use crate::{
    data::Gamedata,
    interaction::interact,
    protocol::{ItemIndex, PacketC, PacketS, PlayerID, RecipeIndex, TileIndex},
};
use anyhow::{anyhow, bail, Result};
use glam::{IVec2, Vec2};
use log::info;
use std::{
    collections::{HashMap, VecDeque},
    ops::Deref,
    sync::Arc,
};

pub struct Involvement {
    pub recipe: RecipeIndex,
    pub progress: f32,
    pub working: usize,
}

pub struct Item {
    pub kind: ItemIndex,
    pub active: Option<Involvement>,
}

pub struct Tile {
    pub kind: TileIndex,
    pub item: Option<Item>,
}

pub struct Player {
    pub name: String,
    pub position: Vec2,
    pub interacting: bool,
    pub item: Option<Item>,
}

pub struct Game {
    data: Arc<Gamedata>,
    tiles: HashMap<IVec2, Tile>,
    players: HashMap<PlayerID, Player>,
    packet_out: VecDeque<PacketC>,
}

impl Game {
    pub fn new(gamedata: Arc<Gamedata>) -> Self {
        let mut g = Self {
            data: gamedata.clone(),
            packet_out: Default::default(),
            players: Default::default(),
            tiles: Default::default(),
        };
        for (&p, &t) in &gamedata.initial_map {
            g.tiles.insert(p, t.into());
        }
        g
    }

    pub fn packet_out(&mut self) -> Option<PacketC> {
        self.packet_out.pop_front()
    }

    pub fn prime_client(&self, id: PlayerID) -> Vec<PacketC> {
        let mut out = Vec::new();
        out.push(PacketC::Init {
            id,
            data: self.data.deref().to_owned(),
        });
        for (&id, player) in &self.players {
            out.push(PacketC::AddPlayer {
                id,
                name: player.name.clone(),
                hand: player.item.as_ref().map(|i| i.kind),
            })
        }
        for (&tile, tdata) in &self.tiles {
            out.push(PacketC::UpdateMap {
                pos: tile,
                tile: tdata.kind.clone(),
            });
            if let Some(item) = &tdata.item {
                out.push(PacketC::ProduceItem {
                    item: item.kind,
                    tile,
                })
            }
        }
        out
    }

    pub fn packet_in(&mut self, player: PlayerID, packet: PacketS) -> Result<()> {
        match packet {
            PacketS::Join { name } => {
                self.players.insert(
                    player,
                    Player {
                        item: None,
                        position: self.data.spawn,
                        interacting: false,
                        name: name.clone(),
                    },
                );
                self.packet_out.push_back(PacketC::AddPlayer {
                    id: player,
                    name,
                    hand: None,
                });
            }
            PacketS::Leave => {
                let p = self
                    .players
                    .remove(&player)
                    .ok_or(anyhow!("player does not exist"))?;
                if let Some(id) = p.item {
                    // TODO place on ground
                }
                self.packet_out
                    .push_back(PacketC::RemovePlayer { id: player })
            }
            PacketS::Position { pos, rot } => {
                self.packet_out
                    .push_back(PacketC::Position { player, pos, rot });
            }
            PacketS::Interact { pos, edge } => {
                info!("interact {pos:?} edge={edge}");

                let pid = player;
                let player = self
                    .players
                    .get_mut(&player)
                    .ok_or(anyhow!("player does not exist"))?;
                let tile = self
                    .tiles
                    .get_mut(&pos)
                    .ok_or(anyhow!("tile does not exist"))?;

                if edge == player.interacting {
                    bail!("already (not) interacting")
                }

                let tile_had_item = tile.item.is_some();

                interact(&self.data, edge, tile, player);

                // interact(
                //     &self.data,
                //     edge,
                //     tilekind,
                //     &mut tile.active,
                //     item,
                //     hand,
                //     |out| match out {
                //         Out::Take(index) => {
                //             info!("take");
                //             let item = tile.items.remove(index);
                //             player.hand = Some(item);
                //             self.packet_out
                //                 .push_back(PacketC::TakeItem { item, player: pid })
                //         }
                //         Out::Put => {
                //             info!("put");
                //             let hand = player.hand.take().unwrap();
                //             tile.items.push(hand);
                //             self.packet_out
                //                 .push_back(PacketC::PutItem { item: hand, pos })
                //         }
                //         Out::Produce(kind) => {
                //             info!("produce");
                //             let id = self.item_id_counter;
                //             self.item_id_counter += 1;
                //             self.items.insert(id, kind);
                //             tile.items.push(id);
                //             self.packet_out
                //                 .push_back(PacketC::ProduceItem { id, pos, kind });
                //         }
                //         Out::Consume(index) => {
                //             info!("consume");
                //             let id = tile.items.remove(index);
                //             info!("left {:?}", tile.items);
                //             self.packet_out.push_back(PacketC::ConsumeItem { id, pos });
                //         }
                //         Out::SetActive(progress) => {
                //             self.packet_out.push_back(PacketC::SetActive {
                //                 tile: pos,
                //                 progress,
                //             });
                //         }
                //     },
                // );

                player.interacting = edge;
            }
            PacketS::Collide { player, force } => {}
        }
        Ok(())
    }

    pub fn tick(&mut self, dt: f32) {
        for (&pos, tile) in &mut self.tiles {
            // let items = tile.items.iter().map(|e| self.items[e]).collect::<Vec<_>>();
            // tick_tile(
            //     dt,
            //     &self.data,
            //     tile.kind,
            //     &mut tile.active,
            //     items,
            //     |out| match out {
            //         Out::Take(_) | Out::Put => {
            //             unreachable!()
            //         }
            //         Out::Produce(kind) => {
            //             info!("produce");
            //             let id = self.item_id_counter;
            //             self.item_id_counter += 1;
            //             self.items.insert(id, kind);
            //             tile.items.push(id);
            //             self.packet_out
            //                 .push_back(PacketC::ProduceItem { id, pos, kind });
            //         }
            //         Out::Consume(index) => {
            //             info!("consume");
            //             let id = tile.items.remove(index);
            //             info!("left {:?}", tile.items);
            //             self.packet_out.push_back(PacketC::ConsumeItem { id, pos });
            //         }
            //         Out::SetActive(progress) => {
            //             self.packet_out.push_back(PacketC::SetActive {
            //                 tile: pos,
            //                 progress,
            //             });
            //         }
            //     },
            // );
        }
    }
}

impl From<TileIndex> for Tile {
    fn from(kind: TileIndex) -> Self {
        Self { kind, item: None }
    }
}