//! Lua bindings for the macro recorder.
//!
//! Usage from Lua:
//!   jarvis.macros.start("работа")    -- begin recording
//!   jarvis.macros.save()             -- persist + stop
//!   jarvis.macros.cancel()           -- abort without saving
//!   jarvis.macros.replay("работа")   -- play back; returns step count or nil
//!   jarvis.macros.list()             -- array of {name, steps_count, last_run}
//!   jarvis.macros.delete(name)       -- removes
//!   jarvis.macros.is_recording()     -- bool
//!   jarvis.macros.recording_name()   -- string or nil

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

use crate::macros;

pub fn register(lua: &Lua, jarvis: &Table) -> mlua::Result<()> {
    let m = lua.create_table()?;

    m.set("start", lua.create_function(|_, name: String| {
        macros::start_recording(&name).map_err(mlua::Error::external)
    })?)?;

    m.set("save", lua.create_function(|_, ()| {
        macros::save_recording().map_err(mlua::Error::external)
    })?)?;

    m.set("cancel", lua.create_function(|_, ()| {
        Ok(macros::cancel_recording())
    })?)?;

    m.set("is_recording", lua.create_function(|_, ()| {
        Ok(macros::is_recording())
    })?)?;

    m.set("recording_name", lua.create_function(|lua, ()| {
        match macros::recording_name() {
            Some(n) => Ok(Value::String(lua.create_string(n)?)),
            None => Ok(Value::Nil),
        }
    })?)?;

    m.set("replay", lua.create_function(|_, name: String| {
        macros::replay(&name).map_err(mlua::Error::external)
    })?)?;

    m.set("delete", lua.create_function(|_, name: String| {
        Ok(macros::delete(&name))
    })?)?;

    m.set("list", lua.create_function(|lua, ()| {
        let arr = lua.create_table()?;
        for (i, mac) in macros::list().iter().enumerate() {
            let row = lua.create_table()?;
            row.set("name", mac.name.clone())?;
            row.set("steps_count", mac.steps.len())?;
            row.set("created_at", mac.created_at)?;
            let last: Value = match mac.last_run {
                Some(ts) => Value::Integer(ts),
                None => Value::Nil,
            };
            row.set("last_run", last)?;
            arr.set(i + 1, row)?;
        }
        Ok(arr)
    })?)?;

    jarvis.set("macros", m)?;
    Ok(())
}