oxwm

use mlua::{Lua, Table, Value};

use std::cell::RefCell;

use std::rc::Rc;

use crate::bar::BlockConfig;

use crate::errors::ConfigError;

use crate::keyboard::handlers::{Arg, KeyAction, KeyBinding, KeyPress};

use crate::keyboard::keysyms::{self, Keysym};

use crate::ColorScheme;

use x11rb::protocol::xproto::KeyButMask;

#[derive(Clone)]

pub struct ConfigBuilder {

    pub border_width: u32,

    pub border_focused: u32,

    pub border_unfocused: u32,

    pub font: String,

    pub gaps_enabled: bool,

    pub smartgaps_enabled: bool,

    pub gap_inner_horizontal: u32,

    pub gap_inner_vertical: u32,

    pub gap_outer_horizontal: u32,

    pub gap_outer_vertical: u32,

    pub terminal: String,

    pub modkey: KeyButMask,

    pub tags: Vec<String>,

    pub layout_symbols: Vec<crate::LayoutSymbolOverride>,

    pub keybindings: Vec<KeyBinding>,

    pub window_rules: Vec<crate::WindowRule>,

    pub status_blocks: Vec<BlockConfig>,

    pub scheme_normal: ColorScheme,

    pub scheme_occupied: ColorScheme,

    pub scheme_selected: ColorScheme,

    pub autostart: Vec<String>,

}

impl Default for ConfigBuilder {

    fn default() -> Self {

        Self {

            border_width: 2,

            border_focused: 0x6dade3,

            border_unfocused: 0xbbbbbb,

            font: "monospace:style=Bold:size=10".to_string(),

            gaps_enabled: true,

            smartgaps_enabled: true,

            gap_inner_horizontal: 5,

            gap_inner_vertical: 5,

            gap_outer_horizontal: 5,

            gap_outer_vertical: 5,

            terminal: "st".to_string(),

            modkey: KeyButMask::MOD4,

            tags: vec!["1".into(), "2".into(), "3".into()],

            layout_symbols: Vec::new(),

            keybindings: Vec::new(),

            window_rules: Vec::new(),

            status_blocks: Vec::new(),

            scheme_normal: ColorScheme {

                foreground: 0xffffff,

                background: 0x000000,

                underline: 0x444444,

            },

            scheme_occupied: ColorScheme {

                foreground: 0xffffff,

                background: 0x000000,

                underline: 0x444444,

            },

            scheme_selected: ColorScheme {

                foreground: 0xffffff,

                background: 0x000000,

                underline: 0x444444,

            },

            autostart: Vec::new(),

        }

    }

}

type SharedBuilder = Rc<RefCell<ConfigBuilder>>;

pub fn register_api(lua: &Lua) -> Result<SharedBuilder, ConfigError> {

    let builder = Rc::new(RefCell::new(ConfigBuilder::default()));

    let oxwm_table = lua.create_table()?;

    register_spawn(&lua, &oxwm_table, builder.clone())?;

    register_key_module(&lua, &oxwm_table, builder.clone())?;

    register_gaps_module(&lua, &oxwm_table, builder.clone())?;

    register_border_module(&lua, &oxwm_table, builder.clone())?;

    register_client_module(&lua, &oxwm_table)?;

    register_layout_module(&lua, &oxwm_table)?;

    register_tag_module(&lua, &oxwm_table)?;

    register_monitor_module(&lua, &oxwm_table)?;

    register_rule_module(&lua, &oxwm_table, builder.clone())?;

    register_bar_module(&lua, &oxwm_table, builder.clone())?;

    register_misc(&lua, &oxwm_table, builder.clone())?;

    lua.globals().set("oxwm", oxwm_table)?;

    Ok(builder)

}

fn register_spawn(lua: &Lua, parent: &Table, _builder: SharedBuilder) -> Result<(), ConfigError> {

    let spawn = lua.create_function(|lua, cmd: Value| {

        create_action_table(lua, "Spawn", cmd)

    })?;

    let spawn_terminal = lua.create_function(|lua, ()| {

        create_action_table(lua, "SpawnTerminal", Value::Nil)

