/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2009, Digium, Inc.
 *
 * Tilghman Lesher <tlesher AT digium DOT com>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 *
 * \brief Substitution Test
 *
 * \author\verbatim Tilghman Lesher <tlesher AT digium DOT com> \endverbatim
 *
 * \ingroup tests
 */

/*** MODULEINFO
	<depend>TEST_FRAMEWORK</depend>
	<depend>func_curl</depend>
	<support_level>core</support_level>
 ***/

#include "asterisk.h"

#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/lock.h"
#include "asterisk/app.h"
#include "asterisk/strings.h"
#include "asterisk/stringfields.h"
#include "asterisk/threadstorage.h"
#include "asterisk/test.h"
#include "asterisk/vector.h"

static enum ast_test_result_state test_chan_integer(struct ast_test *test,
		struct ast_channel *c, int *ifield, const char *expression)
{
	int i, okay = 1, value1 = -1, value2 = -1;
	char workspace[4096];
	struct ast_str *str = ast_str_create(16);

	for (i = 0; i < 256; i++) {
		*ifield = i;
		ast_str_substitute_variables(&str, 0, c, expression);
		pbx_substitute_variables_helper(c, expression, workspace, sizeof(workspace));

		if (sscanf(workspace, "%d", &value1) != 1 || value1 != i || sscanf(ast_str_buffer(str), "%d", &value2) != 1 || value2 != i) {
			ast_test_status_update(test, "%s != %s and/or %d != %d != %d\n", ast_str_buffer(str), workspace, value1, value2, i);
			okay = 0;
		}
	}
	ast_test_status_update(test, "Tested '%s' . . . . . %s\n", expression, okay ? "passed" : "FAILED");

	ast_free(str);

	return okay ? AST_TEST_PASS : AST_TEST_FAIL;
}

static enum ast_test_result_state test_chan_integer_accessor(struct ast_test *test,
		struct ast_channel *c, void (*setter)(struct ast_channel *, int),const char *expression)
{
	int i, okay = 1, value1 = -1, value2 = -1;
	char workspace[4096];
	struct ast_str *str = ast_str_create(16);

	for (i = 0; i < 256; i++) {
		setter(c, i);
		ast_str_substitute_variables(&str, 0, c, expression);
		pbx_substitute_variables_helper(c, expression, workspace, sizeof(workspace));

		if (sscanf(workspace, "%d", &value1) != 1 || value1 != i || sscanf(ast_str_buffer(str), "%d", &value2) != 1 || value2 != i) {
			ast_test_status_update(test, "%s != %s and/or %d != %d != %d\n", ast_str_buffer(str), workspace, value1, value2, i);
			okay = 0;
		}
	}
	ast_test_status_update(test, "Tested '%s' . . . . . %s\n", expression, okay ? "passed" : "FAILED");

	ast_free(str);

	return okay ? AST_TEST_PASS : AST_TEST_FAIL;
}

static enum ast_test_result_state test_chan_string(struct ast_test *test,
		struct ast_channel *c, void (*setter)(struct ast_channel *, const char *),
		const char *(*getter)(const struct ast_channel *), const char *expression)
{
	const char *values[] = { "one", "three", "reallylongdinosaursoundingthingwithwordsinit" };
	int i, okay = 1;
	char workspace[4096];
	struct ast_str *str = ast_str_create(16);

	for (i = 0; i < ARRAY_LEN(values); i++) {
		setter(c, values[i]);
		ast_str_substitute_variables(&str, 0, c, expression);
		pbx_substitute_variables_helper(c, expression, workspace, sizeof(workspace));

		if (strcmp(getter(c), ast_str_buffer(str)) != 0 || strcmp(getter(c), workspace) != 0) {
			ast_test_status_update(test, "%s != %s != %s\n", getter(c), ast_str_buffer(str), workspace);
			okay = 0;
		}
	}
	ast_test_status_update(test, "Tested '%s' . . . . . %s\n",
		expression, okay ? "passed" : "FAILED");

