(in-package #:nekod.docker)

(defun list-volumes (sock)
  "List all Docker volumes on this host.
   Returns JSON body (Volumes array + Warnings) as a string."
  (multiple-value-bind (status body)
      (docker-get sock "/volumes")
    (if (= status 200) body
        (error 'nekod:docker-api-error :message body :status-code status
               :endpoint "/volumes"))))

(defun inspect-volume (sock name)
  "Inspect a Docker volume by name.
   Returns full JSON metadata as a string."
  (multiple-value-bind (status body)
      (docker-get sock (format nil "/volumes/~a" name))
    (if (= status 200) body
        (error 'nekod:docker-api-error :message body :status-code status
               :endpoint (format nil "/volumes/~a" name)))))

(defun create-volume (sock name &key (driver "local") driver-opts labels)
  "Create a Docker volume.
   name        — volume name
   driver      — storage driver, defaults to \"local\"
   driver-opts — alist of driver-specific options
   labels      — alist of string key-value metadata pairs
   Returns JSON body (contains volume metadata) as a string."
  (let ((body (format nil
                      "{\"Name\":~s,\"Driver\":~s,\"DriverOpts\":{~{~s:~s~^,~}},\"Labels\":{~{~s:~s~^,~}}}"
                      name
                      driver
                      (loop for (k . v) in (or driver-opts '()) nconc (list k v))
                      (loop for (k . v) in (or labels '()) nconc (list k v)))))
    (multiple-value-bind (status resp)
        (docker-post sock "/volumes/create" body)
      (if (= status 201) resp
          (error 'nekod:docker-api-error :message resp :status-code status
                 :endpoint "/volumes/create")))))

(defun remove-volume (sock name &optional (force nil))
  "Remove a Docker volume by name.
   force — forcefully remove even if in use (Docker 1.9+).
   Returns t on success."
  (multiple-value-bind (status body)
      (docker-delete sock (format nil "/volumes/~a?force=~a"
                                  name (if force "true" "false")))
    (if (= status 204) t
        (error 'nekod:docker-api-error :message body :status-code status
               :endpoint (format nil "/volumes/~a" name)))))

(defun prune-volumes (sock)
  "Remove all unused Docker volumes (not referenced by any container).
   WARNING: data loss is permanent.
   Returns JSON summary (SpaceReclaimed) as a string."
  (multiple-value-bind (status body)
      (docker-post sock "/volumes/prune")
    (if (= status 200) body
        (error 'nekod:docker-api-error :message body :status-code status
               :endpoint "/volumes/prune"))))