    })?;

    parent.set("spawn", spawn)?;

    parent.set("spawn_terminal", spawn_terminal)?;

    Ok(())

}

fn register_key_module(lua: &Lua, parent: &Table, builder: SharedBuilder) -> Result<(), ConfigError> {

    let key_table = lua.create_table()?;

    let builder_clone = builder.clone();

    let bind = lua.create_function(move |lua, (mods, key, action): (Value, String, Value)| {

        let modifiers = parse_modifiers_value(lua, mods)?;

        let keysym = parse_keysym(&key)?;

        let (key_action, arg) = parse_action_value(lua, action)?;

        let binding = KeyBinding::single_key(modifiers, keysym, key_action, arg);

        builder_clone.borrow_mut().keybindings.push(binding);

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let chord = lua.create_function(move |lua, (keys, action): (Table, Value)| {

        let mut key_presses = Vec::new();

        for i in 1..=keys.len()? {

            let key_spec: Table = keys.get(i)?;

            let mods: Value = key_spec.get(1)?;

            let key: String = key_spec.get(2)?;

            let modifiers = parse_modifiers_value(lua, mods)?;

            let keysym = parse_keysym(&key)?;

            key_presses.push(KeyPress { modifiers, keysym });

        }

        let (key_action, arg) = parse_action_value(lua, action)?;

        let binding = KeyBinding::new(key_presses, key_action, arg);

        builder_clone.borrow_mut().keybindings.push(binding);

        Ok(())

    })?;

    key_table.set("bind", bind)?;

    key_table.set("chord", chord)?;

    parent.set("key", key_table)?;

    Ok(())

}

fn register_gaps_module(lua: &Lua, parent: &Table, builder: SharedBuilder) -> Result<(), ConfigError> {

    let gaps_table = lua.create_table()?;

    let builder_clone = builder.clone();

    let set_enabled = lua.create_function(move |_, enabled: bool| {

        builder_clone.borrow_mut().gaps_enabled = enabled;

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let enable = lua.create_function(move |_, ()| {

        builder_clone.borrow_mut().gaps_enabled = true;

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let disable = lua.create_function(move |_, ()| {

        builder_clone.borrow_mut().gaps_enabled = false;

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let set_inner = lua.create_function(move |_, (h, v): (u32, u32)| {

        let mut b = builder_clone.borrow_mut();

        b.gap_inner_horizontal = h;

        b.gap_inner_vertical = v;

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let set_outer = lua.create_function(move |_, (h, v): (u32, u32)| {

        let mut b = builder_clone.borrow_mut();

        b.gap_outer_horizontal = h;

        b.gap_outer_vertical = v;

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let set_smart = lua.create_function(move |_, enabled: bool| {

        builder_clone.borrow_mut().smartgaps_enabled = enabled;

        Ok(())

    })?;

    gaps_table.set("set_enabled", set_enabled)?;

    gaps_table.set("enable", enable)?;

    gaps_table.set("disable", disable)?;

    gaps_table.set("set_inner", set_inner)?;

    gaps_table.set("set_outer", set_outer)?;

    gaps_table.set("set_smart", set_smart)?;

    parent.set("gaps", gaps_table)?;

    Ok(())

}

fn register_border_module(lua: &Lua, parent: &Table, builder: SharedBuilder) -> Result<(), ConfigError> {

    let border_table = lua.create_table()?;

    let builder_clone = builder.clone();

    let set_width = lua.create_function(move |_, width: u32| {

        builder_clone.borrow_mut().border_width = width;

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let set_focused_color = lua.create_function(move |_, color: Value| {

        let color_u32 = parse_color_value(color)?;

        builder_clone.borrow_mut().border_focused = color_u32;

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let set_unfocused_color = lua.create_function(move |_, color: Value| {

        let color_u32 = parse_color_value(color)?;

        builder_clone.borrow_mut().border_unfocused = color_u32;

        Ok(())

