# Copyright Materialize, Inc. and contributors. All rights reserved.
#
# Use of this software is governed by the Business Source License
# included in the LICENSE file at the root of this repository.
#
# As of the Change Date specified in that file, in accordance with
# the Business Source License, use of this software will be governed
# by the Apache License, Version 2.0.
from pathlib import Path

from kubernetes.client import (
    V1ConfigMap,
    V1ConfigMapVolumeSource,
    V1Container,
    V1ContainerPort,
    V1LabelSelector,
    V1ObjectMeta,
    V1PersistentVolumeClaim,
    V1PersistentVolumeClaimSpec,
    V1PodSpec,
    V1PodTemplateSpec,
    V1ResourceRequirements,
    V1Service,
    V1ServicePort,
    V1ServiceSpec,
    V1StatefulSet,
    V1StatefulSetSpec,
    V1Volume,
    V1VolumeMount,
)

from materialize import MZ_ROOT
from materialize.cloudtest import DEFAULT_K8S_NAMESPACE
from materialize.cloudtest.k8s.api.k8s_config_map import K8sConfigMap
from materialize.cloudtest.k8s.api.k8s_resource import K8sResource
from materialize.cloudtest.k8s.api.k8s_service import K8sService
from materialize.cloudtest.k8s.api.k8s_stateful_set import K8sStatefulSet
from materialize.mzcompose.services.cockroach import Cockroach


class CockroachConfigMap(K8sConfigMap):
    def __init__(self, namespace: str, path_to_setup_script: Path):
        super().__init__(namespace)
        self.config_map = V1ConfigMap(
            metadata=V1ObjectMeta(
                name="cockroach-init",
            ),
            data={
                "setup_materialize.sql": path_to_setup_script.read_text(),
            },
        )


class CockroachService(K8sService):
    def __init__(self, namespace: str):
        super().__init__(namespace)
        service_port = V1ServicePort(name="sql", port=26257)

        self.service = V1Service(
            api_version="v1",
            kind="Service",
            metadata=V1ObjectMeta(name="cockroach", labels={"app": "cockroach"}),
            spec=V1ServiceSpec(
                type="NodePort", ports=[service_port], selector={"app": "cockroach"}
            ),
        )


class CockroachStatefulSet(K8sStatefulSet):
    def __init__(
        self, namespace: str = DEFAULT_K8S_NAMESPACE, apply_node_selectors: bool = False
    ):
        self.apply_node_selectors = apply_node_selectors
        super().__init__(namespace)

    def generate_stateful_set(self) -> V1StatefulSet:
        metadata = V1ObjectMeta(name="cockroach", labels={"app": "cockroach"})
        label_selector = V1LabelSelector(match_labels={"app": "cockroach"})
        ports = [V1ContainerPort(container_port=26257, name="sql")]
        volume_mounts = [
            V1VolumeMount(name="data", mount_path="/cockroach/cockroach-data"),
            V1VolumeMount(
                name="cockroach-init", mount_path="/docker-entrypoint-initdb.d"
            ),
        ]

        volume_config = V1ConfigMapVolumeSource(
            name="cockroach-init",
        )

        volumes = [V1Volume(name="cockroach-init", config_map=volume_config)]

        container = V1Container(
            name="cockroach",
            image=f"cockroachdb/cockroach:{Cockroach.DEFAULT_COCKROACH_TAG}",
            args=["start-single-node", "--insecure"],
            ports=ports,
            volume_mounts=volume_mounts,
        )

        node_selector = None
        if self.apply_node_selectors:
            node_selector = {"supporting-services": "true"}

        pod_spec = V1PodSpec(
            containers=[container],
            volumes=volumes,
            node_selector=node_selector,
        )
        template_spec = V1PodTemplateSpec(metadata=metadata, spec=pod_spec)
        claim_templates = [
            V1PersistentVolumeClaim(
                metadata=V1ObjectMeta(name="data"),
                spec=V1PersistentVolumeClaimSpec(
                    access_modes=["ReadWriteOnce"],
                    resources=V1ResourceRequirements(requests={"storage": "1Gi"}),
                ),
            )
        ]

        return V1StatefulSet(
            api_version="apps/v1",
            kind="StatefulSet",
            metadata=metadata,
            spec=V1StatefulSetSpec(
                service_name="cockroach",
                replicas=1,
                selector=label_selector,
                template=template_spec,
                volume_claim_templates=claim_templates,
            ),
        )


def cockroach_resources(
    namespace: str = DEFAULT_K8S_NAMESPACE,
    path_to_setup_script: Path = MZ_ROOT
    / "misc"
    / "cockroach"
    / "setup_materialize.sql",
    apply_node_selectors: bool = False,
) -> list[K8sResource]:
    return [
        CockroachConfigMap(namespace, path_to_setup_script),
        CockroachService(namespace),
        CockroachStatefulSet(namespace, apply_node_selectors),
    ]