<?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.economic_clusters (
    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,
    sector text NOT NULL,
    status text NOT NULL,
    metadata jsonb NOT NULL DEFAULT '{}'::jsonb,
    CONSTRAINT imz_economic_clusters_pk PRIMARY KEY (id),
    CONSTRAINT imz_economic_clusters_check_01 CHECK (version_no > 0),
    CONSTRAINT imz_economic_clusters_check_02 CHECK (data_classification IN ('public','internal','confidential','restricted')),
    CONSTRAINT imz_economic_clusters_check_03 CHECK (status IN ('planned','active','inactive'))
);
SQL);

        DB::statement(<<<'SQL'
CREATE TABLE public.value_chains (
    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,
    cluster_id uuid NOT NULL CONSTRAINT imz_value_chains_cluster_id_fk REFERENCES public.economic_clusters(id) ON DELETE CASCADE ON UPDATE CASCADE,
    code text NOT NULL,
    name text NOT NULL,
    stage text NOT NULL,
    CONSTRAINT imz_value_chains_pk PRIMARY KEY (id),
    CONSTRAINT imz_value_chains_check_01 CHECK (version_no > 0),
    CONSTRAINT imz_value_chains_check_02 CHECK (data_classification IN ('public','internal','confidential','restricted')),
    CONSTRAINT imz_value_chains_check_03 CHECK (stage IN ('input','production','processing','logistics','market'))
);
SQL);

        DB::statement(<<<'SQL'
CREATE TABLE public.value_chain_links (
    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,
    from_value_chain_id uuid NOT NULL CONSTRAINT imz_value_chain_links_from_value_chain_id_fk REFERENCES public.value_chains(id) ON DELETE CASCADE ON UPDATE CASCADE,
    to_value_chain_id uuid NOT NULL CONSTRAINT imz_value_chain_links_to_value_chain_id_fk REFERENCES public.value_chains(id) ON DELETE CASCADE ON UPDATE CASCADE,
    link_type text NOT NULL,
    CONSTRAINT imz_value_chain_links_pk PRIMARY KEY (id),
    CONSTRAINT imz_value_chain_links_check_01 CHECK (version_no > 0),
    CONSTRAINT imz_value_chain_links_check_02 CHECK (data_classification IN ('public','internal','confidential','restricted')),
    CONSTRAINT imz_value_chain_links_check_03 CHECK (link_type IN ('supplies','processes','distributes','supports')),
    CONSTRAINT imz_value_chain_links_check_04 CHECK (from_value_chain_id <> to_value_chain_id)
);
SQL);

        DB::statement(<<<'SQL'
CREATE TABLE public.cluster_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,
    cluster_id uuid NOT NULL CONSTRAINT imz_cluster_projects_cluster_id_fk REFERENCES public.economic_clusters(id) ON DELETE CASCADE ON UPDATE CASCADE,
    project_id uuid NOT NULL CONSTRAINT imz_cluster_projects_project_id_fk REFERENCES public.projects(id) ON DELETE CASCADE ON UPDATE CASCADE,
    role text NOT NULL,
    CONSTRAINT imz_cluster_projects_pk PRIMARY KEY (id),
    CONSTRAINT imz_cluster_projects_check_01 CHECK (version_no > 0),
    CONSTRAINT imz_cluster_projects_check_02 CHECK (data_classification IN ('public','internal','confidential','restricted')),
    CONSTRAINT imz_cluster_projects_check_03 CHECK (role IN ('anchor','complementary','supporting'))
);
SQL);

        DB::statement(<<<'SQL'
CREATE TABLE public.anchor_project_links (
    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,
    anchor_project_id uuid NOT NULL CONSTRAINT imz_anchor_project_links_anchor_project_id_fk REFERENCES public.projects(id) ON DELETE CASCADE ON UPDATE CASCADE,
    cluster_id uuid NOT NULL CONSTRAINT imz_anchor_project_links_cluster_id_fk REFERENCES public.economic_clusters(id) ON DELETE CASCADE ON UPDATE CASCADE,
    rationale text NOT NULL,
    CONSTRAINT imz_anchor_project_links_pk PRIMARY KEY (id),
    CONSTRAINT imz_anchor_project_links_check_01 CHECK (version_no > 0),
    CONSTRAINT imz_anchor_project_links_check_02 CHECK (data_classification IN ('public','internal','confidential','restricted'))
);
SQL);

