--
-- Author  : Dennis Eriksen <d@ennis.no>
-- File    : @wezterm.lua
-- Created : 2024-08-13
--
-- Based on template from https://alexplescan.com/posts/2024/08/10/wezterm/


-- Import the wezterm module
local wezterm = require 'wezterm'
-- Creates a config object which we will be adding our config to
local config = wezterm.config_builder()

--config.term = 'wezterm'

-- Recognize OS
local is_linux = wezterm.target_triple:find("linux") ~= nil
local is_darwin = wezterm.target_triple:find("darwin") ~= nil

-- From https://stackoverflow.com/a/326715
function os.capture(cmd, raw)
  local f = assert(io.popen(cmd, 'r'))
  local s = assert(f:read('*a'))
  f:close()
  if raw then return s end
  s = string.gsub(s, '^%s+', '')
  s = string.gsub(s, '%s+$', '')
  s = string.gsub(s, '[\n\r]+', ' ')
  return s
end


-- Env
config.set_environment_variables = {
  PATH = os.capture("zsh -c 'echo -n $PATH'"),
}


-- Shell
-- use login(1) to make sure we set the right logname.
-- Workaround for https://github.com/wez/wezterm/issues/6196
if is_darwin then
  local USER = os.getenv("USER")
  local SHELL = os.getenv("SHELL")
  config.default_prog = { '/usr/bin/login', '-fpq', USER, SHELL, '-li' }
end



-- Theme
------------------------------------------------------------
--config.color_scheme = 'Gruvbox dark, hard (base16)'


config.colors = {

  -- Most of these, if not all, are stolen from Kitty
  foreground = '#dddddd',
  background = '#000000',

  ansi = {
    '#000000', -- color0, 'black',
    '#cc0403', -- color1, 'red',
    '#19cb00', -- color2, 'green',
    '#cecb00', -- color3, 'yellow',
    '#0d73cc', -- color4, 'blue',
    '#cb1ed1', -- color5, 'magenta',
    '#0dcdcd', -- color6, 'cyan',
    '#dddddd', -- color7, 'white',
  },
  brights = {
    '#767676', -- color8, 'grey',
    '#f2201f', -- color9, 'red',
    '#23fd00', -- color10, 'lime',
    '#fffd00', -- color11, 'yellow',
    '#1a8fff', -- color12, 'blue',
    '#fd28ff', -- color13, 'fuchsia',
    '#14ffff', -- color14, 'aqua',
    '#ffffff', -- color15, 'white',
  },


  tab_bar = {
    -- The color of the strip that goes along the top of the window
    -- (does not apply when fancy tab bar is in use)
    background = 'black',

    -- The active tab is the one that has focus in the window
    active_tab = {

      -- The color of the background area for the tab
      bg_color = '#3c3c3c',
      -- The color of the text for the tab
      fg_color = '#d5d5d5',

      -- Specify whether you want "Half", "Normal" or "Bold" intensity for the
      -- label shown for this tab.
      -- The default is "Normal"
      intensity = 'Bold',

      -- Specify whether you want "None", "Single" or "Double" underline for
      -- label shown for this tab.
      -- The default is "None"
      --underline = 'None',

      -- Specify whether you want the text to be italic (true) or not (false)
      -- for this tab.  The default is false.
      --italic = false,

      -- Specify whether you want the text to be rendered with strikethrough (true)
      -- or not for this tab.  The default is false.
      --strikethrough = false,
    },

    -- Inactive tabs are the tabs that do not have focus
    inactive_tab = {
      bg_color = '#202020',
      fg_color = '#a0a0a0',

      -- The same options that were listed under the `active_tab` section above
      -- can also be used for `inactive_tab`.
    },

    -- You can configure some alternate styling when the mouse pointer
    -- moves over inactive tabs
    inactive_tab_hover = {
      bg_color = '#7c7c7c',
      fg_color = '#f9f9f9',

      -- The same options that were listed under the `active_tab` section above
      -- can also be used for `inactive_tab_hover`.
    },

    -- The new tab button that let you create new tabs
    new_tab = {
      bg_color = '#202020',
      fg_color = '#a0a0a0',

