using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Application.Domain.Entities;
using Infrastructure.Data;
using Infrastructure.Domain;
using Infrastructure.Email;
using Infrastructure.Extensions;
using Infrastructure.Sms;
using Infrastructure.Web;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

namespace StudyCenter
{
    public class Startup : BaseStartup
    {
        public Startup(IConfiguration configuration, IHostingEnvironment env) : base(configuration, env)
        {
        }

        public override void ConfigureServices(IServiceCollection services)
        {
            services.AddTransient<IEmailSender, EmptyEmailSender>();
            services.AddTransient<ISmsSender, EmptySmsSender>();
            services.AddSignalR(o => o.EnableDetailedErrors = true);
            base.ConfigureServices(services);
        }

        public override Task ValidatePrincipal(CookieValidatePrincipalContext arg)
        {
            return Task.Run(() =>
            {
                var userRepo = arg.HttpContext.RequestServices.GetService<IRepository<User>>();

                var userName = arg.Principal.Identity.Name;
                var userPermissions = userRepo.ReadOnlyTable().Where(o => o.UserName == userName)
                                 .SelectMany(o => o.UserRoles)
                                 .Select(o => o.Role)
                                 .SelectMany(o => o.RolePermissions)
                                 .Select(o => o.Permission.Number)
                                 .ToList();
                var currentPermissions = arg.Principal.Claims.Where(o => o.Type == "Role").Select(o => o.Value).ToList();
                if (!currentPermissions.SequenceEqual(userPermissions))
                {
                    arg.HttpContext.SignOutAsync();
                    arg.HttpContext.SignIn(userName, userPermissions, arg.Properties.IsPersistent);
                }
            });
        }

        public override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder.Entity<PermissionCategory>().HasOne(o => o.Parent).WithMany(o => o.Children).HasForeignKey(o => o.ParentId);
            modelBuilder.Entity<Permission>().HasOne(o => o.Category).WithMany(o => o.Permissions).HasForeignKey(o => o.CategoryId);
            modelBuilder.Entity<UserRole>().HasOne(o => o.User).WithMany(o => o.UserRoles).HasForeignKey(o => o.UserId);
            modelBuilder.Entity<UserRole>().HasOne(o => o.Role).WithMany(o => o.UserRoles).HasForeignKey(o => o.RoleId);
            modelBuilder.Entity<RolePermission>().HasOne(o => o.Role).WithMany(o => o.RolePermissions).HasForeignKey(o => o.RoleId);
            modelBuilder.Entity<RolePermission>().HasOne(o => o.Permission).WithMany(o => o.RolePermissions).HasForeignKey(o => o.PermissionId);
            modelBuilder.Entity<User>().HasIndex(o => o.UserName).IsUnique();
            modelBuilder.Entity<Role>().HasIndex(o => o.Name).IsUnique();
            modelBuilder.Entity<PermissionCategory>().HasIndex(o => o.Number).IsUnique();
            modelBuilder.Entity<Permission>().HasIndex(o => o.Number).IsUnique();
            modelBuilder.Entity<UserRole>().HasIndex(o => new { o.UserId, o.RoleId }).IsUnique();
            modelBuilder.Entity<RolePermission>().HasIndex(o => new { o.RoleId, o.PermissionId }).IsUnique();
            //学校课程
            //专业分类用来组织学校、学院、系等
            modelBuilder.Entity<MajorCategory>().HasOne(o => o.Parent).WithMany(o => o.Children).HasForeignKey(o => o.ParentId);
            modelBuilder.Entity<MajorCategory>().HasIndex(o => new { o.ParentId, o.Number }).IsUnique();
            //专业用来组织不同学制，如3年专科、4年本科
            modelBuilder.Entity<Major>().HasOne(o => o.Category).WithMany(o => o.Majors).HasForeignKey(o => o.CategoryId);
            //每批次入学的学生，按照学制、就业方向等制定不同的教学计划
            modelBuilder.Entity<TeachingPlan>().HasOne(o => o.Major).WithMany(o => o.Plans).HasForeignKey(o => o.MajorId);
            //每个教学计划包含不同个学期和就业方向
            modelBuilder.Entity<Semester>().HasOne(o => o.Plan).WithMany(o => o.Semesters).HasForeignKey(o => o.PlanId);
            //每个学期包含多个学期课程
            modelBuilder.Entity<SemesterCourse>().HasOne(o => o.Semester).WithMany(o => o.Courses).HasForeignKey(o => o.SemesterId);
            //一个课程期对应多个教学计划学期中的课程，这样将学校的学期课程和课程的期统一起来
            modelBuilder.Entity<SemesterCourse>().HasOne(o => o.Term).WithMany(o => o.SemesterCourses).HasForeignKey(o => o.TermId);

