using Microsoft.EntityFrameworkCore;

namespace RobotNet10.MapManager.Data;

/// <summary>
/// Database context for VDMA LIF 1.0.0 Map Manager
/// </summary>
public class MapDbContext(DbContextOptions<MapDbContext> options) : DbContext(options)
{

    // DbSets
    public DbSet<Layout> Layouts { get; set; } = null!;
    public DbSet<LayoutVersion> LayoutVersions { get; set; } = null!;
    public DbSet<LayoutLevel> LayoutLevels { get; set; } = null!;
    public DbSet<VehicleType> VehicleTypes { get; set; } = null!;
    public DbSet<Node> Nodes { get; set; } = null!;
    public DbSet<Edge> Edges { get; set; } = null!;
    public DbSet<Station> Stations { get; set; } = null!;
    public DbSet<StationInteractionNode> StationInteractionNodes { get; set; } = null!;
    public DbSet<NodeVehicleProperty> NodeVehicleProperties { get; set; } = null!;
    public DbSet<EdgeVehicleProperty> EdgeVehicleProperties { get; set; } = null!;
    public DbSet<LayoutLevelEditorSettings> LayoutLevelEditorSettings { get; set; } = null!;

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);

        // Layout configuration
        modelBuilder.Entity<Layout>(entity =>
        {
            entity.HasKey(e => e.Id);
            entity.HasIndex(e => e.LayoutId).IsUnique();
            entity.HasIndex(e => e.IsActive);

            entity.HasMany(e => e.Versions)
                .WithOne(e => e.Layout)
                .HasForeignKey(e => e.LayoutId)
                .OnDelete(DeleteBehavior.Cascade);
        });

        // LayoutVersion configuration
        modelBuilder.Entity<LayoutVersion>(entity =>
        {
            entity.HasKey(e => e.Id);
            entity.HasIndex(e => new { e.LayoutId, e.Version }).IsUnique();
            entity.HasIndex(e => e.IsActive);

            entity.HasMany(e => e.Levels)
                .WithOne(e => e.Version)
                .HasForeignKey(e => e.VersionId)
                .OnDelete(DeleteBehavior.Cascade);
        });

        // LayoutLevel configuration
        modelBuilder.Entity<LayoutLevel>(entity =>
        {
            entity.HasKey(e => e.Id);
            entity.HasIndex(e => new { e.VersionId, e.LayoutLevelId }).IsUnique();
            entity.HasIndex(e => e.LevelOrder);

            entity.HasMany(e => e.Nodes)
                .WithOne(e => e.Level)
                .HasForeignKey(e => e.LevelId)
                .OnDelete(DeleteBehavior.Cascade);

            entity.HasMany(e => e.Edges)
                .WithOne(e => e.Level)
                .HasForeignKey(e => e.LevelId)
                .OnDelete(DeleteBehavior.Cascade);

            entity.HasMany(e => e.Stations)
                .WithOne(e => e.Level)
                .HasForeignKey(e => e.LevelId)
                .OnDelete(DeleteBehavior.Cascade);
        });

        // VehicleType configuration
        modelBuilder.Entity<VehicleType>(entity =>
        {
            entity.HasKey(e => e.Id);
            entity.HasIndex(e => e.VehicleTypeId).IsUnique();
            entity.HasIndex(e => e.IsActive);

            entity.HasMany(e => e.NodeVehicleProperties)
                .WithOne(e => e.VehicleType)
                .HasForeignKey(e => e.VehicleTypeId)
                .OnDelete(DeleteBehavior.Cascade);

            entity.HasMany(e => e.EdgeVehicleProperties)
                .WithOne(e => e.VehicleType)
                .HasForeignKey(e => e.VehicleTypeId)
                .OnDelete(DeleteBehavior.Cascade);
        });

