#!/usr/bin/env bash
set -eo pipefail
[[ $DOKKU_TRACE ]] && set -x
source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
source "$PLUGIN_AVAILABLE_PATH/config/functions"

migrate_checks_vars_0_5_0() {
  declare desc="migrates deprecated CHECKS config variables to simplified counter part introduced in 0.5.x"
  local APPS="$(dokku_apps)"
  local GLOBAL_SKIP_ALL_CHECKS=$(config_get --global DOKKU_SKIP_ALL_CHECKS || true)
  local GLOBAL_SKIP_DEFAULT_CHECKS=$(config_get --global DOKKU_SKIP_DEFAULT_CHECKS || true)

  local app

  for app in $APPS; do
    local APP_SKIP_ALL_CHECKS=$(config_get "$app" DOKKU_SKIP_ALL_CHECKS || true)
    local APP_SKIP_DEFAULT_CHECKS=$(config_get "$app" DOKKU_SKIP_DEFAULT_CHECKS || true)

    if [[ "$APP_SKIP_ALL_CHECKS" == "true" ]] || [[ "$APP_SKIP_DEFAULT_CHECKS" == "true" ]] || [[ "$GLOBAL_SKIP_ALL_CHECKS" == "true" ]] || [[ "$GLOBAL_SKIP_DEFAULT_CHECKS" == "true" ]]; then
      dokku_log_info1 "Migrating zero downtime env variables to 0.5.x. The following variables have been deprecated"
      dokku_log_info2 "DOKKU_SKIP_ALL_CHECKS DOKKU_SKIP_DEFAULT_CHECKS"
      dokku_log_info2 "Please use dokku checks:[disable|enable] <app> to control zero downtime functionality"
      dokku_log_info2 ""
      dokku_log_info2 "zero downtime checks disabled for app ($app)"
      DOKKU_QUIET_OUTPUT=1 config_set --no-restart "$app" DOKKU_CHECKS_ENABLED=0
    fi
    if [[ -n "$APP_SKIP_ALL_CHECKS" ]] || [[ -n "$APP_SKIP_DEFAULT_CHECKS" ]]; then
      DOKKU_QUIET_OUTPUT=1 config_unset --no-restart "$app" DOKKU_SKIP_ALL_CHECKS DOKKU_SKIP_DEFAULT_CHECKS
    fi
  done

  if [[ -n "$GLOBAL_SKIP_ALL_CHECKS" ]] || [[ -n "$GLOBAL_SKIP_DEFAULT_CHECKS" ]]; then
    dokku_log_info1 "Removing global zero downtime settings"
    DOKKU_QUIET_OUTPUT=1 config_unset --global DOKKU_SKIP_ALL_CHECKS DOKKU_SKIP_DEFAULT_CHECKS
  fi
}

migrate_checks_vars_0_6_0() {
  declare desc="migrates CHECKS config variables from 0.5.x to support fully-disabled zero-downtime checks"
  local APPS="$(dokku_apps)"

  local app

  for app in $APPS; do
    local APP_DOKKU_CHECKS_ENABLED=$(config_get "$app" DOKKU_CHECKS_ENABLED || true)
    if [[ $APP_DOKKU_CHECKS_ENABLED ]]; then
      dokku_log_info1 "Migrating zero downtime env variables to 0.6.x. The following variables will be migrated"
      dokku_log_info2 "DOKKU_CHECKS_ENABLED -> DOKKU_CHECKS_SKIPPED"
      if [[ "$APP_DOKKU_CHECKS_ENABLED" == "0" ]]; then
        dokku_log_info2 ""
        dokku_log_info2 "zero downtime checks disabled for app ($app)"
        DOKKU_QUIET_OUTPUT=1 config_set --no-restart "$app" DOKKU_CHECKS_SKIPPED="_all_"
      fi
      DOKKU_QUIET_OUTPUT=1 config_unset --no-restart "$app" DOKKU_CHECKS_ENABLED || true
    fi
  done
}

trigger-checks-install() {
  declare desc="installs the checks plugin"
  declare trigger="install"

  migrate_checks_vars_0_5_0 "$@"
  migrate_checks_vars_0_6_0 "$@"
}

trigger-checks-install "$@"
