<?php
/**
 * 家庭名册（家庭成员 + 将来的外部联系人共用一张表）。
 *
 * 之所以不拆成两张表：两者字段几乎一样；而且需要互相转换 ——
 * 一个「认识的人」随时可能变成家庭成员，一个家庭成员也可能只作为联系人存在。
 */

declare(strict_types=1);

namespace App;

final class Person
{
    /** 名册列表（连带账号信息，用于显示「是否已开通登录」） */
    public static function all(int $familyId, string $q = '', string $kind = 'member'): array
    {
        $sql = 'SELECT p.*, a.id AS account_id, a.role AS account_role, a.status AS account_status,
                       a.last_login_at
                FROM persons p
                LEFT JOIN accounts a ON a.person_id = p.id
                WHERE p.family_id = ? AND p.kind = ?';
        $args = [$familyId, $kind];
        if ($q !== '') {
            $sql .= ' AND (p.name LIKE ? OR p.nickname LIKE ? OR p.email LIKE ?)';
            $like = '%' . $q . '%';
            $args[] = $like;
            $args[] = $like;
            $args[] = $like;
        }
        $sql .= ' ORDER BY p.sort_order ASC, p.id ASC';
        $st = Database::get()->prepare($sql);
        $st->execute($args);
        return $st->fetchAll();
    }

    public static function find(int $id): ?array
    {
        $st = Database::get()->prepare('SELECT * FROM persons WHERE id = ?');
        $st->execute([$id]);
        $row = $st->fetch();
        return $row ?: null;
    }

    /** 带账号信息的详情（详情页用） */
    public static function findWithAccount(int $id): ?array
    {
        $st = Database::get()->prepare(
            'SELECT p.*, a.id AS account_id, a.role AS account_role,
                    a.status AS account_status, a.last_login_at
             FROM persons p LEFT JOIN accounts a ON a.person_id = p.id
             WHERE p.id = ?'
        );
        $st->execute([$id]);
        $row = $st->fetch();
        return $row ?: null;
    }

    public static function findByPhoneHash(string $hash): ?array
    {
        $st = Database::get()->prepare('SELECT * FROM persons WHERE phone_hash = ? LIMIT 1');
        $st->execute([$hash]);
        $row = $st->fetch();
        return $row ?: null;
    }

    /**
     * 新增。手机号是敏感字段，进来就加密 + 哈希。
     * @return int 新 id
     */
    public static function create(int $familyId, array $d): int
    {
        $phone = $d['phone'] ?? '';
        $sql = 'INSERT INTO persons
                (family_id, kind, name, nickname, gender, birth_rank, birthday, avatar,
                 phone_hash, phone_encrypted, id_card_encrypted, email, address, note,
                 is_placeholder, sort_order)
                VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)';
        $st = Database::get()->prepare($sql);
        $st->execute([
            $familyId,
            $d['kind'] ?? 'member',
            $d['name'],
            $d['nickname'] !== '' ? $d['nickname'] : null,
            $d['gender'] !== '' ? $d['gender'] : null,
            !empty($d['birth_rank']) ? (int)$d['birth_rank'] : null,
            $d['birthday'] !== '' ? $d['birthday'] : null,
            $d['avatar'] !== '' ? $d['avatar'] : null,
            $phone !== '' ? Crypto::hash($phone) : null,
            $phone !== '' ? Crypto::encrypt($phone) : null,
            ($d['id_card'] ?? '') !== '' ? Crypto::encrypt($d['id_card']) : null,
            $d['email'] !== '' ? $d['email'] : null,
            $d['address'] !== '' ? $d['address'] : null,
            $d['note'] !== '' ? $d['note'] : null,
            !empty($d['is_placeholder']) ? 1 : 0,
            (int)($d['sort_order'] ?? 1000),
        ]);
        return (int)Database::get()->lastInsertId();
    }

    public static function update(int $id, array $d): void
    {
        $phone = $d['phone'] ?? '';
        $sql = 'UPDATE persons SET
                  name = ?, nickname = ?, gender = ?, birth_rank = ?, birthday = ?, avatar = ?,
                  phone_hash = ?, phone_encrypted = ?, id_card_encrypted = ?,
                  email = ?, address = ?, note = ?, is_placeholder = ?, sort_order = ?
                WHERE id = ?';
        Database::get()->prepare($sql)->execute([
            $d['name'],
            $d['nickname'] !== '' ? $d['nickname'] : null,
            $d['gender'] !== '' ? $d['gender'] : null,
            !empty($d['birth_rank']) ? (int)$d['birth_rank'] : null,
            $d['birthday'] !== '' ? $d['birthday'] : null,
            $d['avatar'] !== '' ? $d['avatar'] : null,
            $phone !== '' ? Crypto::hash($phone) : null,
            $phone !== '' ? Crypto::encrypt($phone) : null,
            ($d['id_card'] ?? '') !== '' ? Crypto::encrypt($d['id_card']) : null,
            $d['email'] !== '' ? $d['email'] : null,
            $d['address'] !== '' ? $d['address'] : null,
            $d['note'] !== '' ? $d['note'] : null,
            !empty($d['is_placeholder']) ? 1 : 0,
            (int)($d['sort_order'] ?? 1000),
            $id,
        ]);
    }

