#include "aare/File.hpp"

#include <catch2/catch_test_macros.hpp>
#include <filesystem>

#include "test_config.hpp"

using aare::File;

TEST_CASE("Read number of frames from a jungfrau raw file", "[.integration]") {

    auto fpath = test_data_path() / "jungfrau" / "jungfrau_single_master_0.json";
    REQUIRE(std::filesystem::exists(fpath));

    File f(fpath, "r");
    REQUIRE(f.total_frames() == 10);
}

TEST_CASE("Read frame numbers from a jungfrau raw file", "[.integration]") {
    auto fpath = test_data_path() / "jungfrau" / "jungfrau_single_master_0.json";
    REQUIRE(std::filesystem::exists(fpath));

    File f(fpath, "r");

    // we know this file has 10 frames with frame numbers 1 to 10
    // f0 1,2,3
    // f1 4,5,6
    // f2 7,8,9
    // f3 10
    for (size_t i = 0; i < 10; i++) {
        CHECK(f.frame_number(i) == i + 1);
    }
}

TEST_CASE("Read a frame number too high throws", "[.integration]") {
    auto fpath = test_data_path() / "jungfrau" / "jungfrau_single_master_0.json";
    REQUIRE(std::filesystem::exists(fpath));

    File f(fpath, "r");

    // we know this file has 10 frames with frame numbers 1 to 10
    // f0 1,2,3
    // f1 4,5,6
    // f2 7,8,9
    // f3 10
    REQUIRE_THROWS(f.frame_number(10));
}

TEST_CASE("Read a frame numbers where the subfile is missing throws", "[.integration]") {
    auto fpath = test_data_path() / "jungfrau" / "jungfrau_missing_subfile_master_0.json";
    REQUIRE(std::filesystem::exists(fpath));

    File f(fpath, "r");

    // we know this file has 10 frames with frame numbers 1 to 10
    // f0 1,2,3
    // f1 4,5,6 - but files f1-f3 are missing
    // f2 7,8,9 - gone  
    // f3 10    - gone
    REQUIRE(f.frame_number(0) == 1);
    REQUIRE(f.frame_number(1) == 2);
    REQUIRE(f.frame_number(2) == 3);
    REQUIRE_THROWS(f.frame_number(4));
    REQUIRE_THROWS(f.frame_number(7));
    REQUIRE_THROWS(f.frame_number(937));
    REQUIRE_THROWS(f.frame_number(10));
}


TEST_CASE("Read data from a jungfrau 500k single port raw file", "[.integration]") {
    auto fpath = test_data_path() / "jungfrau" / "jungfrau_single_master_0.json";
    REQUIRE(std::filesystem::exists(fpath));

    File f(fpath, "r");

    // we know this file has 10 frames with pixel 0,0 being: 2123, 2051, 2109, 2117, 2089, 2095, 2072, 2126, 2097, 2102
    std::vector<uint16_t> pixel_0_0 = {2123, 2051, 2109, 2117, 2089, 2095, 2072, 2126, 2097, 2102};
    for (size_t i = 0; i < 10; i++) {
        auto frame = f.read_frame();
        CHECK(frame.rows() == 512);
        CHECK(frame.cols() == 1024);
        CHECK(frame.view<uint16_t>()(0, 0) == pixel_0_0[i]);
    }
}

TEST_CASE("Read frame numbers from a raw file", "[.integration]") {
    auto fpath = test_data_path() / "eiger" / "eiger_500k_16bit_master_0.json";
    REQUIRE(std::filesystem::exists(fpath));

    // we know this file has 3 frames with frame numbers 14, 15, 16
    std::vector<size_t> frame_numbers = {14, 15, 16};

    File f(fpath, "r");
    for (size_t i = 0; i < 3; i++) {
        CHECK(f.frame_number(i) == frame_numbers[i]);
    }
}

TEST_CASE("Compare reading from a numpy file with a raw file", "[.integration]") {
    auto fpath_raw = test_data_path() / "jungfrau" / "jungfrau_single_master_0.json";
    REQUIRE(std::filesystem::exists(fpath_raw));

    auto fpath_npy = test_data_path() / "jungfrau" / "jungfrau_single_0.npy";
    REQUIRE(std::filesystem::exists(fpath_npy));

    File raw(fpath_raw, "r");
    File npy(fpath_npy, "r");

    CHECK(raw.total_frames() == 10);
    CHECK(npy.total_frames() == 10);

    for (size_t i = 0; i < 10; ++i) {
        auto raw_frame = raw.read_frame();
        auto npy_frame = npy.read_frame();
        CHECK((raw_frame.view<uint16_t>() == npy_frame.view<uint16_t>()));
    }
}

TEST_CASE("Read multipart files", "[.integration]") {
    auto fpath = test_data_path() / "jungfrau" / "jungfrau_double_master_0.json";
    REQUIRE(std::filesystem::exists(fpath));

    File f(fpath, "r");

    // we know this file has 10 frames check read_multiport.py for the values
    std::vector<uint16_t> pixel_0_0 = {2099, 2121, 2108, 2084, 2084, 2118, 2066, 2108, 2112, 2116};
    std::vector<uint16_t> pixel_0_1 = {2842, 2796, 2865, 2798, 2805, 2817, 2852, 2789, 2792, 2833};
    std::vector<uint16_t> pixel_255_1023 = {2149, 2037, 2115, 2102, 2118, 2090, 2036, 2071, 2073, 2142};
    std::vector<uint16_t> pixel_511_1023 = {3231, 3169, 3167, 3162, 3168, 3160, 3171, 3171, 3169, 3171};
    std::vector<uint16_t> pixel_1_0 = {2748, 2614, 2665, 2629, 2618, 2630, 2631, 2634, 2577, 2598};

    for (size_t i = 0; i < 10; i++) {
        auto frame = f.read_frame();
        CHECK(frame.rows() == 512);
        CHECK(frame.cols() == 1024);
        CHECK(frame.view<uint16_t>()(0, 0) == pixel_0_0[i]);
        CHECK(frame.view<uint16_t>()(0, 1) == pixel_0_1[i]);
        CHECK(frame.view<uint16_t>()(1, 0) == pixel_1_0[i]);
        CHECK(frame.view<uint16_t>()(255, 1023) == pixel_255_1023[i]);
        CHECK(frame.view<uint16_t>()(511, 1023) == pixel_511_1023[i]);
    }
}

TEST_CASE("Read file with unordered frames", "[.integration]") {
    //TODO! Better explanation and error message
    auto fpath = test_data_path() / "mythen" / "scan242_master_3.raw";
    REQUIRE(std::filesystem::exists(fpath));
    File f(fpath);
    REQUIRE_THROWS((f.read_frame()));
}