#lang racket/base

(require racket/class racket/date racket/list racket/match
         "fs.rkt"
         "framework.rkt")

(module+ test
  (require rackunit))


(define (timestamp->string ts)
  (date->string (seconds->date ts #t) #t))

(define meowbb-post-view%
  (class activity%
    (init-field posts)
    (init-field modtimes)
    (init-field path)

    (define post (first (hash-ref (hash-ref* posts path) *post-index*)))

    (define root
      (new header/footer%
           [header (new label% [label-text (format "meowbb : ~a"
                                                   (cons (post-forum post) (post-path post)))])]
           [body (new scroll-pane%
                      [body (new text-pane% [content (post-content post)])])]
           [footer (new label% [label-text "[JK] scroll | [Q] back"])]))

    (super-new [root root])

    (define/override (on-event e)
      (match e
        ["q" 'quit]
        [_ 'continue]))))

(define meowbb-post-list%
  (class activity%
    (init-field posts)
    (init-field modtimes)
    (init-field forum)

    (define sorted (sorted-level posts modtimes (list forum)))

    (define entries
      (for/list ([posts-in (in-list sorted)])
        (define post (first (hash-ref posts-in *post-index*)))
        (define modtime (hash-ref modtimes (cons (post-forum post) (post-path post))))
        (list (last (post-path post)) (post-author post)
              (timestamp->string modtime))))

    (define root
      (new header/footer%
           [header (new label% [label-text (format "meowbb : ~a" forum)])]
           [body (new scroll-pane%
                      [body (new table%
                                 [headers '("title" "author" "updated")]
                                 [cells entries])])]
           [footer (new label% [label-text "[JK] navigate | [ENTER] select | [Q] back"])]))

    (super-new [root root])

    (define/override (on-event e)
      (match e
        ["q" 'quit]
        [(app-event _ 'selection row)
         (define post (first (hash-ref (list-ref sorted row) *post-index*)))
         (new meowbb-post-view% [posts posts] [modtimes modtimes]
              [path (cons forum (post-path post))])]
        [_ 'continue]))))

(define meowbb-forum-list%
  (class activity%
    (init-field posts)
    (init-field modtimes)

    (define forums (sort (hash-keys posts) string<?))
    (define entries
      (for/list ([forum (in-list forums)])
        (list forum (timestamp->string (hash-ref modtimes (list forum))))))

    (define root
      (new header/footer%
           [header (new label% [label-text "meowbb : forums"])]
           [body (new scroll-pane%
                   [body (new table%
                              [headers '("forum" "updated")]
                              [cells entries])])]
           [footer (new label% [label-text "[JK] navigate | [ENTER] select | [Q] quit"])]))

    (super-new [root root])

    (define/override (on-event e)
      (match e
        ["q" 'quit]
        [(app-event _ 'selection row)
         (define forum (list-ref forums row))
         (new meowbb-post-list% [posts posts] [modtimes modtimes] [forum forum])]
        [_ 'continue]))

    (define/override (on-deactivated)
      "bye meow ~")))

(define (tui-main)
  ;; gang
  (date-display-format 'iso-8601)

  (displayln "fetching users")
  (define users (list-users))
  (displayln "fetching posts")
  (define posts (get-posts users))
  (displayln "calculting modtimes")
  (define modtimes (make-hash))
  (void (dfs-modtime posts '() modtimes))

  (run-application "meowbb" (new meowbb-forum-list% [posts posts] [modtimes modtimes])))


(module+ test
  ;; tests lol
  (check-equal? (+ 2 2) 4))


(module+ main
  (require racket/cmdline)
  (command-line
    #:program "meowbb"
    #:args ()
    (tui-main)))