#include <gtest/gtest.h>

#include <string>
#include <vector>

#include "face/face_recog_debug.h"
#include "utils/shared_state.h"

#include "../plugins/ai_face_recog/ai_face_recog_node.cpp"

namespace rk3588 {
namespace {

Detection MakeDetection(int cls_id, int track_id, float x, float y, float w, float h) {
    Detection det;
    det.cls_id = cls_id;
    det.track_id = track_id;
    det.score = 0.95f;
    det.bbox = Rect{x, y, w, h};
    return det;
}

Detection MakePersonDetection(int track_id, float x, float y, float w, float h) {
    return MakeDetection(0, track_id, x, y, w, h);
}

TEST(FaceTrackAssociationTest, PicksContainingTrackedPerson) {
    const Rect face{50.0f, 50.0f, 20.0f, 20.0f};
    const std::vector<Detection> dets = {
        MakePersonDetection(101, 45.0f, 45.0f, 20.0f, 20.0f),
        MakePersonDetection(202, 40.0f, 40.0f, 40.0f, 40.0f),
        MakePersonDetection(303, 10.0f, 10.0f, 15.0f, 15.0f),
    };

    EXPECT_EQ(AssociateFaceToPersonTrack(face, dets, 0), 202);
}

TEST(FaceTrackAssociationTest, RejectsWhenNoTrackedPersonMatches) {
    const Rect face{50.0f, 50.0f, 20.0f, 20.0f};
    const std::vector<Detection> dets = {
        MakePersonDetection(-1, 45.0f, 45.0f, 20.0f, 20.0f),
        MakePersonDetection(404, 200.0f, 200.0f, 20.0f, 20.0f),
    };

    EXPECT_EQ(AssociateFaceToPersonTrack(face, dets, 0), -1);
}

TEST(FaceTrackAssociationTest, RejectsNonPersonDetections) {
    const Rect face{50.0f, 50.0f, 20.0f, 20.0f};
    const std::vector<Detection> dets = {
        MakeDetection(1, 909, 40.0f, 40.0f, 40.0f, 40.0f),
    };

    EXPECT_EQ(AssociateFaceToPersonTrack(face, dets, 0), -1);
}

TEST(FaceTrackAssociationTest, HonorsConfiguredPersonClassId) {
    const Rect face{50.0f, 50.0f, 20.0f, 20.0f};
    const std::vector<Detection> dets = {
        MakeDetection(1, 808, 40.0f, 40.0f, 40.0f, 40.0f),
    };

    EXPECT_EQ(AssociateFaceToPersonTrack(face, dets, 1), 808);
}

TEST(FaceTrackAssociationTest, FallsBackToSharedTrackedPersonsWhenFrameDetectionsMissing) {
    const std::string state_key = "face_track_assoc_test";
    SharedState::Instance().ClearTargets(state_key);

    TargetsSnapshot snap;
    snap.img_w = 1920;
    snap.img_h = 1080;
    snap.model_name = "person_det";
    TrackedObject obj;
    obj.cls_id = 0;
    obj.track_id = 321;
    obj.score = 0.0f;
    obj.bbox = Rect{40.0f, 40.0f, 60.0f, 80.0f};
    obj.confirmed = true;
    snap.objects.push_back(obj);
    SharedState::Instance().SetTargets(state_key, std::move(snap));

    const Rect face{50.0f, 50.0f, 20.0f, 20.0f};
    FaceTrackAssociationDiag diag;
    const int track_id = AssociateFaceToPersonTrackWithFallback(face, nullptr, 0, state_key, 1000, &diag);

    EXPECT_EQ(track_id, 321);
    EXPECT_EQ(diag.source, "shared_state");
    EXPECT_EQ(diag.total_dets, 1);
    EXPECT_EQ(diag.person_dets, 1);
    EXPECT_EQ(diag.tracked_person_dets, 1);
    EXPECT_EQ(diag.containing_tracked_person_dets, 1);
    EXPECT_EQ(diag.best_track_id, 321);

    SharedState::Instance().ClearTargets(state_key);
}

TEST(FaceTrackAssociationTest, DebugLineIncludesPersonTrackId) {
    FaceRecogItem item;
    item.person_track_id = 88;
    item.candidate_person_id = 7;
    item.candidate_name = "alice";
    item.best_sim = 0.89f;
    item.second_sim = 0.74f;
    item.state = FaceRecogState::Known;

    const std::string line = BuildFaceRecogDebugSummaryLine("face_recog", 42, item);

    EXPECT_NE(line.find("person_track_id=88"), std::string::npos);
    EXPECT_NE(line.find("candidate=alice"), std::string::npos);
}

}  // namespace
}  // namespace rk3588