-- pgTAP: auto-promote oldest member when sole admin leaves — B-13 (RN-10)
-- Run with: psql -U postgres -d postgres -f supabase/tests/003_promote_on_admin_leave.sql
--
-- The trigger fires on DELETE FROM public.users (user account deletion).
-- We use a synthetic test user so we don't disturb seed data. The collective
-- is created by Borja (created_by), so deleting the test admin user doesn't
-- hit the ON DELETE RESTRICT on collectives.created_by.

CREATE EXTENSION IF NOT EXISTS pgtap;

BEGIN;
SELECT plan(3);

-- ── Setup ─────────────────────────────────────────────────────────────────────
-- Use UUIDs outside the seed range (e9...) to avoid collisions.
INSERT INTO public.users (id, email, display_name, language, avatar_type)
VALUES ('e9999999-9999-9999-9999-999999999999', 'promote-test@local', 'Promote Admin', 'es', 'initials')
ON CONFLICT (id) DO NOTHING;

-- Collective owned (created_by) by Borja so the admin-user delete won't be
-- blocked by ON DELETE RESTRICT on collectives.created_by.
INSERT INTO public.collectives (id, name, emoji, created_by)
VALUES ('dddddddd-dddd-dddd-dddd-dddddddddddd',
        'Promote test collective', '🔄',
        '22222222-2222-2222-2222-222222222222')
ON CONFLICT (id) DO NOTHING;

-- Two members: synthetic admin (to be deleted) and Ana as the oldest member.
INSERT INTO public.collective_members (collective_id, user_id, role, joined_at)
VALUES
    ('dddddddd-dddd-dddd-dddd-dddddddddddd',
     'e9999999-9999-9999-9999-999999999999', 'admin',  now() - INTERVAL '10 days'),
    ('dddddddd-dddd-dddd-dddd-dddddddddddd',
     '11111111-1111-1111-1111-111111111111', 'member', now() - INTERVAL '5 days')
ON CONFLICT (collective_id, user_id) DO NOTHING;

-- B-13a: Initial state — one admin
SELECT is(
    (SELECT COUNT(*)::integer FROM public.collective_members
     WHERE collective_id = 'dddddddd-dddd-dddd-dddd-dddddddddddd'
     AND role = 'admin'),
    1,
    'B-13a: initially one admin in the test collective'
);

-- ── Fire the trigger: delete the sole admin user ──────────────────────────────
-- Trigger `promote_on_admin_leave` fires BEFORE DELETE on public.users and
-- promotes the oldest remaining member (Ana) before the delete cascade removes
-- the admin's collective_members row.
DELETE FROM public.users
WHERE id = 'e9999999-9999-9999-9999-999999999999';

-- B-13b: Ana (oldest remaining) must now be admin
SELECT results_eq(
    $$ SELECT role::text FROM public.collective_members
       WHERE collective_id = 'dddddddd-dddd-dddd-dddd-dddddddddddd'
       AND   user_id       = '11111111-1111-1111-1111-111111111111' $$,
    $$ VALUES ('admin') $$,
    'B-13b: oldest member auto-promoted to admin when sole admin leaves'
);

-- B-13c: Exactly one admin after promotion
SELECT is(
    (SELECT COUNT(*)::integer FROM public.collective_members
     WHERE collective_id = 'dddddddd-dddd-dddd-dddd-dddddddddddd'
     AND role = 'admin'),
    1,
    'B-13c: exactly one admin after promotion'
);

SELECT * FROM finish();
ROLLBACK;