      -- The same options that were listed under the `active_tab` section above
      -- can also be used for `new_tab`.
    },

     -- You can configure some alternate styling when the mouse pointer
     -- moves over the new tab button
    new_tab_hover = {
      bg_color = '#7c7c7c',
      fg_color = '#f9f9f9',

      -- The same options that were listed under the `active_tab` section above
      -- can also be used for `new_tab_hover`.
    },
  },

}



-- Font
------------------------------------------------------------

-- Installing fonts:
--   - Debian: apt install fonts-ubuntu fonts-noto
--   - macOS: brew install font-ubuntu-mono font-noto-mono font-noto-color-emoji font-ubuntu-mono-nerd-font
--   - OpenBSD: pkg_add -i ubuntu-fonts noto-fonts ubuntu-nerd-fonts noto-nerd-fonts

config.font = wezterm.font_with_fallback({
  -- ~/Library/Fonts/UbuntuMono-Regular.ttf, CoreText
  "Ubuntu Mono",

  -- Might have more utf-8
  "Noto Mono",

  -- Fallbacks automagically added by wezterm:
    -- -- <built-in>, BuiltIn
    -- "JetBrains Mono",

    -- -- <built-in>, BuiltIn
    -- -- Assumed to have Emoji Presentation
    -- "Noto Color Emoji",

    -- -- <built-in>, BuiltIn
    -- "Symbols Nerd Font Mono",
})

-- And a font size that won't have you squinting
config.font_size = 18

-- Custom font size on character select menu
config.char_select_font_size = 30



-- Keys
------------------------------------------------------------

-- The default behavior is to treat the left Option key as the Alt modifier
-- with no composition effects, while the right Option key performs composition
-- (making it approximately equivalent to AltGr on other operating systems).
config.send_composed_key_when_left_alt_is_pressed = true
config.send_composed_key_when_right_alt_is_pressed = true


config.keys = {
  -- Select next/prev tab with CMD+arrows
  { key = 'LeftArrow', mods = 'CMD', action = wezterm.action.ActivateTabRelative(-1) },
  { key = 'RightArrow', mods = 'CMD', action = wezterm.action.ActivateTabRelative(1) },

  {
    key = ',',
    mods = 'CMD',
    action = wezterm.action.SpawnCommandInNewTab {
      cwd = wezterm.home_dir,
      args = { os.capture("zsh -lc 'echo -n $EDITOR'"), wezterm.config_file },
    },
  },
}



-- Mouse / Selection / Hyperlinks
------------------------------------------------------------

-- https://wezfurlong.org/wezterm/config/lua/config/selection_word_boundary.html
-- Configures the boundaries of a word, thus what is selected when doing a word
-- selection with the mouse.
-- Default: " \t\n{}[]()\"'`"
config.selection_word_boundary = " \t\n{}[]()\"'`|│"


-- Hyperlink rules
-- Seems there is a bug in Wezterm where urls in parenthesis aren't clickable.
-- https://github.com/wez/wezterm/issues/3803
--
-- Fix from https://github.com/wez/wezterm/issues/3803#issuecomment-2379791340
config.hyperlink_rules = {
  -- Matches: a URL in parens: (URL)
  -- Markdown: [text](URL title)
  {
    regex = '\\((\\w+://\\S+?)(?:\\s+.+)?\\)',
    format = '$1',
    highlight = 1,
  },
  -- Matches: a URL in brackets: [URL]
  {
    regex = '\\[(\\w+://\\S+?)\\]',
    format = '$1',
    highlight = 1,
  },
  -- Matches: a URL in curly braces: {URL}
  {
    regex = '\\{(\\w+://\\S+?)\\}',
    format = '$1',
    highlight = 1,
  },
  -- Matches: a URL in angle brackets: <URL>
  {
    regex = '<(\\w+://\\S+?)>',
    format = '$1',
    highlight = 1,
  },
  -- Then handle URLs not wrapped in brackets
  -- regex = '\\b\\w+://\\S+[)/a-zA-Z0-9-]+',
  {
    regex = '(?<![\\(\\{\\[<])\\b\\w+://\\S+',
    format = '$0',
  },
  -- implicit mailto link
  {
    regex = '\\b\\w+@[\\w-]+(\\.[\\w-]+)+\\b',
    format = 'mailto:$0',
  },
}



