#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <linux/uinput.h>
#include <sys/stat.h>

int read_file(char* filename);

void emit(int fd, int type, int code, int val) {
	struct input_event ie;
	ie.type = type;
	ie.code = code;
	ie.value = val;
	ie.time.tv_sec = 0;
	ie.time.tv_usec = 0;

	write(fd, &ie, sizeof(ie));
}


int main(int argc, char* argv[]) {
	if(argc < 2) {
		printf("Please provide a capture file.");
		exit(EXIT_FAILURE);
	}

	if(read_file(argv[1])) {
		exit(EXIT_FAILURE);
	}
	return 0;
}

int read_file(char* filename) {
	FILE* fp;
	char* line = NULL;
	size_t len = 0;
	ssize_t read;

	fp = fopen(filename, "r");
	if (fp == NULL) {
		printf("Failed to open file %s: %d\n", filename, errno);
		return 1;
	}

	while((read = getline(&line, &len, fp)) != -1) {
		printf("%s", line);
	}
}
	
int setup_mouse() {
	struct uinput_setup usetup;
	// int i = 50;
	int i = 0;
	int fd = open("/dev/uinput", O_WRONLY | O_NONBLOCK);

/* enable mouse button left and relative events */
   printf("EV_KEY 0x%08x\n", EV_KEY);
   printf("UI_SET_EVBIT 0x%08lx\n", UI_SET_EVBIT);
   printf("UI_SET_KEYBIT 0x%08lx\n", UI_SET_KEYBIT);
   printf("BTN_LEFT 0x%08x\n", BTN_LEFT);
   printf("EV_REL 0x%08x\n", EV_REL);

   ioctl(fd, UI_SET_EVBIT, EV_KEY);

   ioctl(fd, UI_SET_KEYBIT, BTN_LEFT);

   ioctl(fd, UI_SET_EVBIT, EV_REL);
   ioctl(fd, UI_SET_RELBIT, REL_X);
   ioctl(fd, UI_SET_RELBIT, REL_Y);

   memset(&usetup, 0, sizeof(usetup));
   usetup.id.bustype = BUS_USB;
   usetup.id.vendor = 0x1234; /* sample vendor */
   usetup.id.product = 0x5678; /* sample product */
   strcpy(usetup.name, "Example device");

   ioctl(fd, UI_DEV_SETUP, &usetup);
   ioctl(fd, UI_DEV_CREATE);

   /*
    * On UI_DEV_CREATE the kernel will create the device node for this
    * device. We are inserting a pause here so that userspace has time
    * to detect, initialize the new device, and can start listening to
    * the event, otherwise it will not notice the event we are about
    * to send. This pause is only needed in our example code!
    */
   sleep(1);

   /* Move the mouse diagonally, 5 units per axis */
   while (i--) {
      emit(fd, EV_REL, REL_X, 5);
      emit(fd, EV_REL, REL_Y, 5);
      emit(fd, EV_SYN, SYN_REPORT, 0);
      usleep(15000);
   }

   // Click left mouse button.

   emit(fd, EV_KEY, BTN_MOUSE, 1);
   emit(fd, EV_SYN, SYN_REPORT, 0);
   emit(fd, EV_KEY, BTN_MOUSE, 0);
   emit(fd, EV_SYN, SYN_REPORT, 0);
   /*
    * Give userspace some time to read the events before we destroy the
    * device with UI_DEV_DESTOY.
    */
   sleep(1);

   ioctl(fd, UI_DEV_DESTROY);
   close(fd);

   return 0;
}