#include "app_helper.hpp"

#include <cstdio>
#include <fstream>
#include <stdint.h>
#include <string>

TEST(Split, SimpleByToken) {
    auto out = CLI::detail::split("one.two.three", '.');
    ASSERT_EQ(3, out.size());
    EXPECT_EQ("one", out.at(0));
    EXPECT_EQ("two", out.at(1));
    EXPECT_EQ("three", out.at(2));
}

TEST(Split, Single) {
    auto out = CLI::detail::split("one", '.');
    ASSERT_EQ(1, out.size());
    EXPECT_EQ("one", out.at(0));
}

TEST(Split, Empty) {
    auto out = CLI::detail::split("", '.');
    ASSERT_EQ(1, out.size());
    EXPECT_EQ("", out.at(0));
}

TEST(String, InvalidName) {
    EXPECT_TRUE(CLI::detail::valid_name_string("valid"));
    EXPECT_FALSE(CLI::detail::valid_name_string("-invalid"));
    EXPECT_TRUE(CLI::detail::valid_name_string("va-li-d"));
    EXPECT_FALSE(CLI::detail::valid_name_string("vali&d"));
    EXPECT_TRUE(CLI::detail::valid_name_string("_valid"));
}

TEST(Trim, Various) {
    std::string s1{"  sdlfkj sdflk sd s  "};
    std::string a1{"sdlfkj sdflk sd s"};
    CLI::detail::trim(s1);
    EXPECT_EQ(a1, s1);
    
    std::string s2{" a \t"};
    CLI::detail::trim(s2);
    EXPECT_EQ("a", s2);

    std::string s3{" a \n"};
    CLI::detail::trim(s3);
    EXPECT_EQ("a", s3);

    std::string s4{" a b "};
    EXPECT_EQ("a b", CLI::detail::trim(s4));
}


TEST(Trim, VariousFilters) {
    std::string s1{"  sdlfkj sdflk sd s  "};
    std::string a1{"sdlfkj sdflk sd s"};
    CLI::detail::trim(s1, " ");
    EXPECT_EQ(a1, s1);
    
    std::string s2{" a \t"};
    CLI::detail::trim(s2, " ");
    EXPECT_EQ("a \t", s2);

    std::string s3{"abdavda"};
    CLI::detail::trim(s3, "a");
    EXPECT_EQ("bdavd", s3);

    std::string s4{"abcabcabc"};
    EXPECT_EQ("cabcabc", CLI::detail::trim(s4, "ab"));
}

TEST(Trim, TrimCopy) {
    std::string orig{" cabc  "};
    std::string trimmed = CLI::detail::trim_copy(orig);
    EXPECT_EQ("cabc", trimmed);
    EXPECT_NE(orig, trimmed);
    CLI::detail::trim(orig);
    EXPECT_EQ(trimmed, orig);

    orig = "abcabcabc";
    trimmed = CLI::detail::trim_copy(orig, "ab");
    EXPECT_EQ("cabcabc", trimmed);
    EXPECT_NE(orig, trimmed);
    CLI::detail::trim(orig, "ab");
    EXPECT_EQ(trimmed, orig);

}


TEST(Validators, FileExists) {
    std::string myfile{"TestFileNotUsed.txt"};
    EXPECT_FALSE(CLI::ExistingFile(myfile));
    bool ok = static_cast<bool>(std::ofstream(myfile.c_str()).put('a')); // create file
    EXPECT_TRUE(ok);
    EXPECT_TRUE(CLI::ExistingFile(myfile));

    std::remove(myfile.c_str());
    EXPECT_FALSE(CLI::ExistingFile(myfile));
}

TEST(Validators, FileNotExists) {
    std::string myfile{"TestFileNotUsed.txt"};
    EXPECT_TRUE(CLI::NonexistentPath(myfile));
    bool ok = static_cast<bool>(std::ofstream(myfile.c_str()).put('a')); // create file
    EXPECT_TRUE(ok);
    EXPECT_FALSE(CLI::NonexistentPath(myfile));

    std::remove(myfile.c_str());
    EXPECT_TRUE(CLI::NonexistentPath(myfile));
}

TEST(Validators, FileIsDir) {
    std::string mydir{"../tests"};
    EXPECT_FALSE(CLI::ExistingFile(mydir));
}

TEST(Validators, DirectoryExists) {
    std::string mydir{"../tests"};
    EXPECT_TRUE(CLI::ExistingDirectory(mydir));
}

TEST(Validators, DirectoryNotExists) {
    std::string mydir{"nondirectory"};
    EXPECT_FALSE(CLI::ExistingDirectory(mydir));
}