    })?;

    border_table.set("set_width", set_width)?;

    border_table.set("set_focused_color", set_focused_color)?;

    border_table.set("set_unfocused_color", set_unfocused_color)?;

    parent.set("border", border_table)?;

    Ok(())

}

fn register_client_module(lua: &Lua, parent: &Table) -> Result<(), ConfigError> {

    let client_table = lua.create_table()?;

    let kill = lua.create_function(|lua, ()| {

        create_action_table(lua, "KillClient", Value::Nil)

    })?;

    let toggle_fullscreen = lua.create_function(|lua, ()| {

        create_action_table(lua, "ToggleFullScreen", Value::Nil)

    })?;

    let toggle_floating = lua.create_function(|lua, ()| {

        create_action_table(lua, "ToggleFloating", Value::Nil)

    })?;

    let focus_stack = lua.create_function(|lua, dir: i32| {

        create_action_table(lua, "FocusStack", Value::Integer(dir as i64))

    })?;

    let move_stack = lua.create_function(|lua, dir: i32| {

        create_action_table(lua, "MoveStack", Value::Integer(dir as i64))

    })?;

    client_table.set("kill", kill)?;

    client_table.set("toggle_fullscreen", toggle_fullscreen)?;

    client_table.set("toggle_floating", toggle_floating)?;

    client_table.set("focus_stack", focus_stack)?;

    client_table.set("move_stack", move_stack)?;

    parent.set("client", client_table)?;

    Ok(())

}

fn register_layout_module(lua: &Lua, parent: &Table) -> Result<(), ConfigError> {

    let layout_table = lua.create_table()?;

    let cycle = lua.create_function(|lua, ()| {

        create_action_table(lua, "CycleLayout", Value::Nil)

    })?;

    let set = lua.create_function(|lua, name: String| {

        create_action_table(lua, "ChangeLayout", Value::String(lua.create_string(&name)?))

    })?;

    layout_table.set("cycle", cycle)?;

    layout_table.set("set", set)?;

    parent.set("layout", layout_table)?;

    Ok(())

}

fn register_tag_module(lua: &Lua, parent: &Table) -> Result<(), ConfigError> {

    let tag_table = lua.create_table()?;

    let view = lua.create_function(|lua, idx: i32| {

        create_action_table(lua, "ViewTag", Value::Integer(idx as i64))

    })?;

    let toggleview = lua.create_function(|lua, idx: i32| {

        create_action_table(lua, "ToggleView", Value::Integer(idx as i64))

    })?;

    let move_to = lua.create_function(|lua, idx: i32| {

        create_action_table(lua, "MoveToTag", Value::Integer(idx as i64))

    })?;

    let toggletag = lua.create_function(|lua, idx: i32| {

        create_action_table(lua, "ToggleTag", Value::Integer(idx as i64))

    })?;

    tag_table.set("view", view)?;

    tag_table.set("toggleview", toggleview)?;

    tag_table.set("move_to", move_to)?;

    tag_table.set("toggletag", toggletag)?;

    parent.set("tag", tag_table)?;

    Ok(())

}

fn register_monitor_module(lua: &Lua, parent: &Table) -> Result<(), ConfigError> {

    let monitor_table = lua.create_table()?;

    let focus = lua.create_function(|lua, direction: i64| {

        create_action_table(lua, "FocusMonitor", Value::Integer(direction))

    })?;

    let tag = lua.create_function(|lua, direction: i64| {

        create_action_table(lua, "TagMonitor", Value::Integer(direction))

    })?;

    monitor_table.set("focus", focus)?;

    monitor_table.set("tag", tag)?;

    parent.set("monitor", monitor_table)?;

    Ok(())

}

fn register_rule_module(lua: &Lua, parent: &Table, builder: SharedBuilder) -> Result<(), ConfigError> {

    let rule_table = lua.create_table()?;

    let builder_clone = builder.clone();

    let add = lua.create_function(move |_, config: Table| {

        let class: Option<String> = config.get("class").ok();

        let instance: Option<String> = config.get("instance").ok();

        let title: Option<String> = config.get("title").ok();

        let is_floating: Option<bool> = config.get("floating").ok();

        let monitor: Option<usize> = config.get("monitor").ok();

        let tags: Option<u32> = if let Ok(tag_index) = config.get::<i32>("tag") {

            if tag_index > 0 {

                Some(1 << (tag_index - 1))

