/* Copyright (c) 2002-2013 Pigeonhole authors, see the included COPYING file
 */

#include "lib.h"
#include "istream.h"

#include "sieve-common.h"
#include "sieve-commands.h"
#include "sieve-message.h"
#include "sieve-validator.h"
#include "sieve-generator.h"
#include "sieve-interpreter.h"
#include "sieve-code.h"
#include "sieve-binary.h"
#include "sieve-dump.h"

#include "testsuite-common.h"
#include "testsuite-smtp.h"
#include "testsuite-mailstore.h"

/*
 * Commands
 */

/* Test_message command
 *
 * Syntax:
 *   test_message ( :smtp / :mailbox <mailbox: string> ) <index: number>
 */

static bool cmd_test_message_registered
	(struct sieve_validator *valdtr, const struct sieve_extension *ext,
		struct sieve_command_registration *cmd_reg);
static bool cmd_test_message_validate
	(struct sieve_validator *valdtr, struct sieve_command *cmd);
static bool cmd_test_message_generate
	(const struct sieve_codegen_env *cgenv, struct sieve_command *ctx);

const struct sieve_command_def cmd_test_message = {
	"test_message",
	SCT_HYBRID,
	1, 0, FALSE, FALSE,
	cmd_test_message_registered,
	NULL,
	cmd_test_message_validate,
	NULL,
	cmd_test_message_generate,
	NULL
};

/* Test_message_print command
 *
 * Syntax:
 *   test_message_print
 */

static bool cmd_test_message_print_generate
	(const struct sieve_codegen_env *cgenv, struct sieve_command *cmd);

const struct sieve_command_def cmd_test_message_print = {
	"test_message_print",
	SCT_COMMAND,
	0, 0, FALSE, FALSE,
	NULL, NULL, NULL, NULL,
	cmd_test_message_print_generate
	, NULL
};


/*
 * Operations
 */

/* Test_message_smtp operation */

static bool cmd_test_message_smtp_operation_dump
	(const struct sieve_dumptime_env *denv, sieve_size_t *address);
static int cmd_test_message_smtp_operation_execute
	(const struct sieve_runtime_env *renv, sieve_size_t *address);

const struct sieve_operation_def test_message_smtp_operation = {
	"TEST_MESSAGE_SMTP",
	&testsuite_extension,
	TESTSUITE_OPERATION_TEST_MESSAGE_SMTP,
	cmd_test_message_smtp_operation_dump,
	cmd_test_message_smtp_operation_execute
};

/* Test_message_mailbox operation */

static bool cmd_test_message_mailbox_operation_dump
	(const struct sieve_dumptime_env *denv, sieve_size_t *address);
static int cmd_test_message_mailbox_operation_execute
	(const struct sieve_runtime_env *renv, sieve_size_t *address);

const struct sieve_operation_def test_message_mailbox_operation = {
	"TEST_MESSAGE_MAILBOX",
	&testsuite_extension,
	TESTSUITE_OPERATION_TEST_MESSAGE_MAILBOX,
	cmd_test_message_mailbox_operation_dump,
	cmd_test_message_mailbox_operation_execute
};

/* Test_message_print operation */

static bool cmd_test_message_print_operation_dump
	(const struct sieve_dumptime_env *denv, sieve_size_t *address);
static int cmd_test_message_print_operation_execute
	(const struct sieve_runtime_env *renv, sieve_size_t *address);

const struct sieve_operation_def test_message_print_operation = {
	"TEST_MESSAGE_PRINT",
	&testsuite_extension,
	TESTSUITE_OPERATION_TEST_MESSAGE_PRINT,
	cmd_test_message_print_operation_dump,
	cmd_test_message_print_operation_execute
};

/*
 * Compiler context data
 */

enum test_message_source {
	MSG_SOURCE_SMTP,
	MSG_SOURCE_MAILBOX,
	MSG_SOURCE_LAST
};

const struct sieve_operation_def *test_message_operations[] = {
	&test_message_smtp_operation,
	&test_message_mailbox_operation
};

struct cmd_test_message_context_data {
	enum test_message_source msg_source;
	const char *folder;
};