	ast_free(str);

	return okay ? AST_TEST_PASS : AST_TEST_FAIL;
}

static enum ast_test_result_state test_chan_variable(struct ast_test *test,
		struct ast_channel *c, const char *varname)
{
	const char *values[] = { "one", "three", "reallylongdinosaursoundingthingwithwordsinit" };
	int i, okay = 1;
	char workspace[4096];
	struct ast_str *str = ast_str_create(16);
	struct ast_str *var = ast_str_create(16);

	ast_str_set(&var, 0, "${%s}", varname);
	for (i = 0; i < ARRAY_LEN(values); i++) {
		pbx_builtin_setvar_helper(c, varname, values[i]);
		ast_str_substitute_variables(&str, 0, c, ast_str_buffer(var));
		pbx_substitute_variables_helper(c, ast_str_buffer(var), workspace, sizeof(workspace));

		if (strcmp(values[i], ast_str_buffer(str)) != 0 || strcmp(values[i], workspace) != 0) {
			ast_test_status_update(test, "%s != %s != %s\n",
					values[i], ast_str_buffer(str), workspace);
			okay = 0;
		}
	}
	ast_test_status_update(test, "Tested '%s' . . . . . %s\n",
		ast_str_buffer(var), okay ? "passed" : "FAILED");

	ast_free(str);
	ast_free(var);

	return okay ? AST_TEST_PASS : AST_TEST_FAIL;
}

static enum ast_test_result_state test_chan_function(struct ast_test *test,
		struct ast_channel *c, const char *expression)
{
	int okay = 1;
	char workspace[4096];
	struct ast_str *str = ast_str_create(16);

	ast_str_substitute_variables(&str, 0, c, expression);
	pbx_substitute_variables_helper(c, expression, workspace, sizeof(workspace));

	if (strcmp(workspace, ast_str_buffer(str)) != 0) {
		ast_test_status_update(test, "expr: '%s' ... %s != %s\n",
				expression, ast_str_buffer(str), workspace);
		okay = 0;
	}
	ast_test_status_update(test, "Tested '%s' . . . . . %s\n",
		expression, okay ? "passed" : "FAILED");

	ast_free(str);

	return okay ? AST_TEST_PASS : AST_TEST_FAIL;
}

static enum ast_test_result_state test_2way_function(struct ast_test *test,
		struct ast_channel *c, const char *encode1, const char *encode2,
		const char *decode1, const char *decode2)
{
	struct ast_str *str = ast_str_create(16), *expression = ast_str_alloca(120);
	int okay;

	ast_str_set(&expression, 0, "%s%s%s", encode1, "foobarbaz", encode2);
	ast_str_substitute_variables(&str, 0, c, ast_str_buffer(expression));
	ast_str_set(&expression, 0, "%s%s%s", decode1, ast_str_buffer(str), decode2);
	ast_str_substitute_variables(&str, 0, c, ast_str_buffer(expression));

	okay = !strcmp(ast_str_buffer(str), "foobarbaz");
	if (!okay) {
		ast_test_status_update(test, "'%s' != 'foobarbaz'\n",
				ast_str_buffer(str));
	}
	ast_test_status_update(test, "Tested '%s%s' and '%s%s' . . . . . %s\n",
		encode1, encode2, decode1, decode2,
		okay ? "passed" : "FAILED");

	ast_free(str);

	return okay ? AST_TEST_PASS : AST_TEST_FAIL;
}

static enum ast_test_result_state test_expected_result(struct ast_test *test,
		struct ast_channel *c, const char *expression, const char *result)
{
	struct ast_str *str = ast_str_create(16);
	int okay;

	ast_str_substitute_variables(&str, 0, c, expression);

	okay = !strcmp(ast_str_buffer(str), result);
	if (!okay) {
		ast_test_status_update(test, "'%s' != '%s'\n",
				ast_str_buffer(str), result);
	}
	ast_test_status_update(test, "Tested '%s' ('%s') == '%s' . . . . . %s\n",
		ast_str_buffer(str), expression, result,
		okay ? "passed" : "FAILED");

