#include <const_fmt/format.h>
#include <gtest/gtest.h>


using namespace const_fmt;
using namespace const_fmt::const_fmt_detail;


TEST(FormatDecimal, positive_int) {
    constexpr std::array<char, 8> control1   = {'0', '0', '0', '0',
                                              '0', '0', '0', '2'};
    constexpr std::array<char, 8> formatted1 = const_format<"{:08}">(2);

    constexpr std::array<char, 8> control2   = {' ', ' ', ' ', '2',
                                              '2', '2', '2', '2'};
    constexpr std::array<char, 8> formatted2 = const_format<"{:8}">(22222);

    constexpr std::array<char, 8> control3   = {'0', '0', '0', '1',
                                              '2', '3', '4', '5'};
    constexpr std::array<char, 8> formatted3 = const_format<"{:08.4}">(12345);

    constexpr std::array<char, 4> control4   = {'6', '7', '8', '9'};
    constexpr std::array<char, 4> formatted4 = const_format<"{:4}">(6789);

    constexpr std::array<char, 4> control5   = {'f', 'f', 'f', 'f'};
    constexpr std::array<char, 4> formatted5 = const_format<"{:4}">(67895);

    EXPECT_EQ(control1, formatted1);
    EXPECT_EQ(control2, formatted2);
    EXPECT_EQ(control3, formatted3);
    EXPECT_EQ(control4, formatted4);
    EXPECT_EQ(control5, formatted5);
}

TEST(FormatDecimal, negative_int) {
    constexpr std::array<char, 8> control1   = {'-', '0', '0', '0',
                                              '0', '0', '0', '2'};
    constexpr std::array<char, 8> formatted1 = const_format<"{:08}">(-2);

    constexpr std::array<char, 8> control2   = {' ', ' ', '-', '2',
                                              '2', '2', '2', '2'};
    constexpr std::array<char, 8> formatted2 = const_format<"{:8}">(-22222);

    constexpr std::array<char, 8> control3   = {'-', '0', '0', '1',
                                              '2', '3', '4', '5'};
    constexpr std::array<char, 8> formatted3 = const_format<"{:08.4}">(-12345);

    constexpr std::array<char, 5> control4   = {'-', '6', '7', '8', '9'};
    constexpr std::array<char, 5> formatted4 = const_format<"{:5}">(-6789);

    constexpr std::array<char, 5> control5   = {'-', 'f', 'f', 'f', 'f'};
    constexpr std::array<char, 5> formatted5 = const_format<"{:05}">(-66789);

    EXPECT_EQ(control1, formatted1);
    EXPECT_EQ(control2, formatted2);
    EXPECT_EQ(control3, formatted3);
    EXPECT_EQ(control4, formatted4);
    EXPECT_EQ(control5, formatted5);
}

TEST(FormatDecimal, positive_float) {
    constexpr std::array<char, 8> control1   = {'0', '0', '2', '.',
                                              '3', '4', '5', '6'};
    constexpr std::array<char, 8> formatted1 = const_format<"{:08.4}">(2.3456);

    // Float error: 2323.2 -> 2323.1
    constexpr std::array<char, 8> control2   = {' ', ' ', '2', '3',
                                              '2', '3', '.', '1'};
    constexpr std::array<char, 8> formatted2 = const_format<"{:8.1}">(2323.2);

    constexpr std::array<char, 8> control3   = {'1', '2', '3', '4',
                                              '.', '5', '0', '0'};
    constexpr std::array<char, 8> formatted3 = const_format<"{:08.3}">(1234.5);

    // Float error: .9 -> .8
    constexpr std::array<char, 4> control4   = {'f', 'f', '.', '8'};
    constexpr std::array<char, 4> formatted4 = const_format<"{:4.1}">(678.9);

    EXPECT_EQ(control1, formatted1);
    EXPECT_EQ(control2, formatted2);
    EXPECT_EQ(control3, formatted3);
    EXPECT_EQ(control4, formatted4);
}

TEST(FormatDecimal, negative_float) {
    constexpr std::array<char, 8> control1   = {'-', '0', '2', '.',
                                                '3', '4', '5', '6'};
    constexpr std::array<char, 8> formatted1 = const_format<"{:08.4}">(-2.3456);

    // Float error: 2323.2 -> 2323.1
    constexpr std::array<char, 8> control2   = {' ', '-', '2', '3',
                                                '2', '3', '.', '1'};
    constexpr std::array<char, 8> formatted2 = const_format<"{:8.1}">(-2323.2);

    constexpr std::array<char, 8> control3   = {'-', 'f', 'f', 'f',
                                                '.', '5', '0', '0'};
    constexpr std::array<char, 8> formatted3 = const_format<"{:08.3}">(-1234.5);


    EXPECT_EQ(control1, formatted1);
    EXPECT_EQ(control2, formatted2);
    EXPECT_EQ(control3, formatted3);
}