use k8s_openapi::api::apps::v1::{Deployment, DeploymentSpec};
use k8s_openapi::api::core::v1::{
    Container, ContainerPort, EnvVar, PodSpec, PodTemplateSpec, Service, ServicePort, ServiceSpec,
};
use k8s_openapi::apimachinery::pkg::apis::meta::v1::LabelSelector;
use kube::api::{ListParams, ObjectMeta, Patch, PatchParams};
use kube::{Api, Client, Error};
use std::collections::BTreeMap;
use tracing::{info, instrument};

const NAME: &str = "minio";

pub async fn create_deployment(client: Client, namespace: &str) -> Result<(), Error> {
    let minio_container = Container {
        name: NAME.to_string(),
        env: Some(vec![
            EnvVar {
                name: "MINIO_ROOT_USER".to_string(),
                value: Some("minio".to_string()),
                ..Default::default()
            },
            EnvVar {
                name: "MINIO_ROOT_PASSWORD".to_string(),
                value: Some("password".to_string()),
                ..Default::default()
            },
        ]),
        image: Some("quay.io/minio/minio:RELEASE.2022-10-20T00-55-09Z".to_string()),
        ports: Some(vec![
            ContainerPort {
                container_port: 9000,
                ..Default::default()
            },
            ContainerPort {
                container_port: 9001,
                ..Default::default()
            },
        ]),
        args: Some(
            vec![
                "server",
                "/data",
                "--address",
                ":9000",
                "--console-address",
                ":9001",
            ]
            .iter()
            .map(|s| s.to_string())
            .collect::<Vec<String>>(),
        ),
        liveness_probe: Some(k8s_openapi::api::core::v1::Probe {
            http_get: Some(k8s_openapi::api::core::v1::HTTPGetAction {
                path: Some("/minio/health/live".to_string()),
                port: k8s_openapi::apimachinery::pkg::util::intstr::IntOrString::Int(9000),
                ..Default::default()
            }),
            initial_delay_seconds: Some(10),
            period_seconds: Some(30),
            ..Default::default()
        }),
        readiness_probe: Some(k8s_openapi::api::core::v1::Probe {
            http_get: Some(k8s_openapi::api::core::v1::HTTPGetAction {
                path: Some("/minio/health/ready".to_string()),
                port: k8s_openapi::apimachinery::pkg::util::intstr::IntOrString::Int(9000),
                ..Default::default()
            }),
            initial_delay_seconds: Some(10),
            period_seconds: Some(30),
            ..Default::default()
        }),
        ..Default::default()
    };

    let mc_container = Container {
        name: "mc".to_string(),
        env: Some(vec![
            EnvVar {
                name: "MINIO_ROOT_USER".to_string(),
                value: Some("minio".to_string()),
                ..Default::default()
            },
            EnvVar {
                name: "MINIO_ROOT_PASSWORD".to_string(),
                value: Some("password".to_string()),
                ..Default::default()
            },
        ]),
        image: Some("minio/mc".to_string()),
        command: Some(vec!["bash".to_string(), "-c".to_string()]),
        args: Some(vec!["until (/usr/bin/mc alias set minio http://minio:9000 $$MINIO_ROOT_USER $$MINIO_ROOT_PASSWORD) do
             echo 'Waiting to start minio...' && sleep 1;
         done;
         /usr/bin/mc mb --ignore-existing minio/neon --region=eu-north-1;
         sleep inf;".to_string()]),
        ..Default::default()
    };

    let deployment = Deployment {
        metadata: ObjectMeta {
            name: Some(NAME.to_string()),
            namespace: Some(namespace.to_string()),
            labels: Some(BTreeMap::from([("app".to_string(), NAME.to_string())])),
            ..Default::default()
        },
        spec: Some(DeploymentSpec {
            replicas: Some(1),
            selector: LabelSelector {
                match_labels: Some(BTreeMap::from([("app".to_string(), NAME.to_string())])),
                ..Default::default()
            },
            template: PodTemplateSpec {
                metadata: Some(ObjectMeta {
                    labels: Some(BTreeMap::from([("app".to_string(), NAME.to_string())])),
                    ..Default::default()
                }),
                spec: Some(PodSpec {
                    containers: vec![minio_container, mc_container],
                    ..Default::default()
                }),

                ..Default::default()
            },
            ..Default::default()
        }),
        ..Default::default()
    };

    let deployment_api = Api::<Deployment>::namespaced(client, namespace);

    deployment_api
        .patch(
            NAME,
            &PatchParams::apply("neon-operator"),
            &Patch::Apply(deployment),
        )
        .await?;

    Ok(())
}

pub async fn create_service(client: Client, namespace: &str) -> Result<(), Error> {
    let service = Service {
        metadata: ObjectMeta {
            name: Some(NAME.to_string()),
            namespace: Some(namespace.to_string()),
            labels: Some(BTreeMap::from([("app".to_string(), NAME.to_string())])),
            ..Default::default()
        },
        spec: Some(ServiceSpec {
            selector: Some(BTreeMap::from([("app".to_string(), NAME.to_string())])),
            ports: Some(vec![ServicePort {
                port: 9000,
                ..Default::default()
            }]),
            ..Default::default()
        }),
        ..Default::default()
    };

    info!("Reconciling service");
    Api::<Service>::namespaced(client, namespace)
        .patch(
            NAME,
            &PatchParams::apply("neon-operator"),
            &Patch::Apply(service),
        )
        .await?;

    Ok(())
}

#[instrument(err, skip(client))]
pub async fn deployment_exists(client: Client, namespace: &str) -> Result<bool, Error> {
    let deployment_api: Api<Deployment> = Api::namespaced(client, namespace);
    let lp = ListParams {
        label_selector: Some(format!("app={}", NAME)),
        ..Default::default()
    };

    let list_result = deployment_api.list(&lp).await?;
    Ok(list_result.items.len() > 0)
}