<?php

use App\Support\LegacyForeignKeys;
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    public function up(): void
    {
        Schema::table('maintenance_overhauls', function (Blueprint $table) {
            if (! Schema::hasColumn('maintenance_overhauls', 'project_id')) {
                $table->unsignedInteger('project_id')->nullable()->after('equipment_id');
                $table->foreign('project_id')->references('id')->on('pjt_projects')->nullOnDelete();
            }
        });

        if (! Schema::hasTable('maintenance_equipment_parts')) {
            Schema::create('maintenance_equipment_parts', function (Blueprint $table) {
                $table->id();
                LegacyForeignKeys::business($table);
                $table->foreignId('equipment_id')->constrained('maintenance_equipment')->cascadeOnDelete();
                $table->foreignId('spare_part_id')->nullable()->constrained('maintenance_spare_parts')->nullOnDelete();
                $table->string('part_name');
                $table->string('part_code')->nullable();
                $table->decimal('quantity', 12, 3)->default(1);
                $table->string('unit')->nullable();
                $table->boolean('is_critical')->default(false);
                $table->text('notes')->nullable();
                $table->timestamps();

                $table->index(['equipment_id', 'spare_part_id'], 'mnt_eq_parts_eq_sp_idx');
            });
        }

        Schema::table('maintenance_checklist_templates', function (Blueprint $table) {
            if (! Schema::hasColumn('maintenance_checklist_templates', 'equipment_id')) {
                $table->foreignId('equipment_id')->nullable()->after('equipment_category_id')
                    ->constrained('maintenance_equipment')->nullOnDelete();
            }
        });

        Schema::table('maintenance_checklist_items', function (Blueprint $table) {
            if (! Schema::hasColumn('maintenance_checklist_items', 'spare_part_id')) {
                $table->foreignId('spare_part_id')->nullable()->after('template_id')
                    ->constrained('maintenance_spare_parts')->nullOnDelete();
            }
            if (! Schema::hasColumn('maintenance_checklist_items', 'equipment_part_id')) {
                $table->foreignId('equipment_part_id')->nullable()->after('spare_part_id')
                    ->constrained('maintenance_equipment_parts')->nullOnDelete();
            }
        });
    }

    public function down(): void
    {
        Schema::table('maintenance_checklist_items', function (Blueprint $table) {
            if (Schema::hasColumn('maintenance_checklist_items', 'equipment_part_id')) {
                $table->dropConstrainedForeignId('equipment_part_id');
            }
            if (Schema::hasColumn('maintenance_checklist_items', 'spare_part_id')) {
                $table->dropConstrainedForeignId('spare_part_id');
            }
        });

        Schema::table('maintenance_checklist_templates', function (Blueprint $table) {
            if (Schema::hasColumn('maintenance_checklist_templates', 'equipment_id')) {
                $table->dropConstrainedForeignId('equipment_id');
            }
        });

        Schema::dropIfExists('maintenance_equipment_parts');

        Schema::table('maintenance_overhauls', function (Blueprint $table) {
            if (Schema::hasColumn('maintenance_overhauls', 'project_id')) {
                $table->dropConstrainedForeignId('project_id');
            }
        });
    }
};