	ast_free(str);

	return okay ? AST_TEST_PASS : AST_TEST_FAIL;
}

AST_TEST_DEFINE(test_substitution)
{
	struct ast_channel *c;
	int i;
	enum ast_test_result_state res = AST_TEST_PASS;
	struct ast_vector_string *funcs;

	switch (cmd) {
	case TEST_INIT:
		info->name = "test_substitution";
		info->category = "/main/pbx/";
		info->summary = "Test variable and function substitution";
		info->description =
			"This test executes a variety of variable and function substitutions "
			"and ensures that the expected results are received.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	ast_test_status_update(test, "Testing variable substitution ...\n");

	c = ast_channel_alloc(0, 0, "", "", "", "", "", NULL, NULL, 0, "Test/substitution");
	ast_channel_unlock(c);

#define TEST(t) if (t == AST_TEST_FAIL) { res = AST_TEST_FAIL; }
#if 0
	/*
	 * We can no longer test the CALLINGPRES value this way because it is now
	 * a calculated value from the name and number presentation information to
	 * get a combined presentation value.
	 */
	TEST(test_chan_integer(test, c, &c->caller.id.number.presentation, "${CALLINGPRES}"));
#endif
	TEST(test_chan_integer(test, c, &ast_channel_caller(c)->ani2, "${CALLINGANI2}"));
	TEST(test_chan_integer(test, c, &ast_channel_caller(c)->id.number.plan, "${CALLINGTON}"));
	TEST(test_chan_integer(test, c, &ast_channel_dialed(c)->transit_network_select, "${CALLINGTNS}"));
	TEST(test_chan_integer_accessor(test, c, ast_channel_hangupcause_set, "${HANGUPCAUSE}"));
	TEST(test_chan_integer_accessor(test, c, ast_channel_priority_set, "${PRIORITY}"));
	TEST(test_chan_string(test, c, ast_channel_context_set, ast_channel_context, "${CONTEXT}"));
	TEST(test_chan_string(test, c, ast_channel_exten_set, ast_channel_exten, "${EXTEN}"));
	TEST(test_chan_variable(test, c, "CHANNEL(language)"));
	TEST(test_chan_variable(test, c, "CHANNEL(musicclass)"));
	TEST(test_chan_variable(test, c, "CHANNEL(parkinglot)"));
	TEST(test_chan_variable(test, c, "CALLERID(name)"));
	TEST(test_chan_variable(test, c, "CURLOPT(proxyuserpwd)"));
	TEST(test_chan_variable(test, c, "CDR(foo)"));
	TEST(test_chan_variable(test, c, "ENV(foo)"));
	TEST(test_chan_variable(test, c, "GLOBAL(foo)"));
	TEST(test_chan_variable(test, c, "GROUP()"));
	TEST(test_2way_function(test, c, "${AES_ENCRYPT(abcdefghijklmnop,", ")}", "${AES_DECRYPT(abcdefghijklmnop,", ")}"));
	TEST(test_2way_function(test, c, "${BASE64_ENCODE(", ")}", "${BASE64_DECODE(", ")}"));
	pbx_builtin_setvar_helper(c, "foo", "123");
	pbx_builtin_setvar_helper(c, "bar", "foo");
	pbx_builtin_setvar_helper(c, "baz", "fo");
	TEST(test_expected_result(test, c, "${foo}${foo}", "123123"));
	TEST(test_expected_result(test, c, "A${foo}A${foo}A", "A123A123A"));
	TEST(test_expected_result(test, c, "A${${bar}}A", "A123A"));
	TEST(test_expected_result(test, c, "A${${baz}o}A", "A123A"));
	TEST(test_expected_result(test, c, "A${${baz}o:1}A", "A23A"));
	TEST(test_expected_result(test, c, "A${${baz}o:1:1}A", "A2A"));
	TEST(test_expected_result(test, c, "A${${baz}o:1:-1}A", "A2A"));
	TEST(test_expected_result(test, c, "A${${baz}o:-1:1}A", "A3A"));
	TEST(test_expected_result(test, c, "A${${baz}o:-2:1}A", "A2A"));
	TEST(test_expected_result(test, c, "A${${baz}o:-2:-1}A", "A2A"));
	pbx_builtin_setvar_helper(c, "list1", "ab&cd&ef");
	TEST(test_expected_result(test, c, "${LISTFILTER(list1,&,ab)}", "cd&ef"));
	TEST(test_expected_result(test, c, "${LISTFILTER(list1,&,cd)}", "ab&ef"));
	TEST(test_expected_result(test, c, "${LISTFILTER(list1,&,ef)}", "ab&cd"));
	TEST(test_expected_result(test, c, "${LISTFILTER(list1,&,gh)}", "ab&cd&ef"));
	TEST(test_expected_result(test, c, "${LISTFILTER(list1,&,c)}", "ab&cd&ef"));
	TEST(test_expected_result(test, c, "${LISTFILTER(list1,&,d)}", "ab&cd&ef"));
	pbx_builtin_setvar_helper(c, "list2", "ab");
	TEST(test_expected_result(test, c, "${LISTFILTER(list2,&,ab)}", ""));
	pbx_builtin_setvar_helper(c, "list_empty", "");
	TEST(test_expected_result(test, c, "${LISTFILTER(list_empty,&,ab)}", ""));
	TEST(test_expected_result(test, c, "${SHELL(printf '%d' 123)},${SHELL(printf '%d' 456)}", "123,456"));
	TEST(test_expected_result(test, c, "${foo},${CDR(answer)},${SHELL(printf '%d' 456)}", "123,,456"));
	TEST(test_expected_result(test, c, "${foo},${CDR(answer,u)},${SHELL(printf '%d' 456)}", "123,0.000000,456"));
	TEST(test_expected_result(test, c, "${foo},${this_does_not_exist},${THIS_DOES_NOT_EXIST(either)}", "123,,"));
#undef TEST