    /** 只改头像（上传后单独调用，避免整条记录被表单覆盖） */
    public static function setAvatar(int $id, ?string $avatar): void
    {
        Database::get()->prepare('UPDATE persons SET avatar = ? WHERE id = ?')
            ->execute([$avatar, $id]);
    }

    public static function delete(int $id): void
    {
        Database::get()->prepare('DELETE FROM persons WHERE id = ?')->execute([$id]);
    }

    /** 全部家庭成员，以 id 为键 —— 家谱推导要按 id 频繁取人，这样最省事 */
    public static function map(int $familyId, string $kind = 'member'): array
    {
        $st = Database::get()->prepare('SELECT * FROM persons WHERE family_id = ? AND kind = ?');
        $st->execute([$familyId, $kind]);
        $out = [];
        foreach ($st->fetchAll() as $r) {
            $out[(int)$r['id']] = $r;
        }
        return $out;
    }

    /** 只给「选人」用的精简列表（下拉框、关系选择器） */
    public static function options(int $familyId, int $exceptId = 0): array
    {
        $st = Database::get()->prepare(
            'SELECT id, name, nickname, gender, is_placeholder FROM persons
             WHERE family_id = ? AND kind = "member" AND id <> ?
             ORDER BY sort_order ASC, id ASC'
        );
        $st->execute([$familyId, $exceptId]);
        return $st->fetchAll();
    }

    /**
     * 最近要过生日的人（首页用）。
     * 直接算「今天是今年的第几天」与生日的差值，跨年自动处理。
     */
    public static function upcomingBirthdays(int $familyId, int $withinDays = 60): array
    {
        $st = Database::get()->prepare(
            "SELECT id, name, avatar, birthday FROM persons
             WHERE family_id = ? AND kind = 'member' AND birthday IS NOT NULL
             ORDER BY DAYOFYEAR(birthday)"
        );
        $st->execute([$familyId]);
        $rows = $st->fetchAll();

        $out = [];
        foreach ($rows as $r) {
            $days = days_until_birthday($r['birthday']);
            if ($days !== null && $days <= $withinDays) {
                $r['days_left'] = $days;
                $out[] = $r;
            }
        }
        usort($out, function ($a, $b) {
            return $a['days_left'] <=> $b['days_left'];
        });
        return $out;
    }

    /** 校验表单，返回错误数组（空数组表示通过） */
    public static function validate(array $d): array
    {
        $err = [];
        if (trim((string)($d['name'] ?? '')) === '') {
            $err['name'] = '姓名不能为空';
        }
        $phone = trim((string)($d['phone'] ?? ''));
        if ($phone !== '' && !preg_match('/^\+?[0-9\-]{6,20}$/', $phone)) {
            $err['phone'] = '手机号格式看起来不对';
        }
        $email = trim((string)($d['email'] ?? ''));
        if ($email !== '' && !filter_var($email, FILTER_VALIDATE_EMAIL)) {
            $err['email'] = '邮箱格式看起来不对';
        }
        $b = trim((string)($d['birthday'] ?? ''));
        if ($b !== '' && !preg_match('/^\d{4}-\d{2}-\d{2}$/', $b)) {
            $err['birthday'] = '生日请按 年-月-日 填写';
        }
        // 身份证号只做很松的校验：家庭场景里要不要存它，本来就值得三思
        $idc = trim((string)($d['id_card'] ?? ''));
        if ($idc !== '' && !preg_match('/^[0-9Xx]{15,18}$/', $idc)) {
            $err['id_card'] = '身份证号应为 15 或 18 位';
        }
        $rank = $d['birth_rank'] ?? '';
        if ($rank !== '' && $rank !== null && (!ctype_digit((string)$rank) || (int)$rank < 1 || (int)$rank > 99)) {
            $err['birth_rank'] = '排行请填 1-99 的整数（老大填 1）';
        }
        return $err;
    }

    /** 角色与人物的中文名 */
    public static function genderWord(string $g): string
    {
        return ['m' => '男', 'f' => '女'][$g] ?? '';
    }
}