/* Copyright (C) 2013  Tom Willemsen <tom at ryuslash dot org>

   This file is part of CLark

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

   CLark 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
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with CLark. If not, see <http://www.gnu.org/licenses/>.
 */
/// Commentary:

// A wrapper script that should allow conkeror to interface with
// CLark.

/// Code:

define_variable("clark_program", "clark",
                "The location of the clark executable.");
define_variable("clark_bookmarked_string", "+",
                "Text to show if the current url has been bookmarked.");
define_variable("clark_not_bookmarked_string", "-",
                "Text to show it the current url has not been"
                + " bookmarked.");

function clark_url_completer () {
    keywords(arguments, $sort_order = "visitcount_descending");
    var use_webjumps = arguments.$use_webjumps;
    var use_history = arguments.$use_history;
    var use_bookmarks = arguments.$use_bookmarks;
    var sort_order = arguments.$sort_order;
    var completers = [];
    completers.push(file_path_completer());
    if (url_completion_use_webjumps)
        completers.push(webjump_completer());
    completers.push(clark_complete);
    if (url_completion_use_history)
        completers.push(history_completer($use_history = true,
                                          $sort_order = sort_order));
    return merge_completers(completers);
}

minibuffer_auto_complete_preferences["clark"] = true;
define_browser_object_class(
    "clark-bookmark", null,
    function (I, prompt) {
        check_buffer(I.buffer, content_buffer);
        var result = yield I.buffer.window.minibuffer.read(
            $prompt = prompt, $completer = clark_url_completer(),
            $history = "clark", $auto_complete = "clark"
        );
        yield co_return(result);
    }
);

// Add URL to clark, ask for a title (provide TITLE as a
// default), description and any number of tags.
function clark_add_url(I, url, title)
{   let url_string = load_spec_uri_string(load_spec(url));
    let title = yield I.minibuffer.read($prompt="name (required): ",
                                        $initial_value=title);
    let description = yield I.minibuffer.read(
        $prompt="extended description: "
    );
    let tags = yield I.minibuffer.read(
        $prompt="tags (comma delimited): "
    );
    let command = clark_program + ' add "' + url_string + '" "' + title
            + '" "' + description + '" \''
            + tags.split(',').map(function (str)
                                  { return str.trim(); }).join("' '")
            + "'";
    let result = yield clark_shell_command(command);

    yield co_return(result);
}

function clark_add(I) {
    check_buffer(I.buffer, content_buffer);
    let result = yield clark_add_url(I, I.buffer.top_frame,
                                        I.buffer.title);

    if (result === "")
        I.window.minibuffer.message('Added to clark');
    else
        I.window.minibuffer.message('Couldn\'t add to clark');
}
interactive("clark-add",
            "Bookmark the current page in clark",
            clark_add);

function clark_add_link(I) {
    check_buffer(I.buffer, content_buffer);
    var bo = yield read_browser_object(I);
    let result = yield clark_add_url(I, encodeURIComponent(bo),
                                        bo.textContent);

    if (result === "")
        I.window.minibuffer.message('Added to clark');
    else
        I.window.minibuffer.message('Couldn\'t add to clark');
}
interactive("clark-add-link",
            "Select and bookmark a link in clark",
            clark_add_link);

function clark_bookmarked_widget(window) {
    this.class_name = "clark-bookmark-widget";
    text_widget.call(this, window);
    this.add_hook("current_content_buffer_location_change_hook");
    this.add_hook("select_buffer_hook");
}
clark_bookmarked_widget.prototype = {
    constructor: clark_bookmarked_widget,
    __proto__: text_widget.prototype,
    update: function () {
        var obj = this;
        function doit () {
            var result = yield clark_exists_p(
                obj.window.buffers.current.description
            );
            obj.view.text = result == "yes"
                ? clark_bookmarked_string
                : clark_not_bookmarked_string;
        }
        co_call(doit());
    }
};

function clark_complete(input, pos, conservative)
{
    if (pos == 0 && conservative)
        yield co_return(undefined);

    let str = input.substring(0, pos);

    var data = "", error = "", ret = [];
    var result = 0;

    if (str == "")
        result = yield shell_command(
            clark_program + " --script",
            $fds = [{ output: async_binary_string_writer("") },
                    { input: async_binary_reader(
                        function (s) data += s || "") },
                    { input: async_binary_reader(
                        function (s) error += s || "") }]);
    else
        result = yield shell_command_with_argument(
            clark_program + " --script search {}", str,
            $fds = [{ output: async_binary_string_writer("") },
                    { input: async_binary_reader(
                        function (s) data += s || "") },
                    { input: async_binary_reader(
                        function (s) error += s || "") }]);

    if (result != 0 || error != "")
        throw new Error("result: " + result + ", error: " + error);
    else if (data != "") {
        data.split('').forEach(function (row) {
            ret.push(row.split(''));
        });

