using Marathon.Infrastructure.Persistence.Entities;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;

namespace Marathon.Infrastructure.Persistence.Configurations;

internal sealed class SnapshotConfiguration : IEntityTypeConfiguration<SnapshotEntity>
{
    public void Configure(EntityTypeBuilder<SnapshotEntity> builder)
    {
        builder.ToTable("Snapshots");

        builder.HasKey(s => s.Id);
        builder.Property(s => s.Id).HasColumnType("INTEGER").ValueGeneratedOnAdd();
        builder.Property(s => s.EventCode).HasColumnType("TEXT").IsRequired();
        builder.Property(s => s.CapturedAt).HasColumnType("TEXT").IsRequired();
        builder.Property(s => s.Source).HasColumnType("INTEGER").IsRequired();

        builder.HasIndex(s => s.EventCode).HasDatabaseName("IX_Snapshots_EventCode");

        // Snapshots is the largest table (live cadence 5–10s, 90-day retention) and
        // every hot read filters EventCode + CapturedAt range, often with an ORDER BY
        // CapturedAt. These composite indexes let SQLite satisfy the filter and the
        // ordering from the index instead of scanning + sorting the table.
        builder.HasIndex(s => new { s.EventCode, s.CapturedAt })
            .HasDatabaseName("IX_Snapshots_EventCode_CapturedAt");

        // Covers GetLatestPreMatchAsync: EventCode + Source filter, ORDER BY CapturedAt DESC.
        builder.HasIndex(s => new { s.EventCode, s.Source, s.CapturedAt })
            .HasDatabaseName("IX_Snapshots_EventCode_Source_CapturedAt");

        builder.HasMany(s => s.Bets)
            .WithOne(b => b.Snapshot)
            .HasForeignKey(b => b.SnapshotId)
            .OnDelete(DeleteBehavior.Cascade);
    }
}