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#include "src/raycast-diag.hpp"
#include "src/world.hpp"
#include "src/wall-atlas.hpp"
#include "loader/loader.hpp"
#include <benchmark/benchmark.h>
#include <Magnum/Math/Functions.h>

namespace floormat {

namespace {

#pragma message("TODO!")

world make_world()
{
    constexpr auto var = (variant_t)-1;
    auto wall1_ = loader.wall_atlas("test1"_s);
    auto wall2_ = loader.wall_atlas("concrete1"_s);
    auto wall1 = wall_image_proto{wall1_, var};
    auto wall2 = wall_image_proto{wall2_, var};

    auto w = world{};
    w[global_coords{{0, 3, 0}, {15,  0}}].t.wall_north() = wall1;
    w[global_coords{{1, 3, 0}, { 0,  0}}].t.wall_north() = wall1;
    w[global_coords{{1, 3, 0}, { 0,  0}}].t.wall_north() = wall1;
    w[global_coords{{1, 2, 0}, { 1, 15}}].t.wall_west()  = wall1;
    w[global_coords{{1, 2, 0}, { 1, 14}}].t.wall_west()  = wall1;

    w[global_coords{{0, 1, 0}, { 8, 11}}].t.wall_west()  = wall2;
    w[global_coords{{0, 1, 0}, { 8, 10}}].t.wall_west()  = wall2;
    w[global_coords{{0, 1, 0}, { 7, 10}}].t.wall_north() = wall2;

    w[global_coords{{0, 1, 0}, { 8,  8}}].t.wall_north() = wall1;
    w[global_coords{{0, 1, 0}, {10,  8}}].t.wall_north() = wall1;
    w[global_coords{{0, 1, 0}, {12,  8}}].t.wall_west()  = wall1;

    w[global_coords{{0, 2, 0}, { 9,  0}}].t.wall_north() = wall1;
    w[global_coords{{0, 2, 0}, {10,  0}}].t.wall_north() = wall1;

    return w;
}

[[maybe_unused]] void Raycast(benchmark::State& state)
{
    constexpr auto run1 = [](world& w, point to, bool b, float len = 0)
    {
        constexpr auto from = point{{0, 0, 0}, {11,12}, {1,-32}};
        constexpr float fuzz = 8;
        auto diag = rc::raycast_diag_s{};
        auto res = raycast_with_diag(diag, w, from, to, 0);
        fm_assert(res.success == b);
        if (len > 0)
        {
            auto tmin = res.success ? diag.V.length() : diag.tmin;
            fm_assert(len > 1e-6f);
            auto diff = Math::abs(tmin - len);
            if (diff > fuzz)
                fm_abort("|tmin=%f - len=%f| > %f",
                         (double)tmin, (double)len, (double)fuzz);
        }
    };

    auto w = make_world();

    const auto run = [&] {
        run1(w, point{{1, 3, 0}, {0,1}, {-21,23}}, false, 2288);
    };

    run();
    for (auto _ : state)
        run();
}

BENCHMARK(Raycast)->Unit(benchmark::kMicrosecond);

} // namespace

} // namespace floormat