import Clutter from 'gi://Clutter';
import GObject from 'gi://GObject';
import Pango from 'gi://Pango';
import St from 'gi://St';

import * as ModalDialog from 'resource:///org/gnome/shell/ui/modalDialog.js';
import * as PopupMenu from 'resource:///org/gnome/shell/ui/popupMenu.js';

import {SAVED_CONNECTOR_PROPERTY, escapeRegex} from './display-config.js';

export const CaptureDialog = GObject.registerClass(
class CaptureDialog extends ModalDialog.ModalDialog {
    _init(profileNames, monitors, scaleGroups, logicalDisplayCount, textScalingFactor, onResponse) {
        super._init({destroyOnClose: false});
        this._onResponse = onResponse;

        const box = new St.BoxLayout({
            vertical: true,
            style_class: 'prompt-dialog-main-layout',
            style: 'width: 38em; spacing: 18px;',
        });
        box.add_child(this._wrappedLabel(
            'Save Display Profile', 'headline'));
        box.add_child(this._wrappedLabel(
            'Choose how connected displays are matched, then save a new profile or replace an existing one.',
            'description'));

        const matchingSection = this._section('Display Matching');
        matchingSection.add_child(this._wrappedLabel(
            'Enabled fields must match. Each value is an editable regular expression.',
            'description'));
        this._monitorFields = [];
        this._monitorConnectors = [];
        monitors.forEach((monitor, index) => this._addMonitorFields(matchingSection, monitor, index));
        box.add_child(matchingSection);

        const settingsSection = this._section('Display Settings');
        settingsSection.add_child(this._wrappedLabel(
            scaleGroups.length === 1 && scaleGroups[0].logicalMonitorIndexes.length > 1
                ? 'This session requires one display scale for all connected displays.'
                : 'Display scale controls the size of everything on an individual display.',
            'description'));
        this._logicalDisplayCount = logicalDisplayCount;
        this._scaleStates = [];
        const scaleRows = new St.BoxLayout({
            vertical: true,
            style_class: 'popup-menu-content',
            style: 'spacing: 2px;',
        });
        scaleGroups.forEach(display => this._addDisplayScale(scaleRows, display));
        settingsSection.add_child(scaleRows);
        box.add_child(settingsSection);

        const profileSection = this._section('Profile');
        const profileColumns = new St.BoxLayout({x_expand: true, style: 'spacing: 18px;'});
        const newProfileColumn = new St.BoxLayout({vertical: true, x_expand: true, style: 'spacing: 8px;'});
        newProfileColumn.add_child(this._wrappedLabel('New Profile', 'headline'));
        this._nameEntry = new St.Entry({
            text: `Profile ${profileNames.length + 1}`,
            hint_text: 'Profile Name',
            can_focus: true,
            x_expand: true,
        });
        this._newProfileName = this._nameEntry.get_text();
        this._nameEntry.clutter_text.connect('text-changed', () => {
            if (this._selectedProfileName === null)
                this._newProfileName = this._nameEntry.get_text();
        });
        this._nameEntry.clutter_text.connect('activate', () => this._respond());
        newProfileColumn.add_child(this._nameEntry);
        newProfileColumn.add_child(this._wrappedLabel('Interface Text Scale', 'description'));
        this._textScaleEntry = new St.Entry({
            text: textScalingFactor.toFixed(2),
            hint_text: '1.00',
            can_focus: true,
            x_expand: true,
        });
        newProfileColumn.add_child(this._textScaleEntry);
        profileColumns.add_child(newProfileColumn);

        const overwriteColumn = new St.BoxLayout({vertical: true, x_expand: true, style: 'spacing: 8px;'});
        overwriteColumn.add_child(this._wrappedLabel('Or Overwrite Existing Profile', 'headline'));
        this._selectedProfileName = null;
        this._profileItems = new Map();
        const profileChoices = new St.BoxLayout({
            vertical: true,
            style_class: 'popup-menu-content',
            style: 'spacing: 2px;',
        });
        if (profileNames.length) {
            this._addProfileChoice(profileChoices, null, 'Do Not Overwrite');
            profileNames.forEach(profileName =>
                this._addProfileChoice(profileChoices, profileName, profileName));
        } else {
            profileChoices.add_child(new PopupMenu.PopupMenuItem(
                'No Profiles Available', {reactive: false}));
        }
        overwriteColumn.add_child(profileChoices);
        profileColumns.add_child(overwriteColumn);
        profileSection.add_child(profileColumns);
        box.add_child(profileSection);
        this.contentLayout.add_child(box);

        this.setButtons([
            {
                label: 'Cancel',
                action: () => this.close(),
                key: Clutter.KEY_Escape,
            },
            {
                label: 'Save',
                default: true,
                action: () => this._respond(),
            },
        ]);

        this.connect('opened', () => this._nameEntry.grab_key_focus());
    }

    _wrappedLabel(text, styleClass) {
        const label = new St.Label({text, style_class: styleClass, x_expand: true});
        label.clutter_text.set_line_wrap(true);
        label.clutter_text.set_line_wrap_mode(Pango.WrapMode.WORD_CHAR);
        label.clutter_text.ellipsize = Pango.EllipsizeMode.NONE;
        return label;
    }