            } else {

                None

            }

        } else {

            None

        };

        let rule = crate::WindowRule {

            class,

            instance,

            title,

            tags,

            is_floating,

            monitor,

        };

        builder_clone.borrow_mut().window_rules.push(rule);

        Ok(())

    })?;

    rule_table.set("add", add)?;

    parent.set("rule", rule_table)?;

    Ok(())

}

fn register_bar_module(lua: &Lua, parent: &Table, builder: SharedBuilder) -> Result<(), ConfigError> {

    let bar_table = lua.create_table()?;

    let builder_clone = builder.clone();

    let set_font = lua.create_function(move |_, font: String| {

        builder_clone.borrow_mut().font = font;

        Ok(())

    })?;

    let block_table = lua.create_table()?;

    let ram = lua.create_function(|lua, config: Table| {

        create_block_config(lua, config, "Ram", None)

    })?;

    let datetime = lua.create_function(|lua, config: Table| {

        let date_format: String = config.get("date_format")

            .map_err(|_| mlua::Error::RuntimeError("oxwm.bar.block.datetime: 'date_format' field is required (e.g., '%H:%M')".into()))?;

        create_block_config(lua, config, "DateTime", Some(Value::String(lua.create_string(&date_format)?)))

    })?;

    let shell = lua.create_function(|lua, config: Table| {

        let command: String = config.get("command")

            .map_err(|_| mlua::Error::RuntimeError("oxwm.bar.block.shell: 'command' field is required".into()))?;

        create_block_config(lua, config, "Shell", Some(Value::String(lua.create_string(&command)?)))

    })?;

    let static_block = lua.create_function(|lua, config: Table| {

        let text: String = config.get("text")

            .map_err(|_| mlua::Error::RuntimeError("oxwm.bar.block.static: 'text' field is required".into()))?;

        create_block_config(lua, config, "Static", Some(Value::String(lua.create_string(&text)?)))

    })?;

    let battery = lua.create_function(|lua, config: Table| {

        let charging: String = config.get("charging")

            .map_err(|_| mlua::Error::RuntimeError("oxwm.bar.block.battery: 'charging' field is required".into()))?;

        let discharging: String = config.get("discharging")

            .map_err(|_| mlua::Error::RuntimeError("oxwm.bar.block.battery: 'discharging' field is required".into()))?;

        let full: String = config.get("full")

            .map_err(|_| mlua::Error::RuntimeError("oxwm.bar.block.battery: 'full' field is required".into()))?;

        let formats_table = lua.create_table()?;

        formats_table.set("charging", charging)?;

        formats_table.set("discharging", discharging)?;

        formats_table.set("full", full)?;

        create_block_config(lua, config, "Battery", Some(Value::Table(formats_table)))

    })?;

    block_table.set("ram", ram)?;

    block_table.set("datetime", datetime)?;

    block_table.set("shell", shell)?;

    block_table.set("static", static_block)?;

    block_table.set("battery", battery)?;

    // Deprecated add_block() function for backwards compatibility

    // This allows old configs to still work, but users should migrate to set_blocks()

    let builder_clone = builder.clone();

    let add_block = lua.create_function(move |_, (format, block_type, arg, interval, color, underline): (String, String, Value, u64, Value, Option<bool>)| -> mlua::Result<()> {

        eprintln!("WARNING: oxwm.bar.add_block() is deprecated. Please migrate to oxwm.bar.set_blocks() with block constructors.");

        eprintln!("See the migration guide for details.");

        let cmd = match block_type.as_str() {

            "DateTime" => {

                let fmt = if let Value::String(s) = arg {

                    s.to_str()?.to_string()

                } else {

                    return Err(mlua::Error::RuntimeError("DateTime block requires format string as third argument".into()));

                };

                crate::bar::BlockCommand::DateTime(fmt)

