var gui = require('gui');
var fs = require('fs');
const { waitForAddAccountWindow } = require('./waitForAddAccountWindow');
const { waitForDataEntryWindow } = require('./waitForDataEntryWindow');
const { waitForCloseAccountWindow } = require('./waitForCloseAccountWindow');
const { getAccounts, toListViewEntries, getSummation } = require('./utils');
const { waitForChartWindow } = require('./waitForChartWindow');

function mainWindow(projectData) {

    var rh = 14;
    var sp = 4;
    var y = sp;

    let internalProjectData = projectData;

    let invalidate = false;

    let gadgets = [];

    const cycleId = 1;
    const listViewId = 2;
    const balanceId = 3;
    const addButtonId = 4;

    cols = 56;

    gadgets.push({
        kind: 'cycle', id: cycleId,
        left: sp, top: y, width: 120, height: rh, border: false,
        items: getAccounts(internalProjectData), value: 0
    });

    gadgets.push({
        kind: 'button', id: addButtonId,
        left: -(sp + 80),
        top: y,
        width: 80,
        label: "+Transfer",
        height: rh
    });

    gadgets.push({
        kind: 'listview', id: listViewId,
        left: sp,
        top: y + rh + sp,
        width: 500 - sp - sp,
        height: 186,
        items: toListViewEntries(internalProjectData[0].entries, cols),
        value: 0
    });

    gadgets.push({
        kind: 'text', id: balanceId,
        label: 'Balance:',
        left: 100,
        top: -(sp + rh),
        width: 400 - sp,
        height: rh,
        value: getSummation(internalProjectData[0].entries).toFixed(2)
    });

    let win = gui.createWindow({
        title: 'Budget',
        width: 500,
        height: 14 + 4 + 4 + 200 + 4,
        left: 20,
        top: 15,
        gadgets: gadgets,
    });

    /* Set up menu bar */
    gui.setMenu(win, [
        {
            title: 'Project',
            items: [
                { label: 'New', id: 101, key: 'N' },
                { label: 'Open...', id: 102, key: 'O' },
                { label: 'Save...', id: 103, key: 'S' },
                { label: '---' },
                { label: 'Quit', id: 199, key: 'Q' }
            ]
        },
        {
            title: 'Accounts',
            items: [
                { label: "Add...", id: 104, key: 'A' },
                { label: "Close...", id: 105, key: 'C' }
            ]
        },
        {
            title: 'Charts',
            items: [
                { label: "---" },
                { label: "New", id: 106 }
            ]
        }
    ]);

    let currentAccountIndex = 0;

    let updateView = (accountIndex, data) => {
        if (accountIndex != null) {
            gui.set(win, cycleId, getAccounts(data));
            gui.set(win, cycleId, accountIndex);
        } else {
            accountIndex = gui.get(win, cycleId);
        }
        // sort
        data[accountIndex].entries = data[accountIndex].entries.sort((a, b) => a.date - b.date);
        gui.set(win, 2, toListViewEntries(data[accountIndex].entries, cols));
        gui.set(win, 3, getSummation(data[accountIndex].entries).toFixed(2));
    }

    let doNew = () => {
        return [
            {
                name: "Current",
                entries: []
            }
        ];
    }

    let doOpen = () => {
        var r = gui.fileRequest({ title: 'Open File', pattern: '#?.json' });
        if (r) {
            return JSON.parse(fs.readFileSync(r.file));
        }
    }

    let doSave = () => {
        var r = gui.fileRequest({ title: 'Save File', pattern: '#?.json', save: true });
        if (r) {
            fs.writeFileSync(r.file, JSON.stringify(internalProjectData));
        }
    }

    gui.setMenuItem(win, 105, { disabled: internalProjectData.length <= 1 });


    while (!invalidate) {
        var evt = gui.waitEvent(win);
        if (!evt) continue;

        if (evt.type === 'close') {
            invalidate = true;
            internalProjectData = null;
        }

        if (evt.type === 'menu') {
            if (evt.id === 101) {
                internalProjectData = doNew();
                updateView(0, internalProjectData);
            }
            else if (evt.id === 102) {
                internalProjectData = doOpen();
                updateView(0, internalProjectData);
            }
            else if (evt.id === 103) {
                doSave();
            }
            else if (evt.id === 104) {
                let indexOfNewAccount = waitForAddAccountWindow(internalProjectData);
                if (indexOfNewAccount > -1) {
                    currentAccountIndex = indexOfNewAccount;
                }
                updateView(currentAccountIndex, internalProjectData);
            }
            else if (evt.id === 105) {
                if (internalProjectData.length > 1) {
                    const rValue = waitForCloseAccountWindow(internalProjectData, internalProjectData[currentAccountIndex]);
                    if (rValue === -1) {
                        internalProjectData.splice(currentAccountIndex, 1);
                        updateView(0, internalProjectData);
                    }
                } else {
                    gui.alert("Cannot close last remaining Account");
                }
            }
            else if (evt.id === 106) {
                waitForChartWindow(projectData[currentAccountIndex]);
            }
            else if (evt.id === 199) {
                invalidate = true;
                internalProjectData = null;
            }
        }

        if (evt.type === 'gadgetup') {

            if (evt.id === cycleId) {
                currentAccountIndex = evt.code;
                updateView(null, internalProjectData);
            } else if (evt.id === listViewId) {
                let selectedEntry = evt.code;
                const entry = waitForDataEntryWindow(internalProjectData[currentAccountIndex].entries[evt.code], internalProjectData);
                if (entry != null) {
                    console.log(entry);
                    if (entry === -1) {
                        console.log(selectedEntry);
                        internalProjectData[currentAccountIndex].entries.splice(selectedEntry, 1);
                    } else {
                        internalProjectData[currentAccountIndex].entries[selectedEntry] = entry;
                    }
                    if (entry.targetAccount) {
                        const targetAccount = internalProjectData.find(d => d.name === entry.targetAccount);
                        if (targetAccount) {
                            targetAccount.entries.push({
                                date: entry.date,
                                subject: "(" + internalProjectData[currentAccountIndex].name + ")" + entry.subject,
                                amount: -entry.amount
                            });
                        }
                    }

                    updateView(currentAccountIndex, internalProjectData);
                }
            } else if (evt.id === addButtonId) {
                const entry = waitForDataEntryWindow(null, internalProjectData);
                if (entry != null) {
                    internalProjectData[currentAccountIndex].entries.push(entry);

                    if (entry.targetAccount) {
                        const targetAccount = internalProjectData.find(d => d.name === entry.targetAccount);
                        if (targetAccount) {
                            targetAccount.entries.push({
                                date: entry.date,
                                subject: "(" + internalProjectData[currentAccountIndex].name + ")" + entry.subject,
                                amount: -entry.amount
                            });
                        }
                    }
                    updateView(currentAccountIndex, internalProjectData);
                }
            }
        }
    };


    gui.closeWindow(win);
}


let projectData = [
    { "name": "Current", "entries": [
        { "date": 1704067200000, "subject": "Salary", "amount": 2182.15000000000009 }, 
        { "date": 1704153600000, "subject": "(Savings) Initial Deposit", "targetAccount": "Current", "amount": -500 }, 
        { "date": 1704240000000, "subject": "Rent", "amount": -800 }, 
        { "date": 1704326400000, "subject": "Groceries", "amount": -24.19 }] 
    }, 
    { "name": "Savings", "entries": [
        { "date": 1704153600000, "subject": "Initial Deposit", "amount": 500 }] 
    }
];

exports.projectData = projectData;


mainWindow(projectData);