using System;
using Data.SeaHavenIndustries;
using Microsoft.EntityFrameworkCore.Infrastructure;
using Microsoft.EntityFrameworkCore.Migrations;

#nullable disable

namespace Data.SeaHavenIndustries.Migrations
{
    [DbContext(typeof(ApplicationDbContext))]
    [Migration("20260723194013_AddVendorCompanyAndAudit")]
    public partial class AddVendorCompanyAndAudit : Migration
    {
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.AddColumn<int>(
                name: "CompanyId",
                table: "Vendors",
                type: "int",
                nullable: true);

            migrationBuilder.AddColumn<string>(
                name: "PreferredContact",
                table: "Vendors",
                type: "nvarchar(max)",
                nullable: true);

            migrationBuilder.CreateTable(
                name: "VendorCompanies",
                columns: table => new
                {
                    Id = table.Column<int>(type: "int", nullable: false)
                        .Annotation("SqlServer:Identity", "1, 1"),
                    Name = table.Column<string>(type: "nvarchar(max)", nullable: false),
                    NormalizedName = table.Column<string>(type: "nvarchar(450)", nullable: false),
                    CompanyPhone = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    Email = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    Address = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    City = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    State = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    Zip = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    GoogleMapsUrl = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    IsDeleted = table.Column<bool>(type: "bit", nullable: true),
                    createdby = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    DeleterUserId = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    DeletionTime = table.Column<DateTime>(type: "datetime2", nullable: true),
                    CreatedDate = table.Column<DateTime>(type: "datetime2", nullable: true),
                    LastModificationTime = table.Column<DateTime>(type: "datetime2", nullable: true),
                    LastModifierUserId = table.Column<int>(type: "int", nullable: true)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_VendorCompanies", x => x.Id);
                });

            migrationBuilder.CreateTable(
                name: "VendorAuditLogs",
                columns: table => new
                {
                    Id = table.Column<int>(type: "int", nullable: false)
                        .Annotation("SqlServer:Identity", "1, 1"),
                    VendorId = table.Column<int>(type: "int", nullable: false),
                    WorkOrderId = table.Column<int>(type: "int", nullable: true),
                    FieldName = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    OldValue = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    NewValue = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    Actor = table.Column<string>(type: "nvarchar(max)", nullable: true),
                    CreatedAt = table.Column<DateTime>(type: "datetime2", nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_VendorAuditLogs", x => x.Id);
                    table.ForeignKey(
                        name: "FK_VendorAuditLogs_Vendors_VendorId",
                        column: x => x.VendorId,
                        principalTable: "Vendors",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Restrict);
                });

            // Backfill: create one VendorCompany per distinct (case-insensitive, trimmed) legacy name.
            // Keep all company-owned fields from the same deterministic source vendor row.
            migrationBuilder.Sql(@"
WITH RankedVendors AS (
    SELECT
        v.[CompanyName] AS [Name],
        LOWER(LTRIM(RTRIM(v.[CompanyName]))) AS [NormalizedName],
        v.[CompanyPhone],
        v.[Email],
        v.[Address],
        v.[City],
        v.[State],
        v.[Zip],
        v.[GoogleMapsUrl],
        ROW_NUMBER() OVER (
            PARTITION BY LOWER(LTRIM(RTRIM(v.[CompanyName])))
            ORDER BY v.[Id]
        ) AS [RowNumber]
    FROM [Vendors] v
    WHERE v.[CompanyName] IS NOT NULL AND LTRIM(RTRIM(v.[CompanyName])) <> ''
)
INSERT INTO [VendorCompanies] (
    [Name], [NormalizedName], [CompanyPhone], [Email], [Address], [City], [State], [Zip], [GoogleMapsUrl], [CreatedDate]
)
SELECT
    ranked.[Name],
    ranked.[NormalizedName],
    ranked.[CompanyPhone],
    ranked.[Email],
    ranked.[Address],
    ranked.[City],
    ranked.[State],
    ranked.[Zip],
    ranked.[GoogleMapsUrl],
    GETUTCDATE() AS [CreatedDate]
FROM RankedVendors ranked
WHERE ranked.[RowNumber] = 1;

UPDATE v
SET v.[CompanyId] = vc.[Id]
FROM [Vendors] v
INNER JOIN [VendorCompanies] vc
    ON vc.[NormalizedName] = LOWER(LTRIM(RTRIM(v.[CompanyName])))
WHERE v.[CompanyName] IS NOT NULL AND LTRIM(RTRIM(v.[CompanyName])) <> '';
");

            migrationBuilder.CreateIndex(
                name: "IX_Vendors_CompanyId",
                table: "Vendors",
                column: "CompanyId");

            migrationBuilder.CreateIndex(
                name: "IX_VendorAuditLogs_VendorId",
                table: "VendorAuditLogs",
                column: "VendorId");

            migrationBuilder.CreateIndex(
                name: "IX_VendorCompanies_NormalizedName",
                table: "VendorCompanies",
                column: "NormalizedName",
                unique: true);

            migrationBuilder.AddForeignKey(
                name: "FK_Vendors_VendorCompanies_CompanyId",
                table: "Vendors",
                column: "CompanyId",
                principalTable: "VendorCompanies",
                principalColumn: "Id",
                onDelete: ReferentialAction.Restrict);
        }

        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.DropForeignKey(
                name: "FK_Vendors_VendorCompanies_CompanyId",
                table: "Vendors");

            migrationBuilder.DropIndex(
                name: "IX_Vendors_CompanyId",
                table: "Vendors");

            migrationBuilder.DropIndex(
                name: "IX_VendorAuditLogs_VendorId",
                table: "VendorAuditLogs");

            migrationBuilder.DropIndex(
                name: "IX_VendorCompanies_NormalizedName",
                table: "VendorCompanies");

            migrationBuilder.DropTable(
                name: "VendorAuditLogs");

            migrationBuilder.DropTable(
                name: "VendorCompanies");

            migrationBuilder.DropColumn(
                name: "CompanyId",
                table: "Vendors");

            migrationBuilder.DropColumn(
                name: "PreferredContact",
                table: "Vendors");
        }
    }
}