<?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.projects (
    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,
    code text NOT NULL,
    name text NOT NULL,
    status text NOT NULL,
    description text,
    budget_amount numeric(20,2),
    budget_currency char(3),
    start_date date,
    end_date date,
    metadata jsonb NOT NULL DEFAULT '{}'::jsonb,
    CONSTRAINT imz_projects_pk PRIMARY KEY (id),
    CONSTRAINT imz_projects_check_01 CHECK (version_no > 0),
    CONSTRAINT imz_projects_check_02 CHECK (data_classification IN ('public','internal','confidential','restricted')),
    CONSTRAINT imz_projects_check_03 CHECK (status IN ('draft','planned','active','suspended','completed','cancelled')),
    CONSTRAINT imz_projects_check_04 CHECK (budget_amount IS NULL OR budget_amount >= 0),
    CONSTRAINT imz_projects_check_05 CHECK (end_date IS NULL OR start_date IS NULL OR end_date >= start_date),
    CONSTRAINT imz_projects_check_06 CHECK ((budget_amount IS NULL) = (budget_currency IS NULL)),
    CONSTRAINT imz_projects_check_07 CHECK (budget_currency IS NULL OR budget_currency ~ '^[A-Z]{3}$')
);
SQL);

        DB::statement(<<<'SQL'
CREATE TABLE public.project_locations (
    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,
    project_id uuid NOT NULL CONSTRAINT imz_project_locations_project_id_fk REFERENCES public.projects(id) ON DELETE CASCADE ON UPDATE CASCADE,
    geo_location_id uuid NOT NULL CONSTRAINT imz_project_locations_geo_location_id_fk REFERENCES public.geo_locations(id) ON DELETE RESTRICT ON UPDATE CASCADE,
    role text NOT NULL,
    CONSTRAINT imz_project_locations_pk PRIMARY KEY (id),
    CONSTRAINT imz_project_locations_check_01 CHECK (version_no > 0),
    CONSTRAINT imz_project_locations_check_02 CHECK (data_classification IN ('public','internal','confidential','restricted')),
    CONSTRAINT imz_project_locations_check_03 CHECK (role IN ('primary','secondary','impact'))
);
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.project_locations DROP CONSTRAINT IF EXISTS imz_project_locations_project_id_fk RESTRICT;
SQL);

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

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

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.project_locations DROP CONSTRAINT IF EXISTS imz_project_locations_check_01 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.project_locations DROP CONSTRAINT IF EXISTS imz_project_locations_check_02 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.project_locations DROP CONSTRAINT IF EXISTS imz_project_locations_check_03 RESTRICT;
SQL);

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

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

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.projects DROP CONSTRAINT IF EXISTS imz_projects_check_01 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.projects DROP CONSTRAINT IF EXISTS imz_projects_check_02 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.projects DROP CONSTRAINT IF EXISTS imz_projects_check_03 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.projects DROP CONSTRAINT IF EXISTS imz_projects_check_04 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.projects DROP CONSTRAINT IF EXISTS imz_projects_check_05 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.projects DROP CONSTRAINT IF EXISTS imz_projects_check_06 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.projects DROP CONSTRAINT IF EXISTS imz_projects_check_07 RESTRICT;
SQL);

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