            //课程分类
            modelBuilder.Entity<CourseCategory>().HasOne(o => o.Parent).WithMany(o => o.Children).HasForeignKey(o => o.ParentId);
            modelBuilder.Entity<CourseCategory>().HasIndex(o => new { o.ParentId, o.Number }).IsUnique();

            //课程分类
            modelBuilder.Entity<BookCategory>().HasOne(o => o.Parent).WithMany(o => o.Children).HasForeignKey(o => o.ParentId);
            modelBuilder.Entity<BookCategory>().HasIndex(o => new { o.ParentId, o.Number }).IsUnique();
            modelBuilder.Entity<Book>().HasOne(o => o.BookCategory).WithMany(o => o.Books).HasForeignKey(o => o.BookCategoryId);
            modelBuilder.Entity<Section>().HasOne(o => o.Parent).WithMany(o => o.Children).HasForeignKey(o => o.ParentId);
            modelBuilder.Entity<Section>().HasIndex(o => new { o.ParentId, o.Number }).IsUnique();

            //每本书有多个章节
            modelBuilder.Entity<Section>().HasOne(o => o.Book).WithMany(o => o.Sections).HasForeignKey(o => o.BookId);

            //课程
            modelBuilder.Entity<Course>().HasOne(o => o.Category).WithMany(o => o.Courses).HasForeignKey(o => o.CategoryId);
            //每个课程有多个期
            modelBuilder.Entity<Term>().HasOne(o => o.Course).WithMany(o => o.Terms).HasForeignKey(o => o.CourseId);
            modelBuilder.Entity<Term>().HasOne(o => o.Book).WithMany(o => o.Terms).HasForeignKey(o => o.BookId);
            //每期有多个课时
            modelBuilder.Entity<Lesson>().HasOne(o => o.Term).WithMany(o => o.Lessons).HasForeignKey(o => o.TermId);

            //课时和资源多对多多对多
            modelBuilder.Entity<LessonResource>().HasOne(o => o.Lesson).WithMany(o => o.LessonResources).HasForeignKey(o => o.LessionId);
            modelBuilder.Entity<LessonResource>().HasOne(o => o.Resource).WithMany(o => o.LessonResources).HasForeignKey(o => o.ResourceId);
            modelBuilder.Entity<LessonResource>().HasIndex(o => new { o.LessionId, o.ResourceId }).IsUnique();

            //学生和课程的期多对多
            modelBuilder.Entity<TermUser>().HasOne(o => o.Term).WithMany(o => o.TermUsers).HasForeignKey(o => o.TermId);
            modelBuilder.Entity<TermUser>().HasOne(o => o.User).WithMany(o => o.TermUsers).HasForeignKey(o => o.UserId);
            modelBuilder.Entity<TermUser>().HasIndex(o => new { o.TermId, o.UserId }).IsUnique();

            modelBuilder.Entity<ResourceCategory>().HasOne(o => o.Parent).WithMany(o => o.Children).HasForeignKey(o => o.ParentId);
            modelBuilder.Entity<Resource>().HasOne(o => o.User).WithMany(o => o.Resources).HasForeignKey(o => o.UserId);
            modelBuilder.Entity<Resource>().HasOne(o => o.Category).WithMany(o => o.Resources).HasForeignKey(o => o.CategoryId);
            modelBuilder.Entity<Resource>().HasOne(o => o.Course).WithMany(o => o.Resources).HasForeignKey(o => o.CourseId);
            modelBuilder.Entity<Resource>().HasOne(o => o.Section).WithMany(o => o.Resources).HasForeignKey(o => o.SectionId);
            modelBuilder.Entity<Resource>().Property(o => o.Name).IsRequired().HasMaxLength(255);
            //习题
            modelBuilder.Entity<Question>().HasOne(o => o.User).WithMany(o => o.Questions).HasForeignKey(o => o.UserId);
            modelBuilder.Entity<Question>().HasOne(o => o.Course).WithMany(o => o.Questions).HasForeignKey(o => o.CourseId);
            modelBuilder.Entity<Question>().HasOne(o => o.Section).WithMany(o => o.Questions).HasForeignKey(o => o.SectionId);
            //习题答题记录
            modelBuilder.Entity<UserQuestion>().HasOne(o => o.User).WithMany(o => o.UserQuestions).HasForeignKey(o => o.UserId);
            modelBuilder.Entity<UserQuestion>().HasOne(o => o.Question).WithMany(o => o.UserQuestions).HasForeignKey(o => o.QuestionId);
            modelBuilder.Entity<UserQuestion>().HasIndex(o => new { o.UserId, o.QuestionId }).IsUnique();
            //试题答题记录
            modelBuilder.Entity<UserPaperQuestion>().HasOne(o => o.User).WithMany(o => o.UserPaperQuestions).HasForeignKey(o => o.UserId);
            modelBuilder.Entity<UserPaperQuestion>().HasOne(o => o.PaperQuestion).WithMany(o => o.UserPaperQuestions).HasForeignKey(o => o.PaperQuestionId);
            modelBuilder.Entity<UserPaperQuestion>().HasIndex(o => new { o.UserId, o.PaperQuestionId }).IsUnique();
            //试卷答题记录
            modelBuilder.Entity<UserPaper>().HasOne(o => o.User).WithMany(o => o.UserPapers).HasForeignKey(o => o.UserId);
            modelBuilder.Entity<UserPaper>().HasOne(o => o.Paper).WithMany(o => o.UserPapers).HasForeignKey(o => o.PaperId);
            modelBuilder.Entity<UserPaper>().HasIndex(o => new { o.UserId, o.PaperId }).IsUnique();

