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#include "core.h"
#include "database.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>

void printError(const char *s) {
  printf("ERROR: %s\n", s);
}


void printInfo(const char *s) {
  printf("INFO: %s\n", s);
}

char* replaceChar(char* str, char find, char replace) {
  char *currentPos = strchr(str,find);
  while(currentPos) {
    *currentPos = replace;
    currentPos = strchr(currentPos, find);
  }
  return str;
}

void gitrolex_parseArgs(struct State_t *s, int argc, const char *argv[]) {
  const char *task;
  if(argc < 3) {
    s->task = ERROR;
    return;
  }
  task = argv[1];
  if(!strcmp(task, "status")) {
    s->task = STATUS;
  }
  else if(!strcmp(task, "export")) {
    s->task = EXPORT;
  }
  else if(!strcmp(task, "pause")) {
    s->task = PAUSE;
  }
  else if(!strcmp(task, "play")) {
    s->task = PLAY;
  }
  else if(!strcmp(task, "track")) {
    s->task = TRACK;
  }
  strcpy(s->taskArgs, argv[2]);
  // lame attempt at path sanitization
  replaceChar(s->taskArgs, '/', '-');
  replaceChar(s->taskArgs, '$', '-');
}

enum Error_t gitrolex_status(struct State_t *s) {
  enum DatabaseError_t r;
  char msg[512];
  int size = 2048;
  struct TimeEnty_t entries[2048];
  r = database_getEntries(s->taskArgs, entries, &size);
  if(r != OK) {
    printError("Ya blew it");
  }
  struct TimeEnty_t *start = entries;
  struct TimeEnty_t *end = &entries[size - 1];
  long diff = end->datetime - start->datetime;
  sprintf(msg, "You've been working on %s for %ld seconds", s->taskArgs, diff);
  printInfo(msg);
  return OK;
}

enum Error_t pushNow(struct State_t *s, bool direction) {
  enum DatabaseError_t r;
  struct TimeEnty_t entry = {
    .direction = direction,
    .datetime = time(NULL)
  };
  r = database_pushEntry(s->taskArgs, &entry);
  gitrolex_status(s);
  return r == DB_OK ? OK : DB_ERROR;
}

enum Error_t gitrolex_checkout(struct State_t *s){
  return pushNow(s, OUT);
}

enum Error_t gitrolex_checkin(struct State_t *s){
  return pushNow(s, IN);
}

enum Error_t gitrolex_export(struct State_t *s) {
  return -1;
}


void gitrolex_mapStateToTask(struct State_t *s) {
  enum Error_t r;
  switch(s->task) {
    case STATUS:
      gitrolex_status(s);
      break;
    case EXPORT:
      r = gitrolex_export(s);
      break;
    case TRACK:
      r = gitrolex_checkout(s);
      break;
    case PAUSE:
      r = gitrolex_checkin(s);
      break;
    case PLAY:
      r = gitrolex_checkout(s);
      break;
    case ERROR:
    default:
      printError("Usage ./gitrolex status | export | pause | play | track <branch-name>");
      break;
  }
}

int gitrolex_core(int argc, const char* argv[]) {
  struct State_t state;
  gitrolex_parseArgs(&state, argc, argv);
  gitrolex_mapStateToTask(&state);
}