target = [
    # dev
    # {"region": "us-west1", "cluster_name": "o11y-staging-regional-us-west1"},

    # stg

    # prod
    {"region": "eastus2", "cluster_name": "o11y-prod-regional-eastus2"},
    {"region": "japaneast", "cluster_name": "o11y-prod-regional-japaneast"},
    {"region": "southeastasia", "cluster_name": "o11y-prod-regional-southeastasia"},
    {"region": "westeurope", "cluster_name": "o11y-prod-regional-westeurope"},
]


def _safe_name(s: str) -> str:
    return "".join(c if c.isalnum() or c in "-._" else "-" for c in s)


def generate_commands(targets):
    for i, t in enumerate(targets, start=1):
        region = t.get("region", "")
        cluster = t.get("cluster_name", "")

        # if the cluster name contains the region, replace that part with a shell variable reference
        if region and region in cluster:
            cluster_template = cluster.replace(region, "${region}")
        else:
            cluster_template = cluster

        # use shell variables for region / cluster_name / state_file
        # state_file references the exported region variable so each target has an independent state file
        plan_file = "plan-${region}.tfplan"

        plan_cmd = (
            'terraform plan -input=false \\\n'
            '    -var "region=${region}" \\\n'
            '    -var "cluster_name=${cluster_name}" \\\n'
            '    -var "resource_group_name=${cluster_name}" \\\n'
            '    -var "subscription_id=01f5d24b-a99c-45e1-a3e2-5ddc1e5bb71d" \\\n'
            '    -state="${state_file}" \\\n'
            f'    -out={plan_file}'
        )

        apply_cmd = 'terraform apply -input=false -state="${state_file}" ' + plan_file

        print(f"# target {i}")
        # export the region (concrete value), cluster_name (template or concrete), and state_file (uses ${region})
        print(f'export region="{region}"')
        print(f'export cluster_name="{cluster_template}"')
        print('export state_file="terraform-${region}.tfstate"')
        print()
        print(plan_cmd)
        print()
        print(apply_cmd)
        print("\n" + ("-" * 60) + "\n")


if __name__ == "__main__":
    generate_commands(target)