/**
 * SA-series: Server administration RPCs + audit log + server-layer
 * section visibility (Fase 13.5.1).
 *
 *   SA-01 admin_list_collectives returns rows for an admin; rejected for a
 *         non-admin user (P0001 'forbidden').
 *   SA-02 admin_soft_delete_collective writes an admin_actions row; the
 *         collective is flipped to deleted_at IS NOT NULL.
 *   SA-03 admin_restore_collective clears deleted_at + writes audit.
 *   SA-04 admin_hard_delete_collective: blocked when deleted_at IS NULL OR
 *         < 30 days old; allowed with p_force=true; cascade removes the
 *         dependent rows (collective_members, shopping_lists, etc.) without
 *         touching public.users.
 *   SA-05 admin_remove_member kicks the user, writes audit.
 *   SA-06 admin_set_default_section writes server_settings + audit.
 *   SA-07 grant_server_admin / revoke_server_admin; last-admin guard fires.
 *   SA-08 section_enabled() precedence: server > collective > user > default.
 *   SA-09 non-admin cannot SELECT admin_actions (RLS).
 *   SA-10 non-admin cannot SELECT server_admins beyond their own row (RLS).
 */
import { describe, it, expect, afterAll, beforeEach } from 'vitest';
import { createClientAs, createAdminClient } from '../src/supabase-clients.js';
import { sql, closePool } from '../src/db-helpers.js';
import {
	ANA_ID,
	BORJA_ID,
	CARMEN_ID,
	DAVID_ID,
	COLLECTIVE_ID
} from '../src/seed-constants.js';

const admin = createAdminClient();

// Tracker so we can clean up anything we create. Ana is always the seed admin
// (see supabase/seed.sql); Borja and others may be promoted in some tests and
// must be demoted before the suite exits or other tests' assumptions break.
const promotedNonSeed: string[] = [];
const createdCollectiveIds: string[] = [];

afterAll(async () => {
	// Demote anyone we promoted, leaving Ana as the only seed admin.
	if (promotedNonSeed.length) {
		await sql('DELETE FROM public.server_admins WHERE user_id = ANY($1::uuid[])', [
			promotedNonSeed
		]);
	}
	// Best-effort: drop any collectives we created.
	if (createdCollectiveIds.length) {
		await sql('DELETE FROM public.collectives WHERE id = ANY($1::uuid[])', [
			createdCollectiveIds
		]);
	}
	// Reset section flags + server settings.
	await sql(`UPDATE public.users SET feature_flags = '{}'::jsonb`);
	await sql(`UPDATE public.collectives SET feature_flags = '{}'::jsonb WHERE deleted_at IS NULL`);
	await sql(`UPDATE public.collectives SET deleted_at = NULL`);
	await sql(`UPDATE public.server_settings SET value = '{}'::jsonb WHERE key = 'default_sections'`);
	// Trim audit log to keep the dev DB tidy across re-runs.
	await sql(`DELETE FROM public.admin_actions WHERE actor_id = ANY($1::uuid[])`, [
		[ANA_ID, BORJA_ID, CARMEN_ID]
	]);
	await closePool();
});

beforeEach(async () => {
	// Always restore the seed admin to a clean state.
	await sql('INSERT INTO public.server_admins (user_id) VALUES ($1) ON CONFLICT DO NOTHING', [
		ANA_ID
	]);
	// Demote any non-seed admins between tests so SA-07 starts from "Ana only".
	if (promotedNonSeed.length) {
		await sql('DELETE FROM public.server_admins WHERE user_id = ANY($1::uuid[])', [
			promotedNonSeed
		]);
		promotedNonSeed.length = 0;
	}
	// Reset audit + settings so per-test row counts are deterministic.
	await sql(`UPDATE public.collectives SET deleted_at = NULL`);
	await sql(`UPDATE public.users SET feature_flags = '{}'::jsonb`);
	await sql(`UPDATE public.collectives SET feature_flags = '{}'::jsonb WHERE deleted_at IS NULL`);
	await sql(`UPDATE public.server_settings SET value = '{}'::jsonb WHERE key = 'default_sections'`);
	await sql(`DELETE FROM public.admin_actions`);
});

