<?php
/**
 * 渠道新增计划保存接口  POST /api/channel/plan_save.php
 * 入参：id（可选，编辑时传）/ channel_type（渠道类别=source_channel 枚举，必填）/
 *       source_detail / industry / start_date / end_date / remark / status（待启动|已执行|错过）
 */
require_once __DIR__ . '/../common/db.php';
require_once __DIR__ . '/../common/response.php';
require_once __DIR__ . '/../common/auth.php';
require_once __DIR__ . '/../common/helpers.php';
require_once __DIR__ . '/../common/logger.php';

checkAjax();
checkPermission('channel');

$channelType = trim($_POST['channel_type'] ?? '');
if ($channelType === '') {
    Response::error('渠道类别（channel_type）为必填项', 400);
}
$status = trim($_POST['status'] ?? '待启动');
if (!in_array($status, ['待启动', '已执行', '错过'], true)) {
    $status = '待启动';
}

$id = (int)($_POST['id'] ?? 0);
$pdo = DB::getInstance()->getPdo();

$fields = [
    'channel_type' => $channelType,
    'source_detail' => trim($_POST['source_detail'] ?? '') !== '' ? trim($_POST['source_detail']) : null,
    'industry'      => trim($_POST['industry'] ?? '') !== '' ? trim($_POST['industry']) : null,
    'start_date'    => trim($_POST['start_date'] ?? '') !== '' ? $_POST['start_date'] : null,
    'end_date'      => trim($_POST['end_date'] ?? '') !== '' ? $_POST['end_date'] : null,
    'remark'        => trim($_POST['remark'] ?? '') !== '' ? trim($_POST['remark']) : null,
    'status'        => $status,
];

if ($id > 0) {
    $check = $pdo->prepare("SELECT id FROM channel_plans WHERE id = ? AND is_active = 1");
    $check->execute([$id]);
    if (!$check->fetch()) {
        Response::error('计划不存在');
    }
    [$sets, $params] = buildUpdate($fields);
    $params[] = $id;
    $pdo->prepare("UPDATE channel_plans SET $sets WHERE id = ?")->execute($params);
    logCurrent('update', 'channel_plan', 'channel_plans', $id, $fields);
    Response::success(null, '更新成功');
}

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