from .operation import *

TIME_STATISTIC_NONE = 'NONE'
TIME_STATISTIC_AVERAGED = 'AVERAGED'
TIME_STATISTIC_MINIMUM = 'MINIMUM'
TIME_STATISTIC_MAXIMUM = 'MAXIMUM'
TIME_STATISTIC_RANGE = 'RANGE'

element_schema = {'type': 'str' , 'optional': True , 'readonly': False}

def get_time_schema(name: str) -> dict[str, dict[str, Any]]:
    return { 'DURATION'           : element_schema,
             'HYDRAULIC TIMESTEP' : element_schema,
             'QUALITY TIMESTEP'   : element_schema,
             'RULE TIMESTEP'      : element_schema,
             'PATTERN TIMESTEP'   : element_schema,
             'PATTERN START'      : element_schema,
             'REPORT TIMESTEP'    : element_schema,
             'REPORT START'       : element_schema,
             'START CLOCKTIME'    : element_schema,
             'STATISTIC'          : element_schema}


def get_time(name: str) -> dict[str, Any]:
    ts = read_all(name, f"select * from times")
    d = {}
    for e in ts:
        d[e['key']] = str(e['value'])
    return d


def set_time(name: str, cs: ChangeSet) -> ChangeSet:
    raw_old = get_time(name)

    old = {}
    new = {}

    new_dict = cs.operations[0]
    schema = get_time_schema(name)
    for key in schema.keys():
        if key in new_dict:
            old[key] = str(raw_old[key])
            new[key] = str(new_dict[key])

    redo_cs = g_update_prefix | { 'type' : 'time' }

    redo_sql = ''
    for key, value in new.items():
        if redo_sql != '':
            redo_sql += '\n'
        redo_sql += f"update times set value = '{value}' where key = '{key}';"
        redo_cs |= { key: value }

    undo_cs = g_update_prefix | { 'type' : 'time' }

    undo_sql = ''
    for key, value in old.items():
        if undo_sql != '':
            undo_sql += '\n'
        undo_sql += f"update times set value = '{value}' where key = '{key}';"
        undo_cs |= { key: value }

    return execute_command(name, redo_sql, undo_sql, redo_cs, undo_cs)