#!/usr/bin/env bash
set -euo pipefail

usage() {
    cat <<'EOF'
Deploy a pre-built APP_IMAGE to one or more AndyTranscribe directories.

Environment:
  APP_IMAGE       Required. e.g. gitea.z00.nu/ben/andytranscribe:abc1234
  DEPLOY_PATHS    Comma-separated instance directories (default: current directory)
  GIT_PULL        When 1 (default), run git pull --ff-only in each directory first

Usage:
  APP_IMAGE=gitea.z00.nu/ben/andytranscribe:tag DEPLOY_PATHS=$HOME/andyTranscibe ./scripts/deploy-production.sh
EOF
}

IMAGE="${APP_IMAGE:-${1:-}}"
if [[ -z "${IMAGE}" ]]; then
    usage >&2
    exit 1
fi

PATHS_CSV="${DEPLOY_PATHS:-${2:-.}}"
GIT_PULL="${GIT_PULL:-1}"
IFS=',' read -r -a DIRS <<< "${PATHS_CSV}"

for dir in "${DIRS[@]}"; do
    dir="${dir#"${dir%%[![:space:]]*}"}"
    dir="${dir%"${dir##*[![:space:]]}"}"

    if [[ ! -d "${dir}" ]]; then
        echo "Missing instance directory: ${dir}" >&2
        exit 1
    fi

    name="$(basename "${dir}")"
    echo "==> Deploying ${IMAGE} in ${dir}"

    (
        cd "${dir}"

        if [[ "${GIT_PULL}" == "1" ]] && git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
            git pull --ff-only
        fi

        export APP_IMAGE="${IMAGE}"
        export COMPOSE_PROJECT_NAME="${COMPOSE_PROJECT_NAME:-${name,,}}"

        compose_files=(-f docker-compose.yml)
        if [[ -f compose.z00.yaml ]]; then
            compose_files+=(-f compose.z00.yaml)
        fi

        if grep -q '^APP_IMAGE=' .env 2>/dev/null; then
            sed -i "s|^APP_IMAGE=.*|APP_IMAGE=${IMAGE}|" .env
        else
            printf '\nAPP_IMAGE=%s\n' "${IMAGE}" >> .env
        fi

        docker compose "${compose_files[@]}" pull app queue reverb
        docker compose "${compose_files[@]}" up -d
        docker compose "${compose_files[@]}" ps

        app_port="$(awk -F= '/^APP_HOST_PORT=/ {print $2; exit}' .env 2>/dev/null || true)"
        app_port="${app_port:-18080}"
        health_url="http://127.0.0.1:${app_port}/up"
        echo "waiting for ${health_url}"
        ok=0
        for _ in $(seq 1 45); do
            if curl -fsS "${health_url}" >/dev/null 2>&1; then
                echo "healthy"
                ok=1
                break
            fi
            sleep 2
        done
        if [[ "${ok}" -ne 1 ]]; then
            echo "ERROR: health check failed for ${name}" >&2
            exit 1
        fi
    )
done

echo "Deploy complete: ${IMAGE}"