# ------------------------------------
# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
# ------------------------------------
import datetime
import os
from azure.keyvault.certificates import CertificateClient, CertificatePolicy
from azure.identity import DefaultAzureCredential
from azure.core.exceptions import HttpResponseError

# ----------------------------------------------------------------------------------------------------------
# Prerequisites:
# 1. An Azure Key Vault (https://docs.microsoft.com/en-us/azure/key-vault/quick-create-cli)
#
# 2. azure-keyvault-certificates and azure-identity packages (pip install these)
#
# 3. Set Environment variables AZURE_CLIENT_ID, AZURE_TENANT_ID, AZURE_CLIENT_SECRET, VAULT_URL
#    (See https://github.com/Azure/azure-sdk-for-python/tree/master/sdk/keyvault/azure-keyvault-keys#authenticate-the-client)
#
# ----------------------------------------------------------------------------------------------------------
# Sample - demonstrates the basic list operations on a vault(certificate) resource for Azure Key Vault.
# The vault has to be soft-delete enabled to perform one of the following operations: https://docs.microsoft.com/en-us/azure/key-vault/key-vault-ovw-soft-delete
#
# 1. Create certificate (begin_create_certificate)
#
# 2. List certificates from the Key Vault (list_properties_of_certificates)
#
# 3. List certificate versions from the Key Vault (list_properties_of_certificate_versions)
#
# 4. List deleted certificates from the Key Vault (list_deleted_certificates). The vault has to be soft-delete enabled
# to perform this operation.
#
# ----------------------------------------------------------------------------------------------------------

# Instantiate a certificate client that will be used to call the service. Notice that the client is using default
# Azure credentials. To make default credentials work, ensure that environment variables 'AZURE_CLIENT_ID',
# 'AZURE_CLIENT_SECRET' and 'AZURE_TENANT_ID' are set with the service principal credentials.
VAULT_URL = os.environ["VAULT_URL"]
credential = DefaultAzureCredential()
client = CertificateClient(vault_url=VAULT_URL, credential=credential)
try:
    # Let's create a certificate for holding storage and bank accounts credentials. If the certificate
    # already exists in the Key Vault, then a new version of the certificate is created.
    print("\n.. Create Certificate")
    bank_cert_name = "BankListCertificate"
    storage_cert_name = "StorageListCertificate"

    bank_certificate_poller = client.begin_create_certificate(
        certificate_name=bank_cert_name, policy=CertificatePolicy.get_default()
    )
    storage_certificate_poller = client.begin_create_certificate(
        certificate_name=storage_cert_name, policy=CertificatePolicy.get_default()
    )

    # await the creation of the bank and storage certificate
    bank_certificate = bank_certificate_poller.result()
    storage_certificate = storage_certificate_poller.result()

    print("Certificate with name '{0}' was created.".format(bank_certificate.name))
    print("Certificate with name '{0}' was created.".format(storage_certificate.name))

    # Let's list the certificates.
    print("\n.. List certificates from the Key Vault")
    certificates = client.list_properties_of_certificates()
    for certificate in certificates:
        print("Certificate with name '{0}' was found.".format(certificate.name))

    # You've decided to add tags to the certificate you created. Calling begin_create_certificate on an existing
    # certificate creates a new version of the certificate in the Key Vault with the new value.

    tags = {"a": "b"}
    bank_certificate_poller = client.begin_create_certificate(
        certificate_name=bank_cert_name, policy=CertificatePolicy.get_default(), tags=tags
    )
    bank_certificate = bank_certificate_poller.result()
    print(
        "Certificate with name '{0}' was created again with tags '{1}'".format(
            bank_certificate.name, bank_certificate.properties.tags
        )
    )

    # You need to check all the different tags your bank account certificate had previously. Let's print
    # all the versions of this certificate.
    print("\n.. List versions of the certificate using its name")
    certificate_versions = client.list_properties_of_certificate_versions(bank_cert_name)
    for certificate_version in certificate_versions:
        print(
            "Bank Certificate with name '{0}' with version '{1}' has tags: '{2}'.".format(
                certificate_version.name, certificate_version.version, certificate_version.tags
            )
        )

    # The bank account and storage accounts got closed. Let's delete bank and storage accounts certificates.
    # We call wait() to ensure the certificate is deleted server side because the following method requires
    # server-side deletion to run properly. In most situations you will not have to call wait().
    client.begin_delete_certificate(bank_cert_name).wait()
    client.begin_delete_certificate(storage_cert_name).wait()

    # You can list all the deleted and non-purged certificates, assuming Key Vault is soft-delete enabled.
    print("\n.. List deleted certificates from the Key Vault")
    deleted_certificates = client.list_deleted_certificates()
    for deleted_certificate in deleted_certificates:
        print(
            "Certificate with name '{0}' has recovery id '{1}'".format(
                deleted_certificate.name, deleted_certificate.recovery_id
            )
        )

except HttpResponseError as e:
    if "(NotSupported)" in e.message:
        print("\n{0} Please enable soft delete on Key Vault to perform this operation.".format(e.message))
    else:
        print("\nrun_sample has caught an error. {0}".format(e.message))

finally:
    print("\nrun_sample done")