async function makeThrowawayCollective(name: string, creator = ANA_ID): Promise<string> {
	const r = await sql(
		`INSERT INTO public.collectives (name, emoji, created_by) VALUES ($1, '🧪', $2) RETURNING id`,
		[name, creator]
	);
	const id = r.rows[0].id as string;
	createdCollectiveIds.push(id);
	await sql(
		`INSERT INTO public.collective_members (collective_id, user_id, role) VALUES ($1, $2, 'admin')`,
		[id, creator]
	);
	return id;
}

describe('Server admin RPCs', () => {
	it('SA-01: admin_list_collectives returns rows for admin; forbidden for non-admin', async () => {
		const ana = await createClientAs(ANA_ID);
		const ok = await ana.rpc('admin_list_collectives', { p_search: null, p_limit: 50 });
		expect(ok.error).toBeNull();
		expect(Array.isArray(ok.data)).toBe(true);
		expect((ok.data ?? []).length).toBeGreaterThan(0);

		const borja = await createClientAs(BORJA_ID);
		const denied = await borja.rpc('admin_list_collectives', { p_search: null, p_limit: 50 });
		expect(denied.error?.code).toBe('P0001');
		expect(denied.error?.message).toMatch(/forbidden/i);
	});

	it('SA-02: admin_soft_delete_collective sets deleted_at + writes audit', async () => {
		const cid = await makeThrowawayCollective('SA-02 throwaway');

		const ana = await createClientAs(ANA_ID);
		const { error } = await ana.rpc('admin_soft_delete_collective', {
			p_collective_id: cid,
			p_reason: 'cleanup'
		});
		expect(error).toBeNull();

		const after = await sql('SELECT deleted_at FROM public.collectives WHERE id = $1', [cid]);
		expect(after.rows[0].deleted_at).not.toBeNull();

		const audit = await sql(
			`SELECT action, target_id, payload FROM public.admin_actions
			 WHERE action = 'soft_delete_collective' AND target_id = $1`,
			[cid]
		);
		expect(audit.rows).toHaveLength(1);
		expect(audit.rows[0].payload.reason).toBe('cleanup');
	});

	it('SA-03: admin_restore_collective clears deleted_at + writes audit', async () => {
		const cid = await makeThrowawayCollective('SA-03 throwaway');
		await sql('UPDATE public.collectives SET deleted_at = now() WHERE id = $1', [cid]);

		const ana = await createClientAs(ANA_ID);
		const { error } = await ana.rpc('admin_restore_collective', { p_collective_id: cid });
		expect(error).toBeNull();

		const after = await sql('SELECT deleted_at FROM public.collectives WHERE id = $1', [cid]);
		expect(after.rows[0].deleted_at).toBeNull();

		const audit = await sql(
			`SELECT count(*)::int FROM public.admin_actions
			 WHERE action = 'restore_collective' AND target_id = $1`,
			[cid]
		);
		expect(audit.rows[0].count).toBe(1);
	});

	it('SA-04: admin_hard_delete_collective is guarded by recency + cascade is non-destructive to users', async () => {
		const cid = await makeThrowawayCollective('SA-04 throwaway');
		const ana = await createClientAs(ANA_ID);

		// Without soft-delete first: not_soft_deleted.
		const r1 = await ana.rpc('admin_hard_delete_collective', { p_collective_id: cid, p_force: false });
		expect(r1.error?.message).toMatch(/not_soft_deleted/);

		// After a fresh soft-delete: too_recent.
		await sql('UPDATE public.collectives SET deleted_at = now() WHERE id = $1', [cid]);
		const r2 = await ana.rpc('admin_hard_delete_collective', { p_collective_id: cid, p_force: false });
		expect(r2.error?.message).toMatch(/too_recent/);

		// Add some satellite rows that should cascade away cleanly.
		await sql(
			`INSERT INTO public.shopping_lists (collective_id, name, status, created_by)
			 VALUES ($1, 'SA-04 list', 'active', $2) RETURNING id`,
			[cid, ANA_ID]
		);

		// User row count snapshot — must be unchanged after hard delete.
		const usersBefore = await sql('SELECT count(*)::int FROM public.users');