TEST(Validators, DirectoryIsFile) {
    std::string myfile{"TestFileNotUsed.txt"};
    EXPECT_TRUE(CLI::NonexistentPath(myfile));
    bool ok = static_cast<bool>(std::ofstream(myfile.c_str()).put('a')); // create file
    EXPECT_TRUE(ok);
    EXPECT_FALSE(CLI::ExistingDirectory(myfile));

    std::remove(myfile.c_str());
    EXPECT_TRUE(CLI::NonexistentPath(myfile));
}

// Yes, this is testing an app_helper :)
TEST(AppHelper, TempfileCreated) {
    std::string name = "TestFileNotUsed.txt";
    {
    TempFile myfile{name};

    EXPECT_FALSE(CLI::ExistingFile(myfile));
    
    bool ok = static_cast<bool>(std::ofstream(myfile.c_str()).put('a')); // create file
    EXPECT_TRUE(ok);
    EXPECT_TRUE(CLI::ExistingFile(name));
    EXPECT_THROW({TempFile otherfile(name);}, std::runtime_error);
    }
    EXPECT_FALSE(CLI::ExistingFile(name));
}

TEST(AppHelper, TempfileNotCreated) {
    std::string name = "TestFileNotUsed.txt";
    {
    TempFile myfile{name};

    EXPECT_FALSE(CLI::ExistingFile(myfile));
    }
    EXPECT_FALSE(CLI::ExistingFile(name));
}

TEST(AppHelper, Ofstream) {

    std::string name = "TestFileNotUsed.txt";
    {
    TempFile myfile(name);

    {
    std::ofstream out{myfile};
    out << "this is output" << std::endl;
    }

    EXPECT_TRUE(CLI::ExistingFile(myfile));
    }
    EXPECT_FALSE(CLI::ExistingFile(name));

}

TEST(Split, StringList) {

    std::vector<std::string> results {"a", "long", "--lone", "-q"};
    EXPECT_EQ(results, CLI::detail::split_names("a,long,--lone,-q"));

    EXPECT_EQ(std::vector<std::string>({"one"}), CLI::detail::split_names("one"));
}

TEST(RegEx, Shorts) {
    std::string name, value;

    EXPECT_TRUE(CLI::detail::split_short("-a", name, value));
    EXPECT_EQ("a", name);
    EXPECT_EQ("", value);

    EXPECT_TRUE(CLI::detail::split_short("-B", name, value));
    EXPECT_EQ("B", name);
    EXPECT_EQ("", value);

    EXPECT_TRUE(CLI::detail::split_short("-cc", name, value));
    EXPECT_EQ("c", name);
    EXPECT_EQ("c", value);

    EXPECT_TRUE(CLI::detail::split_short("-simple", name, value));
    EXPECT_EQ("s", name);
    EXPECT_EQ("imple", value);

    EXPECT_FALSE(CLI::detail::split_short("--a", name, value));
    EXPECT_FALSE(CLI::detail::split_short("--thing", name, value));
    EXPECT_FALSE(CLI::detail::split_short("--", name, value));
    EXPECT_FALSE(CLI::detail::split_short("something", name, value));
    EXPECT_FALSE(CLI::detail::split_short("s", name, value));
}

TEST(RegEx, Longs) {
    std::string name, value;

    EXPECT_TRUE(CLI::detail::split_long("--a", name, value));
    EXPECT_EQ("a", name);
    EXPECT_EQ("", value);

    EXPECT_TRUE(CLI::detail::split_long("--thing", name, value));
    EXPECT_EQ("thing", name);
    EXPECT_EQ("", value);

    EXPECT_TRUE(CLI::detail::split_long("--some=thing", name, value));
    EXPECT_EQ("some", name);
    EXPECT_EQ("thing", value);

    EXPECT_FALSE(CLI::detail::split_long("-a", name, value));
    EXPECT_FALSE(CLI::detail::split_long("-things", name, value));
    EXPECT_FALSE(CLI::detail::split_long("Q", name, value));
    EXPECT_FALSE(CLI::detail::split_long("--", name, value));

}

TEST(RegEx, SplittingNew) {

    std::vector<std::string> shorts;
    std::vector<std::string> longs;
    std::string pname;

    EXPECT_NO_THROW(std::tie(shorts, longs, pname) = CLI::detail::get_names({"--long", "-s", "-q", "--also-long"}));
    EXPECT_EQ(std::vector<std::string>({"long", "also-long"}), longs);
    EXPECT_EQ(std::vector<std::string>({"s", "q"}), shorts);
    EXPECT_EQ("", pname);

    EXPECT_NO_THROW(std::tie(shorts, longs, pname) = CLI::detail::get_names({"--long", "", "-s", "-q", "", "--also-long"}));
    EXPECT_EQ(std::vector<std::string>({"long", "also-long"}), longs);
    EXPECT_EQ(std::vector<std::string>({"s", "q"}), shorts);

