import sqlite3
import sys

from debug import debug_print
from draw_db import draw, draw_two, draw_three
from date_util import format_date


def read_db(db_name, tb_name='', section_id=''):
    debug_print('read_db, db_name = ', db_name, ', tb_name = ', tb_name, ', section_id = ', section_id)
    conn = sqlite3.connect(db_name)

    if not tb_name:
        table_cursor = conn.cursor()
        table_cursor.execute(' SELECT name FROM sqlite_master WHERE type=\'table\'; ')
        table_names = table_cursor.fetchall()
        print('table_names = ', str(table_names))
        return

    if not section_id:
        section_cursor = conn.execute(' SELECT section_id, section_date, section_end_date FROM ' + tb_name)
        for section_row in section_cursor:
            section_id = section_row[0]
            section_date = section_row[1]
            section_end_date = section_row[2]
            print('section_id = ', section_id, ', section_date = ', format_date(section_date), ', section_end_date = ',
                  format_date(section_end_date))
        return

    sql_str = ' SELECT * FROM ' + tb_name + ' WHERE section_id == ' + section_id
    section_cursor = conn.execute(sql_str)
    for section_row in section_cursor:
        section_id = section_row[0]
        _sample_id = section_row[3]
        _sample_end_id = section_row[6]
        debug_print('section_id = ', section_id, ', _sample_id = ', _sample_id, ', _sample_end_id = ',
                    _sample_end_id)

        max_list = []
        min_list = []
        delta_list = []
        sample_sql = "SELECT max, min FROM sample_table WHERE _id >= " + str(_sample_id) + ' AND ' + ' _id <= ' + str(_sample_end_id)
        sample_cursor = conn.execute(sample_sql)
        for sample_row in sample_cursor:
            max = sample_row[0]
            min = sample_row[1]
            delta = max - min
            max_list.append(max)
            min_list.append(min)
            delta_list.append(delta)

        # debug_print('max_list = ', str(max_list))
        # debug_print('min_list = ', str(min_list))
        # debug_print('delta_list = ', str(delta_list))
        # draw(max_list)
        draw_two(max_list, min_list)
        # draw_three(max_list, min_list, delta_list)

    conn.close()


if __name__ == '__main__':
    argv = sys.argv[1:]
    argc = len(sys.argv[1:])
    # print('sys.argv[1:] = ', argv, ', ', str(len(argv)))

    if argc < 1:
        print('USAGE: python analysis_db.py xxx.db')
        exit(1)

    db_uri = argv[0] if argc >= 1 else ''
    tb_name = argv[1] if argc >= 2 else ''
    section_id = argv[2] if argc >= 3 else ''
    read_db(db_uri, tb_name, section_id)