local wezterm = require("wezterm")
local io = require("io")
local os = require("os")

local keymod = "CTRL|SHIFT"

local light_theme = "Material"
local dark_theme = "MaterialDark"

wezterm.on("toggle-dark-mode", function (window, pane)
    local overrides = window:get_config_overrides() or {}
    if (overrides.color_scheme == light_theme) then
        overrides.color_scheme = dark_theme
    else
        overrides.color_scheme = light_theme
    end
    window:set_config_overrides(overrides)
end)

wezterm.on("read-scrollback", function (window, pane)
    local scrollback = pane:get_lines_as_text()

    local name = os.tmpname()
    local f = io.open(name, "w+")
    f:write(scrollback)
    f:flush()
    f:close()

    window:perform_action(wezterm.action{SpawnCommandInNewWindow = { args = { "nvim", name }}}, pane)

    wezterm.sleep_ms(1000)
    os.remove(name)
end)

wezterm.on("update-right-status", function (window, pane)
    local key = window:active_key_table()
    if key then
        key = "TABLE: " .. key
    end
    window:set_right_status(key or "")
end)

return {
    -- Thankfully, wezterm can detect fontconfig aliases.
    font = wezterm.font_with_fallback({
        "monospace",
        "Noto Color Emoji",
    }),
    color_scheme = dark_theme,

    default_prog = {"bash"},

    -- I'm liking the workflow I have with Kitty so no thanks for the default
    -- shortcuts. So this is what it feels like to be obnoxiously stubborn.
    disable_default_key_bindings = true,

    -- Don't tease me with the upcoming releases, man.
    check_for_updates = false,

    -- I'm very used to setting <SPACE> as the leader so I'm continuing the tradition.
    leader = { key = "Space", mods = keymod, timeout_milliseconds = 1000 },

    enable_wayland = true,
    force_reverse_video_cursor = true,

    -- Quick select-related options. Quite similar to Kitty hints which is
    -- nice.
    quick_select_patterns = {
        "[0-9a-f]{7,40}", -- SHA1 hashes, usually used for Git.
        "[0-9a-f]{7,64}", -- SHA256 hashes, used often for getting hashes for Guix packaging.
        "sha256-[[:alpha:][:digit:]=+/]{44}", -- SHA256 hashes in Base64, used often in getting hashes for Nix packaging.
    },

    mouse_bindings = {
        { event = { Down = { streak = 3, button = "Left" }},
          action = { SelectTextAtMouseCursor = "SemanticZone" },
          mods = "NONE" },
    },

    -- It also makes use of key tables which is defined after.
    keys = {
        -- Clipboard
        {key = "c", mods = keymod, action = wezterm.action { CopyTo = "Clipboard" }},
        {key = "v", mods = keymod, action = wezterm.action { PasteFrom = "Clipboard" }},
        {key = "w", mods = keymod, action = wezterm.action { EmitEvent = "toggle-dark-mode" }},
        {key = "e", mods = keymod, action = wezterm.action { EmitEvent = "read-scrollback" }},

        -- Font resize.
        {key = "+", mods = keymod, action = "IncreaseFontSize"},
        {key = "_", mods = keymod, action = "DecreaseFontSize"},
        {key = ")", mods = keymod, action = "ResetFontSize"},

        -- Scrollback
        {key = "j", mods = keymod, action = wezterm.action { ScrollByPage = 1 }},
        {key = "k", mods = keymod, action = wezterm.action { ScrollByPage = -1 }},
        {key = "j", mods = "CTRL|ALT", action = wezterm.action { ScrollToPrompt = 1 }},
        {key = "k", mods = "CTRL|ALT", action = wezterm.action { ScrollToPrompt = -1 }},

        -- Pane navigation.
        {key = "p", mods = "LEADER", action = wezterm.action.ActivateKeyTable { name = "pane_navigation", timeout_milliseconds = 1000, replace_current = true, one_shot = true, }},
        {key = "r", mods = "LEADER", action = wezterm.action {
            ActivateKeyTable = { name = "resize_pane", replace_current = true, one_shot = false }}},
        {key = "h", mods = keymod, action = wezterm.action { ActivatePaneDirection = "Left" }},
        {key = "l", mods = keymod, action = wezterm.action { ActivatePaneDirection = "Right" }},
        {key = "LeftArrow", mods = keymod, action = wezterm.action { ActivatePaneDirection = "Left" }},
        {key = "DownArrow", mods = keymod, action = wezterm.action { ActivatePaneDirection = "Down" }},
        {key = "UpArrow", mods = keymod, action = wezterm.action { ActivatePaneDirection = "Up" }},
        {key = "RightArrow", mods = keymod, action = wezterm.action { ActivatePaneDirection = "Right" }},