    EXPECT_THROW(std::tie(shorts, longs, pname) = CLI::detail::get_names({"-"}), CLI::BadNameString);
    EXPECT_THROW(std::tie(shorts, longs, pname) = CLI::detail::get_names({"--"}), CLI::BadNameString);
    EXPECT_THROW(std::tie(shorts, longs, pname) = CLI::detail::get_names({"-hi"}), CLI::BadNameString);
    EXPECT_THROW(std::tie(shorts, longs, pname) = CLI::detail::get_names({"---hi"}), CLI::BadNameString);
    EXPECT_THROW(std::tie(shorts, longs, pname) = CLI::detail::get_names({"one","two"}), CLI::BadNameString);

}

TEST(String, ToLower) {

    EXPECT_EQ("one and two", CLI::detail::to_lower("one And TWO"));
}

TEST(Join, Forward) {
    std::vector<std::string> val {{"one", "two", "three"}};
    EXPECT_EQ("one,two,three", CLI::detail::join(val));
    EXPECT_EQ("one;two;three", CLI::detail::join(val, ";"));
}


TEST(Join, Backward) {
    std::vector<std::string> val {{"three", "two", "one"}};
    EXPECT_EQ("one,two,three", CLI::detail::rjoin(val));
    EXPECT_EQ("one;two;three", CLI::detail::rjoin(val, ";"));
}

TEST(SplitUp, Simple) {
    std::vector<std::string> oput = {"one", "two three"};
    std::string orig {"one \"two three\""};
    std::vector<std::string> result = CLI::detail::split_up(orig);
    EXPECT_EQ(oput, result);
}

TEST(SplitUp, Layered) {
    std::vector<std::string> output = {"one \'two three\'"};
    std::string orig {"\"one \'two three\'\""};
    std::vector<std::string> result = CLI::detail::split_up(orig);
    EXPECT_EQ(output, result);
}

TEST(SplitUp, Spaces) {
    std::vector<std::string> oput = {"one", "  two three"};
    std::string orig {"  one  \"  two three\" "};
    std::vector<std::string> result = CLI::detail::split_up(orig);
    EXPECT_EQ(oput, result);
}

TEST(SplitUp, BadStrings) {
    std::vector<std::string> oput = {"one", "  two three"};
    std::string orig {"  one  \"  two three "};
    std::vector<std::string> result = CLI::detail::split_up(orig);
    EXPECT_EQ(oput, result);

    oput = {"one", "  two three"};
    orig =  "  one  \'  two three ";
    result = CLI::detail::split_up(orig);
    EXPECT_EQ(oput, result);
}

TEST(Types, TypeName) {
    std::string int_name = CLI::detail::type_name<int>();
    EXPECT_EQ("INT", int_name);

    std::string int2_name = CLI::detail::type_name<short>();
    EXPECT_EQ("INT", int2_name);

    std::string uint_name = CLI::detail::type_name<unsigned char>();
    EXPECT_EQ("UINT", uint_name);

    std::string float_name = CLI::detail::type_name<double>();
    EXPECT_EQ("FLOAT", float_name);

    std::string vector_name = CLI::detail::type_name<std::vector<int>>();
    EXPECT_EQ("VECTOR", vector_name);

    std::string text_name = CLI::detail::type_name<std::string>();
    EXPECT_EQ("TEXT", text_name);
    
    std::string text2_name = CLI::detail::type_name<char*>();
    EXPECT_EQ("TEXT", text2_name);
}

TEST(Types, LexicalCastInt) {
    std::string input = "912";
    int x;
    EXPECT_TRUE(CLI::detail::lexical_cast(input, x));
    EXPECT_EQ(912, x);

    unsigned char y;
    std::string overflow_input = std::to_string(UINT64_MAX) + "0";
    EXPECT_FALSE(CLI::detail::lexical_cast(overflow_input, y));

    std::string bad_input = "hello";
    EXPECT_FALSE(CLI::detail::lexical_cast(bad_input, y));
}

TEST(Types, LexicalCastDouble) {
    std::string input = "9.12";
    long double x;
    EXPECT_TRUE(CLI::detail::lexical_cast(input, x));
    EXPECT_FLOAT_EQ(9.12, x);

    std::string bad_input = "hello";
    EXPECT_FALSE(CLI::detail::lexical_cast(bad_input, x));
    
    std::string overflow_input = "1" + std::to_string(LDBL_MAX);
    EXPECT_FALSE(CLI::detail::lexical_cast(overflow_input, x));
}

TEST(Types, LexicalCastString) {
    std::string input = "one";
    std::string output;
    CLI::detail::lexical_cast(input, output);
    EXPECT_EQ(input, output);
}