<?php

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::create('purchase_control_policies', function (Blueprint $table) {
            $table->id();
            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
            $table->foreignId('created_by')->constrained('users')->restrictOnDelete();
            $table->unsignedInteger('revision');
            $table->string('status')->default('pending');
            $table->string('mode');
            $table->boolean('enabled');
            $table->date('valid_from');
            $table->date('valid_until');
            $table->text('reason');
            $table->timestamp('decided_at')->nullable();
            $table->timestamps();
            $table->unique(['tenant_id', 'revision']);
        });
        Schema::create('purchase_control_reviews', function (Blueprint $table) {
            $table->id();
            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
            $table->foreignId('purchase_control_policy_id')->constrained()->restrictOnDelete();
            $table->foreignId('reviewed_by')->constrained('users')->restrictOnDelete();
            $table->string('decision');
            $table->text('reason');
            $table->timestamp('created_at');
            $table->unique(['purchase_control_policy_id', 'reviewed_by']);
        });
        Schema::create('award_cancellations', function (Blueprint $table) {
            $table->id();
            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
            $table->foreignId('purchase_award_id')->unique()->constrained()->restrictOnDelete();
            $table->foreignId('purchase_control_policy_id')->constrained()->restrictOnDelete();
            $table->foreignId('created_by')->constrained('users')->restrictOnDelete();
            $table->foreignId('reviewed_by')->nullable()->constrained('users')->restrictOnDelete();
            $table->string('status')->default('pending');
            $table->string('basis_hash', 64);
            $table->text('reason');
            $table->text('review_reason')->nullable();
            $table->json('snapshot');
            $table->timestamp('reviewed_at')->nullable();
            $table->timestamps();
        });
        Schema::create('purchase_revisions', function (Blueprint $table) {
            $table->id();
            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
            $table->foreignId('award_cancellation_id')->unique()->constrained()->restrictOnDelete();
            $table->foreignId('source_requisition_id')->constrained('requisitions')->restrictOnDelete();
            $table->foreignId('requisition_id')->unique()->constrained()->restrictOnDelete();
            $table->foreignId('created_by')->constrained('users')->restrictOnDelete();
            $table->timestamp('created_at');
        });
    }

    public function down(): void
    {
        throw new LogicException('Preservar políticas, cancelamentos e ligações de revisão.');
    }
};