            }

            "Shell" => {

                let cmd_str = if let Value::String(s) = arg {

                    s.to_str()?.to_string()

                } else {

                    return Err(mlua::Error::RuntimeError("Shell block requires command string as third argument".into()));

                };

                crate::bar::BlockCommand::Shell(cmd_str)

            }

            "Ram" => crate::bar::BlockCommand::Ram,

            "Static" => {

                let text = if let Value::String(s) = arg {

                    s.to_str()?.to_string()

                } else {

                    String::new()

                };

                crate::bar::BlockCommand::Static(text)

            }

            "Battery" => {

                return Err(mlua::Error::RuntimeError(

                    "Battery block is not supported with add_block(). Please use oxwm.bar.set_blocks() with oxwm.bar.block.battery()".into()

                ));

            }

            _ => return Err(mlua::Error::RuntimeError(format!("Unknown block type '{}'", block_type))),

        };

        let color_u32 = parse_color_value(color)?;

        let block = crate::bar::BlockConfig {

            format,

            command: cmd,

            interval_secs: interval,

            color: color_u32,

            underline: underline.unwrap_or(false),

        };

        builder_clone.borrow_mut().status_blocks.push(block);

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let set_blocks = lua.create_function(move |_, blocks: Table| {

        use crate::bar::BlockCommand;

        let mut block_configs = Vec::new();

        for i in 1..=blocks.len()? {

            let block_table: Table = blocks.get(i)?;

            let block_type: String = block_table.get("__block_type")?;

            let format: String = block_table.get("format").unwrap_or_default();

            let interval: u64 = block_table.get("interval")?;

            let color_val: Value = block_table.get("color")?;

            let underline: bool = block_table.get("underline").unwrap_or(false);

            let arg: Option<Value> = block_table.get("__arg").ok();

            let cmd = match block_type.as_str() {

                "DateTime" => {

                    let fmt = arg.and_then(|v| {

                        if let Value::String(s) = v {

                            s.to_str().ok().map(|s| s.to_string())

                        } else {

                            None

                        }

                    }).ok_or_else(|| mlua::Error::RuntimeError("DateTime block missing format".into()))?;

                    BlockCommand::DateTime(fmt)

                }

                "Shell" => {

                    let cmd_str = arg.and_then(|v| {

                        if let Value::String(s) = v {

                            s.to_str().ok().map(|s| s.to_string())

                        } else {

                            None

                        }

                    }).ok_or_else(|| mlua::Error::RuntimeError("Shell block missing command".into()))?;

                    BlockCommand::Shell(cmd_str)

                }

                "Ram" => BlockCommand::Ram,

                "Static" => {

                    let text = arg.and_then(|v| {

                        if let Value::String(s) = v {

                            s.to_str().ok().map(|s| s.to_string())

                        } else {

                            None

                        }

                    }).unwrap_or_default();

                    BlockCommand::Static(text)

                }

                "Battery" => {

                    let formats = arg.and_then(|v| {

                        if let Value::Table(t) = v {

                            Some(t)

                        } else {

                            None

                        }

                    }).ok_or_else(|| mlua::Error::RuntimeError("Battery block missing formats".into()))?;

                    let charging: String = formats.get("charging")?;

                    let discharging: String = formats.get("discharging")?;

                    let full: String = formats.get("full")?;

                    BlockCommand::Battery {

                        format_charging: charging,

                        format_discharging: discharging,

                        format_full: full,

                    }

                }

                _ => return Err(mlua::Error::RuntimeError(format!("Unknown block type '{}'", block_type))),

            };

            let color_u32 = parse_color_value(color_val)?;

            let block = crate::bar::BlockConfig {

                format,

                command: cmd,

                interval_secs: interval,

                color: color_u32,

                underline,

            };

            block_configs.push(block);

        }

        builder_clone.borrow_mut().status_blocks = block_configs;

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let set_scheme_normal = lua.create_function(move |_, (fg, bg, ul): (Value, Value, Value)| {

        let foreground = parse_color_value(fg)?;

        let background = parse_color_value(bg)?;

        let underline = parse_color_value(ul)?;

        builder_clone.borrow_mut().scheme_normal = ColorScheme {

            foreground,

            background,

            underline,

        };

