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

#include <sqlite3.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>

char *queries[] = {
  "CREATE TABLE IF NOT EXISTS packages (" \
  "       name TEXT PRIMARY KEY NOT NULL," \
  "       desc TEXT NOT NULL," \
  "       version TEXT NOT NULL," \
  "       size INT NOT NULL," \
  "       depends TEXT NOT NULL);",
  "INSERT INTO packages VALUES (?, ?, ?, ?, ?)",
  "SELECT * FROM packages WHERE name = '?'",
  "DELETE from packages WHERE name = '?'",
};

lm_database_t *lm_database_new(char *path){
  lm_database_t *db = malloc(sizeof(lm_database_t));
  char *err = NULL;
  bzero(db, sizeof(lm_database_t));

  if(exists(path) && (is_file(path) || !can_read(path) || !can_write(path))){
    lm_error_set(LM_ERR_DbCantAccess);
    return NULL;
  }

  char dbfile[strlen(path)+20];
  join(dbfile, path, "packages.db");
  
  if(sqlite3_open(dbfile, &db->sql)){
    pdebug(__func__, "(%s) failed to open databse: %s", path, sqlite3_errmsg(db->sql));
    lm_error_set(LM_ERR_DbSqlOpenFail);
    return NULL;
  }
  
  if(sqlite3_exec(db->sql, queries[QUERY_CREATE_TABLE], NULL, 0, &err) != SQLITE_OK){
    pdebug(__func__, "(%s) failed to create packages table: %s", path, err);
    lm_error_set(LM_ERR_DbSqlCreateFail);
    sqlite3_free(err);
  }

  db->dir = strdup(path);
  return db;
}

void lm_database_free(lm_database_t *db){
  sqlite3_close(db->sql);
  free(db->dir);

  lm_pkg_t *cur = db->pkg, *prev = NULL;
  while(NULL != cur){
    prev = cur;
    cur = cur->next;
    lm_package_free(prev);
  }

  free(db);
}