        // Node configuration
        modelBuilder.Entity<Node>(entity =>
        {
            entity.HasKey(e => e.Id);
            entity.HasIndex(e => new { e.LevelId, e.NodeId }).IsUnique();
            entity.HasIndex(e => e.NodeId);
            entity.HasIndex(e => e.MapId);
            entity.HasIndex(e => new { e.X, e.Y });

            entity.HasMany(e => e.VehicleProperties)
                .WithOne(e => e.Node)
                .HasForeignKey(e => e.NodeId)
                .OnDelete(DeleteBehavior.Cascade);

            entity.HasMany(e => e.OutgoingEdges)
                .WithOne(e => e.StartNode)
                .HasForeignKey(e => e.StartNodeId)
                .OnDelete(DeleteBehavior.Restrict);

            entity.HasMany(e => e.IncomingEdges)
                .WithOne(e => e.EndNode)
                .HasForeignKey(e => e.EndNodeId)
                .OnDelete(DeleteBehavior.Restrict);

            entity.HasMany(e => e.StationInteractions)
                .WithOne(e => e.Node)
                .HasForeignKey(e => e.NodeId)
                .OnDelete(DeleteBehavior.Restrict);
        });

        // Edge configuration
        modelBuilder.Entity<Edge>(entity =>
        {
            entity.HasKey(e => e.Id);
            entity.HasIndex(e => new { e.LevelId, e.EdgeId }).IsUnique();
            entity.HasIndex(e => e.EdgeId);
            entity.HasIndex(e => e.StartNodeId);
            entity.HasIndex(e => e.EndNodeId);

            entity.ToTable(t => t.HasCheckConstraint("CK_Edges_DifferentNodes", "[StartNodeId] <> [EndNodeId]"));

            entity.HasMany(e => e.VehicleProperties)
                .WithOne(e => e.Edge)
                .HasForeignKey(e => e.EdgeId)
                .OnDelete(DeleteBehavior.Cascade);
        });

        // Station configuration
        modelBuilder.Entity<Station>(entity =>
        {
            entity.HasKey(e => e.Id);
            entity.HasIndex(e => new { e.LevelId, e.StationId }).IsUnique();
            entity.HasIndex(e => e.StationId);

            entity.HasMany(e => e.InteractionNodes)
                .WithOne(e => e.Station)
                .HasForeignKey(e => e.StationId)
                .OnDelete(DeleteBehavior.Cascade);
        });

        // StationInteractionNode configuration
        modelBuilder.Entity<StationInteractionNode>(entity =>
        {
            entity.HasKey(e => e.Id);
            entity.HasIndex(e => new { e.StationId, e.NodeId }).IsUnique();
            entity.HasIndex(e => e.StationId);
            entity.HasIndex(e => e.NodeId);
        });

        // NodeVehicleProperty configuration
        modelBuilder.Entity<NodeVehicleProperty>(entity =>
        {
            entity.HasKey(e => e.Id);
            entity.HasIndex(e => new { e.NodeId, e.VehicleTypeId }).IsUnique();
            entity.HasIndex(e => e.NodeId);
            entity.HasIndex(e => e.VehicleTypeId);
        });

        // EdgeVehicleProperty configuration
        modelBuilder.Entity<EdgeVehicleProperty>(entity =>
        {
            entity.HasKey(e => e.Id);
            entity.HasIndex(e => new { e.EdgeId, e.VehicleTypeId }).IsUnique();
            entity.HasIndex(e => e.EdgeId);
            entity.HasIndex(e => e.VehicleTypeId);
        });

        // LayoutLevelEditorSettings configuration (UI extensions - not VDMA LIF)
        modelBuilder.Entity<LayoutLevelEditorSettings>(entity =>
        {
            entity.HasKey(e => e.Id);
            
            // 1-to-1 relationship with LayoutLevel (unique index on LevelId)
            entity.HasIndex(e => e.LevelId).IsUnique();

            entity.HasOne(e => e.Level)
                .WithOne(l => l.EditorSettings)
                .HasForeignKey<LayoutLevelEditorSettings>(e => e.LevelId)
                .OnDelete(DeleteBehavior.Cascade);
        });
    }
}