        DB::statement(<<<'SQL'
CREATE TABLE public.complementary_project_links (
    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,
    anchor_project_id uuid NOT NULL CONSTRAINT imz_complementary_project_links_anchor_project_id_fk REFERENCES public.projects(id) ON DELETE CASCADE ON UPDATE CASCADE,
    complementary_project_id uuid NOT NULL CONSTRAINT imz_complementary_project_links_complementary_project_id_fk REFERENCES public.projects(id) ON DELETE CASCADE ON UPDATE CASCADE,
    relation_type text NOT NULL,
    CONSTRAINT imz_complementary_project_links_pk PRIMARY KEY (id),
    CONSTRAINT imz_complementary_project_links_check_01 CHECK (version_no > 0),
    CONSTRAINT imz_complementary_project_links_check_02 CHECK (data_classification IN ('public','internal','confidential','restricted')),
    CONSTRAINT imz_complementary_project_links_check_03 CHECK (relation_type IN ('dependency','enabler','supplier','market')),
    CONSTRAINT imz_complementary_project_links_check_04 CHECK (anchor_project_id<>complementary_project_id)
);
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.complementary_project_links DROP CONSTRAINT IF EXISTS imz_complementary_project_links_anchor_project_id_fk RESTRICT;
SQL);

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

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

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.complementary_project_links DROP CONSTRAINT IF EXISTS imz_complementary_project_links_check_01 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.complementary_project_links DROP CONSTRAINT IF EXISTS imz_complementary_project_links_check_02 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.complementary_project_links DROP CONSTRAINT IF EXISTS imz_complementary_project_links_check_03 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.complementary_project_links DROP CONSTRAINT IF EXISTS imz_complementary_project_links_check_04 RESTRICT;
SQL);

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

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

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

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

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.anchor_project_links DROP CONSTRAINT IF EXISTS imz_anchor_project_links_check_01 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.anchor_project_links DROP CONSTRAINT IF EXISTS imz_anchor_project_links_check_02 RESTRICT;
SQL);

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

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

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

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

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.cluster_projects DROP CONSTRAINT IF EXISTS imz_cluster_projects_check_01 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.cluster_projects DROP CONSTRAINT IF EXISTS imz_cluster_projects_check_02 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.cluster_projects DROP CONSTRAINT IF EXISTS imz_cluster_projects_check_03 RESTRICT;
SQL);

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

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

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

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

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.value_chain_links DROP CONSTRAINT IF EXISTS imz_value_chain_links_check_01 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.value_chain_links DROP CONSTRAINT IF EXISTS imz_value_chain_links_check_02 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.value_chain_links DROP CONSTRAINT IF EXISTS imz_value_chain_links_check_03 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.value_chain_links DROP CONSTRAINT IF EXISTS imz_value_chain_links_check_04 RESTRICT;
SQL);

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

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

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

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.value_chains DROP CONSTRAINT IF EXISTS imz_value_chains_check_01 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.value_chains DROP CONSTRAINT IF EXISTS imz_value_chains_check_02 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.value_chains DROP CONSTRAINT IF EXISTS imz_value_chains_check_03 RESTRICT;
SQL);

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

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

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.economic_clusters DROP CONSTRAINT IF EXISTS imz_economic_clusters_check_01 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.economic_clusters DROP CONSTRAINT IF EXISTS imz_economic_clusters_check_02 RESTRICT;
SQL);

        DB::statement(<<<'SQL'
ALTER TABLE IF EXISTS public.economic_clusters DROP CONSTRAINT IF EXISTS imz_economic_clusters_check_03 RESTRICT;
SQL);

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