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(ns net.mycyclopedia.model.statement
  (:use net.mycyclopedia.model
        (clojure.contrib str-utils)
        (net.mycyclopedia.model
         [auth :only (current-user)])
        (compojure [html :exclude (link-to)] 
									 http)
        compojure.validation.predicates
        [clojure.contrib.sql :only (with-query-results
                                       transaction
                                       do-commands
                                     insert-records)])
  (:require (net.mycyclopedia.model
						 [user :as user])
						(clj-record
						 [boot :as boot]
						 [core :as core]
						 [query :as q]))
  (:import (org.joda.time DateTime)))

(core/init-model
 (:associations
  (belongs-to users :on user)
  (belongs-to entries :as subject :on subj)
  (belongs-to entries :as object :on obj)
  (belongs-to predicates :on pred)))

(defmethod link-to :statement
	[statement]
	(compojure.html/link-to (uri statement) (:id statement)))

(defn check-user
	"If the statement map does not have a user, assoc one from (current-user)"
	[statement]
	(if (:user statement)
		statement
		;; TODO: test value here
		(assoc statement :user 1)))

(defn check-created
	[statement]
	(if (:created statement)
		statement
		(assoc statement :created (.toString (DateTime.) "yyyy-MM-dd HH:mm:ss"))))

(defn check-number
	[statement sym]
	(if (present? (sym statement))
		(if (integer? (sym statement))
			statement
			(assoc statement sym (Integer/parseInt (sym statement))))
		(dissoc statement sym)))

(defn valid-statement?
  [statement]
  (and (:subj statement)
       (:pred statement)
       (or (:obj statement)
           (and (:value statement)
								(or (:lang statement)
										(:datatype statement)))
           (:uri statement))
			 (:user statement)
			 (:created statement)
			 (:privacy statement)
       (not (and (:obj statement)
                 (:value statement)))
       (-> statement 
           check-user 
           check-created
           (check-number :subj)
           (check-number :obj))))

;; Actions
(defn show
  [id]
  (first
   (find-records
    (q/and-conditions 
     {:id id}
     (q/or-conditions
      {:privacy 0}
      {:user (:id (current-user))}))
    :limit 1)))

(defn index
  []
  (find-records 
     (q/or-conditions
      {:privacy 0}
      {:user (:id (current-user))})
     :order {:created :desc}))

(defn create
  [& params]
  (core/create "statements" (dissoc params) :*))