<?php
// Explicitly called by disposable/new QA setup only, never registered in host migrations.
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
use Illuminate\Support\Facades\DB;
$db=DB::connection();
if($db->getDriverName()!=='pgsql'||!preg_match('/^(compras_receipts_test_|payable_sgf_)[a-f0-9]{12}$/D',$db->getDatabaseName())||$db->selectOne('select current_database() as d')->d!==$db->getDatabaseName())throw new LogicException('Payables schema refused outside isolated QA.');
$scope=function(Blueprint $t){foreach(['tenant_id','company_id','unit_id'] as $k)$t->unsignedBigInteger($k);};
Schema::create('pa_access',function(Blueprint $t)use($scope){$t->id();$scope($t);$t->unsignedBigInteger('user_id');$t->string('person');$t->string('action');$t->unique(['tenant_id','company_id','unit_id','user_id','action']);});
Schema::create('pa_sources',function(Blueprint $t)use($scope){$t->id();$scope($t);$t->string('source_key',64)->unique();$t->unsignedBigInteger('local_source_id');$t->timestamp('created_at');});
Schema::create('pa_proposals',function(Blueprint $t)use($scope){$t->id();$scope($t);$t->foreignId('source_id')->constrained('pa_sources');$t->string('source_revision',64);$t->integer('capture_version');$t->jsonb('snapshot');$t->jsonb('missing');$t->unsignedBigInteger('prepared_by');$t->string('prepared_person');$t->text('reason');$t->timestamp('created_at');$t->unique(['source_id','capture_version']);});
Schema::create('pa_obligations',function(Blueprint $t)use($scope){$t->id();$scope($t);$t->foreignId('source_id')->unique()->constrained('pa_sources');$t->foreignId('proposal_id')->constrained('pa_proposals');$t->string('source_revision',64);$t->bigInteger('principal_minor');$t->string('currency',3);$t->date('due_on')->nullable();$t->unsignedBigInteger('recognised_by');$t->string('recognised_person');$t->text('reason');$t->timestamp('created_at');});
Schema::create('pa_commands',function(Blueprint $t)use($scope){$t->id();$scope($t);$t->unsignedBigInteger('actor_id');$t->uuid('command_key');$t->string('request_hash',64);$t->jsonb('result');$t->timestamp('created_at');$t->unique(['tenant_id','company_id','unit_id','actor_id','command_key']);});
Schema::create('pa_events',function(Blueprint $t)use($scope){$t->id();$scope($t);$t->foreignId('source_id')->constrained('pa_sources');$t->unsignedBigInteger('actor_id');$t->string('kind');$t->jsonb('payload');$t->timestamp('created_at');});
Schema::create('pa_outbox',function(Blueprint $t){$t->foreignId('event_id')->primary()->constrained('pa_events');$t->string('state');});
DB::unprepared("CREATE FUNCTION pa_append_only() RETURNS trigger LANGUAGE plpgsql AS $$ BEGIN RAISE EXCEPTION 'PA_APPEND_ONLY'; END $$");
foreach(['pa_sources','pa_proposals','pa_obligations','pa_events','pa_outbox','pa_commands'] as $t)DB::unprepared("CREATE TRIGGER pa_history_immutable BEFORE UPDATE OR DELETE ON {$t} FOR EACH ROW EXECUTE FUNCTION pa_append_only()");