		// With force=true: succeeds.
		const r3 = await ana.rpc('admin_hard_delete_collective', { p_collective_id: cid, p_force: true });
		expect(r3.error).toBeNull();

		const gone = await sql('SELECT count(*)::int FROM public.collectives WHERE id = $1', [cid]);
		expect(gone.rows[0].count).toBe(0);

		const listsGone = await sql(
			'SELECT count(*)::int FROM public.shopping_lists WHERE collective_id = $1',
			[cid]
		);
		expect(listsGone.rows[0].count).toBe(0);

		const usersAfter = await sql('SELECT count(*)::int FROM public.users');
		expect(usersAfter.rows[0].count).toBe(usersBefore.rows[0].count);

		const audit = await sql(
			`SELECT payload FROM public.admin_actions
			 WHERE action = 'hard_delete_collective' AND target_id = $1`,
			[cid]
		);
		expect(audit.rows).toHaveLength(1);
		expect(audit.rows[0].payload.force).toBe(true);
		expect(audit.rows[0].payload.name_snapshot).toBe('SA-04 throwaway');
	});

	it('SA-05: admin_remove_member removes the membership and writes audit', async () => {
		// Add Carmen to a throwaway collective so we can kick her without
		// disturbing the seed Casa García-López membership.
		const cid = await makeThrowawayCollective('SA-05 throwaway');
		await sql(
			`INSERT INTO public.collective_members (collective_id, user_id, role)
			 VALUES ($1, $2, 'member')`,
			[cid, CARMEN_ID]
		);

		const ana = await createClientAs(ANA_ID);
		const { error } = await ana.rpc('admin_remove_member', {
			p_collective_id: cid,
			p_user: CARMEN_ID,
			p_reason: 'spam'
		});
		expect(error).toBeNull();

		const after = await sql(
			`SELECT count(*)::int FROM public.collective_members
			 WHERE collective_id = $1 AND user_id = $2`,
			[cid, CARMEN_ID]
		);
		expect(after.rows[0].count).toBe(0);

		const audit = await sql(
			`SELECT payload FROM public.admin_actions
			 WHERE action = 'remove_member' AND target_id = $1`,
			[cid]
		);
		expect(audit.rows).toHaveLength(1);
		expect(audit.rows[0].payload.user_id).toBe(CARMEN_ID);
		expect(audit.rows[0].payload.reason).toBe('spam');
	});

	it('SA-06: admin_set_default_section patches server_settings + writes audit; unknown section is rejected', async () => {
		const ana = await createClientAs(ANA_ID);

		const ok = await ana.rpc('admin_set_default_section', {
			p_section: 'notes',
			p_enabled: false
		});
		expect(ok.error).toBeNull();

		const row = await sql(
			`SELECT value FROM public.server_settings WHERE key = 'default_sections'`
		);
		expect(row.rows[0].value.notes).toBe(false);

		const bad = await ana.rpc('admin_set_default_section', {
			p_section: 'definitely_not_a_section',
			p_enabled: true
		});
		expect(bad.error?.message).toMatch(/unknown_section/);

		const audit = await sql(
			`SELECT count(*)::int FROM public.admin_actions
			 WHERE action = 'set_default_section'`
		);
		expect(audit.rows[0].count).toBe(1);
	});

	it('SA-07: grant_server_admin + revoke_server_admin + last-admin guard', async () => {
		const ana = await createClientAs(ANA_ID);

		// Promote Borja.
		const promote = await ana.rpc('grant_server_admin', { p_user: BORJA_ID });
		expect(promote.error).toBeNull();
		promotedNonSeed.push(BORJA_ID);

		const after = await sql(
			'SELECT count(*)::int FROM public.server_admins WHERE user_id = $1',
			[BORJA_ID]
		);
		expect(after.rows[0].count).toBe(1);

		// Revoke Borja — succeeds (Ana still remains).
		const revoke = await ana.rpc('revoke_server_admin', { p_user: BORJA_ID });
		expect(revoke.error).toBeNull();
		// Pop because revoke removed it cleanly.
		promotedNonSeed.pop();

		// Last-admin guard: Ana tries to revoke herself when she is the sole admin.
		const selfRevoke = await ana.rpc('revoke_server_admin', { p_user: ANA_ID });
		expect(selfRevoke.error?.code).toBe('P0003');
		expect(selfRevoke.error?.message).toMatch(/last_admin/);

		// Sanity: Ana still admin.
		const still = await sql(
			'SELECT count(*)::int FROM public.server_admins WHERE user_id = $1',
			[ANA_ID]
		);
		expect(still.rows[0].count).toBe(1);

