#!/bin/sh

OUTPUT="${1:?usage: gen-config.sh OUTPUT_FILE}"

EDITION=$(printf '%s' "${SHELLHUB_EDITION:-community}" | tr '[:upper:]' '[:lower:]' | tr -d '[:space:]')

case "$EDITION" in
    community|enterprise|cloud) ;;
    *)
        echo "🚫 ERROR: invalid SHELLHUB_EDITION '$EDITION': must be community, enterprise, or cloud." >&2
        exit 1
        ;;
esac

require_bool() {
    case "$2" in
        true|false) ;;
        *)
            echo "🚫 ERROR: invalid $1 '$2': must be true or false." >&2
            exit 1
            ;;
    esac
}

require_bool SHELLHUB_WEB_ENDPOINTS "${SHELLHUB_WEB_ENDPOINTS:-false}"

SHELLHUB_MAP_STYLE="${SHELLHUB_MAP_STYLE:-outline}"

case "$SHELLHUB_MAP_STYLE" in
    outline|openfreemap|http://*|https://*) ;;
    *)
        echo "🚫 ERROR: invalid SHELLHUB_MAP_STYLE '$SHELLHUB_MAP_STYLE': must be outline, openfreemap, or an http(s) URL to a map style." >&2
        exit 1
        ;;
esac

json_string() {
    printf '%s' "$1" |
        tr -d '\000-\010\013\014\016-\037' |
        sed \
            -e ':a' -e '$!{N;ba' -e '}' \
            -e 's/\\/\\\\/g' \
            -e 's/"/\\"/g' \
            -e "s/$(printf '\t')/\\\\t/g" \
            -e "s/$(printf '\r')/\\\\r/g" \
            -e 's/\n/\\n/g'
}

cat > "$OUTPUT" <<EOF
{
  "version": "$(json_string "${SHELLHUB_VERSION:-}")",
  "edition": "${EDITION}",
  "onboardingUrl": "$(json_string "${SHELLHUB_ONBOARDING_URL:-}")",
  "webEndpoints": ${SHELLHUB_WEB_ENDPOINTS:-false},
  "stripePublishableKey": "$(json_string "${SHELLHUB_STRIPE_PUBLISHABLE_KEY:-}")",
  "chatwootWebsiteToken": "$(json_string "${SHELLHUB_CHATWOOT_WEBSITE_TOKEN:-}")",
  "chatwootBaseUrl": "$(json_string "${SHELLHUB_CHATWOOT_BASEURL:-}")",
  "mapStyle": "$(json_string "$SHELLHUB_MAP_STYLE")"
}
EOF