#!/usr/bin/env python

import json
import os
import subprocess
import requests
from bs4 import BeautifulSoup


class Instance(object):
    def __init__(self, instance):
        self.instance = instance

    def _get_td(self, td):
        return self.instance.find("td", attrs={"class": td})

    def _get_sort(self, td):
        return float(self.instance.find("td", attrs={"class": td}).find("span")["sort"])

    @property
    def name(self):
        return self._get_td("name").text.strip()

    @property
    def apiname(self):
        return self._get_td("apiname").text.strip()

    @property
    def memory(self):
        return self._get_sort("memory")

    @property
    def computeunits(self):
        return self._get_sort("computeunits")

    @property
    def vcpus(self):
        return self._get_sort("vcpus")

    @property
    def gpus(self):
        return int(self._get_td("gpus").text.strip())

    @property
    def fpga(self):
        return int(self._get_td("fpga").text.strip())

    @property
    def ecu_per_vcpu(self):
        return self._get_sort("ecu-per-vcpu")

    @property
    def physical_processor(self):
        return self._get_td("physical_processor").text.strip()

    @property
    def clock_speed_ghz(self):
        return self._get_td("clock_speed_ghz").text.strip()

    @property
    def intel_avx(self):
        return self._get_td("intel_avx").text.strip()

    @property
    def intel_avx2(self):
        return self._get_td("intel_avx2").text.strip()

    @property
    def intel_turbo(self):
        return self._get_td("intel_turbo").text.strip()

    @property
    def storage(self):
        return self._get_sort("storage")

    @property
    def architecture(self):
        return self._get_td("architecture").text.strip()

    @property
    def network_perf(self):  # 2 == low
        return self._get_sort("networkperf")

    @property
    def ebs_max_bandwidth(self):
        return self._get_sort("ebs-max-bandwidth")

    @property
    def ebs_throughput(self):
        return self._get_sort("ebs-throughput")

    @property
    def ebs_iops(self):
        return self._get_sort("ebs-iops")

    @property
    def max_ips(self):
        return int(self._get_td("maxips").text.strip())

    @property
    def enhanced_networking(self):
        return self._get_td("enhanced-networking").text.strip() != "No"

    @property
    def vpc_only(self):
        return self._get_td("vpc-only").text.strip() != "No"

    @property
    def ipv6_support(self):
        return self._get_td("ipv6-support").text.strip() != "No"

    @property
    def placement_group_support(self):
        return self._get_td("placement-group-support").text.strip() != "No"

    @property
    def linux_virtualization(self):
        return self._get_td("linux-virtualization").text.strip()

    def to_dict(self):
        result = {}

        for attr in [
            x
            for x in self.__class__.__dict__.keys()
            if not x.startswith("_") and x != "to_dict"
        ]:
            try:
                result[attr] = getattr(self, attr)
            except ValueError as ex:
                if "'N/A'" in str(ex):
                    print(
                        "Skipping attribute '{0}' for instance type '{1}' (not found)".format(
                            attr, self.name
                        )
                    )
                else:
                    raise

        return self.apiname, result


def main():
    print("Getting HTML from http://www.ec2instances.info")
    page_request = requests.get("http://www.ec2instances.info")
    soup = BeautifulSoup(page_request.text, "html.parser")
    data_table = soup.find(id="data")

    print("Finding data in table")
    instances = data_table.find("tbody").find_all("tr")

    print("Parsing data")
    result = {}
    for instance in instances:
        instance_id, instance_data = Instance(instance).to_dict()
        result[instance_id] = instance_data

    root_dir = (
        subprocess.check_output(["git", "rev-parse", "--show-toplevel"])
        .decode()
        .strip()
    )
    dest = os.path.join(root_dir, "moto/ec2/resources/instance_types.json")
    print("Writing data to {0}".format(dest))
    with open(dest, "w") as open_file:
        json.dump(result, open_file, sort_keys=True)


if __name__ == "__main__":
    main()