// 命令行版：转写文件、流式转写文件、或纯命令行实时字幕（不开窗口）。
// 只依赖 core，不链接 Qt Widgets。
#include <algorithm>
#include <atomic>
#include <chrono>
#include <csignal>
#include <cstdio>
#include <string>
#include <thread>
#include <vector>

#include <QCommandLineOption>
#include <QCommandLineParser>

#include "appcli.h"
#include "audio.h"
#include "livepipeline.h"
#include "iasr.h"
#include "qwen3asr.h"
#include "streamingasr.h"
#include "transcript.h"

namespace {

std::atomic<bool> g_stop{false};

extern "C" void handleSigInt(int) { g_stop = true; }

int runFile(lc::IAsr & asr, const QString & path)
{
    std::vector<float> pcm;
    std::string err;
    if (!lc::readWavMono(path.toStdString(), asr.sampleRate(), pcm, &err)) {
        std::fprintf(stderr, "读取音频失败: %s\n", err.c_str());
        return 1;
    }

    const double dur = (double) pcm.size() / asr.sampleRate();
    std::fprintf(stderr, "音频: %s (%.2fs)\n", qUtf8Printable(path), dur);

    const auto t0 = std::chrono::steady_clock::now();
    lc::AsrResult r = asr.transcribe(pcm.data(), pcm.size());
    const double wall = std::chrono::duration<double>(std::chrono::steady_clock::now() - t0).count();

    if (!r.ok) {
        std::fprintf(stderr, "转写失败: %s\n", r.error.c_str());
        return 1;
    }

    std::printf("语言: %s (%s)\n", r.transcript.language.c_str(),
                lc::languageDisplayName(r.transcript.language).c_str());
    std::printf("文本: %s\n", r.transcript.text.c_str());
    std::fprintf(stderr, "推理: %.2fs / 音频 %.2fs (rtf %.3f)  生成 %d tokens, 墙钟 %.2fs\n",
                 r.inferSeconds, dur, dur > 0 ? r.inferSeconds / dur : 0, r.tokenCount, wall);
    return 0;
}

int runStreamFile(lc::IAsr & asr, const QString & path, const lc::StreamOptions & sop)
{
    std::vector<float> pcm;
    std::string err;
    if (!lc::readWavMono(path.toStdString(), asr.sampleRate(), pcm, &err)) {
        std::fprintf(stderr, "读取音频失败: %s\n", err.c_str());
        return 1;
    }

    const double dur = (double) pcm.size() / asr.sampleRate();
    std::fprintf(stderr, "流式转写: %s (%.2fs)  chunk=%.1fs segment=%.1fs mode=%s\n",
                 qUtf8Printable(path), dur, sop.chunkSec, sop.maxUtteranceSec,
                 sop.incremental ? "incremental" : "window");

    lc::StreamingAsr stream(asr, sop);
    const size_t chunkSamples = (size_t) (sop.chunkSec * asr.sampleRate());

    const auto onStep = [](const lc::StreamingAsr::Step & s) {
        std::printf("\n[chunk %2d] 累计 %5.1fs | 音频 %5.2fs | 前缀 %5.2fs | 生成 %5.2fs (%d tok) "
                    "| 合计 %5.2fs%s\n",
                    s.chunkIndex, s.windowSeconds, s.encodeSeconds, s.prefillSeconds,
                    s.genSeconds, s.newTokens, s.inferSeconds,
                    s.ok ? "" : "  <失败>");
        if (!s.ok) std::printf("   error: %s\n", s.error.c_str());
        std::printf("   已提交: %s\n", s.committed.c_str());
        std::fflush(stdout);
    };

    for (size_t off = 0; off < pcm.size(); off += chunkSamples) {
        const size_t n = std::min(chunkSamples, pcm.size() - off);
        stream.feed(pcm.data() + off, n, onStep);
    }
    stream.flush(onStep);

    std::printf("\n==== 最终提交文本 (%s) ====\n%s\n",
                lc::languageDisplayName(stream.language()).c_str(),
                stream.committedText().c_str());
    return 0;
}

int runCliLive(lc::IAsr & asr, const lc::StreamOptions & sop)
{
    lc::LivePipelineOptions popt;
    popt.stream = sop;

    lc::LivePipeline pipeline(asr, popt);
    pipeline.setCaptionCallback([](const std::string & committed, const std::string & tail,
                                   const std::string & lang) {
        // 原地刷新：稳定部分正常显示，尾部用暗色表示未定
        std::printf("\r\033[K[%s] %s\033[2m%s\033[0m",
                    lc::languageDisplayName(lang).c_str(), committed.c_str(), tail.c_str());
        std::fflush(stdout);
    });
    pipeline.setErrorCallback([](const std::string & m) {
        std::fprintf(stderr, "\n采集失败: %s\n", m.c_str());
    });

    std::string err;
    if (!pipeline.start(&err)) {
        std::fprintf(stderr, "启动采集失败: %s\n", err.c_str());
        return 1;
    }

    std::fprintf(stderr, "正在采集: %s  (Ctrl+C 退出)\n", pipeline.deviceName().c_str());
    std::signal(SIGINT, handleSigInt);
    while (!g_stop) std::this_thread::sleep_for(std::chrono::milliseconds(100));
    pipeline.stop();
    return 0;
}

} // namespace

int main(int argc, char ** argv)
{
    QCoreApplication app(argc, argv);

    QCommandLineParser parser;
    parser.setApplicationDescription(QStringLiteral("实时字幕（命令行版）"));
    parser.addHelpOption();
    lc::app::addModelOptions(parser);
    lc::app::addStreamOptions(parser);
    lc::app::addBackendOptions(parser);
    parser.addOption(QCommandLineOption("file", "转写一个 wav 文件后退出", "path"));
    parser.addOption(QCommandLineOption("stream-file", "以流式模式转写 wav 文件后退出", "path"));
    parser.addOption(QCommandLineOption("cli-live", "实时转写字幕，只用命令行输出（不开窗口）"));
    parser.process(app);

    const lc::AsrOptions asrOpt = lc::app::asrOptions(parser);
    lc::StreamOptions sop = lc::app::streamOptions(parser);

    std::string err;
    std::unique_ptr<lc::IAsr> asr = lc::app::makeAsr(parser, asrOpt, &err);
    if (!asr) {
        std::fprintf(stderr, "%s\n", err.c_str());
        return 1;
    }
    // 原生流式识别器很便宜，用更细的更新粒度换低延迟
    if (asr->kind() == lc::AsrKind::NativeStreaming && !parser.isSet("stream-chunk")) {
        sop.chunkSec = 0.32;
    }

    if (parser.isSet("file"))        return runFile(*asr, parser.value("file"));
    if (parser.isSet("stream-file")) return runStreamFile(*asr, parser.value("stream-file"), sop);

    return runCliLive(*asr, sop);
}