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/*
 *  yosys -- Yosys Open SYnthesis Suite
 *
 *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
 *  
 *  Permission to use, copy, modify, and/or distribute this software for any
 *  purpose with or without fee is hereby granted, provided that the above
 *  copyright notice and this permission notice appear in all copies.
 *  
 *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 */

#include "kernel/yosys.h"

#include <readline/readline.h>
#include <readline/history.h>

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <libgen.h>
#include <dlfcn.h>
#include <limits.h>
#include <errno.h>

USING_YOSYS_NAMESPACE

int main(int argc, char **argv)
{
	std::string frontend_command = "auto";
	std::string backend_command = "auto";
	std::vector<std::string> passes_commands;
	std::vector<void*> loaded_modules;
	std::string output_filename = "";
	std::string scriptfile = "";
	bool scriptfile_tcl = false;
	bool got_output_filename = false;
	bool print_banner = true;
	bool print_stats = true;
	bool call_abort = false;

	int history_offset = 0;
	std::string history_file;
	if (getenv("HOME") != NULL) {
		history_file = stringf("%s/.yosys_history", getenv("HOME"));
		read_history(history_file.c_str());
		history_offset = where_history();
	}

	int opt;
	while ((opt = getopt(argc, argv, "AQTVSm:f:Hh:b:o:p:l:qv:ts:c:")) != -1)
	{
		switch (opt)
		{
		case 'A':
			call_abort = true;
			break;
		case 'Q':
			print_banner = false;
			break;
		case 'T':
			print_stats = false;
			break;
		case 'V':
			printf("%s\n", yosys_version_str);
			exit(0);
		case 'S':
			passes_commands.push_back("hierarchy");
			passes_commands.push_back("proc");
			passes_commands.push_back("opt");
			passes_commands.push_back("memory");
			passes_commands.push_back("opt");
			passes_commands.push_back("techmap");
			passes_commands.push_back("opt");
			break;
		case 'm':
			loaded_modules.push_back(dlopen(optarg, RTLD_LAZY|RTLD_GLOBAL));
			if (loaded_modules.back() == NULL) {
				fprintf(stderr, "Can't load module `%s': %s\n", optarg, dlerror());
				exit(1);
			}
			break;
		case 'f':
			frontend_command = optarg;
			break;
		case 'H':
			passes_commands.push_back("help");
			break;
		case 'h':
			passes_commands.push_back(stringf("help %s", optarg));
			break;
		case 'b':
			backend_command = optarg;
			break;
		case 'p':
			passes_commands.push_back(optarg);
			break;
		case 'o':
			output_filename = optarg;
			got_output_filename = true;
			break;
		case 'l':
			log_files.push_back(fopen(optarg, "wt"));
			if (log_files.back() == NULL) {
				fprintf(stderr, "Can't open log file `%s' for writing!\n", optarg);
				exit(1);
			}
			break;
		case 'q':
			log_errfile = stderr;
			break;
		case 'v':
			log_errfile = stderr;
			log_verbose_level = atoi(optarg);
			break;
		case 't':
			log_time = true;
			break;
		case 's':
			scriptfile = optarg;
			scriptfile_tcl = false;
			break;
		case 'c':
			scriptfile = optarg;
			scriptfile_tcl = true;
			break;
		default:
			fprintf(stderr, "\n");
			fprintf(stderr, "Usage: %s [-V -S -Q -T -q] [-v <level>[-t] [-l <logfile>] [-o <outfile>] [-f <frontend>] [-h cmd] \\\n", argv[0]);
			fprintf(stderr, "       %*s[{-s|-c} <scriptfile>] [-p <pass> [-p ..]] [-b <backend>] [-m <module_file>] [<infile> [..]]\n", int(strlen(argv[0])+1), "");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -Q\n");
			fprintf(stderr, "        suppress printing of banner (copyright, disclaimer, version)\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -T\n");
			fprintf(stderr, "        suppress printing of footer (log hash, version, timing statistics)\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -q\n");
			fprintf(stderr, "        quiet operation. only write error messages to console\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -v <level>\n");
			fprintf(stderr, "        print log headers up to level <level> to the console. (implies -q)\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -t\n");
			fprintf(stderr, "        annotate all log messages with a time stamp\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -l logfile\n");
			fprintf(stderr, "        write log messages to the specified file\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -o outfile\n");
			fprintf(stderr, "        write the design to the specified file on exit\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -b backend\n");
			fprintf(stderr, "        use this backend for the output file specified on the command line\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -f backend\n");
			fprintf(stderr, "        use the specified front for the input files on the command line\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -H\n");
			fprintf(stderr, "        print the command list\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -h command\n");
			fprintf(stderr, "        print the help message for the specified command\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -s scriptfile\n");
			fprintf(stderr, "        execute the commands in the script file\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -c tcl_scriptfile\n");
			fprintf(stderr, "        execute the commands in the tcl script file (see 'help tcl' for details)\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -p command\n");
			fprintf(stderr, "        execute the commands\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -m module_file\n");
			fprintf(stderr, "        load the specified module (aka plugin)\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -A\n");
			fprintf(stderr, "        will call abort() at the end of the script. useful for debugging\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -V\n");
			fprintf(stderr, "        print version information and exit\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "The option -S is an alias for the following options that perform a simple\n");
			fprintf(stderr, "transformation of the input to a gate-level netlist.\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "    -p hierarchy -p proc -p opt -p memory -p opt -p techmap -p opt\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "For more complex synthesis jobs it is recommended to use the read_* and write_*\n");
			fprintf(stderr, "commands in a script file instead of specifying input and output files on the\n");
			fprintf(stderr, "command line.\n");
			fprintf(stderr, "\n");
			fprintf(stderr, "When no commands, script files or input files are specified on the command\n");
			fprintf(stderr, "line, yosys automatically enters the interactive command mode. Use the 'help'\n");
			fprintf(stderr, "command to get information on the individual commands.\n");
			fprintf(stderr, "\n");
			exit(1);
		}
	}

