import random, time
print('Loading')

# Constants
METABOLISM, REPRO_RATE, TEMPERATURE_LIMIT, INFANT_DEATH_CHANCE, AGE_LIMIT, GENETIC_STABILITY, BREEDING_AGE, AGE = 1, 2, 10, 1, 3, 1, 1, 0
population = [[METABOLISM, REPRO_RATE, TEMPERATURE_LIMIT, INFANT_DEATH_CHANCE, AGE_LIMIT, GENETIC_STABILITY, BREEDING_AGE, AGE]] * 10
offspring = shuffled_breed = breedable = []
number_of_genarations = 0
deaths = births = total_deaths = total_births = 0
start = time.time()

for _ in range(100):
    gen_start = time.time()
    before = len(population)
    # Age Limit Culling
    population = list(filter(lambda item : item[7] != item[4], population))
    after = len(population)
    deaths += before - after
    # If breeding age allows breeding
    breedable.extend(list(filter(lambda item : item[7] >= item[6], population)))
    # Shuffle breeding list
    random.shuffle(breedable)

    if len(breedable) % 2 == 1:
        del breedable[0]

    # loop over the entire breeding catalog
    while len(breedable) != 0:
        # The the first creature's repro rate is higher than the second's
        if breedable[1][1] > breedable[0][1]:
            litter_cap = random.randint(breedable[0][1], breedable[1][1])
        # Second creature's repro rate is higher
        elif breedable[0][1] > breedable[1][1]:
            litter_cap = random.randint(breedable[1][1], breedable[0][1])
        # Repro rate is equal between creatures
        elif breedable[0][1] == breedable[1][1]:
            litter_cap = random.randint(breedable[0][1], breedable[1][1]+1)

        # With a litter_cap set, generate a litter
        for litter in range(litter_cap):
            # Copy either of the parent's attributes, minus age.
            baby = [breedable[random.randint(0, 1)][i] for i in range(7)] + [0]
            # GENETIC STABILITY
            if random.randint(1, 1000) <= baby[5]:
                baby[random.randint(0, 6)] += random.choice([-1, 1])
                baby[4] = baby[4] or 1
            offspring.append(baby)
            births += 1
        del breedable[0:2]

    #aging of population
    age_check = 0
    while len(population) != age_check:
        population[age_check][7] += 1
        age_check += 1

    #offspring added to population
    population.extend(offspring)

    gen_end = time.time()

    #resets
    offspring, breedable, shuffled_breed = [], [], []
    number_of_genarations += 1
    print('-'*45)
    print('[{}s] Generation {} finished in {} seconds.'.format(round(gen_end - start, 2), number_of_genarations, round(gen_end - gen_start, 2)))
    print(f"Number of people: {len(population)}\nDeaths: {deaths}\nBirths: {births}")
    total_deaths += deaths
    total_births += births
    births = deaths = 0

print(f"Population: {len(population)}")
print(f"Deaths: {total_deaths}")
print(f"Births: {total_births}")
print(f"Creatures: {population}")