set fallback := true

export MLFLOW_NAMESPACE := env("MLFLOW_NAMESPACE", "mlflow")
export MLFLOW_CHART_VERSION := env("MLFLOW_CHART_VERSION", "1.8.0")
export MLFLOW_HOST := env("MLFLOW_HOST", "")
export POSTGRES_NAMESPACE := env("POSTGRES_NAMESPACE", "postgres")
export MINIO_NAMESPACE := env("MINIO_NAMESPACE", "minio")
export EXTERNAL_SECRETS_NAMESPACE := env("EXTERNAL_SECRETS_NAMESPACE", "external-secrets")
export K8S_VAULT_NAMESPACE := env("K8S_VAULT_NAMESPACE", "vault")
export PROMETHEUS_NAMESPACE := env("PROMETHEUS_NAMESPACE", "monitoring")

[private]
default:
    @just --list --unsorted --list-submodules

# Add Helm repository
add-helm-repo:
    helm repo add community-charts https://community-charts.github.io/helm-charts
    helm repo update

# Remove Helm repository
remove-helm-repo:
    helm repo remove community-charts

# Create namespace
create-namespace:
    @kubectl get namespace ${MLFLOW_NAMESPACE} &>/dev/null || \
        kubectl create namespace ${MLFLOW_NAMESPACE}

# Delete namespace
delete-namespace:
    @kubectl delete namespace ${MLFLOW_NAMESPACE} --ignore-not-found

# Setup PostgreSQL database and user for MLflow
setup-postgres-db:
    #!/bin/bash
    set -euo pipefail
    echo "Setting up PostgreSQL database for MLflow..."

    if just postgres::db-exists mlflow &>/dev/null; then
        echo "Database 'mlflow' already exists."
    else
        echo "Creating new database 'mlflow'..."
        just postgres::create-db mlflow
    fi

    if just postgres::user-exists mlflow &>/dev/null; then
        echo "User 'mlflow' already exists."
        if helm status external-secrets -n ${EXTERNAL_SECRETS_NAMESPACE} &>/dev/null; then
            if db_password=$(just vault::get mlflow/postgres password 2>/dev/null); then
                echo "Using existing password from Vault."
            else
                echo "Generating new password and updating Vault..."
                db_password=$(just utils::random-password)
                just postgres::psql -c "ALTER USER mlflow WITH PASSWORD '${db_password}';"
            fi
        else
            echo "Generating new password for existing user..."
            db_password=$(just utils::random-password)
            just postgres::psql -c "ALTER USER mlflow WITH PASSWORD '${db_password}';"
        fi
    else
        echo "Creating new user 'mlflow'..."
        db_password=$(just utils::random-password)
        just postgres::create-user mlflow "${db_password}"
    fi

    echo "Ensuring database permissions..."
    just postgres::grant mlflow mlflow

    if helm status external-secrets -n ${EXTERNAL_SECRETS_NAMESPACE} &>/dev/null; then
        echo "External Secrets available. Storing credentials in Vault..."
        just vault::put mlflow/postgres username=mlflow password="${db_password}"
        echo "PostgreSQL credentials stored in Vault"
    else
        echo "External Secrets not available. Password will be stored in Kubernetes Secret only."
        if helm status vault -n ${K8S_VAULT_NAMESPACE} &>/dev/null; then
            just vault::put mlflow/postgres username=mlflow password="${db_password}"
            echo "PostgreSQL credentials also stored in Vault for backup"
        fi
    fi
    echo "PostgreSQL setup completed"

# Create PostgreSQL credentials secret
create-db-secret:
    #!/bin/bash
    set -euo pipefail
    just create-namespace
    echo "Creating PostgreSQL credentials secret..."

