#include <gtest/gtest.h>

#include <fstream>
#include <sstream>
#include <stdexcept>

#include "../plugins/logic_gate/person_shoe_shape.h"
#include "utils/simple_json.h"

namespace rk3588 {
namespace {

PersonShoeShapeConfig LoadShapeConfig() {
    std::ifstream file("configs/full_pipeline_1080p_test_alarm.json");
    if (!file.is_open()) {
        throw std::runtime_error("failed to open configs/full_pipeline_1080p_test_alarm.json");
    }

    std::ostringstream buffer;
    buffer << file.rdbuf();

    SimpleJson root;
    std::string err;
    if (!ParseSimpleJson(buffer.str(), root, err)) {
        throw std::runtime_error("failed to parse configs/full_pipeline_1080p_test_alarm.json: " + err);
    }

    const auto& graphs = root.Find("graphs")->AsArray();
    const auto& nodes = graphs.at(0).Find("nodes")->AsArray();
    for (const auto& node : nodes) {
        if (node.ValueOr<std::string>("id", "") != "shoe_assoc") continue;
        const SimpleJson* ps = node.Find("person_shoe_check");
        if (!ps || !ps->IsObject()) break;

        PersonShoeShapeConfig config;
        config.min_front_shoe_width_ratio =
            ps->ValueOr<float>("min_front_shoe_width_ratio", config.min_front_shoe_width_ratio);
        config.max_front_aspect_ratio =
            ps->ValueOr<float>("max_front_shoe_aspect_ratio", config.max_front_aspect_ratio);
        config.max_side_height_width_ratio =
            ps->ValueOr<float>("max_side_height_width_ratio", config.max_side_height_width_ratio);
        return config;
    }

    throw std::runtime_error("failed to find shoe_assoc.person_shoe_check config");
}

TEST(PersonShoeShapeTest, RejectsSideViewBoxesBeyondConfiguredRatio) {
    const auto config = LoadShapeConfig();
    const float shoe_w = 20.0f;
    const float shoe_h = shoe_w * (config.max_side_height_width_ratio + 0.25f);
    const float person_w = shoe_w / (config.min_front_shoe_width_ratio + 0.02f);

    const auto metrics = EvaluatePersonShoeShape(shoe_w, shoe_h, person_w, config);

    EXPECT_FALSE(metrics.is_front_view);
    EXPECT_FALSE(metrics.shape_gate);
    EXPECT_GT(metrics.person_width_ratio, config.min_front_shoe_width_ratio);
    EXPECT_GT(metrics.aspect_ratio, config.max_side_height_width_ratio);
}

TEST(PersonShoeShapeTest, AllowsFrontViewBoxesAtConfiguredAspectLimit) {
    const auto config = LoadShapeConfig();
    const float shoe_w = 16.0f;
    const float shoe_h = shoe_w * config.max_front_aspect_ratio;
    const float person_w = shoe_w / (config.min_front_shoe_width_ratio - 0.02f);

    const auto metrics = EvaluatePersonShoeShape(shoe_w, shoe_h, person_w, config);

    EXPECT_TRUE(metrics.is_front_view);
    EXPECT_TRUE(metrics.shape_gate);
    EXPECT_LT(metrics.person_width_ratio, config.min_front_shoe_width_ratio);
    EXPECT_FLOAT_EQ(metrics.aspect_ratio, config.max_front_aspect_ratio);
}

TEST(PersonShoeShapeTest, RejectsFrontViewBoxesBeyondConfiguredAspect) {
    const auto config = LoadShapeConfig();
    const float shoe_w = 16.0f;
    const float shoe_h = shoe_w * (config.max_front_aspect_ratio + 0.1f);
    const float person_w = shoe_w / (config.min_front_shoe_width_ratio - 0.02f);

    const auto metrics = EvaluatePersonShoeShape(shoe_w, shoe_h, person_w, config);

    EXPECT_TRUE(metrics.is_front_view);
    EXPECT_FALSE(metrics.shape_gate);
    EXPECT_GT(metrics.aspect_ratio, config.max_front_aspect_ratio);
}

TEST(PersonShoeShapeTest, AllowsSideViewBoxesWithinConfiguredRatio) {
    const auto config = LoadShapeConfig();
    const float shoe_w = 40.0f;
    const float shoe_h = shoe_w * (config.max_side_height_width_ratio - 0.1f);
    const float person_w = shoe_w / (config.min_front_shoe_width_ratio + 0.05f);

    const auto metrics = EvaluatePersonShoeShape(shoe_w, shoe_h, person_w, config);

    EXPECT_FALSE(metrics.is_front_view);
    EXPECT_TRUE(metrics.shape_gate);
    EXPECT_GT(metrics.person_width_ratio, config.min_front_shoe_width_ratio);
    EXPECT_LT(metrics.aspect_ratio, config.max_side_height_width_ratio);
}

TEST(PersonShoeShapeTest, AllowsNearSquareSideViewBoxesWhenConfigPermits) {
    const auto config = LoadShapeConfig();
    const float shoe_w = 40.0f;
    const float shoe_h = shoe_w * (config.max_side_height_width_ratio - 0.05f);
    const float person_w = shoe_w / (config.min_front_shoe_width_ratio + 0.04f);

    const auto metrics = EvaluatePersonShoeShape(shoe_w, shoe_h, person_w, config);

    EXPECT_FALSE(metrics.is_front_view);
    EXPECT_TRUE(metrics.shape_gate);
    EXPECT_LT(metrics.aspect_ratio, config.max_side_height_width_ratio);
}

TEST(PersonShoeShapeTest, ReadsCurrentThresholdsFromRuntimeConfig) {
    PersonShoeShapeConfig config;
    ASSERT_NO_THROW(config = LoadShapeConfig());
    EXPECT_GT(config.min_front_shoe_width_ratio, 0.0f);
    EXPECT_GT(config.max_front_aspect_ratio, 1.0f);
    EXPECT_GT(config.max_side_height_width_ratio, 0.0f);
}

}  // namespace
}  // namespace rk3588