using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata;
using Tiku.Domain.Content;
using Tiku.Domain.QuestionBanks;
using Tiku.Infrastructure.Persistence;

namespace Tiku.IntegrationTests;

public sealed class PersistenceModelTests
{
    private static readonly DbContextOptions<TikuDbContext> Options =
        new DbContextOptionsBuilder<TikuDbContext>()
            .UseNpgsql("Host=localhost;Database=tiku_model_tests;Username=postgres")
            .Options;

    [Fact]
    public void Core_model_contains_expected_tables()
    {
        using var context = new TikuDbContext(Options);

        var tableNames = context.Model.GetEntityTypes()
            .Select(entity => entity.GetTableName())
            .ToHashSet(StringComparer.Ordinal);

        Assert.Equal(28, tableNames.Count);
        Assert.Contains("tenants", tableNames);
        Assert.Contains("tenant_settings", tableNames);
        Assert.Contains("content_entries", tableNames);
        Assert.Contains("content_nodes", tableNames);
        Assert.Contains("question_collections", tableNames);
        Assert.Contains("practice_blueprints", tableNames);
        Assert.Contains("questions", tableNames);
        Assert.Contains("question_versions", tableNames);
        Assert.Contains("answer_records", tableNames);
    }

    [Fact]
    public void Content_node_path_is_mapped_to_ltree()
    {
        using var context = new TikuDbContext(Options);

        var path = context.Model.FindEntityType(typeof(ContentNode))!
            .FindProperty(nameof(ContentNode.Path))!;

        Assert.Equal("ltree", path.GetColumnType());
    }

    [Fact]
    public void Collection_relations_include_tenant_in_foreign_keys()
    {
        using var context = new TikuDbContext(Options);

        var foreignKeys = context.Model.FindEntityType(typeof(QuestionCollection))!
            .GetForeignKeys()
            .Where(foreignKey => foreignKey.Properties.Count > 1)
            .Select(foreignKey => foreignKey.Properties
                .Select(property => property.Name)
                .ToArray());

        Assert.All(
            foreignKeys,
            properties => Assert.Contains("TenantId", properties));
    }

    [Theory]
    [InlineData(nameof(Question.Tags), "'[]'::jsonb")]
    public void Question_json_properties_are_mapped_to_jsonb(
        string propertyName,
        string expectedDefaultValueSql)
    {
        using var context = new TikuDbContext(Options);

        var property = context.Model.FindEntityType(typeof(Question))!
            .FindProperty(propertyName)!;

        Assert.Equal("jsonb", property.GetColumnType());
        Assert.Equal(expectedDefaultValueSql, property.GetDefaultValueSql());
        Assert.Equal(typeof(System.Text.Json.JsonElement), property.ClrType);
    }

    [Fact]
    public void Question_relations_include_tenant_in_foreign_keys()
    {
        using var context = new TikuDbContext(Options);

        var foreignKeys = context.Model.FindEntityType(typeof(Question))!
            .GetForeignKeys()
            .Select(foreignKey => foreignKey.Properties
                .Select(property => property.Name)
                .ToArray())
            .ToArray();

        Assert.All(
            foreignKeys.Where(properties => properties.Length > 1),
            properties => Assert.Contains("TenantId", properties));

        Assert.Contains(
            foreignKeys,
            properties => properties.SequenceEqual(
                ["TenantId", "Id", "CurrentVersionId"]));
    }
}