import { createRoot } from "react-dom/client";
import { createElement as h, createContext, Fragment, useReducer, useState } from 'react';
import { css, cx } from '@emotion/css';
import { html } from 'htm';

import N from "./n.js";
import Pivot from "./pivot.js";

import CSV from "../data/csv.json" assert { type: "json" };
let columnNames = CSV.shift();
let columnTypes = ([...columnNames]).fill("hidden");
columnTypes[29] = "sum";
columnTypes[30] = "sum";
columnTypes[31] = "sum";
columnTypes[32] = "sum";
columnTypes[33] = "sum";
columnTypes[7 ] = "label";
columnTypes[8 ] = "label";
columnTypes[9 ] = "label";
columnTypes[10] = "label";
columnTypes[11] = "label";
Pivot.Init(
    columnTypes,
    columnNames,
    CSV
);

let PivotForm = props =>
{
    let styles = css`
        position:realtive;
        box-sizing: border-box;
        padding: 10px;
        color:black;
        font-family:sans-serif;

        .Title
        {
            font-size:24px;
            font-weight:100;
        }

        .Section
        {
            padding:10px 0 10px 0;

            .Heading
            {
                display:inline-block;
                color:#666;
                font-family:sans-serif;
                font-size:12px;
                font-weight:900;
                text-transform:uppercase;
            }
            .Group
            {
                display:inline-block;
                padding:5px;
                border-radius:5px;
                margin:3px;
                background:rgba(0, 0, 0, 0.3)
            }
        }
    `;


    let pivotColumns = N.Step(Pivot.Schema, "label")||[];
    let pivotColumnsUsed = N.Step(Pivot.Proto, "used-pivot")||[];

    let sumColumns = N.Step(Pivot.Schema, "sum")||[];
    //let sumColumnsUsed = N.Step(Pivot.Proto, "used-sum")||[];

    let indiciesPivot = pivotColumnsUsed.map(node=>node.Meta.Index);
    let indiciesSum = sumColumns.map(node=>node.Meta.Index);
    //let indiciesSum = sumColumnsUsed.map(node=>node.Meta.Index);
    
    let displayPivotsAll = html`
    <div class="Section">
        <div class="Heading">Available Columns</div>
        <div class="Group">
        ${pivotColumns.map( columnPivot =>
        {
            let attributes = {};
            if(N.Step(columnPivot, "used-pivot", false))
            {
                attributes.disabled = true;
            }
            else
            {
                attributes.onClick = e=>
                {
                    N.Connect(Pivot.Proto, columnPivot, "used-pivot");
                    Render();
                }
            }
            return html`<button ...${attributes}>${columnPivot.Meta.Label}</button>`;
        })}
        </div>
    </div>
    `;

    let displayPivotsPending = null;
    if(pivotColumnsUsed.length)
    {
        displayPivotsPending  = html`
        <div class="Section">
            <div class="Heading">Pending Pivot</div>
            <div class="Group">
                ${pivotColumnsUsed.map(columnPivot=>html`
                <button onClick=${e=>{N.Disconnect(Pivot.Proto, columnPivot, "used-pivot");Render();}}>
                    ${columnPivot.Meta.Label}
                </button>
                `)}
            </div>

            <button onClick=${e=>{
                N.Disconnect(Pivot.Proto, null, "used-pivot");
                N.Disconnect(Pivot.Proto, null, "used-sum");
                Pivot.Create(pivotColumnsUsed.map(column=>column.Meta.Label).join("|"), indiciesPivot, indiciesSum);
                Render();
            }}>Create</button>
        </div>
        `;
    }

    return html`
    <div class=${styles}>
        <div class="Title">Create New Pivot</div>
        ${displayPivotsAll}
        ${displayPivotsPending}
    </div>
    `;
}

let Section = props =>
{
    let styles = css`
        .Heading
        {
            padding:6px 0 6px 0;
            color:#666;
            font-weight:900;
            font-size:12px;
            text-transform:uppercase;
            cursor:pointer;

