#include "../../include/database.h"
#include "../../include/package.h"
#include "../../include/error.h"
#include "../../include/util.h"

#include <stdio.h>
#include <errno.h>
#include <strings.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

bool lm_database_files_matches(lm_database_t *db, char *path, char *hash){
  char *hashdb = NULL;
  bool ret = false;

  if(NULL == db || NULL == path || NULL == hash){
    lm_error_set(LM_ERR_ArgNULL);
    goto end;
  }

  if(sqlite3_prepare(db->files_db, queries[QUERY_SELECT_FILE_SINGLE], strlen(queries[QUERY_SELECT_FILE_SINGLE]), &db->files_st, NULL) != SQLITE_OK){
    pdebug(__func__, "failed to prepare statement for selecting %s: %s", path, sqlite3_errmsg(db->files_db));
    lm_error_set(LM_ERR_DbSqlPrepareFail);
    goto end;
  }
  
  sqlite3_bind_text(db->files_st, 1, path, strlen(path), SQLITE_STATIC);

  if(sqlite3_step(db->files_st) != SQLITE_DONE){
    pdebug(__func__, "failed to execute select statement for selecting %s: %s", path, sqlite3_errmsg(db->files_db));
    lm_error_set(LM_ERR_DbSqlSelectFail);
    goto end;
  }

  hashdb = (char*)sqlite3_column_text(db->files_st, 1);
  ret = eq(hashdb, hash);

end:
  if(NULL != db->files_st){
    sqlite3_finalize(db->files_st);
    db->files_st = NULL;
  }
  return ret;
}

bool lm_database_files_iskeep(lm_database_t *db, char *path){
  bool ret = false;
  int iskeep = 0;

  if(NULL == db || NULL == path){
    lm_error_set(LM_ERR_ArgNULL);
    goto end;
  }

  if(sqlite3_prepare(db->files_db, queries[QUERY_SELECT_FILE_SINGLE], strlen(queries[QUERY_SELECT_FILE_SINGLE]), &db->files_st, NULL) != SQLITE_OK){
    pdebug(__func__, "failed to prepare statement for selecting %s: %s", path, sqlite3_errmsg(db->files_db));
    lm_error_set(LM_ERR_DbSqlPrepareFail);
    goto end;
  }
  
  sqlite3_bind_text(db->files_st, 1, path, strlen(path), SQLITE_STATIC);

  if(sqlite3_step(db->files_st) != SQLITE_DONE){
    pdebug(__func__, "failed to execute select statement for selecting %s: %s", path, sqlite3_errmsg(db->files_db));
    lm_error_set(LM_ERR_DbSqlSelectFail);
    goto end;
  }

  iskeep = sqlite3_column_int64(db->files_st, 2);
  ret = iskeep == 1;

end:
  if(NULL != db->files_st){
    sqlite3_finalize(db->files_st);
    db->files_st = NULL;
  }
  return ret;

}

bool lm_database_files_next(lm_database_t *db, lm_pkg_t *pkg, char **path, char **hash, bool *keep){
  if(NULL == db || NULL == pkg || NULL == path || NULL == hash || NULL == keep){
    lm_error_set(LM_ERR_ArgNULL);
    return false;
  }

  if(NULL == db->files_st &&
     sqlite3_prepare(db->files_db, queries[QUERY_SELECT_FILE_ALL], strlen(queries[QUERY_SELECT_FILE_ALL]), &db->files_st, NULL) != SQLITE_OK){
    pdebug(__func__, "failed to prepare statement for selecting all: %s", sqlite3_errmsg(db->files_db));
    lm_error_set(LM_ERR_DbSqlPrepareFail);
    return false;
  }

  else if(NULL != db->files_st){
    free(*path);
    free(*hash);
    *path = NULL;
    *hash = NULL;
  }

  if(sqlite3_step(db->files_st) != SQLITE_ROW){
    sqlite3_finalize(db->files_st);
    db->files_st = NULL;
    return false;
  }

  *path = strdup((char*)sqlite3_column_text(db->files_st, 0));
  *hash = strdup((char*)sqlite3_column_text(db->files_st, 1));
  *keep = sqlite3_column_int(db->files_st, 2) == 1;
  return true;
}

bool lm_database_files_add(lm_database_t *db, lm_pkg_t *pkg, char *path, char *hash){
  bool ret = false;

  if(NULL == db || NULL == pkg || NULL == path || NULL == hash){
    lm_error_set(LM_ERR_ArgNULL);
    goto end;
  }

  if(sqlite3_prepare(db->files_db, queries[QUERY_INSERT_FILE_SINGLE], strlen(queries[QUERY_INSERT_FILE_SINGLE]), &db->files_st, NULL) != SQLITE_OK){
    pdebug(__func__, "failed to prepare statement for inserting %s: %s", path, sqlite3_errmsg(db->files_db));
    lm_error_set(LM_ERR_DbSqlPrepareFail);
    goto end;
  }

  sqlite3_bind_text(db->files_st, 1, path, strlen(path), SQLITE_STATIC);
  sqlite3_bind_text(db->files_st, 2, hash, strlen(hash), SQLITE_STATIC);
  if(lm_package_keep_contains(pkg, path))
    sqlite3_bind_int(db->files_st, 3, 1);
  else
    sqlite3_bind_int(db->files_st, 3, 0);
  sqlite3_bind_text(db->files_st, 4, pkg->name, strlen(pkg->name), SQLITE_STATIC);

  if(sqlite3_step(db->files_st) != SQLITE_DONE){
    pdebug(__func__, "failed to execute insert statement for inserting %s: %s", pkg->name, sqlite3_errmsg(db->files_db));
    lm_error_set(LM_ERR_DbSqlInsertFail);
    goto end;
  }

  ret = true;
end:
  if(NULL != db->files_st){
    sqlite3_finalize(db->files_st);
    db->files_st = NULL;
  }
  return ret;
}

bool lm_database_files_del(lm_database_t *db, lm_pkg_t *pkg){
  if(NULL == db || NULL == pkg){
    lm_error_set(LM_ERR_ArgNULL);
    return false;
  }

  bool ret = false;

  if(sqlite3_prepare(db->files_db, queries[QUERY_DELETE_FILE_ALL], strlen(queries[QUERY_DELETE_FILE_ALL]), &db->files_st, NULL) != SQLITE_OK){
    pdebug(__func__, "failed to prepare statement for deleting %s: %s", pkg->name, sqlite3_errmsg(db->files_db));
    lm_error_set(LM_ERR_DbSqlPrepareFail);
    goto end;
  }

  sqlite3_bind_text(db->files_st, 1, pkg->name, strlen(pkg->name), SQLITE_STATIC);

  if(sqlite3_step(db->files_st) != SQLITE_DONE){
    pdebug(__func__, "failed to execute delete statement for deleting %s: %s", pkg->name, sqlite3_errmsg(db->files_db));
    lm_error_set(LM_ERR_DbSqlDeleteFail);
    goto end;
  }

  ret = true;
end:
  if(NULL != db->files_st){
    sqlite3_finalize(db->files_st);
    db->files_st = NULL;
  }
  return ret;
}