    _section(title) {
        const section = new St.BoxLayout({vertical: true, style: 'spacing: 8px;'});
        section.add_child(this._wrappedLabel(title, 'headline'));
        return section;
    }

    _addMonitorFields(box, monitor, index) {
        const fields = new Map();
        this._monitorFields.push(fields);
        this._monitorConnectors.push(monitor.connector);
        box.add_child(this._wrappedLabel(
            `Display ${index + 1} — ${monitor.vendor} ${monitor.product} (${monitor.connector})`,
            'headline'));
        const rows = new St.BoxLayout({
            vertical: true,
            style_class: 'popup-menu-content',
            style: 'spacing: 2px;',
        });
        this._addField(rows, fields, 'connector', 'Connector / Port', monitor.connector, true);
        this._addField(rows, fields, 'vendor', 'Vendor', monitor.vendor, true);
        this._addField(rows, fields, 'product', 'Model', monitor.product, true);
        this._addField(rows, fields, 'serial', 'Serial Number', monitor.serial, false);
        box.add_child(rows);
    }

    _addField(box, fields, field, label, value, enabled) {
        const row = new St.BoxLayout({x_expand: true, style: 'spacing: 12px;'});
        const item = new PopupMenu.PopupSwitchMenuItem(label, enabled);
        item.x_expand = false;
        item.style = 'width: 12em;';
        const entry = new St.Entry({
            text: escapeRegex(value),
            can_focus: true,
            x_expand: true,
            hint_text: 'Regular expression',
        });
        const setEnabled = isEnabled => {
            fields.get(field).enabled = isEnabled;
            entry.reactive = isEnabled;
            entry.can_focus = isEnabled;
            if (isEnabled)
                entry.remove_style_pseudo_class('insensitive');
            else
                entry.add_style_pseudo_class('insensitive');
        };
        item.connect('toggled', (_item, isEnabled) => setEnabled(isEnabled));
        fields.set(field, {enabled, entry});
        setEnabled(enabled);
        row.add_child(item);
        row.add_child(entry);
        box.add_child(row);
    }

    _addDisplayScale(box, display) {
        const row = new St.BoxLayout({
            x_expand: true,
            style: 'spacing: 12px;',
        });
        const label = new St.Label({
            text: `${display.name}${display.primary ? ' — Primary' : ''}`,
            x_expand: true,
            y_align: Clutter.ActorAlign.CENTER,
        });
        const state = {value: display.scale};
        const choices = new St.BoxLayout({style: 'spacing: 4px;'});
        const buttons = [];
        display.supportedScales.forEach(scale => {
            const button = new St.Button({
                label: this._formatScale(scale),
                style_class: 'button',
                toggle_mode: true,
                checked: Math.abs(scale - display.scale) < 0.001,
                can_focus: true,
            });
            button.connect('clicked', () => {
                state.value = scale;
                for (const candidate of buttons)
                    candidate.checked = candidate === button;
            });
            buttons.push(button);
            choices.add_child(button);
        });
        state.logicalMonitorIndexes = display.logicalMonitorIndexes;
        this._scaleStates.push(state);
        row.add_child(label);
        row.add_child(choices);
        box.add_child(row);
    }

    _formatScale(scale) {
        return `${Math.round(scale * 100)}%`;
    }

    _addProfileChoice(box, profileName, label) {
        const item = new PopupMenu.PopupMenuItem(label);
        item.connect('activate', () => this._selectProfile(profileName));
        item.setOrnament(profileName === null ? PopupMenu.Ornament.DOT : PopupMenu.Ornament.NONE);
        this._profileItems.set(profileName, item);
        box.add_child(item);
    }

    _selectProfile(profileName) {
        const previousProfileName = this._selectedProfileName;
        this._selectedProfileName = profileName;
        for (const [name, item] of this._profileItems)
            item.setOrnament(name === profileName ? PopupMenu.Ornament.DOT : PopupMenu.Ornament.NONE);

        if (profileName === null) {
            if (previousProfileName !== null)
                this._nameEntry.set_text(this._newProfileName);
            this._nameEntry.reactive = true;
            this._nameEntry.can_focus = true;
            this._nameEntry.remove_style_pseudo_class('insensitive');
            this._nameEntry.grab_key_focus();
            return;
        }

        if (previousProfileName === null)
            this._newProfileName = this._nameEntry.get_text();
        this._nameEntry.set_text(profileName);
        this._nameEntry.reactive = false;
        this._nameEntry.can_focus = false;
        this._nameEntry.add_style_pseudo_class('insensitive');
    }

    _respond() {
        const rules = this._monitorFields.map((fields, index) => ({
            ...Object.fromEntries([...fields].filter(([, state]) => state.enabled)
                .map(([field, state]) => [field, state.entry.get_text().trim()])),
            [SAVED_CONNECTOR_PROPERTY]: this._monitorConnectors[index],
        }));
        const displayScales = Array(this._logicalDisplayCount);
        for (const state of this._scaleStates) {
            for (const index of state.logicalMonitorIndexes)
                displayScales[index] = state.value;
        }
        this.close();
        this._onResponse({
            rules,
            name: this._selectedProfileName ?? this._nameEntry.get_text().trim(),
            overwrite: this._selectedProfileName !== null,
            textScalingFactor: Number(this._textScaleEntry.get_text()),
            displayScales,
        });
    }
});