// Four segments saying how much a password has going for it.
//
// The score is computed here, from length and which character classes appear,
// and from nothing else. There is no dictionary, no breach list and no network
// call, so the row claims exactly what it can back up: it is headed "Strength"
// and says in its own detail line that it only measures shape. A meter that
// says "Strong" about a leaked password is worse than no meter, so this one
// never uses that word.

import QtQuick
import qs.config

SettingRow {
    id: root

    property string password: ""

    readonly property int score: {
        const value = root.password;
        if (value === "")
            return 0;

        let classes = 0;
        if (/[a-z]/.test(value))
            classes += 1;
        if (/[A-Z]/.test(value))
            classes += 1;
        if (/[0-9]/.test(value))
            classes += 1;
        if (/[^A-Za-z0-9]/.test(value))
            classes += 1;

        let points = Math.max(0, classes - 1);
        if (value.length >= 8)
            points += 1;
        if (value.length >= 12)
            points += 1;
        if (value.length >= 16)
            points += 1;

        if (value.length < 8)
            return 1;
        return Math.max(1, Math.min(4, points));
    }

    readonly property color tone: {
        if (root.score <= 1)
            return Theme.danger;
        if (root.score === 2)
            return Theme.warn;
        return Theme.ok;
    }

    label: "Strength"
    detail: "Length and variety of characters, measured here — nothing is sent anywhere, and nothing is checked against known passwords"
    controlWidth: 150

    Row {
        anchors.right: parent.right
        anchors.verticalCenter: parent.verticalCenter
        spacing: 5

        Repeater {
            model: 4

            delegate: Rectangle {
                required property int index

                width: 32
                height: 5
                radius: 2.5
                color: index < root.score ? root.tone : Theme.alpha(Theme.fg, 0.12)
                border.width: 0
            }
        }
    }
}