#define CMD_TEST_MESSAGE_ERROR_DUP_TAG \
	"exactly one of the ':smtp' or ':folder' tags must be specified " \
	"for the test_message command, but more were found"

/*
 * Command tags
 */

static bool cmd_test_message_validate_smtp_tag
	(struct sieve_validator *valdtr, struct sieve_ast_argument **arg,
		struct sieve_command *cmd);
static bool cmd_test_message_validate_folder_tag
	(struct sieve_validator *valdtr, struct sieve_ast_argument **arg,
		struct sieve_command *cmd);

static const struct sieve_argument_def test_message_smtp_tag = {
	"smtp",
	NULL,
	cmd_test_message_validate_smtp_tag,
	NULL, NULL, NULL
};

static const struct sieve_argument_def test_message_folder_tag = {
	"folder",
	NULL,
	cmd_test_message_validate_folder_tag,
	NULL, NULL, NULL
};

static bool cmd_test_message_registered
(struct sieve_validator *valdtr, const struct sieve_extension *ext,
	struct sieve_command_registration *cmd_reg)
{
	/* Register our tags */
	sieve_validator_register_tag
		(valdtr, cmd_reg, ext, &test_message_folder_tag, 0);
	sieve_validator_register_tag
		(valdtr, cmd_reg, ext, &test_message_smtp_tag, 0);

	return TRUE;
}

static struct cmd_test_message_context_data *cmd_test_message_validate_tag
(struct sieve_validator *valdtr, struct sieve_ast_argument **arg,
	struct sieve_command *cmd)
{
	struct cmd_test_message_context_data *ctx_data =
		(struct cmd_test_message_context_data *) cmd->data;

	if ( ctx_data != NULL ) {
		sieve_argument_validate_error
			(valdtr, *arg, CMD_TEST_MESSAGE_ERROR_DUP_TAG);
		return NULL;
	}

	ctx_data = p_new
		(sieve_command_pool(cmd), struct cmd_test_message_context_data, 1);
	cmd->data = ctx_data;

	/* Delete this tag */
	*arg = sieve_ast_arguments_detach(*arg, 1);

	return ctx_data;
}

static bool cmd_test_message_validate_smtp_tag
(struct sieve_validator *valdtr, struct sieve_ast_argument **arg,
	struct sieve_command *cmd)
{
	struct cmd_test_message_context_data *ctx_data =
		cmd_test_message_validate_tag(valdtr, arg, cmd);

	/* Return value is NULL on error */
	if ( ctx_data == NULL ) return FALSE;

	/* Assign chosen message source */
	ctx_data->msg_source = MSG_SOURCE_SMTP;

	return TRUE;
}

static bool cmd_test_message_validate_folder_tag
(struct sieve_validator *valdtr, struct sieve_ast_argument **arg,
	struct sieve_command *cmd)
{
	struct sieve_ast_argument *tag = *arg;
	struct cmd_test_message_context_data *ctx_data =
		cmd_test_message_validate_tag(valdtr, arg, cmd);

	/* Return value is NULL on error */
	if ( ctx_data == NULL ) return FALSE;

	/* Assign chose message source */
	ctx_data->msg_source = MSG_SOURCE_MAILBOX;

	/* Check syntax:
	 *   :folder string
	 */
	if ( !sieve_validate_tag_parameter
		(valdtr, cmd, tag, *arg, NULL, 0, SAAT_STRING, FALSE) ) {
		return FALSE;
	}

