#include "ApiBatch.hpp"

namespace geopro::net {

ApiBatch::ApiBatch(QList<IApiCall*> calls, Predicate isFailure, QObject* parent)
    : QObject(parent), isFailure_(std::move(isFailure)) {
    Q_ASSERT(!calls.isEmpty());   // 契约：至少一个 call（空 batch 永不发 succeeded，调用方会挂起）
    Q_ASSERT(isFailure_);         // 契约：必须提供失败谓词（否则首个 finished 即 bad_function_call）
    responses_.resize(calls.size());
    remaining_ = static_cast<int>(calls.size());
    for (int i = 0; i < calls.size(); ++i) {
        IApiCall* c = calls[i];
        calls_.append(c);
        QObject::connect(c, &IApiCall::finished, this, [this, i](const ApiResponse& resp) {
            if (aborted_) return;                       // §5.0 入口守卫
            if (isFailure_(resp)) {
                aborted_ = true;                        // 此后 remaining_ 不再维护：迟到 finished 全被入口守卫挡掉
                for (const auto& other : calls_) {      // fail-fast：abort 其余在飞
                    if (other) other->abort();
                }
                emit failed(i, resp);
                deleteLater();
                return;
            }
            responses_[i] = resp;
            if (--remaining_ == 0) {
                emit succeeded(responses_);
                deleteLater();
            }
        });
    }
}

void ApiBatch::abort() {
    if (aborted_) return;
    aborted_ = true;
    for (const auto& c : calls_) {
        if (c) c->abort();
    }
    deleteLater();
}

}  // namespace geopro::net