<?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('people_processes', function (Blueprint $table) {
            $table->id();
            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
            $table->foreignId('created_by')->constrained('users')->restrictOnDelete();
            $table->uuid('operation_key');
            $table->string('creation_hash', 64);
            $table->string('kind', 20);
            $table->string('title', 200);
            $table->text('purpose');
            $table->date('closes_on');
            $table->json('rules');
            $table->string('status', 30)->default('draft');
            $table->unsignedInteger('version')->default(1);
            $table->foreignId('opened_by')->nullable()->constrained('users')->restrictOnDelete();
            $table->foreignId('selected_application_id')->nullable();
            $table->json('selection')->nullable();
            $table->foreignId('confirmed_by')->nullable()->constrained('users')->restrictOnDelete();
            $table->json('contract')->nullable();
            $table->timestamps();
            $table->unique(['tenant_id', 'operation_key']);
        });
        Schema::create('people_applications', function (Blueprint $table) {
            $table->id();
            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
            $table->foreignId('people_process_id')->constrained()->restrictOnDelete();
            $table->foreignId('created_by')->constrained('users')->restrictOnDelete();
            $table->uuid('operation_key');
            $table->string('name', 200);
            $table->string('reference', 200);
            $table->text('summary');
            $table->date('received_on');
            $table->timestamps();
            $table->unique(['people_process_id', 'reference']);
            $table->unique(['tenant_id', 'operation_key']);
        });
        Schema::create('people_reviews', function (Blueprint $table) {
            $table->id();
            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
            $table->foreignId('people_application_id')->constrained()->restrictOnDelete();
            $table->foreignId('reviewed_by')->constrained('users')->restrictOnDelete();
            $table->json('answers');
            $table->text('reason');
            $table->unsignedInteger('score_minor');
            $table->timestamps();
            $table->unique(['people_application_id', 'reviewed_by']);
        });
        if (DB::getDriverName() === 'pgsql') {
            DB::unprepared("CREATE FUNCTION sgc_preserve_people_evidence() RETURNS trigger LANGUAGE plpgsql AS $$ BEGIN
                RAISE EXCEPTION 'Preservar candidatura e avaliacao'; END $$;
                CREATE TRIGGER preserve_people_applications BEFORE UPDATE OR DELETE ON people_applications FOR EACH ROW EXECUTE FUNCTION sgc_preserve_people_evidence();
                CREATE TRIGGER preserve_people_reviews BEFORE UPDATE OR DELETE ON people_reviews FOR EACH ROW EXECUTE FUNCTION sgc_preserve_people_evidence();
                CREATE FUNCTION sgc_preserve_people_process() RETURNS trigger LANGUAGE plpgsql AS $$ BEGIN
                IF TG_OP = 'DELETE' OR OLD.status = 'contract_draft' THEN RAISE EXCEPTION 'Preservar processo e minuta'; END IF;
                IF ROW(NEW.tenant_id, NEW.created_by, NEW.kind, NEW.title, NEW.purpose, NEW.closes_on, NEW.rules::text, NEW.operation_key, NEW.creation_hash)
                    IS DISTINCT FROM ROW(OLD.tenant_id, OLD.created_by, OLD.kind, OLD.title, OLD.purpose, OLD.closes_on, OLD.rules::text, OLD.operation_key, OLD.creation_hash)
                    THEN RAISE EXCEPTION 'Preservar regras e ambito do processo'; END IF;
                RETURN NEW; END $$;
                CREATE TRIGGER preserve_people_process BEFORE UPDATE OR DELETE ON people_processes FOR EACH ROW EXECUTE FUNCTION sgc_preserve_people_process();");
        } elseif (DB::getDriverName() === 'sqlite') {
            foreach (['people_applications', 'people_reviews'] as $table) {
                foreach (['UPDATE', 'DELETE'] as $operation) {
                    DB::unprepared("CREATE TRIGGER preserve_{$table}_{$operation} BEFORE {$operation} ON {$table} BEGIN SELECT RAISE(ABORT, 'Preservar evidencias'); END;");
                }
            }
            DB::unprepared("CREATE TRIGGER preserve_people_process_delete BEFORE DELETE ON people_processes BEGIN SELECT RAISE(ABORT, 'Preservar processo'); END;");
            DB::unprepared("CREATE TRIGGER preserve_people_process_update BEFORE UPDATE ON people_processes WHEN OLD.status = 'contract_draft'
                OR NEW.tenant_id IS NOT OLD.tenant_id OR NEW.created_by IS NOT OLD.created_by OR NEW.kind IS NOT OLD.kind OR NEW.title IS NOT OLD.title
                OR NEW.purpose IS NOT OLD.purpose OR NEW.closes_on IS NOT OLD.closes_on OR NEW.rules IS NOT OLD.rules
                OR NEW.operation_key IS NOT OLD.operation_key OR NEW.creation_hash IS NOT OLD.creation_hash
                BEGIN SELECT RAISE(ABORT, 'Preservar regras e processo'); END;");
        }
    }

    public function down(): void
    {
        throw new LogicException('Preservar processos de contratação e evidências.');
    }
};