.wezterm.lua

-- vim: tabstop=2 shiftwidth=2 expandtab

local wezterm = require 'wezterm'
local config = wezterm.config_builder()
local appearance = require 'appearance'
local projects = require 'projects'

config.set_environment_variables = {
  PATH = '/opt/homebrew/bin:' .. os.getenv('PATH')
}

if appearance.is_dark() then
  config.color_scheme = 'Solarized Dark (Gogh)'
else
  config.color_scheme = 'Solarized Light (Gogh)'
end

-- Slightly transparent and blurred background
config.window_background_opacity = 0.9
config.macos_window_background_blur = 30
-- 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'
config.font = wezterm.font 'Berkeley Mono'
config.font_size = 16
-- Sets the font for the window frame (tab bar)
config.window_frame = {
  -- Berkeley Mono for me again, though an idea could be to try a
  -- serif font here instead of monospace for a nicer look?
  font = wezterm.font({ family = 'Berkeley Mono'}),
  font_size = 12,
}

config.default_cursor_style = 'BlinkingBlock'


local function segments_for_right_status(window)
  return {
    window:active_workspace(),
    wezterm.strftime('%a %b %-d %H:%M'),
    wezterm.hostname(),
  }
end

wezterm.on('update-status', function(window, _)
  local SOLID_LEFT_ARROW = utf8.char(0xe0b2)
  local segments = segments_for_right_status(window)

  local color_scheme = window:effective_config().resolved_palette
  -- Note the use of wezterm.color.parse here, this returns
  -- a Color object, which comes with functionality for lightening
  -- or darkening the colour (amongst other things).
  local bg = wezterm.color.parse(color_scheme.background)
  local fg = color_scheme.foreground

  -- Each powerline segment is going to be coloured progressively
  -- darker/lighter depending on whether we're on a dark/light colour
  -- scheme. Let's establish the "from" and "to" bounds of our gradient.
  local gradient_to, gradient_from = bg
  if appearance.is_dark() then
    gradient_from = gradient_to:lighten(0.2)
  else
    gradient_from = gradient_to:darken(0.2)
  end

  -- Yes, WezTerm supports creating gradients, because why not?! Although
  -- they'd usually be used for setting high fidelity gradients on your terminal's
  -- background, we'll use them here to give us a sample of the powerline segment
  -- colours we need.
  local gradient = wezterm.color.gradient(
    {
      orientation = 'Horizontal',
      colors = { gradient_from, gradient_to },
    },
    #segments -- only gives us as many colours as we have segments.
  )

  -- We'll build up the elements to send to wezterm.format in this table.
  local elements = {}

  for i, seg in ipairs(segments) do
    local is_first = i == 1

    if is_first then
      table.insert(elements, { Background = { Color = 'none' } })
    end
    table.insert(elements, { Foreground = { Color = gradient[i] } })
    table.insert(elements, { Text = SOLID_LEFT_ARROW })

    table.insert(elements, { Foreground = { Color = fg } })
    table.insert(elements, { Background = { Color = gradient[i] } })
    table.insert(elements, { Text = ' ' .. seg .. ' ' })
  end

  window:set_right_status(wezterm.format(elements))
end)

local function move_pane(key, direction)
  return {
    key = key,
    mods = 'CTRL',
    action = wezterm.action.ActivatePaneDirection(direction),
  }
end

local function resize_pane(key, direction)
  return {
    key = key,
    action = wezterm.action.AdjustPaneSize { direction, 3 }
  }
end

-- If you're using emacs you probably wanna choose a different leader here,
-- since we're gonna be making it a bit harder to CTRL + A for jumping to
-- the start of a line
config.leader = { key = 's', mods = 'CTRL', timeout_milliseconds = 1000 }

-- Table mapping keypresses to actions
config.keys = {
  -- Sends ESC + b and ESC + f sequence, which is used
  -- for telling your shell to jump back/forward.
  {
    -- When the left arrow is pressed
    key = 'LeftArrow',
    -- With the "Option" key modifier held down
    mods = 'OPT',
    -- Perform this action, in this case - sending ESC + B
    -- to the terminal
    action = wezterm.action.SendString '\x1bb',
  },
  {
    key = 'RightArrow',
    mods = 'OPT',
    action = wezterm.action.SendString '\x1bf',
  },

  {
    key = ',',
    mods = 'SUPER',
    action = wezterm.action.SpawnCommandInNewTab {
      cwd = wezterm.home_dir,
      args = { 'nvim', wezterm.config_file },
    },
  },

  {
    -- I'm used to tmux bindings, so am using the quotes (") key to
    -- split horizontally, and the percent (%) key to split vertically.
    key = '\\',
    -- Note that instead of a key modifier mapped to a key on your keyboard
    -- like CTRL or ALT, we can use the LEADER modifier instead.
    -- This means that this binding will be invoked when you press the leader
    -- (CTRL + A), quickly followed by quotes (").
    mods = 'LEADER',
    action = wezterm.action.SplitHorizontal { domain = 'CurrentPaneDomain' },
  },
  {
    key = '-',
    mods = 'LEADER',
    action = wezterm.action.SplitVertical { domain = 'CurrentPaneDomain' },
  },

  {
    key = 'a',
    -- When we're in leader mode _and_ CTRL + A is pressed...
    mods = 'LEADER|CTRL',
    -- Actually send CTRL + A key to the terminal
    action = wezterm.action.SendKey { key = 'a', mods = 'CTRL' },
  },
  { key = 'PageUp', action = wezterm.action.ScrollByPage(-1) },
  { key = 'PageDown', action = wezterm.action.ScrollByPage(1) },

  move_pane('j', 'Down'),
  move_pane('k', 'Up'),
  move_pane('h', 'Left'),
  move_pane('l', 'Right'),

  {
    -- When we push LEADER + R...
    key = 'r',
    mods = 'LEADER',
    -- Activate the `resize_panes` keytable
    action = wezterm.action.ActivateKeyTable {
      name = 'resize_panes',
      -- Ensures the keytable stays active after it handles its
      -- first keypress.
      one_shot = false,
      -- Deactivate the keytable after a timeout.
      timeout_milliseconds = 1000,
    }
  },

  {
    key = 'p',
    mods = 'LEADER',
    -- Present in to our project picker
    action = projects.choose_project(),
  },
  {
    key = 'f',
    mods = 'CMD|SHIFT',
    -- Present a list of existing workspaces
    action = wezterm.action.ShowLauncherArgs { flags = 'FUZZY|WORKSPACES' },
  },
  {
    key = 'a',
    mods = 'CMD|SHIFT',
    -- Present a list of existing tabs
    action = wezterm.action.ShowLauncherArgs { flags = 'FUZZY|TABS' },
  },
}

config.key_tables = {
  resize_panes = {
    resize_pane('j', 'Down'),
    resize_pane('k', 'Up'),
    resize_pane('h', 'Left'),
    resize_pane('l', 'Right'),
  },
}

return config