        let c = { count: ret.length,
                  get_string: function (i) ret[i][1],
                  get_description: function (i) ret[i][2],
                  get_input_state: function (i) [ret[i][0]] };
        yield co_return(c);
    }
}

interactive("clark-find-url",
            "Find a page from clark in the current buffer",
            "find-url",
            $browser_object = browser_object_clark_bookmark);
interactive("clark-find-url-new-buffer",
            "Find a page from clark in a new buffer",
            "find-url-new-buffer",
            $browser_object = browser_object_clark_bookmark);

function clark_edit(I) {
    check_buffer(I.buffer, content_buffer);

    let url_string =
            load_spec_uri_string(load_spec(I.buffer.top_frame));
    let title = yield I.minibuffer.read(
        $prompt="name (leave empty to skip): ",
        $initial_value=I.buffer.title
    );
    let description = yield I.minibuffer.read(
        $prompt="description (leave empty to skip): "
    );
    let command = clark_program + ' edit "' + url_string + '" ';

    if (title == "" && description == "")
        I.window.minibuffer.message('Nothing to change');
    else {
        if (title != "")
            command += "--name '" + title + "' ";
        if (description != "")
            command += "--description '" + description + "' ";

        var result = yield clark_shell_command(command);

        if (result === "")
            I.window.minibuffer.message("CLark done");
        else
            I.window.minibuffer.message("Error during CLark operation.");
    }
}
interactive("clark-edit", "Edit information for the current URL.",
            clark_edit);

function clark_exists_p(url) {
    let command = clark_program + ' exists "' + url + '"';
    var data = "", error = "";

    var result = yield shell_command(
        command,
        $fds = [{ output: async_binary_string_writer("") },
                { input: async_binary_reader(
                    function (s) data += s || "") },
                { input: async_binary_reader(
                    function (s) error += s || "") }]
    );

    if (error != "")
        throw new Error("Error occurred with CLark: " + error);

    yield co_return(data.trim());
}

interactive("clark-exists-p", "Check to see if the current url"
            + " exists in the database.",
            function (I) {
                check_buffer(I.buffer, content_buffer);
                let data = yield clark_exists_p(
                    load_spec_uri_string(load_spec(I.buffer.top_frame))
                );
                I.window.minibuffer.message(data);
            });

function clark_remove(I) {
    check_buffer(I.buffer, content_buffer);

    let url_string =
            load_spec_uri_string(load_spec(I.buffer.top_frame));
    let command = clark_program + ' remove "' + url_string + '"';
    let result = yield clark_shell_command(command);

    if (result === "")
        I.window.minibuffer.message("CLark done");
    else
        I.window.minibuffer.message("Error during CLark operation.");
}
interactive("clark-remove", "Remove the bookmark of the current URL"
            + " from the database.", clark_remove);

function clark_set_tags(I) {
    check_buffer(I.buffer, content_buffer);

    let url_string =
            load_spec_uri_string(load_spec(I.buffer.top_frame));
    let tags = yield I.minibuffer.read(
        $prompt="tags (comma delimited): "
    );
    let command = clark_program + ' set-tags "' + url_string + '" '
            + tags.split(',').map(
                function (str) { return "'" + str.trim() + "'"; }
            ).join(" ");
    let result = yield clark_shell_command(command);

    if (result === "")
        I.window.minibuffer.message("CLark done");
    else
        I.window.minibuffer.message("Error during CLark operation.");
}
interactive("clark-set-tags", "Replace the tags for the bookmark of"
            + " the current URL.", clark_set_tags);

function clark_random(I)
{
    check_buffer(I.buffer, content_buffer);

    let tag = yield I.minibuffer.read($prompt="tag: ");
    let command = clark_program + ' random';
    if (tag != "")
        command += ' ' + tag;

    let result = yield clark_shell_command(command);

    if (result)
        I.buffer.load(result);
}
interactive("clark-random", "Open a random bookmark", clark_random);

function clark_shell_command(command)
{
    let data = "", error = "";
    let res = yield shell_command(
        command,
        $fds = [{ output: async_binary_string_writer("") },
                { input: async_binary_reader(
                    function (s) data += s || ""
                )},
                { input: async_binary_reader(
                    function (s) error += s || ""
                )}]
    );

    yield co_return(res == 0 && error == "" && data);
}

define_keymap("clark_keymap");

define_key(clark_keymap, "#", "clark-random");
define_key(clark_keymap, "?", "clark-exists-p");
define_key(clark_keymap, "a", "clark-add");
define_key(clark_keymap, "A", "clark-add-link");
define_key(clark_keymap, "e", "clark-edit");
define_key(clark_keymap, "f", "clark-find-url");
define_key(clark_keymap, "F", "clark-find-url-new-buffer");
define_key(clark_keymap, "r", "clark-remove");
define_key(clark_keymap, "t", "clark-set-tags");

provide("clark");