<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    public function up(): void
    {
        Schema::create('supplier_improvements', function (Blueprint $table) {
            $table->id();
            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
            $table->foreignId('supplier_evaluation_id')->constrained()->restrictOnDelete();
            $table->foreignId('created_by')->constrained('users')->restrictOnDelete();
            $table->foreignId('responsible_id')->constrained('users')->restrictOnDelete();
            $table->uuid('operation_key');
            $table->string('creation_hash', 64);
            $table->string('title', 200);
            $table->text('description');
            $table->date('due_on');
            $table->unsignedInteger('version')->default(1);
            $table->string('status')->default('open');
            $table->json('contributors');
            $table->text('result')->nullable();
            $table->text('evidence')->nullable();
            $table->foreignId('reviewed_by')->nullable()->constrained('users')->restrictOnDelete();
            $table->text('review_reason')->nullable();
            $table->timestamp('reviewed_at')->nullable();
            $table->timestamps();
            $table->unique(['tenant_id', 'operation_key']);
            $table->index(['supplier_evaluation_id', 'status']);
        });
        if (DB::getDriverName() === 'pgsql') {
            DB::unprepared("CREATE FUNCTION sgc_preserve_supplier_improvement() RETURNS trigger LANGUAGE plpgsql AS $$ BEGIN
                IF TG_OP = 'DELETE' OR OLD.status = 'closed' THEN RAISE EXCEPTION 'Preservar medida encerrada e histórico'; END IF;
                RETURN NEW; END $$;
                CREATE TRIGGER preserve_supplier_improvement BEFORE UPDATE OR DELETE ON supplier_improvements FOR EACH ROW EXECUTE FUNCTION sgc_preserve_supplier_improvement();");
        } elseif (DB::getDriverName() === 'sqlite') {
            DB::unprepared("CREATE TRIGGER preserve_supplier_improvement_delete BEFORE DELETE ON supplier_improvements BEGIN SELECT RAISE(ABORT, 'Preservar histórico da medida'); END;");
            DB::unprepared("CREATE TRIGGER preserve_supplier_improvement_closed BEFORE UPDATE ON supplier_improvements WHEN OLD.status = 'closed' BEGIN SELECT RAISE(ABORT, 'Preservar medida encerrada'); END;");
        }
    }

    public function down(): void
    {
        throw new LogicException('Preservar medidas e decisões.');
    }
};