<?php
/**
 * 渠道新增/编辑接口  POST /api/channel/save.php
 * 入参：id（编辑时必传）/ channel_name / channel_type / contact_person / contact_phone / contact_email / efficiency_score / remark
 * 数据源：channels 表（见 sql/system_tables.sql 第5节）
 */
require_once __DIR__ . '/../common/db.php';
require_once __DIR__ . '/../common/response.php';
require_once __DIR__ . '/../common/auth.php';
require_once __DIR__ . '/../common/logger.php';
require_once __DIR__ . '/../common/helpers.php';

checkAjax();
checkPermission('channel');

$id = (int)($_POST['id'] ?? 0);
$channelName = trim($_POST['channel_name'] ?? '');
if ($channelName === '') {
    Response::error('渠道名称为必填项', 400);
}

$fields = [
    'channel_name'    => $channelName,
    'channel_type'    => trim($_POST['channel_type'] ?? '') ?: null,
    'contact_person'  => trim($_POST['contact_person'] ?? '') ?: null,
    'contact_phone'   => trim($_POST['contact_phone'] ?? '') ?: null,
    'contact_email'   => trim($_POST['contact_email'] ?? '') ?: null,
    'remark'          => trim($_POST['remark'] ?? '') ?: null,
];
$score = (float)($_POST['efficiency_score'] ?? 0);
$fields['efficiency_score'] = max(0, min(100, $score));

$pdo = DB::getInstance()->getPdo();

if ($id > 0) {
    $check = $pdo->prepare("SELECT * FROM channels WHERE id = ?");
    $check->execute([$id]);
    $old = $check->fetch();
    if (!$old) {
        Response::error('渠道不存在');
    }
    [$sets, $params] = buildUpdate($fields);
    $params[] = $id;
    $pdo->prepare("UPDATE channels SET $sets WHERE id = ?")->execute($params);
    logCurrent('update', 'channel', 'channels', $id, ['before' => $old, 'after' => $fields]);
    Response::success(['id' => $id], '更新成功');
}

[$sql, $params] = buildInsert($fields);
$pdo->prepare("INSERT INTO channels $sql")->execute($params);
$newId = (int)$pdo->lastInsertId();
logCurrent('add', 'channel', 'channels', $newId, $fields);
Response::success(['id' => $newId], '新增成功');