<?php

require_once __DIR__ . '/../includes/api_bootstrap.php';
require_once __DIR__ . '/../includes/chore_helpers.php';

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    sendJson(['success' => false, 'error' => 'Method not allowed'], 405);
}

$people = normalizePeopleList(readJsonFile('people.json'));
$actor = requireActivePerson($people);
if (($actor['role'] ?? '') !== ROLE_HEAD || !isHohVerified()) {
    sendJson(['success' => false, 'error' => 'Only a verified Head of household can review chores'], 403);
}

$body = readJsonBody();
$id = isset($body['id']) ? trim((string) $body['id']) : '';
$decision = isset($body['decision']) ? trim((string) $body['decision']) : '';
if ($id === '') {
    sendJson(['success' => false, 'error' => 'id is required'], 400);
}
if (!in_array($decision, ['approve', 'reject'], true)) {
    sendJson(['success' => false, 'error' => 'decision must be approve or reject'], 400);
}

$rawChores = normalizeChoresList(readJsonFile('chores.json'));
$chores = migrateAllChores($rawChores, $people);

$idx = findChoreIndexById($chores, $id);
if ($idx === null) {
    sendJson(['success' => false, 'error' => 'Chore not found'], 404);
}

$row = $chores[$idx];
$pending = $row['pending_submission'] ?? null;
if (!is_array($pending)) {
    sendJson(['success' => false, 'error' => 'Nothing is waiting for approval on this chore'], 400);
}

if ($decision === 'reject') {
    $row['pending_submission'] = null;
    $chores[$idx] = migrateLegacyChoreRow($row, $people);
    if (!writeJsonFile('chores.json', $chores)) {
        sendJson(['success' => false, 'error' => 'Failed to save chores'], 500);
    }
    sendJson(['success' => true]);
}

$assignees = $row['assignee_ids'] ?? [];
if (!is_array($assignees)) {
    $assignees = [];
}
$value = (float) ($row['value'] ?? 0);
$n = count($assignees);
$share = $n > 0 ? round($value / $n, 2) : 0.0;

$row['pending_submission'] = null;

if (($row['schedule'] ?? CHORE_SCHEDULE_ONCE) === CHORE_SCHEDULE_RECURRING) {
    $days = (int) ($row['recurrence_days'] ?? 7);
    $days = max(1, $days);
    $row['due_date'] = gmdate('Y-m-d', time() + ($days * 86400));
    $row['status'] = 'active';
} else {
    $row['status'] = 'completed';
}

$chores[$idx] = migrateLegacyChoreRow($row, $people);

if (!writeJsonFile('chores.json', $chores)) {
    sendJson(['success' => false, 'error' => 'Failed to save chores'], 500);
}

foreach ($people as $pi => $p) {
    $pid = (string) ($p['id'] ?? '');
    if ($pid === '' || !in_array($pid, $assignees, true)) {
        continue;
    }
    $bal = $p['currency_balance'] ?? 0;
    $people[$pi]['currency_balance'] = (is_numeric($bal) ? (float) $bal : 0.0) + $share;
}

if (!writeJsonFile('people.json', $people)) {
    sendJson(['success' => false, 'error' => 'Failed to save people balances'], 500);
}

sendJson(['success' => true, 'credited_each' => $share]);