	/* Skip parameter */
	*arg = sieve_ast_argument_next(*arg);

	return TRUE;
}

/*
 * Validation
 */

static bool cmd_test_message_validate
(struct sieve_validator *valdtr, struct sieve_command *cmd)
{
	struct sieve_ast_argument *arg = cmd->first_positional;

	if ( cmd->data == NULL ) {
		sieve_command_validate_error(valdtr, cmd,
			"the test_message command requires either the :smtp or the :mailbox tag "
			"to be specified");
		return FALSE;
	}

	if ( !sieve_validate_positional_argument
		(valdtr, cmd, arg, "index", 1, SAAT_NUMBER) ) {
		return FALSE;
	}

	return sieve_validator_argument_activate(valdtr, cmd, arg, FALSE);
}

/*
 * Code generation
 */

static bool cmd_test_message_generate
(const struct sieve_codegen_env *cgenv, struct sieve_command *cmd)
{
	struct cmd_test_message_context_data *ctx_data =
		(struct cmd_test_message_context_data *) cmd->data;

	i_assert( ctx_data->msg_source < MSG_SOURCE_LAST );

	/* Emit operation */
	sieve_operation_emit(cgenv->sblock, cmd->ext,
		test_message_operations[ctx_data->msg_source]);

	/* Emit is_test flag */
	sieve_binary_emit_byte(cgenv->sblock, ( cmd->ast_node->type == SAT_TEST ));

 	/* Generate arguments */
	if ( !sieve_generate_arguments(cgenv, cmd, NULL) )
		return FALSE;

	return TRUE;
}

static bool cmd_test_message_print_generate
(const struct sieve_codegen_env *cgenv, struct sieve_command *cmd)
{
	/* Emit operation */
	sieve_operation_emit
		(cgenv->sblock, cmd->ext, &test_message_print_operation);
	return TRUE;
}

/*
 * Code dump
 */

static bool cmd_test_message_smtp_operation_dump
(const struct sieve_dumptime_env *denv, sieve_size_t *address)
{
	unsigned int is_test;

	if ( !sieve_binary_read_byte(denv->sblock, address, &is_test) )
		return FALSE;

	sieve_code_dumpf(denv, "TEST_MESSAGE_SMTP (%s):",
		( is_test ? "TEST" : "COMMAND" ));

	sieve_code_descend(denv);

	return sieve_opr_number_dump(denv, address, "index");
}

static bool cmd_test_message_mailbox_operation_dump
(const struct sieve_dumptime_env *denv, sieve_size_t *address)
{
	unsigned int is_test;

	if ( !sieve_binary_read_byte(denv->sblock, address, &is_test) )
		return FALSE;

	sieve_code_dumpf(denv, "TEST_MESSAGE_MAILBOX (%s):",
		( is_test ? "TEST" : "COMMAND" ));

	sieve_code_descend(denv);

	return
		sieve_opr_string_dump(denv, address, "folder") &&
		sieve_opr_number_dump(denv, address, "index");
}

static bool cmd_test_message_print_operation_dump
(const struct sieve_dumptime_env *denv, sieve_size_t *address ATTR_UNUSED)
{
	sieve_code_dumpf(denv, "TEST_MESSAGE_PRINT");

	return TRUE;
}


/*
 * Intepretation
 */

static int cmd_test_message_smtp_operation_execute
(const struct sieve_runtime_env *renv, sieve_size_t *address)
{
	sieve_number_t msg_index;
	unsigned int is_test = 0;
	bool result;
	int ret;

	/*
	 * Read operands
	 */

	/* Is test */

	if ( !sieve_binary_read_byte(renv->sblock, address, &is_test) ) {
		sieve_runtime_trace_error(renv, "invalid is_test flag");
		return SIEVE_EXEC_BIN_CORRUPT;
	}

	/* Index */

	if ( (ret=sieve_opr_number_read(renv, address, "index", &msg_index)) <= 0 )
		return ret;