    if helm status external-secrets -n ${EXTERNAL_SECRETS_NAMESPACE} &>/dev/null; then
        echo "Creating ExternalSecret for PostgreSQL credentials..."
        kubectl delete secret mlflow-db-secret -n ${MLFLOW_NAMESPACE} --ignore-not-found
        kubectl delete externalsecret mlflow-db-external-secret -n ${MLFLOW_NAMESPACE} --ignore-not-found

        gomplate -f mlflow-db-external-secret.gomplate.yaml | kubectl apply -f -

        echo "Waiting for ExternalSecret to sync..."
        kubectl wait --for=condition=Ready externalsecret/mlflow-db-external-secret \
            -n ${MLFLOW_NAMESPACE} --timeout=60s
        echo "ExternalSecret synced successfully"
    else
        echo "External Secrets not available. Creating Kubernetes Secret directly..."
        db_username=$(just vault::get mlflow/postgres username 2>/dev/null || echo "mlflow")
        db_password=$(just vault::get mlflow/postgres password 2>/dev/null)

        if [ -z "${db_password}" ]; then
            echo "Error: PostgreSQL password not found in Vault"
            echo "Please run 'just mlflow::setup-postgres-db' first"
            exit 1
        fi

        kubectl delete secret mlflow-db-secret -n ${MLFLOW_NAMESPACE} --ignore-not-found
        kubectl create secret generic mlflow-db-secret -n ${MLFLOW_NAMESPACE} \
            --from-literal=username="${db_username}" \
            --from-literal=password="${db_password}"
        echo "Kubernetes Secret created"
    fi

# Delete PostgreSQL secret
delete-db-secret:
    @kubectl delete secret mlflow-db-secret -n ${MLFLOW_NAMESPACE} --ignore-not-found
    @kubectl delete externalsecret mlflow-db-external-secret -n ${MLFLOW_NAMESPACE} --ignore-not-found

# Create MinIO/S3 credentials secret
create-s3-secret:
    #!/bin/bash
    set -euo pipefail
    just create-namespace
    echo "Creating MinIO/S3 credentials secret..."

    if ! kubectl get secret minio -n ${MINIO_NAMESPACE} &>/dev/null; then
        echo "Error: MinIO root credentials not found"
        echo "Please install MinIO first with 'just minio::install'"
        exit 1
    fi

    accesskey=$(kubectl get secret minio -n ${MINIO_NAMESPACE} \
        -o jsonpath='{.data.rootUser}' | base64 --decode)
    secretkey=$(kubectl get secret minio -n ${MINIO_NAMESPACE} \
        -o jsonpath='{.data.rootPassword}' | base64 --decode)

    if helm status external-secrets -n ${EXTERNAL_SECRETS_NAMESPACE} &>/dev/null; then
        echo "Creating ExternalSecret for MinIO credentials..."
        just vault::put mlflow/s3 accesskey="${accesskey}" secretkey="${secretkey}"

        kubectl delete secret mlflow-s3-secret -n ${MLFLOW_NAMESPACE} --ignore-not-found
        kubectl delete externalsecret mlflow-s3-external-secret -n ${MLFLOW_NAMESPACE} --ignore-not-found

        gomplate -f mlflow-s3-external-secret.gomplate.yaml | kubectl apply -f -

        echo "Waiting for ExternalSecret to sync..."
        kubectl wait --for=condition=Ready externalsecret/mlflow-s3-external-secret \
            -n ${MLFLOW_NAMESPACE} --timeout=60s
        echo "ExternalSecret synced successfully"
    else
        echo "External Secrets not available. Creating Kubernetes Secret directly..."
        kubectl delete secret mlflow-s3-secret -n ${MLFLOW_NAMESPACE} --ignore-not-found
        kubectl create secret generic mlflow-s3-secret -n ${MLFLOW_NAMESPACE} \
            --from-literal=AWS_ACCESS_KEY_ID="${accesskey}" \
            --from-literal=AWS_SECRET_ACCESS_KEY="${secretkey}"
        echo "Kubernetes Secret created"

        if helm status vault -n ${K8S_VAULT_NAMESPACE} &>/dev/null; then
            just vault::put mlflow/s3 accesskey="${accesskey}" secretkey="${secretkey}"
            echo "MinIO credentials also stored in Vault for backup"
        fi
    fi

# Delete MinIO/S3 secret
delete-s3-secret:
    @kubectl delete secret mlflow-s3-secret -n ${MLFLOW_NAMESPACE} --ignore-not-found
    @kubectl delete externalsecret mlflow-s3-external-secret -n ${MLFLOW_NAMESPACE} --ignore-not-found