            //考题是具有习题的属性和分值等其他和试卷相关的属性
            modelBuilder.Entity<PaperQuestion>().HasOne(o => o.Paper).WithMany(o => o.Questions).HasForeignKey(o => o.PaperId);
        }

        public override void Seed(DbContext dbContext, IServiceProvider serviceProvider, IConfiguration configuration)
        {
            dbContext.Set<PermissionCategory>().Add(new PermissionCategory
            {
                Name = "配置",
                Number = "Configuration",
                Permissions = new List<Permission> {
                    new Permission { Name = "查询配置", Number = "ListConfiguration",DisplayOrder =1 },
                    new Permission { Name = "修改配置", Number = "EditConfiguration",DisplayOrder =2 }
                }
            });
            int i = 1;
            var skipReadCollection = new string[] { "Permission" };
            var skipAddCollection = new string[] { "Permission", "Setting", "Node", "Device", "Data", "Api", "Parameter" };
            foreach (var item in dbContext.Model.GetEntityTypes())
            {
                var type = item.ClrType;
                var name = type.GetDisplayName();
                var number = type.Name;
                var category = new PermissionCategory
                {
                    Name = name,
                    Number = type.Name,
                    DisplayOrder = i
                };
                category.Permissions.Add(new Permission { Name = $"查询{name}", Number = $"List{number}", DisplayOrder = 10 * i + 1 });
                if (!skipReadCollection.Contains(type.Name))
                {
                    category.Permissions.Add(new Permission { Name = $"查看{name}", Number = $"Read{number}", DisplayOrder = 10 * i + 2 });
                }
                if (!skipAddCollection.Contains(type.Name))
                {
                    category.Permissions.Add(new Permission { Name = $"添加{name}", Number = $"Add{number}", DisplayOrder = 10 * i + 3 });
                }
                if (!typeof(IDisableUpdate).IsAssignableFrom(type))
                {
                    category.Permissions.Add(new Permission { Name = $"修改{name}", Number = $"Edit{number}", DisplayOrder = 10 * i + 4 });
                }
                if (!typeof(IDisableDelete).IsAssignableFrom(type))
                {
                    category.Permissions.Add(new Permission { Name = $"删除{name}", Number = $"Delete{number}", DisplayOrder = 10 * i + 5 });
                }
                dbContext.Set<PermissionCategory>().Add(category);
                i += 1;
            }
            dbContext.SaveChanges();
            var adminRole = new Role { Name = "管理员", IsReadOnly = true };
            foreach (var item in dbContext.Set<Permission>())
            {
                adminRole.RolePermissions.Add(new RolePermission { Permission = item, IsReadOnly = true });
            }
            var user1Id = dbContext.Set<User>().Add(new User
            {
                UserName = "admin",
                UserRoles = new List<UserRole> { new UserRole { Role = adminRole } }
            }).Entity.Id;
            dbContext.SaveChanges();
            //课程分类
            dbContext.Set<CourseCategory>().Add(new CourseCategory { Name = "高职高专", Number = "2", DisplayOrder = 2 });
            dbContext.Set<CourseCategory>().Add(new CourseCategory { Name = "大学大专", Number = "3", DisplayOrder = 3 });
            dbContext.Set<CourseCategory>().Add(new CourseCategory { Name = "大学", Number = "4", DisplayOrder = 4 });
            dbContext.Set<CourseCategory>().Add(new CourseCategory { Name = "研究生", Number = "5", DisplayOrder = 5 });
            dbContext.Set<CourseCategory>().Add(new CourseCategory { Name = "成人教育", Number = "6", DisplayOrder = 6 });
            dbContext.Set<CourseCategory>().Add(new CourseCategory { Name = "职业培训", Number = "7", DisplayOrder = 7 });
            dbContext.SaveChanges();
            //教学计划
            var major1 =
            dbContext.Set<MajorCategory>().Add(new MajorCategory
            {
                Name = "计算机学院",
                Number = "0",
                Majors = new List<Major>
                {
                    new Major{
                        Name="计算机科学与技术",
                        Plans = new List<TeachingPlan>
                        {
                            new TeachingPlan
                            {
                                Start=DateTime.Now.Date,
                                Years=4,
                                Degree="学士",
                                Career="软件工程方向",
                                Semesters = new List<Semester>
                                {
                                    new Semester
                                    {
                                        Name="第1学期",
                                        Courses = new List<SemesterCourse>
                                        {
                                            new SemesterCourse
                                            {
                                                Name="计算机应用",
                                                Number ="106090100",
                                                Category="学科基础课",
                                                Type="必修课",
                                                Score=4
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            });
            dbContext.SaveChanges();
            //资源类型初始化
            var resourceTypeId1 = dbContext.Set<ResourceCategory>().Add(new ResourceCategory { Name = "文档", Number = "01", DisplayOrder = 01 }).Entity.Id;
            dbContext.Set<ResourceCategory>().Add(new ResourceCategory { Name = "音频", Number = "01", DisplayOrder = 01 });