        -- More pane-related niceties.
        {key = "f", mods = "LEADER", action = "TogglePaneZoomState"},
        {key = "f", mods = keymod, action = "TogglePaneZoomState"},
        {key = "n", mods = "LEADER", action = wezterm.action { SplitHorizontal = { domain = "CurrentPaneDomain" }}},
        {key = "n", mods = keymod, action = wezterm.action { SplitHorizontal = { domain = "CurrentPaneDomain" }}},
        {key = "d", mods = keymod, action = wezterm.action { CloseCurrentPane = { confirm = false }}},

        -- Tab navigation
        {key = "t", mods = "LEADER", action = wezterm.action {
            ActivateKeyTable = { name = "tab_navigation", timeout_milliseconds = 1000, replace_current = true, one_shot = true, }}},

        -- Hints and quick selections
        {key = "h", mods = "LEADER", action = wezterm.action {
            ActivateKeyTable = { name = "hints", timeout_milliseconds = 1000, replace_current = true, one_shot = true }}},

        {key = "r", mods = keymod, action = "ReloadConfiguration" },

        -- Selection
        {key = "Space", mods = "LEADER", action = "QuickSelect" },
        {key = "a", mods = keymod, action = "QuickSelect" },
        {key = "s", mods = keymod, action = wezterm.action { Search = { CaseSensitiveString = "" }}},
    },

    key_tables = {
        hints = {
            {key = "g", action = wezterm.action { Search = { Regex = "[0-9a-f]{6,}" }}},
            {key = "h", action = wezterm.action { QuickSelectArgs = {
                patterns = {
                    "[0-9a-f]{7,40}", -- SHA1 hashes, usually used for Git.
                    "[0-9a-f]{7,64}", -- SHA256 hashes, used often for getting hashes for Guix packaging.
                    "sha256-[[:alpha:][:digit:]=+/]{44}", -- SHA256 hashes in Base64, used often in getting hashes for Nix packaging.
                    "[[:alpha:][:digit:]=+/]{44,64}"
                }}}},

            -- Basically the equivalent of `kitty hints word`.
            {key = "w", action = wezterm.action { QuickSelectArgs = {
                patterns = {
                    "\\S+"
                }}}},

            -- The equivalent to `kitty hints line`.
            {key = "l", action = wezterm.action { QuickSelectArgs = {
                patterns = {
                    ".+"
                }}}},

            {key = "p", action = wezterm.action { Search = { Regex = "legacyPackages[[:alpha:][:digit:]]+" }}},

            {key = "Space", action = "QuickSelect" },
            {key = "s", action = "QuickSelect" },
            {key = "f", action = wezterm.action { Search = { CaseSensitiveString = "" }}},
        },

        pane_navigation = {
            {key = "d", action = wezterm.action { CloseCurrentPane = { confirm = false }}},
            {key = "h", action = wezterm.action { ActivatePaneDirection = "Left" }},
            {key = "j", action = wezterm.action { ActivatePaneDirection = "Down" }},
            {key = "k", action = wezterm.action { ActivatePaneDirection = "Up" }},
            {key = "l", action = wezterm.action { ActivatePaneDirection = "Right" }},
            {key = "n", action = wezterm.action { SplitHorizontal = { domain = "CurrentPaneDomain" }}},
        },

        tab_navigation = {
            {key = "d", action = wezterm.action { CloseCurrentTab = { confirm = false }}},
            {key = "h", action = wezterm.action { ActivateTabRelative = -1 }},
            {key = "j", action = wezterm.action { ActivateTab = -1 }},
            {key = "k", action = wezterm.action { ActivateTab = 0 }},
            {key = "l", action = wezterm.action { ActivateTabRelative = 1 }},
            {key = "n", action = wezterm.action { SpawnTab = "CurrentPaneDomain" }},
        },

        resize_pane = {
            {key = "h", action = wezterm.action { AdjustPaneSize = { "Left", 1 }}},
            {key = "j", action = wezterm.action { AdjustPaneSize = { "Down", 1 }}},
            {key = "k", action = wezterm.action { AdjustPaneSize = { "Up", 1 }}},
            {key = "l", action = wezterm.action { AdjustPaneSize = { "Right", 1 }}},
            {key = "q", action = "PopKeyTable" },
            {key = "Escape", action = "PopKeyTable" },
            {key = "Enter", action = "PopKeyTable" },
        },
    },
}