		// Audit: 1 grant + 1 revoke. (The denied self-revoke should NOT have logged.)
		const audit = await sql(
			`SELECT action FROM public.admin_actions
			 WHERE action IN ('grant_server_admin', 'revoke_server_admin')
			 ORDER BY created_at`
		);
		expect(audit.rows.map((r) => r.action)).toEqual([
			'grant_server_admin',
			'revoke_server_admin'
		]);
	});

	it('SA-08: section_enabled precedence — server > collective > user > default', async () => {
		const borja = await createClientAs(BORJA_ID);

		// Layer 1: server ON → returns true regardless of lower layers being OFF.
		await sql(
			`UPDATE public.server_settings SET value = '{"tasks": true}'::jsonb WHERE key = 'default_sections'`
		);
		await sql(`UPDATE public.collectives SET feature_flags = '{"tasks": false}'::jsonb WHERE id = $1`, [
			COLLECTIVE_ID
		]);
		await sql(`UPDATE public.users SET feature_flags = '{"tasks": false}'::jsonb WHERE id = $1`, [
			BORJA_ID
		]);

		const layer1 = await borja.rpc('section_enabled', {
			p_section: 'tasks',
			p_user: BORJA_ID,
			p_collective: COLLECTIVE_ID
		});
		expect(layer1.error).toBeNull();
		expect(layer1.data).toBe(true);

		// Layer 2: server absent → collective wins (OFF).
		await sql(`UPDATE public.server_settings SET value = '{}'::jsonb WHERE key = 'default_sections'`);
		const layer2 = await borja.rpc('section_enabled', {
			p_section: 'tasks',
			p_user: BORJA_ID,
			p_collective: COLLECTIVE_ID
		});
		expect(layer2.data).toBe(false);

		// Layer 3: server + collective absent → user wins (OFF).
		await sql(`UPDATE public.collectives SET feature_flags = '{}'::jsonb WHERE id = $1`, [
			COLLECTIVE_ID
		]);
		const layer3 = await borja.rpc('section_enabled', {
			p_section: 'tasks',
			p_user: BORJA_ID,
			p_collective: COLLECTIVE_ID
		});
		expect(layer3.data).toBe(false);

		// Layer 4: everyone absent → default true.
		await sql(`UPDATE public.users SET feature_flags = '{}'::jsonb WHERE id = $1`, [BORJA_ID]);
		const layer4 = await borja.rpc('section_enabled', {
			p_section: 'tasks',
			p_user: BORJA_ID,
			p_collective: COLLECTIVE_ID
		});
		expect(layer4.data).toBe(true);
	});

	it('SA-09: non-admin cannot SELECT admin_actions (RLS)', async () => {
		// Generate one audit row so there is something to maybe-leak.
		const cid = await makeThrowawayCollective('SA-09 throwaway');
		const ana = await createClientAs(ANA_ID);
		await ana.rpc('admin_soft_delete_collective', { p_collective_id: cid, p_reason: 'sa-09' });

		const borja = await createClientAs(BORJA_ID);
		const { data, error } = await borja
			.from('admin_actions')
			.select('id, action, target_id')
			.limit(10);
		expect(error).toBeNull(); // RLS returns empty, not an error
		expect(data ?? []).toHaveLength(0);

		// Sanity: Ana (admin) can SELECT.
		const { data: anaData } = await ana
			.from('admin_actions')
			.select('id, action')
			.eq('action', 'soft_delete_collective');
		expect((anaData ?? []).length).toBeGreaterThan(0);
	});

	it('SA-10: non-admin sees only their own row in server_admins', async () => {
		// Promote Carmen temporarily so server_admins has 2 rows.
		await sql('INSERT INTO public.server_admins (user_id) VALUES ($1) ON CONFLICT DO NOTHING', [
			CARMEN_ID
		]);
		promotedNonSeed.push(CARMEN_ID);

		// Borja (not an admin): sees nothing because no row matches user_id = auth.uid()
		// and the EXISTS branch (server admin) is false.
		const borja = await createClientAs(BORJA_ID);
		const { data: borjaRows } = await borja.from('server_admins').select('user_id');
		expect(borjaRows ?? []).toHaveLength(0);

		// David (also not admin) likewise.
		const david = await createClientAs(DAVID_ID);
		const { data: davidRows } = await david.from('server_admins').select('user_id');
		expect(davidRows ?? []).toHaveLength(0);

		// Carmen (admin via promotion): sees all rows.
		const carmen = await createClientAs(CARMEN_ID);
		const { data: carmenRows } = await carmen.from('server_admins').select('user_id');
		expect((carmenRows ?? []).length).toBeGreaterThanOrEqual(2);
	});
});