            span
            {
                display:inline-block;
                width:20px;
                height:20px;
                margin-right:10px;
                border-radius:20px;
                background:black;
                color:white;
                text-align:center;
            }
        }
        .Heading:hover
        {
            color:black;
        }
        .Body
        {
            position:relative;
            padding:10px 0 20px 30px;
            &::before
            {
                content: " ";
                display:block;
                position:absolute;
                top:-8px;
                left:8px;
                width:3px;
                height:100%;
                background:black;
            }
        }
    `;

    let [openGet, openSet] = useState(false);
    return html`
        <div class=${styles}>
            <div class="Heading" onClick=${e=>openSet(!openGet)}>
                <span>${openGet ? `−` : `+`}</span>
                ${props.label}
            </div>
            ${ openGet ? html`<div class="Body">${props.children}</div>` : null }
        </div>
    `;
}

let ModificationsIcon = ({node}) =>
{
    let modsUp   = N.Step(node, "ModifyUp",   false)||[];
    let modsDown = N.Step(node, "ModifyDown", false)||[];
    let modsAt   = N.Step(node, "ModifyAt",   false)||[];
    let modsOut  = N.Step(node, "ModifyOut",  false)||[];

    var button = null;
    if(modsAt.length)
    {
        button = html`<button onClick=${e=>{Pivot.Unmodify(modsAt[0]); Render();}}>-</button>`;
    } 
    else
    {
        button = html`<button onClick=${e=>{Pivot.Modify(node); Render();}}>+</button>`;
    }

    let padding = 7;
    let icon = 0;
    let styles = css`
        position:relative;
        display:inline-block;
        vertical-align:middle;
        width:${padding*2 + icon}px;
        height:${padding*2 + icon}px;
        margin:${padding*2};
        .Icon
        {
            position:absolute;
            display:inline-block;
            width:${padding*2 + icon}px;
            height:${padding*2 + icon}px;
            text-align:center;
            font-size:9px;
            font-family:sans-serif;
            font-weight:900;
            line-height:${padding*2 + icon}px;

            &::after
            {
                content:" ";
                display:block;
                position:absolute;
                width:${icon}px;
                height:${icon}px;
                border:${padding}px solid transparent;
            }

            &.Down
            {
                left:0;
                bottom:100%;
                &::after
                {
                    top:100%;
                    border-top-color:green;
                    border-bottom:0px solid transparent;
                }
            }
            &.At
            {
                top:0;
                left:100%;
                &::after
                {
                    top:0;
                    right:100%;
                    border-right-color:red;
                    border-left:0px solid transparent;
                }
            }
            &.Up
            {
                left:0;
                top:100%;
                &::after
                {
                    bottom:100%;
                    border-bottom-color:orange;
                    border-top:0px solid transparent;
                }
            }

            &.Out
            {
                top:0;
                right:100%;
                &::after
                {
                    top:0;
                    left:100%;
                    border-left-color:grey;
                    border-right:0px solid transparent;
                }
            }
        }

    `;

    return html`
    <div class=${styles}>
        ${modsDown.length ? html`<div class="Icon Down">${modsDown.length}</div>` : null}
        ${modsAt.length ? html`<span class="Icon At">${modsAt.length}</span>` : null}
        ${modsUp.length ? html`<span class="Icon Up">${modsUp.length}</span>` : null}
        ${modsOut.length ? html`<span class="Icon Out">${modsOut.length}</span>` : null}
    </div>
    ${button}
    `;

};

let PivotBranch = props =>
{
    let row = props.node.Meta.Row;
    let displayCellsModify = row.map(column=>false);
    props.node.Meta.IndexSum.forEach(i=>
    {
        displayCellsModify[i] = html`<td><input type="number" value=${row[i]}/></td>`;
    });
    displayCellsModify.forEach((cell, i)=>
    {
        if(!cell)
        {
            displayCellsModify[i] = html`<td>${row[i]}</td>`
        }
    });

    let displayCells = (node, visible) =>
    {
        let output = [];
        node.Meta.Row.forEach((column, i)=>
        {
            if(visible[i])
            {
                output.push( h("td", null, column) );
            }
        }
        );
        return output;
    }

    let stylesLeaf = css`
        background:#ddd;
        color:#333;
    `;