	/* For testing dialplan functions */
	funcs = ast_cli_completion_vector("core show function", "");

	/* Skip "best match" element 0 */
	for (i = 1; funcs && i < AST_VECTOR_SIZE(funcs); i++) {
		char *cmd = AST_VECTOR_GET(funcs, i);

		if (strcmp(cmd, "CHANNEL") && strcmp(cmd, "CALLERID") && strncmp(cmd, "CURL", 4) &&
				strncmp(cmd, "AES", 3) && strncmp(cmd, "BASE64", 6) &&
				strcmp(cmd, "CDR") && strcmp(cmd, "ENV") && strcmp(cmd, "GLOBAL") &&
				strcmp(cmd, "GROUP") && strcmp(cmd, "CUT") && strcmp(cmd, "LISTFILTER") &&
				strcmp(cmd, "PP_EACH_EXTENSION") && strcmp(cmd, "SET")) {
			struct ast_custom_function *acf = ast_custom_function_find(cmd);
			if (acf->read && acf->read2) {
				char expression[80];
				snprintf(expression, sizeof(expression), "${%s(foo)}", cmd);
				if (AST_TEST_FAIL == test_chan_function(test, c, expression)) {
					res = AST_TEST_FAIL;
				}
			}
		}
	}

	if (funcs) {
		AST_VECTOR_CALLBACK_VOID(funcs, ast_free);
		AST_VECTOR_PTR_FREE(funcs);
	}
	ast_hangup(c);

	return res;
}

static int unload_module(void)
{
	AST_TEST_UNREGISTER(test_substitution);
	return 0;
}

static int load_module(void)
{
	AST_TEST_REGISTER(test_substitution);
	return AST_MODULE_LOAD_SUCCESS;
}

AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Substitution tests");