const PADDING = 24;

for(var i = 1; i < ARGV.length; i++) {
	if(ARGV[i] == "--help") {
		var keys;

		console.log("PMake " + pmake.VERSION + " - Pyrite's build script generator");
		console.log("");
		console.log("Usage: " + ARGV[0] + " [options]");

		keys = Object.keys(pmake.options_category);
		for(var i = 0; i < keys.length; i++) {
			console.log("");
			console.log("OPTIONS - " + keys[i]);

			var keys2 = Object.keys(pmake.options_category[keys[i]]);
			for(var j = 0; j < keys2.length; j++) {
				const opt  = pmake.options_category[keys[i]][keys2[j]];
				var   arg  = "";
				var   opts = [];

				if(opt.option) {
					arg = "=" + opt.option;
				}

				console.log("  --" + keys2[j] + arg + " ".repeat(PADDING - keys2[j].length - 2 - arg.length) + opt.description);
				if(!opt.options) {
				} else if((typeof opt.options) == "function") {
					opts = opt.options();
				} else {
					opts = opt.options;
				}

				if(opts.length > 0) {
					for(var k = 0; k < opts.length; k++) {
						console.log("      " + opts[k]);
					}
					console.log("");
				}
			}
		}
		process.exit(0);
	} else if(ARGV[i].startsWith("--")) {
		var args = ARGV[i].split("=");

		args[0] = args[0].substr(2);

		if(pmake.options[args[0]]) {
			var opts = pmake.options[args[0]].options;
			var opt	 = pmake.options[args[0]].option;

			if(opts) {
				if((typeof opts) == "function") opts = opts();
			}

			if(opts && !args[1]) {
				console.log("Error: no value specified for option '" + args[0] + "'");
				process.exit(1);
			} else if(opts && !opts.includes(args[1])) {
				console.log("Error: invalid value '" + args[1] + "' for option '" + args[0] + "'");
				process.exit(1);
			} else if(opts || opt) {
				pmake.options[args[0]].action(args[1].replace(/^~(\/?)/, fs.home + "$1"));
			} else {
				pmake.options[args[0]].action();
			}
		} else {
			console.log("Error: invalid option '" + args[0] + "'");
			process.exit(1);
		}
	}
}

if(!this.main) {
	console.log("No main function was defined!");
	process.exit(1);
}
main();

(function() {
function makefile(target) {
	return target.base + "/" + target.target + ".make";
}

function make(output) {
	const targets = pmake.resolveProjects(pmake.projects);

	function target_map(x) {
		return x.target;
	}

	var mk = new pmake.File(output, "w");

	mk.write("# This file was auto-generated. Do not edit manually!\n");
	mk.write("\n");
	mk.write("SILENT = @\n");
	if(WIN32) {
		mk.write("RM = del /q\n");
		mk.write("NOP = cd .\n");
	} else {
		mk.write("RM = rm -f\n");
		mk.write("NOP = :\n");
	}
	mk.write("\n");
	mk.write(".PHONY: all clean\n");

	if(output == "Makefile") {
		mk.write(".PHONY: " + targets.map(target_map).join(" ") + " distclean\n");
		mk.write("\n");

		mk.write("MAKEARGS$(.TARGET) = --no-print-directory");
		mk.write("\n");

		mk.write("all: " + pmake.projects.map(target_map).join(" ") + "\n");
		mk.write("	@$(NOP)\n");
		mk.write("\n");

		for(var i = 0; i < targets.length; i++) {
			mk.write(targets[i].target + ": " + pmake.resolveProjects(targets[i].libraries).map(target_map).join(" ") + "\n");
			mk.write("	@cd " + targets[i].base + " && $(MAKE) $(MAKEARGS) -f " + targets[i].target + ".make\n");
			mk.write("\n");
		}

		mk.write("clean:\n");
		for(var i = 0; i < targets.length; i++) {
			mk.write("	@cd " + targets[i].base + " && $(MAKE) $(MAKEARGS) -f " + targets[i].target + ".make clean\n");
		}
		mk.write("\n");

		mk.write("distclean: clean\n");
		mk.write("	$(SILENT)$(RM) Makefile\n");
		for(var i = 0; i < targets.length; i++) {
			mk.write("	$(SILENT)$(RM) " + makefile(targets[i]) + "\n");
		}
	} else {
		function target_filter(x) {
			const p = output.replace(/\.make$/, "").split("/");
			return x.target == p[p.length - 1];
		}

		const self = targets.filter(target_filter)[0];
		const objs = self.sources.map(pmake.compiler.output);

		mk.write("\n");

		mk.write("all: " + pmake.compiler.output(self) + "\n");
		mk.write("	@$(NOP)\n");
		mk.write("\n");

		mk.write(pmake.compiler.output(self) + ": " + objs.join(" ") + "\n");
		if(!(self instanceof pmake.InterfaceProject)) {
			var usage = "";
			if(self instanceof pmake.LibraryProject) {
				usage = "LIB";
			} else {
				usage = "LINK";
			}

			mk.write("	@echo " + usage + " " + pmake.compiler.output(self) + "\n");
			mk.write("	$(SILENT)" + pmake.compiler.link(self, objs) + "\n");
		}
		mk.write("\n");

		for(var i = 0; i < objs.length; i++) {
			var usage = "";
			if(pmake.isCxx(self.sources[i])) {
				usage = "CXX";
			} else {
				usage = "CC";
			}

			mk.write(objs[i] + ": " + self.sources[i] + "\n");
			mk.write("	@echo " + usage + " " + self.sources[i] + "\n");
			mk.write("	$(SILENT)" + pmake.compiler.compile(self, objs[i], self.sources[i]) + "\n");
			mk.write("\n");
		}

		mk.write("clean: \n");
		mk.write("	$(SILENT)$(RM) " + pmake.compiler.output(self) + " " + objs.join(" ") + "\n");
	}

	mk.close();
}

make("Makefile");
const targets = pmake.resolveProjects(pmake.projects);
for(var i = 0; i < targets.length; i++) {
	make(makefile(targets[i]));
}
})();