# Install MLflow
install: check-env
    #!/bin/bash
    set -euo pipefail
    echo "Installing MLflow..."
    just create-namespace

    if ! kubectl get service postgres-cluster-rw -n ${POSTGRES_NAMESPACE} &>/dev/null; then
        echo "Error: PostgreSQL cluster not found"
        echo "Please install PostgreSQL first with 'just postgres::install'"
        exit 1
    fi

    if ! kubectl get service minio -n ${MINIO_NAMESPACE} &>/dev/null; then
        echo "Error: MinIO not found"
        echo "Please install MinIO first with 'just minio::install'"
        exit 1
    fi

    just setup-postgres-db
    just create-db-secret
    just create-s3-secret

    # Create mlflow bucket in MinIO if it doesn't exist
    if ! just minio::bucket-exists mlflow; then
        echo "Creating 'mlflow' bucket in MinIO..."
        just minio::create-bucket mlflow
    else
        echo "Bucket 'mlflow' already exists"
    fi

    just add-helm-repo

    echo "Generating Helm values..."
    gomplate -f values.gomplate.yaml -o values.yaml

    echo "Installing MLflow Helm chart from Community Charts..."
    helm upgrade --cleanup-on-fail --install mlflow \
        community-charts/mlflow \
        --version ${MLFLOW_CHART_VERSION} \
        -n ${MLFLOW_NAMESPACE} \
        --wait \
        --timeout=10m \
        -f values.yaml

    echo ""
    echo "=== MLflow installed ==="
    echo "MLflow URL: https://${MLFLOW_HOST}"
    echo ""
    echo "Next steps:"
    echo "  1. Configure OAuth2 Proxy for authentication (recommended)"
    echo "  2. Access MLflow UI at https://${MLFLOW_HOST}"

# Upgrade MLflow
upgrade: check-env
    #!/bin/bash
    set -euo pipefail
    echo "Upgrading MLflow..."

    echo "Generating Helm values..."
    gomplate -f values.gomplate.yaml -o values.yaml

    echo "Upgrading MLflow Helm chart from Community Charts..."
    helm upgrade mlflow \
        community-charts/mlflow \
        --version ${MLFLOW_CHART_VERSION} \
        -n ${MLFLOW_NAMESPACE} \
        --wait \
        --timeout=10m \
        -f values.yaml

    echo "MLflow upgraded successfully"
    echo "Access MLflow at: https://${MLFLOW_HOST}"

# Uninstall MLflow
uninstall delete-db='true':
    #!/bin/bash
    set -euo pipefail
    echo "Uninstalling MLflow..."
    helm uninstall mlflow -n ${MLFLOW_NAMESPACE} --ignore-not-found
    just delete-db-secret
    just delete-s3-secret
    just delete-namespace
    if [ "{{ delete-db }}" = "true" ]; then
        just postgres::delete-db mlflow || true
        just postgres::delete-user mlflow || true
    fi
    echo "MLflow uninstalled"

# Clean up all MLflow resources
cleanup:
    #!/bin/bash
    set -euo pipefail
    echo "This will delete the MLflow database, user, and all secrets."
    if gum confirm "Are you sure you want to proceed?"; then
        echo "Cleaning up MLflow resources..."
        just postgres::delete-db mlflow || true
        just postgres::delete-user mlflow || true
        just vault::delete mlflow/postgres || true
        just vault::delete mlflow/s3 || true
        echo "Cleanup completed"
    else
        echo "Cleanup cancelled"
    fi

# Check the environment
[private]
check-env:
    #!/bin/bash
    set -euo pipefail
    if [ -z "${MLFLOW_HOST}" ]; then
        while [ -z "${MLFLOW_HOST}" ]; do
            MLFLOW_HOST=$(
                gum input --prompt="MLflow host (FQDN): " --width=100 \
                --placeholder="e.g., mlflow.example.com"
            )
        done
        just env::set MLFLOW_HOST="${MLFLOW_HOST}"
    fi