// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: 2025 ai-ad4 and the FreePDFEditor contributors

#include "SpikeRunner.h"

#include <cstdio>
#include <cstdlib>
#include <string>

namespace freepdfeditor::spike {

namespace {

// Minimal hand-rolled JSON string escaper — avoids pulling a JSON lib into the
// spike harness, which must stay dependency-light so it builds first.
std::string esc(std::string s)
{
    std::string out;
    out.reserve(s.size() + 8);
    for (char c : s) {
        switch (c) {
            case '"':  out += "\\\""; break;
            case '\\': out += "\\\\"; break;
            case '\n': out += "\\n";  break;
            case '\r': out += "\\r";  break;
            case '\t': out += "\\t";  break;
            default:
                if (static_cast<unsigned char>(c) < 0x20) {
                    char buf[8];
                    std::snprintf(buf, sizeof(buf), "\\u%04x", c);
                    out += buf;
                } else {
                    out += c;
                }
        }
    }
    return out;
}

} // namespace

int emit_json_report(const SpikeResult& r)
{
    std::string samples;
    for (std::size_t i = 0; i < r.failed_samples.size(); ++i) {
        if (i) samples += ",";
        samples += "\"" + esc(r.failed_samples[i]) + "\"";
    }
    std::printf(
        "{\"spike\":\"%s\",\"name\":\"%s\",\"total\":%zu,\"passed\":%zu,"
        "\"failed\":%zu,\"errored\":%zu,\"metric\":\"%s\",\"value\":%.6f,"
        "\"target\":%.6f,\"gate_met\":%s,\"samples\":[%s],\"notes\":\"%s\"}\n",
        r.spike.c_str(), r.name.c_str(),
        r.total, r.passed, r.failed, r.errored,
        r.metric_name.c_str(), r.metric_value, r.target,
        r.gate_met ? "true" : "false",
        samples.c_str(), esc(r.notes).c_str());
    std::fflush(stdout);
    return r.gate_met ? 0 : 1;
}

} // namespace freepdfeditor::spike