import random
from ipaddress import IPv6Network


def parse_rule(rule):
    parts = rule.split()
    prefix, next_hop = parts
    return IPv6Network(prefix), int(next_hop)


def generate_random_test_cases(rules, n):
    with open('../data/test-data', 'w') as f:
        for rule in rules:
            rule_network = rule[0]
            rule_next_hop = rule[1]

            network = rule_network
            for _ in range(n):
                next_hop = rule_next_hop
                address = rule_network.network_address + random.randint(0, rule_network.num_addresses - 1)

                for oth_rule in rules:
                    if oth_rule == rule:
                        continue
                    oth_network = oth_rule[0]
                    oth_next_hop = oth_rule[1]
                    if address in oth_network and oth_network.subnet_of( network ):
                        print(f"address {address} is closer to {oth_network} {rule_next_hop} than {rule_network} {oth_next_hop}")
                        next_hop = oth_next_hop
                        network = oth_network
                f.write(f"{address} {next_hop}\n")
                print(f"Generated test case: {address} {next_hop}")
            print("tests for rule ", rule_network, " with next hop ", rule_next_hop, " generated")

def main():
    rules = []
    
    with open('../data/routing-data', 'r') as f:
        for line in f:
            rules.append(line.strip())

    parsed_rules = [parse_rule(rule) for rule in rules]

    num_tests = 10
    generate_random_test_cases(parsed_rules, num_tests)

           

if __name__ == "__main__":
    main()