# ------------------------------------
# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
# ------------------------------------
import asyncio
import os

from azure.identity.aio import DefaultAzureCredential
from azure.keyvault.certificates.aio import CertificateClient
from azure.keyvault.certificates import CertificatePolicy, CertificateContentType, WellKnownIssuerNames

# ----------------------------------------------------------------------------------------------------------
# Prerequisites:
# 1. An Azure Key Vault (https://learn.microsoft.com/azure/key-vault/quick-create-cli)
#
# 2. azure-keyvault-certificates and azure-identity packages (pip install these)
#
# 3. Set up your environment to use azure-identity's DefaultAzureCredential. For more information about how to configure
#    the DefaultAzureCredential, refer to https://aka.ms/azsdk/python/identity/docs#azure.identity.DefaultAzureCredential
#
# ----------------------------------------------------------------------------------------------------------
# Sample - demonstrates the basic CRUD operations on a vault(certificate) resource for Azure Key Vault
#
# 1. Create a new certificate (create_certificate)
#
# 2. Get an existing certificate (get_certificate)
#
# 3. Update an existing certificate (update_certificate)
#
# 4. Delete a certificate (delete_certificate)
#
# ----------------------------------------------------------------------------------------------------------


async def run_sample():
    # Instantiate a certificate client that will be used to call the service.
    # Here we use the DefaultAzureCredential, but any azure-identity credential can be used.
    VAULT_URL = os.environ["VAULT_URL"]
    credential = DefaultAzureCredential()
    client = CertificateClient(vault_url=VAULT_URL, credential=credential)

    # Let's create a certificate for holding bank account credentials valid for 1 year.
    # if the certificate already exists in the Key Vault, then a new version of the certificate is created.
    print("\n.. Create certificate")

    # Before creating your certificate, let's create the management policy for your certificate.
    # Here you specify the properties of the key, secret, and issuer backing your certificate,
    # the X509 component of your certificate, and any lifetime actions you would like to be taken
    # on your certificate

    # Alternatively, if you would like to use our default policy, use CertificatePolicy.get_default()
    cert_policy = CertificatePolicy(
        issuer_name=WellKnownIssuerNames.self,
        subject="CN=*.microsoft.com",
        san_dns_names=["sdk.azure-int.net"],
        exportable=True,
        key_type="RSA",
        key_size=2048,
        reuse_key=False,
        content_type=CertificateContentType.pkcs12,
        validity_in_months=24,
    )
    cert_name = "HelloWorldCertificateAsync"

    # Awaiting create_certificate will return the certificate as a KeyVaultCertificate
    # if creation is successful, and the CertificateOperation if not.
    certificate = await client.create_certificate(certificate_name=cert_name, policy=cert_policy)
    print(f"Certificate with name '{certificate.name}' created")

    # Let's get the bank certificate using its name
    print("\n.. Get a certificate by name")
    bank_certificate = await client.get_certificate(cert_name)
    assert bank_certificate.name
    print(f"Certificate with name '{bank_certificate.name}' was found.")

    # After one year, the bank account is still active, and we have decided to update the tags.
    print("\n.. Update a certificate by name")
    tags = {"a": "b"}
    updated_certificate = await client.update_certificate_properties(certificate_name=bank_certificate.name, tags=tags)
    assert updated_certificate.properties
    print(
        f"Certificate with name '{bank_certificate.name}' was updated on date "
        f"'{updated_certificate.properties.updated_on}'"
    )
    print(
        f"Certificate with name '{bank_certificate.name}' was updated with tags '{updated_certificate.properties.tags}'"
    )

    # The bank account was closed, need to delete its credentials from the Key Vault.
    print("\n.. Delete certificate")
    deleted_certificate = await client.delete_certificate(bank_certificate.name)
    print("Deleting certificate..")
    print(f"Certificate with name '{deleted_certificate.name}' was deleted.")

    print("\nrun_sample done")
    await credential.close()
    await client.close()


if __name__ == "__main__":
    asyncio.run(run_sample())