// Step 1927: Sprint 279 Integration
// poly-sort: Python data-gen calls Rust sort-core.
// DAP proxy handles stack trace request; decoder labels Python+Rust frames;
// detector finds the Python→Rust seam; router directs to the active adapter.
//
//  t1: DAP proxy handles stackTrace, returns custom frame list
//  t2: decoder labels poly-sort stack (Python then Rust frames)
//  t3: seam detector finds Python→Rust boundary in poly-sort stack
//  t4: adapter router switches from Python to Rust at seam
//  t5: full pipeline: stack request → decode → detect seam → switch adapter
//  t6: Sprint279IntegrationSummary reports complete

#include "DAPProxyServer.h"
#include "DebugAdapterRouter.h"
#include "PolyglotStackTraceDecoder.h"
#include "LanguageSeamFrameDetector.h"
#include "Sprint279IntegrationSummary.h"
#include <iostream>
#include <nlohmann/json.hpp>

using json = nlohmann::json;
namespace ws = whetstone;

static int p=0,f=0;
#define T(n) { std::cout<<"  "<<#n<<"... "; }
#define P() { std::cout<<"PASS\n"; ++p; }
#define F(m) { std::cout<<"FAIL: "<<m<<"\n"; ++f; }
#define C(c,m) if(!(c)){F(m);return;}

// poly-sort raw frames: Python data-gen → Rust sort-core
static std::vector<ws::RawFrame> polySortRawFrames() {
    return {
        {1, "main",       "datagen/main.py",  10},
        {2, "generate",   "datagen/gen.py",   42},
        {3, "sort_array", "sort-core/lib.rs",  5},
        {4, "partition",  "sort-core/lib.rs", 18},
        {5, "swap",       "sort-core/lib.rs", 30},
    };
}

void t1(){
    T(dap_proxy_handles_stackTrace);
    ws::DAPProxyServer srv;
    srv.registerHandler("stackTrace", [](const json& args) -> json {
        return {{"stackFrames", json::array({
            {{"id",1},{"name","main"},       {"source","datagen/main.py"},  {"line",10}},
            {{"id",2},{"name","generate"},   {"source","datagen/gen.py"},   {"line",42}},
            {{"id",3},{"name","sort_array"}, {"source","sort-core/lib.rs"}, {"line",5}}
        })}};
    });
    json req = {{"seq",1},{"type","request"},{"command","stackTrace"},
                {"arguments",{{"threadId",1}}}};
    auto resp = srv.handle(req);
    C(resp["success"] == true,                       "success");
    C(resp["body"]["stackFrames"].size() == 3,        "three frames");
    C(resp["body"]["stackFrames"][2]["name"] == "sort_array", "rust frame present");
    P();
}

void t2(){
    T(decoder_labels_polysort_stack);
    ws::PolyglotStackTraceDecoder dec;
    auto frames = dec.decode(polySortRawFrames());
    C(frames.size() == 5, "five frames");
    C(frames[0].language == "Python", "frame0 Python");
    C(frames[1].language == "Python", "frame1 Python");
    C(frames[2].language == "Rust",   "frame2 Rust");
    C(frames[3].language == "Rust",   "frame3 Rust");
    C(frames[4].language == "Rust",   "frame4 Rust");
    C(frames[2].astNodeId == "Rust:sort_array", "astNodeId for sort_array");
    P();
}

void t3(){
    T(seam_detector_finds_python_rust_boundary);
    ws::PolyglotStackTraceDecoder dec;
    ws::LanguageSeamFrameDetector det;
    auto frames = dec.decode(polySortRawFrames());
    C(det.seamCount(frames) == 2,              "two seam frames");
    C(det.primarySeam(frames) == 1,            "primary seam at index 1 (generate)");
    C(det.crossesBoundary(frames,"Python","Rust"), "Python→Rust transition present");
    auto langs = det.frameLanguages(frames);
    C(langs.size() == 2,      "two languages");
    C(langs[0] == "Python",   "Python first");
    C(langs[1] == "Rust",     "Rust second");
    P();
}

void t4(){
    T(adapter_router_switches_at_seam);
    ws::DebugAdapterRouter router;
    router.registerAdapter("Python", {"stackTrace","continue","stepIn","next"});
    router.registerAdapter("Rust",   {"stackTrace","continue","next"});
    // Start in Python (data-gen side)
    router.setActiveLanguage("Python");
    C( router.routeCommand("stepIn","Python"),  "Python can stepIn");
    C(!router.routeCommand("stepIn","Rust"),    "Rust can't stepIn (not active)");
    // Cross the seam into Rust
    router.setActiveLanguage("Rust");
    C( router.routeCommand("continue","Rust"),  "Rust can continue");
    C(!router.routeCommand("stepIn","Python"),  "Python no longer active");
    C(!router.routeCommand("stepIn","Rust"),    "Rust lacks stepIn");
    P();
}

void t5(){
    T(full_pipeline_stack_decode_seam_switch);
    ws::DAPProxyServer srv;
    ws::PolyglotStackTraceDecoder dec;
    ws::LanguageSeamFrameDetector det;
    ws::DebugAdapterRouter router;

    router.registerAdapter("Python", {"stackTrace","continue","stepIn"});
    router.registerAdapter("Rust",   {"stackTrace","continue"});
    router.setActiveLanguage("Python");

    // 1. DAP request brings back raw frames
    auto raw = polySortRawFrames();
    // 2. Decode
    auto frames = dec.decode(raw);
    // 3. Detect seam
    int seam = det.primarySeam(frames);
    C(seam == 1, "seam at index 1");
    // 4. The frame at the seam's next index is Rust — switch adapter
    std::string seamLang = frames[seam + 1].language;
    C(seamLang == "Rust", "seam crosses into Rust");
    router.setActiveLanguage(seamLang);
    // 5. Rust adapter now active
    C(router.getActiveLanguage() == "Rust",         "Rust is active");
    C( router.routeCommand("continue","Rust"),       "Rust handles continue");
    C(!router.routeCommand("stepIn","Rust"),         "Rust lacks stepIn — expected");
    P();
}

void t6(){
    T(sprint279_integration_summary_complete);
    ws::Sprint279IntegrationSummary s;
    C(s.stepsCompleted == 5,                           "5 steps");
    C(s.success,                                       "success");
    C(s.sprintName().find("279") != std::string::npos, "279 in name");
    P();
}

int main(){
    std::cout << "Step 1927: Sprint 279 Integration (poly-sort: Python + Rust DAP)\n";
    t1(); t2(); t3(); t4(); t5(); t6();
    std::cout << "\n" << p << "/" << (p+f) << " passed\n";
    return f > 0 ? 1 : 0;
}