foreach (var _ in Enumerable.Range(0, 4))
        //                                 stack.Item().Height(50).Background(Colors.Green.Lighten1);
        //                         }); 
        //                     });
        //                 });
        //         });
        // }

        [Test]
        public void RandomColorMatrix()
        {
            RenderingTest
                .Create()
                .PageSize(300, 300)
                .Render(container =>
                {
                    container
                        .Padding(25)
                        .Grid(grid =>
                        {
                            grid.Columns(5);
                    
                            Enumerable
                                .Range(0, 25)
                                .Select(x => Placeholders.BackgroundColor())
                                .ToList()
                                .ForEach(x => grid.Item().Height(50).Background(x));
                        });
                });
        }
    
        [Test]
        public void DefinedColors()
        {
            var colors = new[]
            {
                Colors.Green.Darken4,
                Colors.Green.Darken3,
                Colors.Green.Darken2,
                Colors.Green.Darken1,
                
                Colors.Green.Medium,
                
                Colors.Green.Lighten1,
                Colors.Green.Lighten2,
                Colors.Green.Lighten3,
                Colors.Green.Lighten4,
                Colors.Green.Lighten5,
                
                Colors.Green.Accent1,
                Colors.Green.Accent2,
                Colors.Green.Accent3,
                Colors.Green.Accent4,
            };
            
            RenderingTest
                .Create()
                .PageSize(450, 150)
                .Render(container =>
                {
                    container
                        .Padding(25)
                        .Height(100)
                        .Row(row =>
                        {
                            foreach (var color in colors)
                                row.RelativeColumn().Background(color);
                        });
                });
        }

        [Test]
        public void DefinedFonts()
        {
            var fonts = new[]
            {
                Fonts.Calibri,
                Fonts.Candara,
                Fonts.Arial,
                Fonts.TimesNewRoman,
                Fonts.Consolas,
                Fonts.Tahoma,
                Fonts.Impact,
                Fonts.Trebuchet,
                Fonts.ComicSans
            };
            
            RenderingTest
                .Create()
                .PageSize(500, 175)
                .Render(container =>
                {
                    container
                        .Padding(25)
                        .Grid(grid =>
                        {
                            grid.Columns(3);

                            foreach (var font in fonts)
                            {
                                grid.Item()
                                    .Border(1)
                                    .BorderColor(Colors.Grey.Medium)
                                    .Padding(10)
                                    .Text(font, TextStyle.Default.FontType(font).Size(16));
                            }
                        });
                });
        }

        [Test]
        public void Layers()
        {
            RenderingTest
                .Create()
                .PageSize(300, 300)
                .Render(container =>
                {
                    container
                        .Background("#FFF")
                        .Padding(25)
                        .Layers(layers =>
                        {
                            layers.Layer().Text("Something else");
                    
                            layers.PrimaryLayer().Stack(stack =>
                            {
                                stack.Item().PaddingTop(20).Text("Text 1");
                                stack.Item().PaddingTop(40).Text("Text 2");
                            });
                    
                            layers.Layer().Canvas((canvas, size) =>
                            {
                                using var paint = new SKPaint
                                {
                                    Color = SKColors.Red,
                                    StrokeWidth = 5
                                };
                        
                                canvas.Translate(size.Width / 2, size.Height / 2);
                                canvas.DrawCircle(0, 0, 50, paint);
                            });
                    
                            layers.Layer().Background("#8F00").Extend();
                            layers.Layer().PaddingTop(40).Text("It works!", TextStyle.Default.Size(24));
                        });
                });
        }

        [Test]
        public void Box()
        {
            RenderingTest
                .Create()
                .PageSize(300, 150)
                .Render(container =>
                {
                    container
                        .Background("#FFF")
                        .Padding(15)
                        .Border(4)
                        .BorderColor(Colors.Blue.Medium)
                        //.Box()
                        .Background(Colors.Grey.Lighten2)
                        .Padding(15)
                        .Text("Test of the \n box element", TextStyle.Default.Size(20));
                });
        }

        [Test]
        public void Scale()
        {
            RenderingTest
                .Create()
                .PageSize(400, 400)
                .Render(container =>
                {
                    var style = TextStyle.Default.Size(20);
            
                    container
                        .Background("#FFF")
                        .Padding(25)
                        .Stack(stack =>
                        {
                            stack.Spacing(5);
                            stack.Item().Background(Placeholders.BackgroundColor()).Scale(0.5f).Text("Smaller text", style);
                            stack.Item().Background(Placeholders.BackgroundColor()).Text("Normal text", style);
                            stack.Item().Background(Placeholders.BackgroundColor()).Scale(2f).Text("Bigger text", style);
                            stack.Item().Background(Placeholders.BackgroundColor()).Scale(-1.5f).Text("Flipped text", style);
                        });
                });
        }

        [Test]
        public void Translate()
        {
            RenderingTest
                .Create()
                .PageSize(500, 300)
                .Render(container =>
                {
                    container
                        .Background("#FFF")
                        .Padding(25)
                        .Box()
                        .Background(Colors.Green.Lighten4)
                        .Padding(5)
                        .TranslateX(15)
                        .TranslateY(15)
                        .Text("Text outside of bounds");
                });
        }

        [Test]
        public void Rotate()
        {
            RenderingTest
                .Create()
                .PageSize(450, 450)
                .Render(container =>
                {
                    container
                        .Background("#FFF")
                        .Padding(20)
                        .Grid(grid =>
                        {
                            grid.Columns(2);
                            grid.Spacing(10);
                            
                            foreach (var turns in Enumerable.Range(0, 4))
                            {
                                grid.Item()
                                    .Width(200)
                                    .Height(200)
                                    .Background(Colors.Grey.Lighten3)
                                    .Padding(10)
                                    //.Box()
                                    .Element(element =>
                                    {
                                        foreach (var x in Enumerable.Range(0, turns))
                                            element = element.RotateRight();

                                        return element;
                                    })
                                    .Text($"Rotated {turns * 90} degrees.", TextStyle.Default.Size(14));
                            }
                        });
                });
        }
        
        [Test]
        public void Flip()
        {
            RenderingTest
                .Create()
                .PageSize(450, 450)
                .Render(container =>
                {
                    container
                        .Background("#FFF")
                        .Padding(20)
                        .Grid(grid =>
                        {
                            grid.Columns(2);
                            grid.Spacing(10);
                            
                            foreach (var turns in Enumerable.Range(0, 4))
                            {
                                grid.Item()
                                    .Width(200)
                                    .Height(200)
                                    .Background(Colors.Grey.Lighten3)
                                    .Padding(10)
                                    .Element(element =>
                                    {
                                        if (turns == 1 || turns == 2)
                                            element = element.FlipX();

                                        if (turns == 2 || turns == 3)
                                            element = element.FlipY();
                                        
                                        return element;
                                    })
                                    .Text($"Flipped.", TextStyle.Default.Size(14));
                            }
                        });
                });
        }
    }
}