<?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，新增时必填）/
 *       source_detail / occurrence_address（发生地址）/ industry / start_date / end_date / remark / status（待启动|已执行|错过）/ cost（费用(元)）
 * 说明：编辑（传 id）时仅更新提交的字段，便于列表行内实时改状态/费用。
 */
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');

$id = (int)($_POST['id'] ?? 0);

// 新增时渠道类别必填；编辑时不强制（可能只改状态/费用）
if ($id <= 0) {
    $channelType = trim($_POST['channel_type'] ?? '');
    if ($channelType === '') {
        Response::error('渠道类别（channel_type）为必填项', 400);
    }
}

$status = trim($_POST['status'] ?? '');
if ($status !== '' && !in_array($status, ['待启动', '已执行', '错过'], true)) {
    Response::error('状态反馈取值不合法', 400);
}
$cost = trim($_POST['cost'] ?? '');
if ($cost !== '' && !is_numeric($cost)) {
    Response::error('费用(元)必须为数字', 400);
}

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

/** 从 POST 收集需要写入的字段（空串转 null） */
$fields = [];
$collect = function ($key) use (&$fields) {
    if (isset($_POST[$key])) {
        $v = trim((string)$_POST[$key]);
        $fields[$key] = $v !== '' ? $v : null;
    }
};

if ($id > 0) {
    $check = $pdo->prepare("SELECT id, status FROM channel_plans WHERE id = ? AND is_active = 1");
    $check->execute([$id]);
    $cur = $check->fetch();
    if (!$cur) {
        Response::error('计划不存在');
    }
    // 只更新提交的字段
    foreach (['channel_type', 'source_detail', 'occurrence_address', 'industry', 'start_date', 'end_date', 'remark', 'status'] as $k) {
        $collect($k);
    }
    if (isset($_POST['cost'])) {
        $c = trim((string)$_POST['cost']);
        $fields['cost'] = $c !== '' ? round((float)$c, 2) : null;
    }
    // 若只改了状态为「已执行」而原费用为空，前端会单独提交 cost；此处不自动置值
    if (!$fields) {
        Response::error('没有需要更新的字段', 400);
    }
    [$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');
}

// 新增：渠道类别必填
$channelType = trim($_POST['channel_type'] ?? '');
if ($channelType === '') {
    Response::error('渠道类别（channel_type）为必填项', 400);
}
$fields = [
    'channel_type'       => $channelType,
    'source_detail'      => strOrNull($_POST['source_detail'] ?? null),
    'occurrence_address' => strOrNull($_POST['occurrence_address'] ?? null),
    'industry'           => strOrNull($_POST['industry'] ?? null),
    'start_date'    => strOrNull($_POST['start_date'] ?? null),
    'end_date'      => strOrNull($_POST['end_date'] ?? null),
    'remark'        => strOrNull($_POST['remark'] ?? null),
    'status'        => $status !== '' ? $status : '待启动',
    'cost'          => $cost !== '' ? round((float)$cost, 2) : null,
];
[$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');