;; SX example API handlers — defhandler definitions
;;
;; These serve the live demos on the Examples docs pages.
;; Each handler's source is displayed in the "Server handler" code block
;; on its corresponding example page (self-referencing via handler-source).

;; ---------------------------------------------------------------------------
;; Click to Load
;; ---------------------------------------------------------------------------

(defhandler click (&key)
  (let ((now (format-time (now) "%H:%M:%S")))
    (~click-result :time now)))

;; ---------------------------------------------------------------------------
;; Form Submission
;; ---------------------------------------------------------------------------

(defhandler form (&key)
  (let ((name (form-data "name")))
    (~form-result :name name)))

;; ---------------------------------------------------------------------------
;; Polling
;; ---------------------------------------------------------------------------

(defhandler poll (&key)
  (let ((now   (format-time (now) "%H:%M:%S"))
        (count (inc-counter "poll" :max 10)))
    (~poll-result :time now :count count)))

;; ---------------------------------------------------------------------------
;; Delete Row
;; ---------------------------------------------------------------------------

(defhandler delete (&key item-id)
  ;; Empty response — outerHTML swap removes the row
  "")

;; ---------------------------------------------------------------------------
;; Inline Edit
;; ---------------------------------------------------------------------------

(defhandler edit-form (&key)
  (let ((value (request-arg "value")))
    (~inline-edit-form :value value)))

(defhandler edit-save (&key)
  (let ((value (form-data "value")))
    (~inline-view :value value)))

(defhandler edit-cancel (&key)
  (let ((value (request-arg "value")))
    (~inline-view :value value)))

;; ---------------------------------------------------------------------------
;; Out-of-Band Swaps
;; ---------------------------------------------------------------------------

(defhandler oob (&key)
  (let ((now (format-time (now) "%H:%M:%S")))
    (<>
      (p :class "text-emerald-600 font-medium" "Box A updated!")
      (p :class "text-sm text-stone-500" "at " now)
      (div :id "oob-box-b" :sx-swap-oob "innerHTML"
        (p :class "text-violet-600 font-medium" "Box B updated via OOB!")
        (p :class "text-sm text-stone-500" "at " now)))))

;; ---------------------------------------------------------------------------
;; Lazy Loading
;; ---------------------------------------------------------------------------

(defhandler lazy (&key)
  (let ((now (format-time (now) "%H:%M:%S")))
    (~lazy-result :time now)))

;; ---------------------------------------------------------------------------
;; Infinite Scroll
;; ---------------------------------------------------------------------------

(defhandler scroll (&key)
  (let ((page  (or (parse-int (request-arg "page")) 2))
        (start (+ (* (- page 1) 5) 1))
        (next  (+ page 1)))
    (<>
      (map (fn (i)
        (div :class "px-4 py-3 border-b border-stone-100 text-sm text-stone-700"
          "Item " i " — loaded from page " page))
        (range start (+ start 5)))
      (if (<= next 6)
        (div :id "scroll-sentinel"
          :sx-get (str "/examples/api/scroll?page=" next)
          :sx-trigger "intersect once"
          :sx-target "#scroll-items"
          :sx-swap "beforeend"
          :class "p-3 text-center text-stone-400 text-sm"
          "Loading more...")
        (div :class "p-3 text-center text-stone-500 text-sm font-medium"
          "All items loaded.")))))

;; ---------------------------------------------------------------------------
;; Progress Bar
;; ---------------------------------------------------------------------------

(defhandler progress-start (&key)
  (let ((job-id (new-job)))
    (~progress-status :percent 0 :job-id job-id)))

(defhandler progress-status (&key)
  (let ((job-id  (request-arg "job"))
        (percent (advance-job job-id)))
    (~progress-status :percent percent :job-id job-id)))

;; ---------------------------------------------------------------------------
;; Active Search
;; ---------------------------------------------------------------------------

(defhandler search (&key)
  (let ((q       (request-arg "q"))
        (results (filter-list LANGUAGES q)))
    (~search-results :items results :query q)))

