import datetime
import random
import time

from sqlgenerator.ColumnValue import ValueType, ColumnValue
from sqlparse.SQLColumn import SQLColumn, SQLColumnType
from sqlparse.SQLTable import SQLTable
from lorem_text import lorem

min_bigint = 0
max_bigint = 9223372036854775807

min_int = -2147483648
max_int = 2147483647

min_date = datetime.date(2023, 1, 1)
max_date = datetime.date(2024, 12, 31)


def generate_random_insert(sql_table: SQLTable):
    columnValues = []
    for column in sql_table.columns:
        columnValues.append(generate_random_column(column))

    sql_insert_command = "INSERT INTO " + sql_table.table_name + " VALUES (${i});"
    for columnValue in columnValues:
        if columnValue.valueType == ValueType.INT:
            sql_insert_command = sql_insert_command.replace("${i}", str(columnValue.value) + ", ${i}")
        else:
            sql_insert_command = sql_insert_command.replace("${i}", "'" + columnValue.value + "', ${i}")

    sql_insert_command = sql_insert_command.replace(", ${i}", "")
    return sql_insert_command


def generate_random_column(sql_column: SQLColumn):
    if sql_column.columnType == SQLColumnType.BIGINT:
        return ColumnValue(random.randint(min_bigint, max_bigint), ValueType.INT)
    elif sql_column.columnType == SQLColumnType.INT:
        return ColumnValue(random.randint(min_int, max_int), ValueType.INT)
    elif sql_column.columnType == SQLColumnType.VARCHAR:
        text_legnth = random.randint(1, 255)
        lorem_text = lorem.sentence()
        return ColumnValue(lorem_text[:text_legnth], ValueType.STRING)
    elif sql_column.columnType == SQLColumnType.DATE:
        delta = max_date - min_date
        random_days = random.randrange(delta.days + 1)
        random_date = min_date + datetime.timedelta(days=random_days)
        return ColumnValue(str(random_date), ValueType.STRING)