# Базовые действия с таблицами
import re

from dbconnection import *

class DbTable:
    dbconn = None

    def __init__(self):
        return

    def table_name(self):
        return self.dbconn.prefix + "table"

    def columns(self):
        return {"test": ["integer", "PRIMARY KEY"]}

    def column_names(self):
        return sorted(self.columns().keys(), key = lambda x: x)

    def primary_key(self):
        return ['id']

    def column_names_without_id(self):
        res = list(self.columns().keys())
        for key in self.primary_key():
            if key in res:
                res.remove(key)
        return res

    def table_constraints(self):
        return []

    def create(self):
        sql = "CREATE TABLE " + self.table_name() + "("
        arr = [k + " " + " ".join(v) for k, v in self.columns().items()]
        sql += ", ".join(arr + self.table_constraints())
        sql += ")"
        cur = self.dbconn.conn.cursor()
        cur.execute(sql)
        self.dbconn.conn.commit()
        return

    def drop(self):
        sql = "DROP TABLE IF EXISTS " + self.table_name()
        cur = self.dbconn.conn.cursor()
        cur.execute(sql)
        self.dbconn.conn.commit()
        return

    def delete_one(self, data):
        if type(data)==int:
            sql = f"DELETE FROM {self.table_name()} WHERE id = %(id)s"
            cur = self.dbconn.conn.cursor()
            cur.execute(sql, {'id': str(data)})
            self.dbconn.conn.commit()
        elif type(data)==str:
            sql = f"DELETE FROM {self.table_name()} WHERE name = %(name)s"
            cur = self.dbconn.conn.cursor()
            cur.execute(sql, {'name': str(data)})
            self.dbconn.conn.commit()
        return

    def insert_one(self, vals):
        for i in range(0, len(vals)):
            if type(vals[i]) == str:
                vals[i] = re.split(r"'|--|\(|\)", vals[i])[0]
                vals[i] = "'" + vals[i] + "'"
            else:
                vals[i] = str(vals[i])
        # sql = "INSERT INTO " + self.table_name() + "("
        # sql += ", ".join(self.column_names_without_id()) + ") VALUES("
        # sql += ", ".join(vals) + ")"
        sql = f"""INSERT INTO {self.table_name()} ({", ".join(self.column_names_without_id())}) VALUES ({", ".join(vals)});"""
        cur = self.dbconn.conn.cursor()
        cur.execute(sql)
        self.dbconn.conn.commit()
        return

    def first(self):
        sql = "SELECT * FROM " + self.table_name()
        sql += " ORDER BY "
        sql += ", ".join(self.primary_key())
        cur = self.dbconn.conn.cursor()
        cur.execute(sql)
        return cur.fetchone()        

    def last(self):
        sql = "SELECT * FROM " + self.table_name()
        sql += " ORDER BY "
        sql += ", ".join([x + " DESC" for x in self.primary_key()])
        cur = self.dbconn.conn.cursor()
        cur.execute(sql)
        return cur.fetchone()

    def all(self):
        sql = "SELECT * FROM " + self.table_name()
        sql += " ORDER BY "
        sql += ", ".join(self.primary_key())
        cur = self.dbconn.conn.cursor()
        cur.execute(sql)
        return cur.fetchall()