local cyclefocus = require('cyclefocus')

awful.key({ modkey,           }, "Tab",
    function ()
        awful.client.focus.history.previous()
        if client.focus then
            client.focus:raise()
        end
    end),

-- modkey+Tab: cycle through all clients.
awful.key({ modkey }, "Tab", function(c)
    cyclefocus.cycle({modifier="Super_L"})
end),
-- modkey+Shift+Tab: backwards
awful.key({ modkey, "Shift" }, "Tab", function(c)
    cyclefocus.cycle({modifier="Super_L"})
end),

-- Alt-Tab: cycle through clients on the same screen.
-- This must be a clientkeys mapping to have source_c available in the callback.
cyclefocus.key({ "Mod1", }, "Tab", {
    -- cycle_filters as a function callback:
    -- cycle_filters = { function (c, source_c) return c.screen == source_c.screen end },

    -- cycle_filters from the default filters:
    cycle_filters = { cyclefocus.filters.same_screen, cyclefocus.filters.common_tag },
    keys = {'Tab', 'ISO_Left_Tab'}  -- default, could be left out
}),

-- A set of default filters, which can be used for cyclefocus.cycle_filters.
cyclefocus.filters = {
    -- Filter clients on the same screen.
    same_screen = function (c, source_c) return c.screen == source_c.screen end,

    same_class = function (c, source_c)
        return c.class == source_c.class
    end,

    -- Only marked clients (via awful.client.mark and .unmark).
    marked = function (c, source_c)
        return awful.client.ismarked(c)
    end,

    common_tag  = function (c, source_c)
        for _, t in pairs(c:tags()) do
            for _, t2 in pairs(source_c:tags()) do
                if t == t2 then
                    cyclefocus.debug("Filter: client shares tag '" .. t.name .. " with " .. c.name)
                    return true
                end
            end
        end
        return false
    end
}

-- Alt-^: cycle through clients with the same class name.
cyclefocus.key({ "Mod1", }, "#49", 1, {
        cycle_filter = function (c, source_c) return c.class == source_c.class end,
        keys = { "°", "^" },  -- the keys to be handled, wouldn't be required if the keycode was available in keygrabber.
}),
cyclefocus.key({ "Mod1", "Shift", }, "#49", -1, {  -- keycode #49 => ^/° on german keyboard, upper left below Escape and next to 1.
        cycle_filter = function (c, source_c) return c.class == source_c.class end,
        keys = { "°", "^" },  -- the keys to be handled, wouldn't be required if the keycode was available in keygrabber.
}),

cyclefocus = {
    -- Should clients get shown during cycling?
    -- This should be a function (or `false` to disable showing clients), which
    -- receives a client object, and can make use of `cyclefocus.show_client`
    -- (the default implementation).
    show_clients = true,
    -- Should clients get focused during cycling?
    -- This is required for the tasklist to highlight the selected entry.
    focus_clients = true,
    -- Should the selected client get raised?
    -- This calls `cyclefocus.raise_client_without_focus` by default, which you
    -- can use when overriding this with a function (that gets the client as
    -- argument).
    raise_client = true,
    -- Should the mouse pointer be moved away during cycling?
    -- This is normally done to avoid interference from sloppy focus handling,
    -- but can be disabled if you do not use sloppy focus.
    move_mouse_pointer = true,

    -- How many entries should get displayed before and after the current one?
    display_next_count = 3,
    display_prev_count = 3,

    -- Default preset to use for entries.
    -- `preset_for_offset` (below) gets added to it.
    default_preset = {},

    --- Templates for entries in the list.
    -- The following arguments get passed to a callback:
    --  - client: the current client object.
    --  - idx: index number of current entry in clients list.
    --  - displayed_list: the list of entries in the list, possibly filtered.
    preset_for_offset = {
        -- Default callback, which will gets applied for all offsets (first).
        default = function (preset, args)
            -- Default font and icon size (gets overwritten for current/0 index).
            preset.font = 'sans 8'
            preset.icon_size = dpi(24)
            preset.text = escape_markup(cyclefocus.get_client_title(args.client, false))
        end,

        -- Preset for current entry.
        ["0"] = function (preset, args)
            preset.font = 'sans 14'
            preset.icon_size = dpi(36)
            preset.text = escape_markup(cyclefocus.get_client_title(args.client, true))
            -- Add screen number if there is more than one.
            if screen.count() > 1 then
                preset.text = preset.text .. " [screen " .. tostring(args.client.screen.index) .. "]"
            end
            preset.text = preset.text .. " [#" .. args.idx .. "] "
            preset.text = '<b>' .. preset.text .. '</b>'
        end,

        -- You can refer to entries by their offset.
        -- ["-1"] = function (preset, args)
        --     -- preset.icon_size = 32
        -- end,
        -- ["1"] = function (preset, args)
        --     -- preset.icon_size = 32
        -- end
    },

    -- Default builtin filters.
    -- (meant to get applied always, but you could override them)
    cycle_filters = {
        function(c, source_c) return not c.minimized end,  --luacheck: no unused args
    },

    -- Experimental: Width of icon column ("max_icon_size", used for margin).
    -- This could be "margin" etc instead, but currently only the width for the
    -- current entry is known.
    icon_col_width = dpi(36),

    -- EXPERIMENTAL: only add clients to the history that have been focused by
    -- cyclefocus.
    -- This allows to switch clients using other methods, but those are then
    -- not added to cyclefocus' internal history.
    -- The get_next_client function will then first consider the most recent
    -- entry in the history stack, if it's not focused currently.
    --
    -- You can use cyclefocus.history.add to manually add an entry, or
    -- cyclefocus.history.append if you want to add it to the end of the stack.
    -- This might be useful in a request::activate signal handler.
    -- only_add_internal_focus_changes_to_history = true,

    -- The filter to ignore clients altogether (get not added to the history stack).
    -- This is different from the cycle_filters.
    -- The function should return true / the client if it's ok, nil otherwise.
    filter_focus_history = awful.client.focus.filter,

    -- Display notifications while cycling?
    -- WARNING: without raise_clients this will not make sense probably!
    display_notifications = true,

    -- Debugging: messages get printed, and should show up in ~/.xsession-errors etc.
    -- 1: enable, 2: verbose, 3: very verbose, 4: much verbose.
    debug_level = 0,
    -- Use naughty notifications for debugging (additional to printing)?
    debug_use_naughty_notify = false,
}

cyclefocus = require("cyclefocus")
cyclefocus.debug_level = 2

cyclefocus.key({ modkey, }, "Tab", 1, {
    cycle_filters = { cyclefocus.filters.common_tag },
    display_notifications = false,
    modifier='Super_L', keys={'Tab', 'ISO_Left_Tab'}
}),
cyclefocus.key({ modkey, "Shift", }, "Tab", 1, {
    cycle_filters = { cyclefocus.filters.common_tag },
    display_notifications = false,
    modifier='Super_L', keys={'Tab', 'ISO_Left_Tab'}
}),