<?php

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

return new class extends Migration
{
    // Laravel's migration ledger provides idempotency; object drift fails explicitly.
    public function up(): void
    {
        if (DB::connection()->getDriverName() !== 'pgsql') {
            throw new RuntimeException('InvestMoz requires PostgreSQL with PostGIS. Use the isolated pgsql test environment.');
        }

        DB::statement(<<<'SQL'
CREATE TABLE public.documents (
    id uuid DEFAULT gen_random_uuid() NOT NULL,
    source_system text NOT NULL DEFAULT 'investmoz',
    external_id text,
    version_no integer NOT NULL DEFAULT 1,
    data_classification text NOT NULL DEFAULT 'internal',
    correlation_id uuid,
    created_at timestamptz NOT NULL DEFAULT now(),
    updated_at timestamptz NOT NULL DEFAULT now(),
    deleted_at timestamptz,
    file_name text NOT NULL,
    media_type text NOT NULL,
    storage_key text NOT NULL,
    sha256 char(64) NOT NULL,
    status text NOT NULL,
    CONSTRAINT imz_documents_pk PRIMARY KEY (id),
    CONSTRAINT imz_documents_check_01 CHECK (version_no > 0),
    CONSTRAINT imz_documents_check_02 CHECK (data_classification IN ('public','internal','confidential','restricted')),
    CONSTRAINT imz_documents_check_03 CHECK (status IN ('active','quarantined','deleted')),
    CONSTRAINT imz_documents_check_04 CHECK (sha256 ~ '^[0-9a-f]{64}$')
);
SQL);
    }

    public function down(): void
    {
        if (DB::connection()->getDriverName() !== 'pgsql') {
            throw new RuntimeException('InvestMoz rollback requires PostgreSQL.');
        }

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.documents DROP CONSTRAINT IF EXISTS imz_documents_pk RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.documents DROP CONSTRAINT IF EXISTS imz_documents_check_01 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.documents DROP CONSTRAINT IF EXISTS imz_documents_check_02 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.documents DROP CONSTRAINT IF EXISTS imz_documents_check_03 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.documents DROP CONSTRAINT IF EXISTS imz_documents_check_04 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
DROP TABLE IF EXISTS public.documents RESTRICT;
SQL);
    }
};