	/*
	 * Perform operation
	 */

	if ( is_test ) {
		if ( sieve_runtime_trace_active(renv, SIEVE_TRLVL_TESTS) ) {
			sieve_runtime_trace(renv, 0,
				"testsuite: test_message test");
			sieve_runtime_trace_descend(renv);
			sieve_runtime_trace(renv, 0,
				"check and retrieve smtp message [index=%d]", msg_index);
		}
	} else {
		if ( sieve_runtime_trace_active(renv, SIEVE_TRLVL_COMMANDS) ) {
			sieve_runtime_trace(renv, 0,
				"testsuite: test_message command");
			sieve_runtime_trace_descend(renv);
			sieve_runtime_trace(renv, 0,
				"retrieve smtp message [index=%d]", msg_index);
		}
	}

	result = testsuite_smtp_get(renv, msg_index);

	if ( is_test ) {
		sieve_interpreter_set_test_result(renv->interp, result);
		return SIEVE_EXEC_OK;
	}

	if ( !result )
		testsuite_test_failf("no outgoing SMTP message with index %d", msg_index);

	return SIEVE_EXEC_OK;
}

static int cmd_test_message_mailbox_operation_execute
(const struct sieve_runtime_env *renv, sieve_size_t *address)
{
	string_t *folder;
	sieve_number_t msg_index;
	unsigned int is_test = 0;
	bool result;
	int ret;

	/*
	 * Read operands
	 */

	/* Is test */
	if ( !sieve_binary_read_byte(renv->sblock, address, &is_test) ) {
		sieve_runtime_trace_error(renv, "invalid is_test flag");
		return SIEVE_EXEC_BIN_CORRUPT;
	}

	/* Folder */
	if ( (ret=sieve_opr_string_read(renv, address, "folder", &folder)) <= 0 )
		return ret;

	/* Index */
	if ( (ret=sieve_opr_number_read(renv, address, "index", &msg_index)) <= 0 )
		return ret;

	/*
	 * Perform operation
	 */

	if ( is_test ) {
		if ( sieve_runtime_trace_active(renv, SIEVE_TRLVL_TESTS) ) {
			sieve_runtime_trace(renv, 0,
				"testsuite: test_message test");
			sieve_runtime_trace_descend(renv);
			sieve_runtime_trace(renv, 0,
				"check and retrieve mailbox message [mailbox=`%s' index=%d]",
				str_c(folder), msg_index);
		}
	} else {
		if ( sieve_runtime_trace_active(renv, SIEVE_TRLVL_COMMANDS) ) {
			sieve_runtime_trace(renv, 0,
				"testsuite: test_message command");
			sieve_runtime_trace_descend(renv);
			sieve_runtime_trace(renv, 0,
				"retrieve mailbox message [mailbox=`%s' index=%d]",
				str_c(folder), msg_index);
		}
	}

	result = testsuite_mailstore_mail_index(renv, str_c(folder), msg_index);

	if ( is_test ) {
		sieve_interpreter_set_test_result(renv->interp, result);
		return SIEVE_EXEC_OK;
	}

	if ( !result )
		testsuite_test_failf("no message in folder '%s' with index %d",
			str_c(folder), msg_index);

	return SIEVE_EXEC_OK;
}

static int cmd_test_message_print_operation_execute
(const struct sieve_runtime_env *renv, sieve_size_t *address ATTR_UNUSED)
{
	struct mail *mail = sieve_message_get_mail(renv->msgctx);
	struct istream *input;
	const unsigned char *data;
	size_t size;

	if (mail_get_stream(mail, NULL, NULL, &input) < 0) {
		sieve_runtime_error(renv, NULL,
			"test_message_print: failed to read current message");
		return SIEVE_EXEC_OK;
	}

	printf("\n--MESSAGE: \n");

	/* Pipe the message to the outgoing SMTP transport */
	while (i_stream_read_data(input, &data, &size, 0) > 0) {
		ssize_t wret;

		if ( (wret=write(1, data, size)) <= 0 )
			break;
		i_stream_skip(input, wret);
	}
	printf("\n--MESSAGE--\n");

	return SIEVE_EXEC_OK;
}