//
// Automated Testing Framework (atf)
//
// Copyright (c) 2007 The NetBSD Foundation, Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
// CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
// IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
// IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//

#include <cstring>
#include <iostream>

#include <atf-c++.hpp>

#include "config.hpp"
#include "env.hpp"
#include "exceptions.hpp"

static const char *test_value = "env-value";

static struct varnames {
   const char *lc;
   const char *uc;
   bool can_be_empty;
} all_vars[] = {
   { "atf_arch",           "ATF_ARCH",           false },
   { "atf_build_cc",       "ATF_BUILD_CC",       false },
   { "atf_build_cflags",   "ATF_BUILD_CFLAGS",   true  },
   { "atf_build_cpp",      "ATF_BUILD_CPP",      false },
   { "atf_build_cppflags", "ATF_BUILD_CPPFLAGS", true  },
   { "atf_build_cxx",      "ATF_BUILD_CXX",      false },
   { "atf_build_cxxflags", "ATF_BUILD_CXXFLAGS", true  },
   { "atf_confdir",        "ATF_CONFDIR",        false },
   { "atf_includedir",     "ATF_INCLUDEDIR",     false },
   { "atf_libdir",         "ATF_LIBDIR",         false },
   { "atf_libexecdir",     "ATF_LIBEXECDIR",     false },
   { "atf_machine",        "ATF_MACHINE",        false },
   { "atf_pkgdatadir",     "ATF_PKGDATADIR",     false },
   { "atf_shell",          "ATF_SHELL",          false },
   { "atf_workdir",        "ATF_WORKDIR",        false },
   { NULL,                 NULL,                 false }
};

// ------------------------------------------------------------------------
// Auxiliary functions.
// ------------------------------------------------------------------------

namespace tools {
   namespace config {
       void __reinit(void);
   }
}

static
void
set_env_var(const char* name, const char* val)
{
   try {
       tools::env::set(name, val);
   } catch (const tools::system_error&) {
       ATF_FAIL(std::string("set_env_var(") + name + ", " + val +
                ") failed");
   }
}

static
void
unset_env_var(const char* name)
{
   try {
       tools::env::unset(name);
   } catch (const tools::system_error&) {
       ATF_FAIL(std::string("unset_env_var(") + name + ") failed");
   }
}

static
size_t
all_vars_count(void)
{
   size_t count = 0;
   for (const struct varnames* v = all_vars; v->lc != NULL; v++)
       count++;
   return count;
}

static
void
unset_all(void)
{
   for (const struct varnames* v = all_vars; v->lc != NULL; v++)
       unset_env_var(v->uc);
}

static
void
compare_one(const char* var, const char* expvalue)
{
   std::cout << "Checking that " << var << " is set to " << expvalue << "\n";

   for (const struct varnames* v = all_vars; v->lc != NULL; v++) {
       if (std::strcmp(v->lc, var) == 0)
           ATF_REQUIRE_EQ(tools::config::get(v->lc), test_value);
       else
           ATF_REQUIRE(tools::config::get(v->lc) != test_value);
   }
}

// ------------------------------------------------------------------------
// Test cases for the free functions.
// ------------------------------------------------------------------------

ATF_TEST_CASE(get);
ATF_TEST_CASE_HEAD(get)
{
   set_md_var("descr", "Tests the config::get function");
}
ATF_TEST_CASE_BODY(get)
{
   // Unset all known environment variables and make sure the built-in
   // values do not match the bogus value we will use for testing.
   unset_all();
   tools::config::__reinit();
   for (const struct varnames* v = all_vars; v->lc != NULL; v++)
       ATF_REQUIRE(tools::config::get(v->lc) != test_value);

   // Test the behavior of empty values.
   for (const struct varnames* v = all_vars; v->lc != NULL; v++) {
       unset_all();
       if (!tools::config::get(v->lc).empty()) {
           set_env_var(v->uc, "");
           tools::config::__reinit();
           if (v->can_be_empty)
               ATF_REQUIRE(tools::config::get(v->lc).empty());
           else
               ATF_REQUIRE(!tools::config::get(v->lc).empty());
       }
   }

   // Check if the ATF_ARCH variable is recognized.
   for (const struct varnames* v = all_vars; v->lc != NULL; v++) {
       unset_all();
       set_env_var(v->uc, test_value);
       tools::config::__reinit();
       compare_one(v->lc, test_value);
   }
}

ATF_TEST_CASE(get_all);
ATF_TEST_CASE_HEAD(get_all)
{
   set_md_var("descr", "Tests the config::get_all function");
}
ATF_TEST_CASE_BODY(get_all)
{
   tools::config::__reinit();

   // Check that the valid variables, and only those, are returned.
   std::map< std::string, std::string > vars = tools::config::get_all();
   ATF_REQUIRE_EQ(vars.size(), all_vars_count());
   for (const struct varnames* v = all_vars; v->lc != NULL; v++)
       ATF_REQUIRE(vars.find(v->lc) != vars.end());
}

ATF_TEST_CASE(has);
ATF_TEST_CASE_HEAD(has)
{
   set_md_var("descr", "Tests the config::has function");
}
ATF_TEST_CASE_BODY(has)
{
   tools::config::__reinit();

   // Check for all the variables that must exist.
   for (const struct varnames* v = all_vars; v->lc != NULL; v++)
       ATF_REQUIRE(tools::config::has(v->lc));

   // Same as above, but using uppercase (which is incorrect).
   for (const struct varnames* v = all_vars; v->lc != NULL; v++)
       ATF_REQUIRE(!tools::config::has(v->uc));

   // Check for some other variables that cannot exist.
   ATF_REQUIRE(!tools::config::has("foo"));
   ATF_REQUIRE(!tools::config::has("BAR"));
   ATF_REQUIRE(!tools::config::has("atf_foo"));
   ATF_REQUIRE(!tools::config::has("ATF_BAR"));
   ATF_REQUIRE(!tools::config::has("atf_shel"));
   ATF_REQUIRE(!tools::config::has("atf_shells"));
}

// ------------------------------------------------------------------------
// Main.
// ------------------------------------------------------------------------

ATF_INIT_TEST_CASES(tcs)
{
   // Add the test cases for the free functions.
   ATF_ADD_TEST_CASE(tcs, has);
   ATF_ADD_TEST_CASE(tcs, get);
   ATF_ADD_TEST_CASE(tcs, get_all);
}

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