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let set_scheme_occupied = lua.create_function(move |_, (fg, bg, ul): (Value, Value, Value)| {

        let foreground = parse_color_value(fg)?;

        let background = parse_color_value(bg)?;

        let underline = parse_color_value(ul)?;

        builder_clone.borrow_mut().scheme_occupied = ColorScheme {

            foreground,

            background,

            underline,

        };

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let set_scheme_selected = lua.create_function(move |_, (fg, bg, ul): (Value, Value, Value)| {

        let foreground = parse_color_value(fg)?;

        let background = parse_color_value(bg)?;

        let underline = parse_color_value(ul)?;

        builder_clone.borrow_mut().scheme_selected = ColorScheme {

            foreground,

            background,

            underline,

        };

        Ok(())

    })?;

    bar_table.set("set_font", set_font)?;

    bar_table.set("block", block_table)?;

    bar_table.set("add_block", add_block)?;  // Deprecated, for backwards compatibility

    bar_table.set("set_blocks", set_blocks)?;

    bar_table.set("set_scheme_normal", set_scheme_normal)?;

    bar_table.set("set_scheme_occupied", set_scheme_occupied)?;

    bar_table.set("set_scheme_selected", set_scheme_selected)?;

    parent.set("bar", bar_table)?;

    Ok(())

}

fn register_misc(lua: &Lua, parent: &Table, builder: SharedBuilder) -> Result<(), ConfigError> {

    let builder_clone = builder.clone();

    let set_terminal = lua.create_function(move |_, term: String| {

        builder_clone.borrow_mut().terminal = term;

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let set_modkey = lua.create_function(move |_, modkey_str: String| {

        let modkey = parse_modkey_string(&modkey_str)

            .map_err(|e| mlua::Error::RuntimeError(format!("{}", e)))?;

        builder_clone.borrow_mut().modkey = modkey;

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let set_tags = lua.create_function(move |_, tags: Vec<String>| {

        builder_clone.borrow_mut().tags = tags;

        Ok(())

    })?;

    let quit = lua.create_function(|lua, ()| {

        create_action_table(lua, "Quit", Value::Nil)

    })?;

    let restart = lua.create_function(|lua, ()| {

        create_action_table(lua, "Restart", Value::Nil)

    })?;

    let recompile = lua.create_function(|lua, ()| {

        create_action_table(lua, "Recompile", Value::Nil)

    })?;

    let toggle_gaps = lua.create_function(|lua, ()| {

        create_action_table(lua, "ToggleGaps", Value::Nil)

    })?;

    let set_master_factor = lua.create_function(|lua, delta: i32| {

        create_action_table(lua, "SetMasterFactor", Value::Integer(delta as i64))

    })?;

    let inc_num_master = lua.create_function(|lua, delta: i32| {

        create_action_table(lua, "IncNumMaster", Value::Integer(delta as i64))

    })?;

    let show_keybinds = lua.create_function(|lua, ()| {

        create_action_table(lua, "ShowKeybindOverlay", Value::Nil)

    })?;

    let focus_monitor = lua.create_function(|lua, idx: i32| {

        create_action_table(lua, "FocusMonitor", Value::Integer(idx as i64))

    })?;

    let builder_clone = builder.clone();

    let set_layout_symbol = lua.create_function(move |_, (name, symbol): (String, String)| {

        builder_clone.borrow_mut().layout_symbols.push(crate::LayoutSymbolOverride {

            name,

            symbol,

        });

        Ok(())

    })?;

    let builder_clone = builder.clone();

    let autostart = lua.create_function(move |_, cmd: String| {

        builder_clone.borrow_mut().autostart.push(cmd);

        Ok(())

