;;; iarc.el -- internet archive client -*- lexical-binding: t -*-

;; Copyright (C) 2025  Free Software Foundation, Inc.

;; Author: Yuchen Pei <id@ypei.org>
;; Package-Requires: ((emacs "30.1"))

;; This file is part of dotted.

;; dotted is free software: you can redistribute it and/or modify it under
;; the terms of the GNU Affero General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; dotted is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General
;; Public License for more details.

;; You should have received a copy of the GNU Affero General Public
;; License along with dotted.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; internet archive client.

;;; Code:

(require 'infobox)

(defvar-keymap iarc-mode-map
  :parent tabulated-list-mode-map
  "F" #'iarc-toggle-follow-mode
  "i" #'iarc-infobox
  "n" #'iarc-next-line
  "p" #'iarc-previous-line
  "RET" #'iarc-item-at-point
  )

(define-derived-mode iarc-mode tabulated-list-mode "IArc"
  (hl-line-mode 1)
  (setq tabulated-list-format
        [("★ " 3 iarc-compare-favourites :right-align t)
         ("Title" 60 t)])
  (setq tabulated-list-padding 2)
  (tabulated-list-init-header)
  (setq revert-buffer-function #'iarc-list-refresh))

(defvar iarc-search-dataset nil)

(defvar iarc-follow-mode nil "Whether follow mode is on.")

(defun iarc-toggle-follow-mode ()
  (interactive)
  (setq iarc-follow-mode (not iarc-follow-mode)))

(defun iarc-previous-line ()
  (interactive)
  (previous-line)
  (when iarc-follow-mode
    (iarc-infobox)))

(defun iarc-next-line ()
  (interactive)
  (next-line)
  (when iarc-follow-mode
    (iarc-infobox)))

(defun iarc-compare-favourites (x y)
  (> (let-alist (car x) (or .fields.num_favorites 0))
     (let-alist (car y) (or .fields.num_favorites 0))))

(defun iarc-list-print-entry (info)
  (let-alist (alist-get 'fields info)
    (list info (vector (format "%d" (or .num_favorites 0))
                       .title))))

(defun iarc-list-refresh (&rest _)
  (interactive)
  (setq tabulated-list-entries
        (seq-map 'iarc-list-print-entry iarc-search-dataset))
  (tabulated-list-print))

(defun iarc ()
  (let ((buf (get-buffer-create "*IArc*")))
    (with-current-buffer buf
      (iarc-mode)
      (iarc-list-refresh))
    (pop-to-buffer-same-window buf)))

(defvar iarc-host "https://archive.org")

(defun iarc-api-search (query)
  (my-url-fetch-json
   (format "%s/services/search/beta/page_production/?user_query=title:(%s)&hits_per_page=100&page=1&aggregations=false"
           iarc-host query)))

(defun iarc-search (query)
  (interactive "sIArc Query: ")
  (setq iarc-search-dataset (let-alist (iarc-api-search query)
                              .response.body.hits.hits))
  (iarc))

(defun iarc-infobox ()
  (interactive)
  (let ((help-window-select (not iarc-follow-mode)))
    (iarc-render-info (alist-get 'fields (tabulated-list-get-id)))))

(defun iarc-render-info (info)
  (infobox-render
   (infobox-translate info (infobox-default-specs info))
   `(iarc-render-infobox ,info)
   (called-interactively-p 'interactive)))

(defun iarc-item-at-point ()
  (interactive)
  (iarc-item (alist-get 'identifier (alist-get 'fields
                                               (tabulated-list-get-id)))))

(define-derived-mode iarc-item-mode tabulated-list-mode "IArc Item"
  (hl-line-mode 1)
  (setq revert-buffer-function #'iarc-list-refresh))

(defvar-local iarc-item-id nil "The item identifier for the iarc-item mode")
(defvar-local iarc-item-data nil "The content of the iarc-item mode")

(defun iarc-item (id)
  "List content of item with ID"
  (let* ((buf (get-buffer-create (format "*IArc %s*" id)))
         (out
          (seq-map
           (lambda (s) (split-string s "\t"))
           (string-lines
            (with-temp-buffer
              (call-process "ia" nil t nil "ls" "-v" "-c" "name,mtime,size" id)
              (buffer-string))))))
    (with-current-buffer buf
      (setq tabulated-list-format
            (vconcat
             (seq-map
              (lambda (c) (list c 20))
              (car out))))
      (setq tabulated-list-padding 2)
      (iarc-item-mode)
      (tabulated-list-init-header)
      (setq iarc-item-data (cdr out))
      (iarc-item-list-refresh))
    (pop-to-buffer-same-window buf)))

(defun iarc-item-list-refresh ()
  (setq tabulated-list-entries
        (seq-map 'iarc-item-list-print-entry iarc-item-data))
  (tabulated-list-print))

(defun iarc-item-list-print-entry (info)
  (list info (vconcat info)))

(provide 'iarc)
;;; iarc.el ends here