using Microsoft.EntityFrameworkCore;
using Mws.Application.Auth;
using Mws.Application.Permissions;
using Mws.Domain.Documents;
using Mws.Domain.Projects;
using Mws.Domain.Roles;
using Mws.Domain.Tasks;
using Mws.Domain.Users;
using TaskPriority = Mws.Domain.Tasks.TaskPriority;
using TaskStatus = Mws.Domain.Tasks.TaskStatus;

namespace Mws.Infrastructure.Persistence;

public static class DbSeeder
{
    public static async Task SeedAsync(AppDbContext db, IPasswordHasher passwordHasher)
    {
        if (await db.Users.AnyAsync())
        {
            return;
        }

        var now = DateTime.UtcNow;

        var adminRole = new Role { Id = Guid.NewGuid(), Name = "Admin", IsSystem = true, CreatedAt = now, UpdatedAt = now };
        var memberRole = new Role { Id = Guid.NewGuid(), Name = "Member", IsSystem = true, CreatedAt = now, UpdatedAt = now };

        adminRole.Permissions = ScreenCatalog.Screens.Select(s => new RolePermission
        {
            RoleId = adminRole.Id, Screen = s.Key, CanView = true, CanCreate = true, CanEdit = true, CanDelete = true,
        }).ToList();

        memberRole.Permissions = ScreenCatalog.Screens
            .Where(s => s.Key is not ("accounts" or "roles"))
            .Select(s => new RolePermission
            {
                RoleId = memberRole.Id, Screen = s.Key, CanView = true, CanCreate = true, CanEdit = true, CanDelete = false,
            }).ToList();

        db.Roles.AddRange(adminRole, memberRole);
        await db.SaveChangesAsync();

        var admin = new User
        {
            Id = Guid.NewGuid(),
            Username = "admin",
            PasswordHash = passwordHasher.Hash("password"),
            DisplayName = "Admin",
            RoleId = adminRole.Id,
            CreatedAt = now,
            UpdatedAt = now,
        };

        var alice = new User
        {
            Id = Guid.NewGuid(),
            Username = "alice",
            PasswordHash = passwordHasher.Hash("password"),
            DisplayName = "Alice",
            RoleId = memberRole.Id,
            CreatedAt = now,
            UpdatedAt = now,
        };

        var bob = new User
        {
            Id = Guid.NewGuid(),
            Username = "bob",
            PasswordHash = passwordHasher.Hash("password"),
            DisplayName = "Bob",
            RoleId = memberRole.Id,
            CreatedAt = now,
            UpdatedAt = now,
        };

        db.Users.AddRange(admin, alice, bob);
        await db.SaveChangesAsync();

        var project = new Project
        {
            Id = Guid.NewGuid(),
            Name = "MWS",
            Description = "My Workspace - internal tool for the team.",
            Status = ProjectStatus.Active,
            CreatedAt = now,
            UpdatedAt = now,
        };

        db.Projects.Add(project);

        db.ProjectMembers.AddRange(
            new ProjectMember { ProjectId = project.Id, UserId = admin.Id, Role = MemberRole.Owner },
            new ProjectMember { ProjectId = project.Id, UserId = alice.Id, Role = MemberRole.Member },
            new ProjectMember { ProjectId = project.Id, UserId = bob.Id, Role = MemberRole.Member });

        db.ProjectMemberPermissions.AddRange(
            new ProjectMemberPermission { ProjectId = project.Id, UserId = alice.Id, Screen = ProjectPermissionScreens.Documents, CanView = true },
            new ProjectMemberPermission { ProjectId = project.Id, UserId = bob.Id, Screen = ProjectPermissionScreens.Documents, CanView = true });

        await db.SaveChangesAsync();

        var requirements = new Document
        {
            Id = Guid.NewGuid(), ProjectId = project.Id, ParentId = null,
            Title = "Requirements", Type = DocumentType.Folder,
            CreatedBy = admin.Id, CreatedAt = now, UpdatedBy = admin.Id, UpdatedAt = now,
        };

        var design = new Document
        {
            Id = Guid.NewGuid(), ProjectId = project.Id, ParentId = null,
            Title = "Technical Design", Type = DocumentType.Folder,
            CreatedBy = admin.Id, CreatedAt = now, UpdatedBy = admin.Id, UpdatedAt = now,
        };

        var notes = new Document
        {
            Id = Guid.NewGuid(), ProjectId = project.Id, ParentId = null,
            Title = "Notes", Type = DocumentType.Folder,
            CreatedBy = admin.Id, CreatedAt = now, UpdatedBy = admin.Id, UpdatedAt = now,
        };

        db.Documents.AddRange(requirements, design, notes);
        db.Documents.Add(new Document
        {
            Id = Guid.NewGuid(), ProjectId = project.Id, ParentId = requirements.Id,
            Title = "Authentication", Type = DocumentType.Document,
            Content = "<h2>Authentication</h2><p>Phase 1 uses simple username/password with JWT.</p>",
            CreatedBy = admin.Id, CreatedAt = now, UpdatedBy = admin.Id, UpdatedAt = now,
        });
        db.Documents.Add(new Document
        {
            Id = Guid.NewGuid(), ProjectId = project.Id, ParentId = requirements.Id,
            Title = "User Management", Type = DocumentType.Document,
            Content = "<h2>User Management</h2><p>Users are created via seeding in Phase 1.</p>",
            CreatedBy = admin.Id, CreatedAt = now, UpdatedBy = admin.Id, UpdatedAt = now,
        });
        db.Documents.Add(new Document
        {
            Id = Guid.NewGuid(), ProjectId = project.Id, ParentId = design.Id,
            Title = "API Design", Type = DocumentType.Document,
            Content = "<h2>API Design</h2><p>REST API with ASP.NET Core Web API.</p>",
            CreatedBy = admin.Id, CreatedAt = now, UpdatedBy = admin.Id, UpdatedAt = now,
        });
        await db.SaveChangesAsync();

        db.Tasks.AddRange(
            new TaskItem
            {
                Id = Guid.NewGuid(), ProjectId = project.Id, Title = "Set up solution",
                Status = TaskStatus.Done, Priority = TaskPriority.High, AssigneeId = admin.Id,
                CreatedBy = admin.Id, CreatedAt = now, UpdatedAt = now,
            },
            new TaskItem
            {
                Id = Guid.NewGuid(), ProjectId = project.Id, Title = "Implement authentication",
                Description = "Login endpoint with BCrypt and JWT.",
                Status = TaskStatus.InProgress, Priority = TaskPriority.High, AssigneeId = alice.Id,
                DueDate = now.AddDays(3),
                CreatedBy = admin.Id, CreatedAt = now, UpdatedAt = now,
            },
            new TaskItem
            {
                Id = Guid.NewGuid(), ProjectId = project.Id, Title = "Task board drag & drop",
                Status = TaskStatus.Todo, Priority = TaskPriority.Medium, AssigneeId = bob.Id,
                DueDate = now.AddDays(7),
                CreatedBy = admin.Id, CreatedAt = now, UpdatedAt = now,
            },
            new TaskItem
            {
                Id = Guid.NewGuid(), ProjectId = project.Id, Title = "Polish documents UI",
                Status = TaskStatus.Todo, Priority = TaskPriority.Low,
                CreatedBy = admin.Id, CreatedAt = now, UpdatedAt = now,
            });

        await db.SaveChangesAsync();
    }
}