	if (log_errfile == NULL)
		log_files.push_back(stderr);

	if (print_banner) {
		log("\n");
		log(" /-----------------------------------------------------------------------------\\\n");
		log(" |                                                                             |\n");
		log(" |  yosys -- Yosys Open SYnthesis Suite                                        |\n");
		log(" |                                                                             |\n");
		log(" |  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>                   |\n");
		log(" |                                                                             |\n");
		log(" |  Permission to use, copy, modify, and/or distribute this software for any   |\n");
		log(" |  purpose with or without fee is hereby granted, provided that the above     |\n");
		log(" |  copyright notice and this permission notice appear in all copies.          |\n");
		log(" |                                                                             |\n");
		log(" |  THE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES   |\n");
		log(" |  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF           |\n");
		log(" |  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR    |\n");
		log(" |  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES     |\n");
		log(" |  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN      |\n");
		log(" |  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF    |\n");
		log(" |  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.             |\n");
		log(" |                                                                             |\n");
		log(" \\-----------------------------------------------------------------------------/\n");
		log("\n");
		log(" %s\n", yosys_version_str);
		log("\n");
	}

	yosys_setup();

	if (optind == argc && passes_commands.size() == 0 && scriptfile.empty()) {
		if (!got_output_filename)
			backend_command = "";
		shell(yosys_design);
	}

	while (optind < argc)
		run_frontend(argv[optind++], frontend_command, yosys_design, output_filename == "-" ? &backend_command : NULL, NULL);

	if (!scriptfile.empty()) {
		if (scriptfile_tcl) {
#ifdef YOSYS_ENABLE_TCL
			if (Tcl_EvalFile(yosys_get_tcl_interp(), scriptfile.c_str()) != TCL_OK)
				log_error("TCL interpreter returned an error: %s\n", Tcl_GetStringResult(yosys_get_tcl_interp()));
#else
			log_error("Can't exectue TCL script: this version of yosys is not built with TCL support enabled.\n");
#endif
		} else
			run_frontend(scriptfile, "script", yosys_design, output_filename == "-" ? &backend_command : NULL, NULL);
	}

	for (auto it = passes_commands.begin(); it != passes_commands.end(); it++)
		run_pass(*it, yosys_design);

	if (!backend_command.empty())
		run_backend(output_filename, backend_command, yosys_design);

	delete yosys_design;
	yosys_design = NULL;

#ifdef COVER_ACTIVE
	if (getenv("YOSYS_COVER_DIR") || getenv("YOSYS_COVER_FILE"))
	{
		char filename_buffer[4096];
		FILE *f;

		if (getenv("YOSYS_COVER_DIR")) {
			snprintf(filename_buffer, 4096, "%s/yosys_cover_%d_XXXXXX.txt", getenv("YOSYS_COVER_DIR"), getpid());
			f = fdopen(mkstemps(filename_buffer, 4), "w");
		} else {
			snprintf(filename_buffer, 4096, "%s", getenv("YOSYS_COVER_FILE"));
			f = fopen(filename_buffer, "a+");
		}

		if (f == NULL)
			log_error("Can't create coverage file `%s'.\n", filename_buffer);

		log("<writing coverage file \"%s\">\n", filename_buffer);

		for (auto &it : get_coverage_data())
			fprintf(f, "%-60s %10d %s\n", it.second.first.c_str(), it.second.second, it.first.c_str());

		fclose(f);
	}
#endif

	if (print_stats)
	{
		struct rusage ru_buffer;
		getrusage(RUSAGE_SELF, &ru_buffer);
		log("\nEnd of script. Logfile hash: xxxxxxxxxx, CPU: user %.2fs system %.2fs\n",
				ru_buffer.ru_utime.tv_sec + 1e-6 * ru_buffer.ru_utime.tv_usec,
				ru_buffer.ru_stime.tv_sec + 1e-6 * ru_buffer.ru_stime.tv_usec);
		log("%s\nTime spent:", yosys_version_str);

		int64_t total_ns = 0;
		std::set<std::tuple<int64_t, int, std::string>> timedat;

		for (auto &it : pass_register)
			if (it.second->call_counter) {
				total_ns += it.second->runtime_ns + 1;
				timedat.insert(make_tuple(it.second->runtime_ns + 1, it.second->call_counter, it.first));
			}

		int out_count = 0;
		for (auto it = timedat.rbegin(); it != timedat.rend() && out_count < 4; it++, out_count++) {
			if (out_count >= 2 && (std::get<0>(*it) < 1000000000 || int(100*std::get<0>(*it) / total_ns) < 20)) {
				log(", ...");
				break;
			}
			log("%s %d%% %dx %s (%d sec)", out_count ? "," : "", int(100*std::get<0>(*it) / total_ns),
					std::get<1>(*it), std::get<2>(*it).c_str(), int(std::get<0>(*it) / 1000000000));
		}
		log("%s\n", out_count ? "" : " no commands executed");
	}

	if (call_abort)
		abort();

	if (!history_file.empty()) {
		if (history_offset > 0) {
			history_truncate_file(history_file.c_str(), 100);
			append_history(where_history() - history_offset, history_file.c_str());
		} else
			write_history(history_file.c_str());
	}

	clear_history();
	HIST_ENTRY **hist_list = history_list();
	if (hist_list != NULL)
		free(hist_list);

	yosys_shutdown();

	for (auto mod : loaded_modules)
		dlclose(mod);

	return 0;
}