-- Window appearence
------------------------------------------------------------

-- Removes the title bar, leaving only the tab bar. Keeps
-- the ability to resize by dragging the window's edges.
-- On macOS, 'RESIZE|INTEGRATED_BUTTONS' also looks nice if
-- you want to keep the window controls visible and integrate
-- them into the tab bar.
config.window_decorations = 'RESIZE'

-- When tab_bar_at_bottom = true, the tab bar will be rendered at the bottom of the window rather than the top of the window.
config.tab_bar_at_bottom = true

--Specifies whether the ToggleFullScreen key assignment uses the native macOS
--full-screen application support or not.
--
--The default is false which will simply (and very quickly!) toggle between a
--window that covers the full screen, with no decorations and a regularly sized
--window.
--
--When true, transitioning to full screen will use the macOS native full screen
--mode, which in more recent versions of macOS, will allocate a separate Space
--for the wezterm application and then slowly animate the wezterm window moving
--into to that full screen Space on the monitor.
--
--This option only has an effect when running on macOS.
config.native_macos_fullscreen_mode = true

-- When pane_focus_follows_mouse = true, moving the mouse pointer over an
-- inactive pane will cause that pane to activate; this behavior is known as
-- "focus follows mouse".
--
--When pane_focus_follows_mouse = false (the default), you need to click on an
--inactive pane to activate it.
config.pane_focus_follows_mouse = true


-- When set to true (the default), the tab bar is rendered in a native style with proportional fonts.
-- When set to false, the tab bar is rendered using a retro aesthetic using the main terminal font.
config.use_fancy_tab_bar = false

-- If set to true, when there is only a single tab, the tab bar is hidden from the display. If a second tab is created, the tab will be shown.
config.hide_tab_bar_if_only_one_tab = true

-- If true, show_tab_index_in_tab_bar uses a zero-based index. The default is false and the tab shows a one-based index.
config.tab_and_split_indices_are_zero_based = true

-- Sets the font for the window frame (tab bar)
config.window_frame = {
  --font = wezterm.font({ family = 'Berkeley Mono', weight = 'Bold' }),
  --font_size = 11,
  --active_titlebar_bg = '#333399',
  --inactive_titlebar_bg = '#ffffff',

  border_left_width = '0',
  border_right_width = '0',
  border_bottom_height = '0',
  border_top_height = '0',
}

config.enable_scroll_bar = false
config.window_padding = {
  left = 0,
  right = 0,
  top = 0,
  bottom = 0,
}


-- This function returns the suggested title for a tab.
-- It prefers the title that was set via `tab:set_title()`
-- or `wezterm cli set-tab-title`, but falls back to the
-- title of the active pane in that tab.
local function tab_title(tab_info)
  local title = tab_info.tab_title
  -- if the tab title is explicitly set, take that
  if #title == 0 then
    title = tab_info.active_pane.title
  end
  -- Otherwise, use the title from the active pane
  -- in that tab
  return tab_info.tab_index .. ' ' .. title
end

-- https://wezfurlong.org/wezterm/config/lua/window-events/format-tab-title.html
wezterm.on(
  'format-tab-title',
  function(tab, tabs, panes, config, hover, max_width)
    local c = config.colors.tab_bar
    local tabc

    if tab.is_active then
      tabc = c.active_tab
    elseif hover then
      tabc = c.inactive_tab_hover
    else
      tabc = c.inactive_tab
    end

    local edge = {
      bg_color = c.background,
      fg_color = tabc.bg_color
    }

    local title = tab_title(tab)

    -- ensure that the titles fit in the available space,
    -- and that we have room for the edges.
    title = wezterm.truncate_right(title, max_width - 2)

    return {
      { Background = { Color = edge.bg_color } },
      { Foreground = { Color = edge.fg_color } },
      { Text = '░▒▓' },
      { Background = { Color = tabc.bg_color } },
      { Foreground = { Color = tabc.fg_color } },
      { Text = title },
      { Background = { Color = edge.bg_color } },
      { Foreground = { Color = edge.fg_color } },
      { Text = '▓▒░' },
    }
  end
)

return config