#lang racket

(require web-racket
         racket/runtime-path
         racket/gui
         "utils.rkt"
         "music-library.rkt"
         "translate.rkt"
         )

(provide
 (all-from-out web-racket)
 rktplayer%
 )

(define-runtime-path rktplayer-start "gui/rktplayer.html")

(define player-menu
  (λ ()
    (menu 'main-menu
          (menu-item 'm-file (tr "File")
                     #:submenu
                     (menu (menu-item 'm-select-library-dir (tr "Select Music Library Folder"))
                           (menu-item 'm-set-lang (tr "Set language"))
                           (menu-item 'm-quit (tr "Quit") #:separator #t)))
          )
    ))

(define rktplayer%
  (class ww-webview%
    (inherit-field settings)
    (super-new
     [html-file rktplayer-start]
     )

    (define el-seeker #f)
    (define el-library #f)
    
    (define music-library (send settings get 'music-library (find-system-path 'home-dir)))
    (define current-music-path #f)
    
    (define inner-html-handlers (make-hash))

    (define/override (html-loaded)
      (super html-loaded)

      (ww-connect 'play play)
      (ww-connect 'prev previous-track)
      (ww-connect 'next next-track)
      (ww-connect 'repeat repeat)
      (ww-connect 'volume volume)

      (set! el-seeker (send this element 'seek))
      (displayln (format "el-seeker: ~a" (send el-seeker get)))
      (let ((seek-reactor (make-delayed-reactor 0.3 (λ (percentage) (send this seek-to percentage)))))
        (send el-seeker on-change! seek-reactor))

      (set! el-library (send this element 'library))

      (send this set-menu! (player-menu))
      (send this connect-menu! 'm-quit (λ () (send this quit)))
      (send this connect-menu! 'm-select-library-dir (λ () (send this select-library)))

      (send this update-library)
      )

    (define/public (update-library)
      (when (eq? current-music-path #f)
        (set! current-music-path music-library))
      (let* ((nr 0)
             (l  (filter (λ (r) (music-lib-relevant? (cadr r)))
                         (map (λ (e)
                                (set! nr (+ nr 1))
                                (list (format "row-~a" nr) (build-path current-music-path e) (format "path-~a" nr)))
                              (directory-list current-music-path)))))
        (displayln current-music-path)
        (displayln music-library)
        (unless (equal? (format "~a" current-music-path) (format "~a" music-library))
          (set! l (cons (list "lib-up" "↰" "lib-up") l))
          )
        (let ((html (mktable l 'music-library library-formatter)))
          (let ((handle (send el-library set-inner-html! html)))
            (hash-set! inner-html-handlers handle
                       (λ (oke)
                         (when oke
                           (send this bind 'dblclick "td.library-entry")
                           (send this bind 'click "td.library-entry")
                           (send this bind 'contextmenu "td.library-entry")
                           (for-each (λ (row)
                                       (let ((path-id (string->symbol (caddr row))))
                                         (let ((el (send this new-element path-id)))
                                           (send el connect 'dblclick
                                                 (λ (args)
                                                   (send this path-choosen (cadr row))))
                                           (send el connect 'click
                                                 (λ (args)
                                                   (displayln args)))
                                           (send el connect 'contextmenu
                                                 (λ (evt)
                                                   (send this context-for-path evt (cadr row))))
                                           )))
                                     l)
                           ))))
          ))
      )

    (define/override (inner-html-set handle oke)
      (ww-debug "inner-html-set called")
      (let ((cb (hash-ref inner-html-handlers handle #f)))
        (ww-debug (format "got cb = ~a for handle ~a" cb handle))
        (when cb
          (hash-remove! inner-html-handlers handle)
          (cb oke)))
      )

    (define/public (path-choosen path)
      (let ((path-part (if (equal? path "↰") ".." (format "~a" path))))
        (let ((npath (if (string=? path-part "..")
                         (build-path current-music-path path-part)
                         path)))
          (when (directory-exists? npath)
            (set! current-music-path (normalize-path npath))
            (send this update-library)
            )
          )
        )
      )

    (define/public (context-for-path evt path)
      (let* ((mnu (menu 'library-popup
                   (menu-item 'm-play-this (tr "Play this") #:callback (λ () (send this play-path path)))
                   (menu-item 'm-booklet (tr "Open booklet") #:callback (λ () (send this open-booklet path)))
                   (menu-item 'm-folder  (tr "Open containing folder") #:callback (λ () (send this open-folder path))
                              #:submenu
                              (menu (menu-item 'm-idx (tr "Select Music Library Folder") #:separator #t)
                                    (menu-item 'm-idy (tr "Quit") #:separator #t
                                               #:submenu
                                               (menu (menu-item 'mabd (tr "Ja"))
                                                     (menu-item 'mdedjk (tr "No"))
                                                     (menu-item 'sdakjfas (tr "akjfhalk"))
                                                     ))
                                      ))
                   )
                  )
             (js-evt (hash-ref evt 'js_evt (make-hash)))
             (clientX (hash-ref js-evt 'clientX 60))
             (clientY (hash-ref js-evt 'clientY 60))
            )
        (send this popup-menu mnu clientX clientY)
        )
      )

    (define/public (play-path path)
      (displayln (format "Playing ~a" path)))

    (define/public (open-booklet path)
      (displayln (format "Open booklet ~a" path)))

    (define/public (open-folder path)
      (displayln (format "open folder ~a" path)))

    (define/public (play)
      (displayln "Play button clicked")
      )

    (define/public (next-track)
      (displayln "Next track")
      )

    (define/public (previous-track)
      (displayln "Previous track")
      )

    (define/public (repeat)
      (displayln "Repeat")
      )

    (define/public (volume)
      (displayln "Volume")
      )

    (define/public (seek-to percentage)
      (displayln (format "Seeking to percentage: ~a" percentage))
      )

    (define/public (quit)
      (displayln (format "Quitting"))
      (send this close))

    (define/public (select-library)
      (let ((handle (send this choose-dir
                       (tr "Choose the folder containing your music library")
                       (format "~a" music-library))))
        (displayln (format "Selecting Music Library with handle: ~a" handle))
        )
      )

    (define/override (dir-choosen handle choosen dir)
      (when choosen
        (set! music-library dir)
        (send settings set! 'music-library dir)
        (set! current-music-path #f)
        (send this update-library)))
        

    (begin
      (let ((lang (send settings get 'lang 'en)))
        (displayln (format "RktPlayer started, current language: ~a" lang)))
      )
    )
  )