    })?;

    parent.set("set_terminal", set_terminal)?;

    parent.set("set_modkey", set_modkey)?;

    parent.set("set_tags", set_tags)?;

    parent.set("set_layout_symbol", set_layout_symbol)?;

    parent.set("autostart", autostart)?;

    parent.set("quit", quit)?;

    parent.set("restart", restart)?;

    parent.set("recompile", recompile)?;

    parent.set("toggle_gaps", toggle_gaps)?;

    parent.set("set_master_factor", set_master_factor)?;

    parent.set("inc_num_master", inc_num_master)?;

    parent.set("show_keybinds", show_keybinds)?;

    parent.set("focus_monitor", focus_monitor)?;

    Ok(())

}

fn parse_modifiers_value(_lua: &Lua, value: Value) -> mlua::Result<Vec<KeyButMask>> {

    match value {

        Value::Table(t) => {

            let mut mods = Vec::new();

            for i in 1..=t.len()? {

                let mod_str: String = t.get(i)?;

                let mask = parse_modkey_string(&mod_str)

                    .map_err(|e| mlua::Error::RuntimeError(format!("oxwm.key.bind: invalid modifier - {}", e)))?;

                mods.push(mask);

            }

            Ok(mods)

        }

        Value::String(s) => {

            let s_str = s.to_str()?;

            let mask = parse_modkey_string(&s_str)

                .map_err(|e| mlua::Error::RuntimeError(format!("oxwm.key.bind: invalid modifier - {}", e)))?;

            Ok(vec![mask])

        }

        _ => Err(mlua::Error::RuntimeError(

            "oxwm.key.bind: first argument must be a table of modifiers like {\"Mod4\"} or {\"Mod4\", \"Shift\"}".into(),

        )),

    }

}

fn parse_modkey_string(s: &str) -> Result<KeyButMask, ConfigError> {

    match s {

        "Mod1" => Ok(KeyButMask::MOD1),

        "Mod2" => Ok(KeyButMask::MOD2),

        "Mod3" => Ok(KeyButMask::MOD3),

        "Mod4" => Ok(KeyButMask::MOD4),

        "Mod5" => Ok(KeyButMask::MOD5),

        "Shift" => Ok(KeyButMask::SHIFT),

        "Control" => Ok(KeyButMask::CONTROL),

        _ => Err(ConfigError::InvalidModkey(format!("'{}' is not a valid modifier. Use one of: Mod1, Mod4, Shift, Control", s))),

    }

}

fn parse_keysym(key: &str) -> mlua::Result<Keysym> {

    keysyms::keysym_from_str(key)

        .ok_or_else(|| mlua::Error::RuntimeError(format!("unknown key '{}'. valid keys include: Return, Space, A-Z, 0-9, F1-F12, Left, Right, Up, Down, etc. check oxwm.lua type definitions for the complete list", key)))

}

fn parse_action_value(_lua: &Lua, value: Value) -> mlua::Result<(KeyAction, Arg)> {

    match value {

        Value::Function(_) => {

            Err(mlua::Error::RuntimeError(

                "action must be a function call, not a function reference. did you forget ()? example: oxwm.spawn('st') not oxwm.spawn".into()

            ))

        }

        Value::Table(t) => {

            if let Ok(action_name) = t.get::<String>("__action") {

                let action = string_to_action(&action_name)?;

                let arg = if let Ok(arg_val) = t.get::<Value>("__arg") {

                    value_to_arg(arg_val)?

                } else {

                    Arg::None

                };

                return Ok((action, arg));

            }

            Err(mlua::Error::RuntimeError(

                "action must be a table returned by oxwm functions like oxwm.spawn(), oxwm.client.kill(), oxwm.quit(), etc.".into(),

            ))

        }

        _ => Err(mlua::Error::RuntimeError(

            "action must be a table returned by oxwm functions like oxwm.spawn(), oxwm.client.kill(), oxwm.quit(), etc.".into(),

