using System;
using Microsoft.EntityFrameworkCore.Migrations;
using Rag.Data;

#nullable disable

namespace Rag.Data.Migrations
{
    /// <inheritdoc />
    public partial class InitialRagSchema : Migration
    {
        /// <inheritdoc />
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.EnsureSchema(
                name: MigrationConstants.SchemaName);

            migrationBuilder.CreateTable(
                name: "ChatCompletionCache",
                schema: MigrationConstants.SchemaName,
                columns: table => new
                {
                    CacheKey = table.Column<string>(type: "nvarchar(64)", maxLength: 64, nullable: false),
                    Model = table.Column<string>(type: "nvarchar(120)", maxLength: 120, nullable: false),
                    Temperature = table.Column<decimal>(type: "decimal(4,2)", nullable: false),
                    ResponseText = table.Column<string>(type: "nvarchar(max)", nullable: false),
                    CreatedAt = table.Column<DateTime>(type: "datetime2", nullable: false, defaultValueSql: "SYSUTCDATETIME()")
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_ChatCompletionCache", x => x.CacheKey);
                });

            migrationBuilder.CreateTable(
                name: "Documents",
                schema: MigrationConstants.SchemaName,
                columns: table => new
                {
                    Id = table.Column<string>(type: "nvarchar(64)", maxLength: 64, nullable: false),
                    DocumentType = table.Column<string>(type: "nvarchar(80)", maxLength: 80, nullable: false),
                    Title = table.Column<string>(type: "nvarchar(300)", maxLength: 300, nullable: false),
                    SourceUrl = table.Column<string>(type: "nvarchar(1200)", maxLength: 1200, nullable: true),
                    RawText = table.Column<string>(type: "nvarchar(max)", nullable: false),
                    TextHash = table.Column<string>(type: "nvarchar(64)", maxLength: 64, nullable: false),
                    TypeConfidence = table.Column<double>(type: "float", nullable: false),
                    MetadataJson = table.Column<string>(type: "nvarchar(max)", nullable: false, defaultValue: "{}"),
                    CreatedAt = table.Column<DateTime>(type: "datetime2", nullable: false, defaultValueSql: "SYSUTCDATETIME()")
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_Documents", x => x.Id);
                });

            migrationBuilder.CreateTable(
                name: "EmbeddingCache",
                schema: MigrationConstants.SchemaName,
                columns: table => new
                {
                    CacheKey = table.Column<string>(type: "nvarchar(64)", maxLength: 64, nullable: false),
                    Model = table.Column<string>(type: "nvarchar(120)", maxLength: 120, nullable: false),
                    TextHash = table.Column<string>(type: "nvarchar(64)", maxLength: 64, nullable: false),
                    Vector = table.Column<byte[]>(type: "varbinary(max)", nullable: false),
                    CreatedAt = table.Column<DateTime>(type: "datetime2", nullable: false, defaultValueSql: "SYSUTCDATETIME()")
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_EmbeddingCache", x => x.CacheKey);
                });

            migrationBuilder.CreateTable(
                name: "Chunks",
                schema: MigrationConstants.SchemaName,
                columns: table => new
                {
                    Id = table.Column<string>(type: "nvarchar(64)", maxLength: 64, nullable: false),
                    DocumentId = table.Column<string>(type: "nvarchar(64)", maxLength: 64, nullable: false),
                    ChunkIndex = table.Column<int>(type: "int", nullable: false),
                    Text = table.Column<string>(type: "nvarchar(max)", nullable: false),
                    Embedding = table.Column<byte[]>(type: "varbinary(max)", nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_Chunks", x => x.Id);
                    table.ForeignKey(
                        name: "FK_Chunks_Documents_DocumentId",
                        column: x => x.DocumentId,
                        principalSchema: MigrationConstants.SchemaName,
                        principalTable: "Documents",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                });

            migrationBuilder.CreateIndex(
                name: "IX_Chunks_DocumentId",
                schema: MigrationConstants.SchemaName,
                table: "Chunks",
                column: "DocumentId");

            migrationBuilder.CreateIndex(
                name: "IX_Documents_DocumentType",
                schema: MigrationConstants.SchemaName,
                table: "Documents",
                column: "DocumentType");

            migrationBuilder.CreateIndex(
                name: "IX_Documents_TextHash",
                schema: MigrationConstants.SchemaName,
                table: "Documents",
                column: "TextHash");

            migrationBuilder.CreateIndex(
                name: "IX_EmbeddingCache_TextHash",
                schema: MigrationConstants.SchemaName,
                table: "EmbeddingCache",
                column: "TextHash");
        }

        /// <inheritdoc />
        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.DropTable(
                name: "ChatCompletionCache",
                schema: MigrationConstants.SchemaName);

            migrationBuilder.DropTable(
                name: "Chunks",
                schema: MigrationConstants.SchemaName);

            migrationBuilder.DropTable(
                name: "EmbeddingCache",
                schema: MigrationConstants.SchemaName);

            migrationBuilder.DropTable(
                name: "Documents",
                schema: MigrationConstants.SchemaName);
        }
    }
}
