/* table_editor, par Sébastien L. 2021-11-12
 */

/*****************************/
/* Mise en place des données */
/*****************************/
let lastX;
let lastY;

function build_table(data) {
    let output = "";
    let sumsUE = {};
    let sumsRessources = {};

    data.forEach((cellule) => {
        output += `
            <div 
                class="${cellule.style || ""}"
                data-editable="${cellule.editable || "false"}"
                data-module_id="${cellule.module_id}"
                data-ue_id="${cellule.ue_id}"
                data-x="${cellule.x}"
                data-y="${cellule.y}"
                data-nbX="${cellule.nbX || 1}"
                data-nbY="${cellule.nbY || 1}"
                data-data="${cellule.data}"
                data-orig="${cellule.data}"
                title="${cellule.title || ""}"
                style="
                    --x:${cellule.x};
                    --y:${cellule.y};
                    --nbX:${cellule.nbX || 1};
                    --nbY: ${cellule.nbY || 1};
                ">
                ${cellule.data}
            </div>`;

        if (cellule.editable && cellule.data) {
            sumsRessources[cellule.y] = (sumsRessources[cellule.y] ?? 0) + parseInt(cellule.data);
            sumsUE[cellule.x] = (sumsUE[cellule.x] ?? 0) + parseInt(cellule.data);
        }
    })

    output += showSums(sumsRessources, sumsUE);
    document.querySelector(".tableau").innerHTML = output;
    installListeners();
}

function showSums(sumsRessources, sumsUE) {
    lastX = Object.keys(sumsUE).length + 2;
    lastY = Object.keys(sumsRessources).length + 2;

    let output = "";

    Object.entries(sumsUE).forEach(([num, value]) => {
        output += `
            <div 
                class="sums"
                data-editable="false"
                data-x="${num}"
                data-y="${lastY}"
                style="
                    --x:${num};
                    --y:${lastY};
                    --nbX:1;
                    --nbY:1;
                ">
                ${value}
            </div>`;
    })

    Object.entries(sumsRessources).forEach(([num, value]) => {
        output += `
            <div 
                class="sums"
                data-editable="false"
                data-x="${lastX}"
                data-y="${num}"
                style="
                    --x:${lastX};
                    --y:${num};
                    --nbX:1;
                    --nbY:1;
                ">
                ${value}
            </div>`;
    })

    return output;
}

/*****************************/
/* Gestion des évènements    */
/*****************************/

function installListeners() {
    if (read_only) {
        return;
    }
    document.body.addEventListener("keydown", key);
    document.querySelectorAll("[data-editable=true]").forEach(cellule => {
        cellule.addEventListener("click", function () { selectCell(this) });
        cellule.addEventListener("dblclick", function () { modifCell(this) });
        cellule.addEventListener("blur", function () {
            let currentModif = document.querySelector(".modifying");
            if (currentModif) {
                if (!save(currentModif)) {
                    return;
                }
            }
        });
        cellule.addEventListener("input", processSums);
    });
}


/*********************************/
/* Interaction avec les cellules */
/*********************************/
function selectCell(obj) {
    if (obj.classList.contains("modifying")) {
        return; // Cellule en cours de modification, ne pas sélectionner.
    }
    let currentModif = document.querySelector(".modifying");
    if (currentModif) {
        if (!save(currentModif)) {
            return;
        }
    }

    document.querySelectorAll(".selected, .modifying").forEach(cellule => {
        cellule.classList.remove("selected", "modifying");
        cellule.removeAttribute("contentEditable");
        cellule.removeEventListener("keydown", keyCell);
    })
    obj.classList.add("selected");
}

function modifCell(obj) {
    if (obj) {
        obj.classList.add("modifying");
        obj.contentEditable = true;
        obj.addEventListener("keydown", keyCell);
        obj.focus();
    }
}

function key(event) {
    switch (event.key) {
        case "Enter": modifCell(document.querySelector(".selected")); event.preventDefault(); break;
        case "ArrowRight": ArrowMove(1, 0); break;
        case "ArrowLeft": ArrowMove(-1, 0); break;
        case "ArrowUp": ArrowMove(0, -1); break;
        case "ArrowDown": ArrowMove(0, 1); break;
    }
}

function ArrowMove(x, y) {
    if (document.querySelector(".modifying") || !document.querySelector(".selected")) {
        return;	// S'il n'y a aucune cellule selectionnée ou si une cellule est encours de modification, on ne change pas
    }

    let selected = document.querySelector(".selected");
    let next = document.querySelector(`[data-x="${parseInt(selected.dataset.x) + x}"][data-y="${parseInt(selected.dataset.y) + y}"][data-editable="true"]`);

    if (next) {
        selectCell(next);
    }
}

function keyCell(event) {
    if (event.key == "Enter") {
        event.preventDefault();
        event.stopPropagation();
        if (!save(this)) {
            return
        }
        this.classList.remove("modifying");
        let selected = document.querySelector(".selected");
        ArrowMove(0, 1);
        if(selected != document.querySelector(".selected")){
            modifCell(document.querySelector(".selected"));
        }  
    }
}

function processSums() {
    let sum = 0;
    document.querySelectorAll(`[data-editable="true"][data-x="${this.dataset.x}"]`).forEach(e => {
        sum += parseInt(e.innerText) || 0;
    })
    document.querySelector(`.sums[data-x="${this.dataset.x}"][data-y="${lastY}"]`).innerText = sum;

    sum = 0;
    document.querySelectorAll(`[data-editable="true"][data-y="${this.dataset.y}"]`).forEach(e => {
        sum += parseInt(e.innerText) || 0;
    })
    document.querySelector(`.sums[data-x="${lastX}"][data-y="${this.dataset.y}"]`).innerText = sum;
}

/******************************/
/* Affichage d'un message     */
/******************************/
function message(msg) {
    var div = document.createElement("div");
    div.className = "message";
    div.innerHTML = msg;
    document.querySelector("body").appendChild(div);
    setTimeout(() => {
        div.remove();
    }, 3000);
}