import smartpy as sp

class Memoir(sp.Contract):
    def __init__(self):
        self.init(
            records = sp.big_map(
                tkey = sp.TInt,
                tvalue = sp.TString
            ),
        )

    @sp.entry_point
    def add_record(self, params):
        self.data.records[params.id] = params.record

    @sp.entry_point
    def update_record(self, params):
        self.data.records = sp.update_map(self.data.records, params.id, sp.some(params.record))

    @sp.entry_point
    def delete_record(self, params):
        del self.data.records[params.id]

@sp.add_test(name="MyMedMemoir")
def test():
    scenario = sp.test_scenario()
    scenario.h1("MyMedMemoir")

    c1 = Memoir()
    scenario += c1
    scenario += c1.add_record(id = 0, record = '{record #0}')
    scenario += c1.add_record(id = 1, record = '{record #1}')
    scenario += c1.add_record(id = 2, record = '{record #2}')
    scenario += c1.update_record(id = 1, record = '{record #1 - updated}')
    scenario += c1.delete_record(id = 2)