use hedgewars_engine_messages::messages::{

    ConfigEngineMessage::*, EngineMessage::*, KeystrokeAction::*, SyncedEngineMessage::*,

    UnorderedEngineMessage::*, UnsyncedEngineMessage::*, *,

};

use self::gfx_gl::{CommandBuffer, Resources};

use gfx::format::{Unorm, D24, R8_G8_B8_A8};

use gfx_device_gl as gfx_gl;

use super::{ipc::IPC, world::World};

pub struct EngineGlContext {

    pub device: gfx_gl::Device,

    pub factory: gfx_gl::Factory,

    pub render_target: gfx::handle::RenderTargetView<Resources, (R8_G8_B8_A8, Unorm)>,

    pub depth_buffer: gfx::handle::DepthStencilView<Resources, (D24, Unorm)>,

    pub command_buffer: gfx::Encoder<Resources, CommandBuffer>,

}

pub struct EngineInstance {

    pub world: World,

    pub ipc: IPC,

    pub gl_context: Option<EngineGlContext>,

}

impl EngineInstance {

    pub fn new() -> Self {

        let world = World::new();

        Self {

            world,

            ipc: IPC::new(),

            gl_context: None,

        }

    }

    pub fn render<R, C>(

        &self,

        command_buffer: &mut gfx::Encoder<R, C>,

        render_target: &gfx::handle::RenderTargetView<R, gfx::format::Rgba8>,

    ) where

        R: gfx::Resources,

        C: gfx::CommandBuffer<R>,

    {

        command_buffer.clear(render_target, [0.0, 0.5, 0.0, 1.0]);

    }

    fn process_unordered_message(&mut self, message: &UnorderedEngineMessage) {

        match message {

            Pong => println!("Pong!"),

            _ => unimplemented!(),

        }

    }

    fn process_config_message(&mut self, message: &ConfigEngineMessage) {

        match message {

            SetSeed(seed) => self.world.set_seed(seed.as_bytes()),

            _ => unimplemented!(),

        }

    }

    pub fn process_ipc_queue(&mut self) {

        let messages: Vec<EngineMessage> = self.ipc.iter().collect();

        for message in messages {

            println!("Processing message: {:?}", message);

            match message {

                Unknown => println!("Unknown message"),

                Empty => println!("Empty message"),

                Synced(_, _) => unimplemented!(),

                Unsynced(_) => unimplemented!(),

                Unordered(unordered_message) => self.process_unordered_message(&unordered_message),

                Config(config_message) => self.process_config_message(&config_message),

            }

        }

    }

}