;; ---------------------------------------------------------------------------
;; Inline Validation
;; ---------------------------------------------------------------------------

(defhandler validate (&key)
  (let ((email (request-arg "email")))
    (cond
      ((not email)
        (~validation-error :message "Email is required"))
      ((not (contains? email "@"))
        (~validation-error :message "Invalid email format"))
      ((contains? TAKEN_EMAILS (lower email))
        (~validation-error
          :message (str email " is already taken")))
      (t (~validation-ok :email email)))))

;; ---------------------------------------------------------------------------
;; Value Select
;; ---------------------------------------------------------------------------

(defhandler values (&key)
  (let ((cat   (request-arg "category"))
        (items (get VALUE_SELECT_DATA cat)))
    (if (empty? items)
      (option :value "" "No items")
      (map (fn (i) (option :value i i)) items))))

;; ---------------------------------------------------------------------------
;; Reset on Submit
;; ---------------------------------------------------------------------------

(defhandler reset-submit (&key)
  (let ((msg (or (form-data "message") "(empty)"))
        (now (format-time (now) "%H:%M:%S")))
    (~reset-message :message msg :time now)))

;; ---------------------------------------------------------------------------
;; Edit Row
;; ---------------------------------------------------------------------------

(defhandler editrow-form (&key row-id)
  (let ((row (get ROWS row-id)))
    (~edit-row-form :id row-id
      :name  (get row "name")
      :price (get row "price")
      :stock (get row "stock"))))

(defhandler editrow-save (&key row-id)
  (let ((name  (form-data "name"))
        (price (form-data "price"))
        (stock (form-data "stock")))
    (~edit-row-view :id row-id
      :name name :price price :stock stock)))

(defhandler editrow-cancel (&key row-id)
  (let ((row (get ROWS row-id)))
    (~edit-row-view :id row-id
      :name  (get row "name")
      :price (get row "price")
      :stock (get row "stock"))))

;; ---------------------------------------------------------------------------
;; Bulk Update
;; ---------------------------------------------------------------------------

(defhandler bulk (&key)
  (let ((action (request-arg "action"))
        (ids    (form-list "ids"))
        (status (if (= action "activate")
                    "active" "inactive")))
    (update-users ids :status status)
    (map (fn (u)
      (~bulk-row
        :id     (get u "id")
        :name   (get u "name")
        :email  (get u "email")
        :status (get u "status")))
      USERS)))

;; ---------------------------------------------------------------------------
;; Swap Positions
;; ---------------------------------------------------------------------------

(defhandler swap-log (&key)
  (let ((mode (request-arg "mode"))
        (n    (inc-counter "swap"))
        (now  (format-time (now) "%H:%M:%S")))
    (<>
      (div :class "px-3 py-2 text-sm text-stone-700"
        "[" now "] " mode " (#" n ")")
      (span :id "swap-counter"
        :sx-swap-oob "innerHTML"
        :class "self-center text-sm text-stone-500"
        "Count: " n))))

;; ---------------------------------------------------------------------------
;; Select Filter (Dashboard)
;; ---------------------------------------------------------------------------

(defhandler dashboard (&key)
  (let ((now (format-time (now) "%H:%M:%S")))
    (<>
      (div :id "dash-header" :class "p-3 bg-violet-50 rounded mb-3"
        (h4 :class "font-semibold text-violet-800" "Dashboard Header")
        (p :class "text-sm text-violet-600" "Generated at " now))
      (div :id "dash-stats" :class "grid grid-cols-3 gap-3 mb-3"
        (div :class "p-3 bg-emerald-50 rounded text-center"
          (p :class "text-2xl font-bold text-emerald-700" "142")
          (p :class "text-xs text-emerald-600" "Users"))
        (div :class "p-3 bg-blue-50 rounded text-center"
          (p :class "text-2xl font-bold text-blue-700" "89")
          (p :class "text-xs text-blue-600" "Orders"))
        (div :class "p-3 bg-amber-50 rounded text-center"
          (p :class "text-2xl font-bold text-amber-700" "$4.2k")
          (p :class "text-xs text-amber-600" "Revenue")))
      (div :id "dash-footer" :class "p-3 bg-stone-100 rounded"
        (p :class "text-sm text-stone-500" "Last updated: " now)))))