        )),

    }

}

fn string_to_action(s: &str) -> mlua::Result<KeyAction> {

    match s {

        "Spawn" => Ok(KeyAction::Spawn),

        "SpawnTerminal" => Ok(KeyAction::SpawnTerminal),

        "KillClient" => Ok(KeyAction::KillClient),

        "FocusStack" => Ok(KeyAction::FocusStack),

        "MoveStack" => Ok(KeyAction::MoveStack),

        "Quit" => Ok(KeyAction::Quit),

        "Restart" => Ok(KeyAction::Restart),

        "Recompile" => Ok(KeyAction::Recompile),

        "ViewTag" => Ok(KeyAction::ViewTag),

        "ToggleView" => Ok(KeyAction::ToggleView),

        "MoveToTag" => Ok(KeyAction::MoveToTag),

        "ToggleTag" => Ok(KeyAction::ToggleTag),

        "ToggleGaps" => Ok(KeyAction::ToggleGaps),

        "SetMasterFactor" => Ok(KeyAction::SetMasterFactor),

        "IncNumMaster" => Ok(KeyAction::IncNumMaster),

        "ToggleFullScreen" => Ok(KeyAction::ToggleFullScreen),

        "ToggleFloating" => Ok(KeyAction::ToggleFloating),

        "ChangeLayout" => Ok(KeyAction::ChangeLayout),

        "CycleLayout" => Ok(KeyAction::CycleLayout),

        "FocusMonitor" => Ok(KeyAction::FocusMonitor),

        "TagMonitor" => Ok(KeyAction::TagMonitor),

        "ShowKeybindOverlay" => Ok(KeyAction::ShowKeybindOverlay),

        _ => Err(mlua::Error::RuntimeError(format!("unknown action '{}'. this is an internal error, please report it", s))),

    }

}

fn value_to_arg(value: Value) -> mlua::Result<Arg> {

    match value {

        Value::Nil => Ok(Arg::None),

        Value::String(s) => Ok(Arg::Str(s.to_str()?.to_string())),

        Value::Integer(i) => Ok(Arg::Int(i as i32)),

        Value::Number(n) => Ok(Arg::Int(n as i32)),

        Value::Table(t) => {

            let mut arr = Vec::new();

            for i in 1..=t.len()? {

                let item: String = t.get(i)?;

                arr.push(item);

            }

            Ok(Arg::Array(arr))

        }

        _ => Ok(Arg::None),

    }

}

fn create_action_table(lua: &Lua, action_name: &str, arg: Value) -> mlua::Result<Table> {

    let table = lua.create_table()?;

    table.set("__action", action_name)?;

    table.set("__arg", arg)?;

    Ok(table)

}

fn parse_color_value(value: Value) -> mlua::Result<u32> {

    match value {

        Value::Integer(i) => Ok(i as u32),

        Value::Number(n) => Ok(n as u32),

        Value::String(s) => {

            let s = s.to_str()?;

            if s.starts_with('#') {

                u32::from_str_radix(&s[1..], 16)

                    .map_err(|e| mlua::Error::RuntimeError(format!("invalid hex color '{}': {}. use format like #ff0000 or 0xff0000", s, e)))

            } else if s.starts_with("0x") {

                u32::from_str_radix(&s[2..], 16)

                    .map_err(|e| mlua::Error::RuntimeError(format!("invalid hex color '{}': {}. use format like 0xff0000 or #ff0000", s, e)))

            } else {

                s.parse::<u32>()

                    .map_err(|e| mlua::Error::RuntimeError(format!("invalid color '{}': {}. use hex format like 0xff0000 or #ff0000", s, e)))

            }

        }

        _ => Err(mlua::Error::RuntimeError(

            "color must be a number (0xff0000) or string ('#ff0000' or '0xff0000')".into(),

        )),

    }

}

fn create_block_config(lua: &Lua, config: Table, block_type: &str, arg: Option<Value>) -> mlua::Result<Table> {

    let table = lua.create_table()?;

    table.set("__block_type", block_type)?;

    let format: String = config.get("format").unwrap_or_default();

    let interval: u64 = config.get("interval")?;

    let color: Value = config.get("color")?;

    let underline: bool = config.get("underline").unwrap_or(false);

    table.set("format", format)?;

    table.set("interval", interval)?;

    table.set("color", color)?;

    table.set("underline", underline)?;

    if let Some(arg_val) = arg {

        table.set("__arg", arg_val)?;

    }

    Ok(table)

}