import {addNTimes, PlayableLetterData} from "./utils";
import {useEffect, useState} from "react";
import {Modal} from "./Modal";
import {Letter as LetterData} from "../../pkg/word_grid";
import * as React from "react";

export function TileExchangeModal(props: {
    playerLetters: PlayableLetterData[],
    isOpen: boolean,
    setOpen: (isOpen: boolean) => void,
    exchangeFunction: (selectedArray: Array<boolean>) => void
}) {

    function clearExchangeTiles() {
        const array: boolean[] = [];
        addNTimes(array, false, props.playerLetters.length);
        return array;
    }

    const [tilesToExchange, setTilesToExchange] = useState<boolean[]>(clearExchangeTiles);
    useEffect(() => {
        setTilesToExchange(clearExchangeTiles());
    }, [props.playerLetters])

    let tilesExchangedSelected = 0;
    for (let i of tilesToExchange) {
        if(i) {
            tilesExchangedSelected++;
        }
    }

    return <Modal isOpen={props.isOpen} setOpen={(isOpen) => {
        setTilesToExchange(clearExchangeTiles());
        props.setOpen(isOpen);
    }}>
        <div className="tile-exchange-dialog">
            <div className="instructions">
                Click on each tile you'd like to exchange. You currently have {tilesExchangedSelected} tiles selected.
            </div>
            <div className="selection-buttons">
                <button onClick={() => {
                    const array: boolean[] = [];
                    addNTimes(array, true, props.playerLetters.length);
                    setTilesToExchange(array);
                }}>Select All</button>
                <button onClick={() => {
                    setTilesToExchange(clearExchangeTiles());
                }}>Select None</button>
            </div>

            <TilesExchangedTray
                tray={props.playerLetters}
                selectedArray={tilesToExchange}
                setSelectedArray={setTilesToExchange}
                trayLength={props.playerLetters.length}
            />
            <div className="finish-buttons">
                <button onClick={() => {
                    setTilesToExchange(clearExchangeTiles());
                    props.setOpen(false);
                }}>Cancel</button>
                <button disabled = {tilesExchangedSelected == 0} onClick={() => {
                    props.exchangeFunction(tilesToExchange);
                    props.setOpen(false);
                }}>Exchange</button>
            </div>
        </div>
    </Modal>;

}

function TilesExchangedTray(props: {
    tray: Array<PlayableLetterData>,
    trayLength: number,
    selectedArray: Array<boolean>,
    setSelectedArray: (x: Array<boolean>) => void,
}){

    const divContent = [];
    for(let i=0; i<props.trayLength; i++) {
        divContent.push(<span key={i} />); // empty tile elements
    }

    for(let i = 0; i<props.trayLength; i++){
        const tileData = props.tray[i];

        const toggleFunction = () => {
            props.selectedArray[i] = !props.selectedArray[i];
            props.setSelectedArray(props.selectedArray.slice());
        }

        if(tileData != null){
            divContent[tileData.index] =
                <DummyExchangeTile key={tileData.index} letter={tileData} isSelected={props.selectedArray[i]} onClick={toggleFunction}/>;

        }
    }

    return <div className="tray-container">
        <div className="tray">
            {divContent}
        </div>
    </div>;

}

function DummyExchangeTile(props: {
    letter: LetterData,
    isSelected: boolean,
    onClick: () => void,
}){

    let textClassName = "text";
    if(props.letter.is_blank) {
        textClassName += " prev-blank";
    }

    let letterClassName = "letter";
    if(props.isSelected){
        letterClassName += ' selected-tile';
    }


    return <div className={letterClassName} onClick={props.onClick}>
        <div className={textClassName}>{props.letter.text}</div>
        <div className="letter-points">{props.letter.points}</div>
    </div>;
}