use serde::{Deserialize, Serialize};
use serde_wasm_bindgen::Error;
use tsify::Tsify;
use wasm_bindgen::JsValue;
use wasm_bindgen::prelude::wasm_bindgen;
use crate::board::{CellType, Letter};
use crate::game::{Game, GameState, PlayedTile};
use crate::player_interaction::ai::Difficulty;

#[wasm_bindgen]
pub struct GameWasm(Game);

#[derive(Serialize, Deserialize, Tsify)]
#[tsify(from_wasm_abi)]
pub enum ResponseType {
    OK,
    ERR,
}

#[derive(Serialize, Deserialize, Tsify)]
#[tsify(from_wasm_abi)]
pub struct MyResult<E: Serialize> {
    response_type: ResponseType,
    value: E,
    game_state: Option<GameState>,
}




#[wasm_bindgen]
impl GameWasm {

    #[wasm_bindgen(constructor)]
    pub fn new(seed: u64, dictionary_text: &str, ai_difficulty: JsValue) -> GameWasm {

        let difficulty: Difficulty = serde_wasm_bindgen::from_value(ai_difficulty).unwrap();

        GameWasm(Game::new(seed, dictionary_text, vec!["Player".to_string()], vec![difficulty]))
    }

    pub fn get_tray(&self, name: &str) -> Result<JsValue, Error> {
        let tray = self.0.player_states.get_tray(name);

        serde_wasm_bindgen::to_value(&tray)
    }

    pub fn get_board_cell_types(&self) -> Result<JsValue, Error> {
        let board = self.0.get_board();

        let cell_types: Vec<CellType> = board.cells.iter().map(|cell| -> CellType {
            cell.cell_type.clone()
        }).collect();

        serde_wasm_bindgen::to_value(&cell_types)
    }

    pub fn get_board_letters(&self) -> Result<JsValue, Error> {
        let board = self.0.get_board();

        let letters: Vec<Option<Letter>> = board.cells.iter().map(|cell| -> Option<Letter> {
            cell.value.clone()
        }).collect();

        serde_wasm_bindgen::to_value(&letters)
    }

    pub fn receive_play(&mut self, tray_tile_locations: JsValue, commit_move: bool) -> Result<JsValue, Error> {
        let tray_tile_locations: Vec<Option<PlayedTile>> = serde_wasm_bindgen::from_value(tray_tile_locations)?;

        let result = self.0.receive_play(tray_tile_locations, commit_move);

        match result {
            Ok((x, game_state)) => {
                serde_wasm_bindgen::to_value(&MyResult {
                    response_type: ResponseType::OK,
                    value: x,
                    game_state: Some(game_state)
                })
            },
            Err(e) => {
                serde_wasm_bindgen::to_value(&MyResult {
                    response_type: ResponseType::ERR,
                    value: e,
                    game_state: None,
                })
            }
        }


    }

    pub fn get_scores(&self) -> Result<JsValue, JsValue> {

        #[derive(Serialize, Deserialize, Tsify)]
        #[tsify(from_wasm_abi)]
        pub struct PlayerAndScore {
            name: String,
            score: u32,
        }

        let scores: Vec<PlayerAndScore> = self.0.player_states.0.iter()
            .map(|player_state| {
                PlayerAndScore {
                    name: player_state.player.get_name().to_string(),
                    score: player_state.score,
                }
            })
            .collect();

        Ok(serde_wasm_bindgen::to_value(&scores)?)

    }

    pub fn exchange_tiles(&mut self, tray_tile_locations: JsValue) -> Result<JsValue, Error>{

        let tray_tile_locations: Vec<bool> = serde_wasm_bindgen::from_value(tray_tile_locations)?;

        match self.0.exchange_tiles(tray_tile_locations) {
            Ok((_, turn_action, state)) => {
                serde_wasm_bindgen::to_value(&MyResult {
                    response_type: ResponseType::OK,
                    value: turn_action,
                    game_state: Some(state),
                })
            },
            Err(e) => {
                serde_wasm_bindgen::to_value(&MyResult {
                    response_type: ResponseType::ERR,
                    value: e,
                    game_state: None,
                })
            }
        }


    }

    pub fn add_word(&mut self, word: String) {
        self.0.add_word(word);
    }

    pub fn skip_turn(&mut self) -> Result<JsValue, Error>{
        let result = self.0.pass();
        match result {
            Ok(game_state) => {
                Ok(serde_wasm_bindgen::to_value(&MyResult {
                    response_type: ResponseType::OK,
                    value: "Turn passed",
                    game_state: Some(game_state),
                })?)
            },
            Err(e) => {
                Ok(serde_wasm_bindgen::to_value(&MyResult {
                    response_type: ResponseType::ERR,
                    value: e,
                    game_state: None,
                })?)
            }
        }
    }

    pub fn advance_turn(&mut self) -> Result<JsValue, Error> {
        let result = self.0.advance_turn();

        match result {
            Ok((turn_advance_result, game_state)) => {
                Ok(serde_wasm_bindgen::to_value(&MyResult {
                    response_type: ResponseType::OK,
                    value: turn_advance_result,
                    game_state: Some(game_state),
                })?)
            },
            Err(e) => {
                Ok(serde_wasm_bindgen::to_value(&MyResult {
                    response_type: ResponseType::ERR,
                    value: e,
                    game_state: None,
                })?)
            }
        }


    }

    pub fn get_current_player(&self) -> String {
        self.0.current_player_name()
    }

    pub fn get_remaining_tiles(&self) -> usize {
        self.0.get_remaining_tiles()
    }

    pub fn get_player_tile_count(&self, player: &str) -> Result<JsValue, Error> {
        match self.0.get_player_tile_count(player) {
            Ok(count) => {
                Ok(serde_wasm_bindgen::to_value(&MyResult{
                    response_type: ResponseType::OK,
                    value: count,
                    game_state: None,
                })?)
            },
            Err(msg) => {
                Ok(serde_wasm_bindgen::to_value(&MyResult{
                    response_type: ResponseType::OK,
                    value: msg,
                    game_state: None,
                })?)
            }
        }
    }

}