use mlua::prelude::*;

/**
    Trait for any struct that can be turned into an [`LuaThread`]
    and passed to the runtime, implemented for the following types:

    - Lua threads ([`LuaThread`])
    - Lua functions ([`LuaFunction`])
    - Lua chunks ([`LuaChunk`])
*/
pub trait IntoLuaThread<'lua> {
    /**
        Converts the value into a Lua thread.
    */
    fn into_lua_thread(self, lua: &'lua Lua) -> LuaResult<LuaThread<'lua>>;
}

impl<'lua> IntoLuaThread<'lua> for LuaThread<'lua> {
    fn into_lua_thread(self, _: &'lua Lua) -> LuaResult<LuaThread<'lua>> {
        Ok(self)
    }
}

impl<'lua> IntoLuaThread<'lua> for LuaFunction<'lua> {
    fn into_lua_thread(self, lua: &'lua Lua) -> LuaResult<LuaThread<'lua>> {
        lua.create_thread(self)
    }
}

impl<'lua> IntoLuaThread<'lua> for LuaChunk<'lua, '_> {
    fn into_lua_thread(self, lua: &'lua Lua) -> LuaResult<LuaThread<'lua>> {
        lua.create_thread(self.into_function()?)
    }
}