#include "pipe.h"
#include "command.h"
#include "queue.h"
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>

#define FIFO_PATH "/tmp/looper_cmd"
#define LINE_MAX 256

/* forward‑declare the global queues (defined in looper.c) */
extern spsc_queue_t cmd_queue;
extern spsc_queue_t cmd_queue_main_fifo;

static void *pipe_thread_func(void *arg) {
  (void)arg;
  char line[LINE_MAX];

  while (1) {
    FILE *fifo = fopen(FIFO_PATH, "r");
    if (!fifo) {
      perror("fopen fifo");
      return NULL;
    }

    while (fgets(line, sizeof(line), fifo)) {
      /* strip newline */
      size_t len = strlen(line);
      if (len > 0 && line[len - 1] == '\n')
        line[len - 1] = '\0';

      if (strcmp(line, "add") == 0) {
        command_t cmd = {.type = CMD_ADD_CHANNEL, .channel = -1, .data = 0};
        queue_push(&cmd_queue, cmd);
      } else if (strcmp(line, "add_midi") == 0) {
<<<<<<< HEAD
        command_t cmd = {.type = CMD_ADD_MIDI_CHANNEL, .channel = -1, .data = 0};
        queue_push(&cmd_queue, cmd);
=======
        command_t cmd = {
            .type = CMD_ADD_MIDI_CHANNEL, .channel = -1, .data = 0};
        queue_push(&cmd_queue_main_fifo, cmd);
>>>>>>> 3-integrate-carla
      } else if (strcmp(line, "remove") == 0) {
        command_t cmd = {.type = CMD_REMOVE_CHANNEL, .channel = -1, .data = 0};
        queue_push(&cmd_queue, cmd);
      } else if (strncmp(line, "record ", 7) == 0) {
        int ch = atoi(line + 7);
        command_t cmd = {.type = CMD_CYCLE, .channel = ch, .data = 0};
        queue_push(&cmd_queue, cmd);
      } else if (strcmp(line, "stop") == 0) {
        command_t cmd = {.type = CMD_STOP, .channel = -1, .data = 0};
        queue_push(&cmd_queue, cmd);
      } else if (strncmp(line, "bind ", 5) == 0) {
        int ch = atoi(line + 5);
        command_t cmd = {.type = CMD_BIND_CHANNEL, .channel = -1, .data = ch};
        queue_push(&cmd_queue, cmd);
      } else if (strcmp(line, "unbind") == 0) {
        command_t cmd = {.type = CMD_UNBIND, .channel = -1, .data = 0};
        queue_push(&cmd_queue, cmd);
      } else if (strcmp(line, "scene_add") == 0) {
        command_t cmd = {.type = CMD_ADD_SCENE, .channel = -1, .data = 0};
        queue_push(&cmd_queue, cmd);
      } else if (strcmp(line, "scene_remove") == 0) {
        command_t cmd = {.type = CMD_REMOVE_SCENE, .channel = -1, .data = 0};
        queue_push(&cmd_queue, cmd);
      } else if (strcmp(line, "scene_next") == 0) {
        command_t cmd = {.type = CMD_NEXT_SCENE, .channel = -1, .data = 0};
        queue_push(&cmd_queue, cmd);
      } else if (strcmp(line, "scene_prev") == 0) {
        command_t cmd = {.type = CMD_PREV_SCENE, .channel = -1, .data = 0};
        queue_push(&cmd_queue, cmd);
      } else if (strcmp(line, "load") == 0) {
        command_t cmd = {.type = CMD_LOAD, .channel = -1, .data = 0};
        queue_push(&cmd_queue, cmd);
      } else if (strcmp(line, "save") == 0) {
        command_t cmd = {.type = CMD_SAVE, .channel = -1, .data = 0};
        queue_push(&cmd_queue, cmd);
      }
      /* ignore unknown lines */
    }
    /* EOF – all writers closed, reopen for next connection */
    fclose(fifo);
    {
      struct timespec ts = {.tv_sec = 0, .tv_nsec = 50000000};
      nanosleep(&ts, NULL);
    } /* small pause before retrying */
  }
  return NULL; /* unreachable */
}

int pipe_start_reader(void) {
  /* create FIFO if it doesn't exist */
  if (mkfifo(FIFO_PATH, 0666) != 0 && errno != EEXIST) {
    perror("mkfifo");
    return -1;
  }
  pthread_t tid;
  if (pthread_create(&tid, NULL, pipe_thread_func, NULL) != 0) {
    perror("pthread_create");
    return -1;
  }
  pthread_detach(tid); /* we don't need to join */
  return 0;
}