;; ---------------------------------------------------------------------------
;; Tabs
;; ---------------------------------------------------------------------------

(defhandler tabs (&key tab)
  (let ((content (get TAB_CONTENT tab)))
    (<> content
      (div :id "tab-buttons"
        :sx-swap-oob "innerHTML"
        :class "flex border-b border-stone-200"
        (map (fn (t)
          (~tab-btn
            :tab   (first t)
            :label (last t)
            :active (if (= (first t) tab) "true" "false")))
          TAB_LIST)))))

;; ---------------------------------------------------------------------------
;; Animations
;; ---------------------------------------------------------------------------

(defhandler animate (&key)
  (let ((color (random-choice
           "bg-violet-100" "bg-emerald-100"
           "bg-blue-100" "bg-amber-100"))
        (now (format-time (now) "%H:%M:%S")))
    (~anim-result :color color :time now)))

;; ---------------------------------------------------------------------------
;; Dialogs
;; ---------------------------------------------------------------------------

(defhandler dialog (&key)
  (~dialog-modal
    :title "Confirm Action"
    :message "Are you sure you want to proceed?"))

(defhandler dialog-close (&key)
  "")

;; ---------------------------------------------------------------------------
;; Keyboard Shortcuts
;; ---------------------------------------------------------------------------

(defhandler keyboard (&key)
  (let ((key    (request-arg "key"))
        (actions {:s "Search panel activated"
                  :n "New item created"
                  :h "Help panel opened"})
        (action (get actions key)))
    (~kbd-result :key key :action action)))

;; ---------------------------------------------------------------------------
;; PUT / PATCH
;; ---------------------------------------------------------------------------

(defhandler pp-edit-all (&key)
  (let ((p (get-profile)))
    (~pp-form-full
      :name  (get p "name")
      :email (get p "email")
      :role  (get p "role"))))

(defhandler put-profile (&key)
  (let ((name  (form-data "name"))
        (email (form-data "email"))
        (role  (form-data "role")))
    (~pp-view :name name :email email :role role)))

(defhandler pp-cancel (&key)
  (let ((p (get-profile)))
    (~pp-view
      :name  (get p "name")
      :email (get p "email")
      :role  (get p "role"))))

;; ---------------------------------------------------------------------------
;; JSON Encoding
;; ---------------------------------------------------------------------------

(defhandler json-echo (&key)
  (let ((data (request-json))
        (body (json-pretty data))
        (ct   (request-header "content-type")))
    (~json-result :body body :content-type ct)))

;; ---------------------------------------------------------------------------
;; Vals & Headers
;; ---------------------------------------------------------------------------

(defhandler echo-vals (&key)
  (let ((vals (request-args)))
    (~echo-result :label "values" :items vals)))

(defhandler echo-headers (&key)
  (let ((headers (request-headers :prefix "X-")))
    (~echo-result :label "headers" :items headers)))

;; ---------------------------------------------------------------------------
;; Loading States
;; ---------------------------------------------------------------------------

(defhandler slow (&key)
  (sleep 2000)
  (let ((now (format-time (now) "%H:%M:%S")))
    (~loading-result :time now)))

;; ---------------------------------------------------------------------------
;; Request Abort (sync replace)
;; ---------------------------------------------------------------------------

(defhandler slow-search (&key)
  (let ((delay (random-int 500 2000)))
    (sleep delay)
    (let ((q (request-arg "q")))
      (~sync-result :query q :delay delay))))

;; ---------------------------------------------------------------------------
;; Retry
;; ---------------------------------------------------------------------------

(defhandler flaky (&key)
  (let ((n (inc-counter "flaky")))
    (if (!= (mod n 3) 0)
      (error 503)
      (~retry-result :attempt n
        :message "Success! The endpoint finally responded."))))