            dbContext.Set<ResourceCategory>().Add(new ResourceCategory { Name = "视频", Number = "01", DisplayOrder = 01 });
            dbContext.Set<ResourceCategory>().Add(new ResourceCategory { Name = "动画", Number = "01", DisplayOrder = 01 });
            dbContext.Set<ResourceCategory>().Add(new ResourceCategory { Name = "虚拟仿真", Number = "01", DisplayOrder = 01 });
            //资源分类初始化
            dbContext.SaveChanges();
            dbContext.Set<CourseCategory>().Add(new CourseCategory
            {
                Name = "中职中专",
                Number = "1",
                DisplayOrder = 1,
                Children = new List<CourseCategory> {
                    new CourseCategory
                    {
                        Name="公开课",
                        Number="1",
                        DisplayOrder=1
                    },
                    new CourseCategory
                    {
                        Name="专业课",
                        Number="2",
                        DisplayOrder=2,
                        Children=new List<CourseCategory>
                        {
                            new CourseCategory
                            {
                                Name = "信息技术类",
                                Number = "10609",
                                DisplayOrder = 106,
                                Children = new List<CourseCategory>
                                {
                                    new CourseCategory
                                    {
                                        Name="计算机应用",
                                        Number="106090100",
                                        DisplayOrder=106010100,
                                        Courses = new List<Course>
                                        {
                                            new Course
                                            {
                                                Name="Java基础",
                                                Number="10001",
                                                Image="/upload/1.jpg",
                                                Description="本课程是以Java语言来讲授程序设计的入门知识，而非具体教授Java语言，关于Java语言的全面知识，还需要学习本课程的后续课程——“Java语言程序设计进阶”。",
                                                Terms = new List<Term>
                                                {
                                                    new Term
                                                    {
                                                        Name="2018-2019学年下学期",
                                                        Start= new DateTime(2018,9,1),
                                                        End=new DateTime(2019,1,1),
                                                        Lessons=new List<Lesson>
                                                        {
                                                            new Lesson
                                                            {
                                                                Name="导论",
                                                                DisplayOrder=1
                                                            },
                                                            new Lesson
                                                            {
                                                                Name="基础",
                                                                DisplayOrder=2
                                                            }
                                                        }
                                                    }
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            });
            dbContext.SaveChanges();
            dbContext.Set<BookCategory>().Add(new BookCategory
            {
                Name = "理科教材",
                Number = "0000",
                Books = new List<Book>
                {
                    new Book
                    {
                        Name="计算机应用基础",
                        Number="ISBN 0000",
                        Sections = new List<Section>
                        {
                            new Section
                            {
                                Name="导论上",
                                Number="1.1"
                            },
                            new Section
                            {
                                Name="导论下",
                                Number="1.2"
                            }
                        }
                    }
                }
            });
            dbContext.SaveChanges();
            dbContext.Set<Resource>().Add(new Resource
            {
                CategoryId = dbContext.Set<ResourceCategory>().FirstOrDefault(o => o.Name == "视频").Id,
                Name = "导论",
                File = "/upload/1.mp4",
                UserId = user1Id,
                CourseId = dbContext.Set<Course>().FirstOrDefault(o => o.Name == "Java基础").Id,
                SectionId = dbContext.Set<Section>().FirstOrDefault(o => o.Name == "导论上").Id,
            });
            dbContext.SaveChanges();
            dbContext.Set<LessonResource>().Add(new LessonResource
            {
                Name = "视频",
                LessionId = dbContext.Set<Lesson>().FirstOrDefault(o => o.Name == "导论").Id,
                ResourceId = dbContext.Set<Resource>().FirstOrDefault(o => o.Name == "导论").Id,
            });
            dbContext.SaveChanges();
            foreach (var item in dbContext.Set<CourseCategory>())
            {
                item.UpdatePath();
            }
            dbContext.SaveChanges();
        }
    }
}