    return html`
    <tbody>
        <tr>
            <td>
                <strong class=${css`margin-left:${props.node.Meta.Depth*10}px;`}>${props.node.Meta.Label}</strong>
            </td>
            <td>
                <${ModificationsIcon} node=${props.node}><//>
            </td>
            ${displayCells(props.node, props.visible)}
        </tr>
        ${(N.Step(props.node, "Leaf")||[]).map(leaf =>
        {
            return html`
            <tr class=${stylesLeaf}>
                <td></td>
                <td><${ModificationsIcon} node=${leaf}><//></td>
                ${displayCells(leaf, props.visible)}
            </tr>
            `;
        }
        )}
    </tbody>
    `;
};

let PivotRoot = ({pivot}) =>
{
    let labelsDefault = (N.Step(Pivot.Schema, "hidden")||[]).map(column => column.Meta.Index);
    let labelsSum = (N.Step(Pivot.Schema, "sum")||[]).map(column => column.Meta.Index);
    let labelsPivot = (N.Step(Pivot.Schema, "label")||[]).map(column => column.Meta.Index);
    let labelsAll = (N.Step(Pivot.Schema, "all")||[]).map(column => column.Meta.Label);

    let labelsAllState = useState(labelsAll.map(column=>true))

    let headersDisplay = [];
    labelsAllState[0].forEach((visible, index)=>
    {
        if(visible)
        {
            headersDisplay.push(html`<th>${labelsAll[index]}</th>`);
        }
    }
    );

    let stylesRoot = css`
        display:block;
        box-sizing:border-box;
        padding:15px;
        font-family:sans-serif;
    `;
    let stylesHeading = css`
        margin: 0 0 15px 0;
        font-weight:0;
        font-size:24px;
    `;

    let modifiers = N.Step(pivot, "ModifyUp", false) || [];
    let handleDelete = ()=>
    {
        Pivot.Delete(pivot);
        Render();
    };


    let displayColumnGroup = (inAllLabels, inAllState, inIndicies) =>
    {
        return html`
        <div>
            <button onClick=${e=>
            {
                let clone = [...inAllState[0]];
                inIndicies.forEach(index =>clone[index] = true);
                inAllState[1](clone);
            }
            }>Show All</button>
            <button onClick=${e=>
            {
                let clone = [...inAllState[0]];
                inIndicies.forEach(index =>clone[index] = false);
                inAllState[1](clone);
            }
            }>Hide All</button>
        </div>
        <div>
            ${inIndicies.map((index) => html`<button onClick=${e=>
            {
                let clone = [...inAllState[0]];
                clone[index] = !clone[index];
                inAllState[1](clone);
            }
            }>${inAllLabels[index]} ${inAllState[0][index] ? `visible`:`hidden`}</button>`)}
        </div>`;
    };

    let rows = [];
    N.ID.Walk++;
    N.Walk(n=>rows.push(h(PivotBranch, {node:n, visible:labelsAllState[0]}, null)), pivot, "Hierarchy");

    return html`
    <div class=${stylesRoot}>
        <div key="heading" class=${stylesHeading}>${pivot.Meta.Label}</div>
        <${Section} key="settings" label=${`Settings`}>
            <button onClick=${handleDelete}>Destroy Pivot</button>
        <//>
        <${Section} key="columns" label="Columns">
            <h3>Unused</h3>
            ${displayColumnGroup(labelsAll, labelsAllState, labelsDefault)}
            <h3>Summation</h3>
            ${displayColumnGroup(labelsAll, labelsAllState, labelsSum)}
            <h3>Pivot</h3>
            ${displayColumnGroup(labelsAll, labelsAllState, labelsPivot)}
        <//>
        <${Section} key="tree" label=${"Tree"}>
            <table>
                <thead>
                    <tr>
                        <th>Label</th><th>Modifications</th>${headersDisplay}
                    </th>
                </thead>
                ${rows}
            </table>
        <//>
    </div>
    `;
};

let ElRoot = props =>
{
    let pivots = N.Step(Pivot.Root, "Pivot")||[];
    return h("div", null, [
        h(PivotForm),
        pivots.map(pivot=>h(PivotRoot, {key:pivot.Meta.Label, pivot}))
    ])
};

const Root = createRoot(document.querySelector("#app"));
const Render = () => Root.render(h(ElRoot));
Render();