local mirko = import "../../kube/mirko.libsonnet";
local kube = import "../../kube/kube.libsonnet";

// Deploy SourceGraph, a code serach tool. Its configuration is fully managed
// within sourcegraph itself, including user accounts.

{
    cfg:: {
        image: "sourcegraph/server:3.17.1",
        publicFQDN: error "public FQDN must be set",
        storageClassName: "waw-hdd-redundant-3",
    },

    component(cfg, env):: mirko.Component(env, "sourcegraph") {
        local sourcegraph = self,
        cfg+: {
            image: cfg.image,
            volumes+: {
                data: kube.PersistentVolumeClaimVolume(sourcegraph.pvc.data),
                etc: kube.PersistentVolumeClaimVolume(sourcegraph.pvc.etc),
            },
            securityContext: {
                runAsUser: 0,
                fsGroup: 0,
            },
            // This container fixes some permissions that Kubernetes volume mounts break.
            initContainer: sourcegraph.Container("fixperms") {
                image: "alpine:3",
                volumeMounts_+: {
                    data: { mountPath: "/var/opt/sourcegraph" },
                },
                ports_: {},
                command: [
                    "sh", "-c",
                    "chmod 755 /var/opt/sourcegraph; chmod -R 700 /var/opt/sourcegraph/postgresql",
                ],
            },
            container: sourcegraph.Container("main") {
                volumeMounts_+: {
                    data: { mountPath: "/var/opt/sourcegraph" },
                    etc: { mountPath: "/etc/sourcegraph" },
                },
                resources: {
                    requests: {
                        cpu: "100m",
                        memory: "1Gi",
                    },
                    limits: {
                        cpu: "1",
                        memory: "2Gi",
                    },
                },
            },
            ports+: {
                publicHTTP: {
                    public: {
                        port: 7080,
                        dns: cfg.publicFQDN,
                        // Authenticate as 'Anonymous' user by default. This is done in tandem
                        // with Sourcegraphs authenticate-by-http-header feature, and is a
                        // workaround for the lack of a public view in the self-hosted free
                        // version of Sourcegraph.
                        // https://twitter.com/sqs/status/1272659451292422144
                        setHeaders: ["X-Forwarded-User Anonymous"],
                    },
                },
            },
            extraPaths: [
                {
                    // Redirect anonymous user settings to a service that doesn't
                    // have any endpoints/backends.
                    path: "/users/Anonymous/settings",
                    backend: { serviceName: sourcegraph.blocksvc.metadata.name, servicePort: 8080 },
                },
            ],
        },

        blocksvc: kube.Service(sourcegraph.makeName("blocksvc")) {
            metadata+: sourcegraph.metadata,
            spec+: {
                selector: null,
                ports: [{ port: 2137, targetPort: 2137 }],
            },
        },

        pvc: {
            data: kube.PersistentVolumeClaim(sourcegraph.makeName("data")) {
                metadata+: sourcegraph.metadata,
                spec+: {
                    storageClassName: cfg.storageClassName,
                    accessModes: [ "ReadWriteOnce" ],
                    resources: {
                        requests: {
                            storage: "40Gi",
                        },
                    },
                },
            },
            etc: kube.PersistentVolumeClaim(sourcegraph.makeName("etc")) {
                metadata+: sourcegraph.metadata,
                spec+: {
                    storageClassName: cfg.storageClassName,
                    accessModes: [ "ReadWriteOnce" ],
                    resources: {
                        requests: {
                            storage: "4Gi",
                        },
                    },
                },
            },
        },
    }
}