Short answers, pulled from the story.
The People's Socialist Republic of Albania existed from the 10th of January 1946 to the 29th of April 1991. It was originally founded as the People's Republic of Albania from 1946 to 1976, before adopting the "Socialist" designation in the 1976 constitution.
Enver Hoxha led Albania from 1946 until his death on the 11th of April 1985, after which Ramiz Alia governed until 1991. Hoxha simultaneously held the roles of prime minister, foreign minister, defense minister, and army commander in chief in the early years of the state.
Albania declared itself the world's first atheist state following a violent campaign launched after Hoxha's speech on the 6th of February 1967. The regime claimed religion had divided the Albanian nation and kept it in backwardness. By year's end, all churches, mosques, and monasteries had been closed or converted into warehouses and gymnasiums, and the 1976 constitution explicitly forbade religious activity.
Albania formally withdrew from the Warsaw Pact in September 1968, within one month of the Warsaw Pact invasion of Czechoslovakia in August 1968. The invasion served as the tipping point in a long deterioration of Soviet-Albanian relations that had begun after Khrushchev's de-Stalinization campaign. Leonid Brezhnev made no attempt to force Albania to remain, making it the only member to leave the alliance before 1990.
China replaced Soviet aid after the 1961 diplomatic break, supplying about 90% of the parts, foodstuffs, and other goods the Soviet Union had promised. China lent Albania money on more favorable terms than Moscow and provided a powerful radio transmitter. However, Chinese equipment and technicians were less sophisticated than the Soviet resources they replaced, and Albania's economy suffered a near collapse in foreign trade as China proved unable to deliver promised machinery on time.
After the republic was proclaimed on the 29th of April 1991, the Democratic Party defeated the Communists in elections on the 22nd of March 1992. The transition brought severe challenges, including unfulfilled promises of fast prosperity. In June 1996, the Democratic Party manipulated election results to win an absolute majority, and the government collapsed in 1997 following the implosion of pyramid schemes and widespread corruption, which sparked chaos and rebellion requiring foreign intervention.