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// Copyright (C) 2026 Danilo M. <danix@danix.xyz>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

import QtQuick
import "../.."
import "Hypr.js" as H

// One row per option: its name, its value (in the accent when it differs
// from Hyprland's default, colours as swatches), and what it does. Filters
// for everything, what the config sets, and what differs from the default.
// Clicking a row opens it: the whole description, the default and range,
// and an editor shaped by the type: true/false and an enum's names as
// choices, anything else as a Lua expression started from the value.
Column {
    id: page

    required property QtObject mod
    property string filter: "all"
    property string query: ""
    property string editing: ""
    property string draft: ""
    property string error: ""
    property bool busy: false

    spacing: 10

    readonly property var all: page.mod.descs.map(d => {
        const o = page.mod.values[d.name];
        return { d: d, o: o, set: !!(o && o.set), changed: H.changed(d, o), over: page.mod.overridden.includes(d.name) };
    })
    readonly property int setCount: page.all.filter(r => r.set).length
    readonly property int changedCount: page.all.filter(r => r.changed).length
    readonly property var shown: {
        const q = page.query.trim().toLowerCase();
        return page.all.filter(r => (page.filter === "all" || (page.filter === "set" ? r.set : r.changed))
            && (q === "" || r.d.name.toLowerCase().includes(q) || r.d.description.toLowerCase().includes(q)));
    }

    function toggle(r) {
        page.error = "";
        if (page.editing === r.d.name) { page.editing = ""; return; }
        page.editing = r.d.name;
        page.draft = r.o ? H.lua(r.o) : "";
    }

    function apply(name, expr) {
        if (page.busy) return;
        page.busy = true;
        page.error = "";
        page.mod.set(name, expr, err => {
            page.busy = false;
            page.error = err;
            if (err === "") page.draft = expr;
        });
    }

    component Small: Text {
        color: Theme.subtext
        font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 4 }
        elide: Text.ElideRight
    }

    component OptionRow: Column {
        id: or
        required property var row
        readonly property bool open: page.editing === or.row.d.name
        readonly property string kind: H.kind(or.row.o)
        readonly property var choices: or.kind === "bool"
            ? [{ name: "true", v: true }, { name: "false", v: false }]
            : or.kind === "int" ? H.choices(or.row.d) : []
        objectName: "opt:" + or.row.d.name
        width: page.width
        spacing: 6

        Item {
            width: parent.width
            height: 30

            Rectangle {
                anchors.fill: parent
                radius: 6
                color: rowArea.containsMouse || or.open ? Qt.alpha(Theme.accent, 0.12) : "transparent"
            }

            Text {
                x: 8
                width: parent.width * 0.36 - 16
                anchors.verticalCenter: parent.verticalCenter
                elide: Text.ElideRight
                textFormat: Text.StyledText
                // The section faded, the option itself bright.
                readonly property int cut: or.row.d.name.lastIndexOf(":") + 1
                text: "<font color='" + Theme.subtext + "'>" + or.row.d.name.slice(0, cut) + "</font>" + or.row.d.name.slice(cut)
                color: Theme.text
                font { family: Theme.iconFamily; pixelSize: Theme.fontSize - 3 }
            }

            Row {
                x: parent.width * 0.36
                width: parent.width * 0.26 - 12
                anchors.verticalCenter: parent.verticalCenter
                spacing: 4
                clip: true
                Repeater {
                    model: H.colors(or.row.o)
                    Rectangle {
                        required property string modelData
                        anchors.verticalCenter: parent.verticalCenter
                        width: 10; height: 10; radius: 2
                        color: modelData
                    }
                }
                Text {
                    text: H.show(or.row.d, or.row.o)
                    color: or.row.changed ? Theme.accent : Theme.subtext
                    font { family: Theme.iconFamily; pixelSize: Theme.fontSize - 3; bold: or.row.changed }
                }
            }

            Small {
                x: parent.width * 0.62
                width: parent.width * 0.38 - 8
                anchors.verticalCenter: parent.verticalCenter
                text: (or.row.over ? "● " : "") + or.row.d.description
            }

            MouseArea {
                id: rowArea
                anchors.fill: parent
                hoverEnabled: true
                cursorShape: Qt.PointingHandCursor
                onClicked: page.toggle(or.row)
            }
        }

        Column {
            visible: or.open
            x: 8
            width: parent.width - 16
            spacing: 6
            bottomPadding: 8

            Text {
                width: parent.width
                wrapMode: Text.Wrap
                text: or.row.d.description
                color: Theme.text
                font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 3 }
            }
            Small {
                width: parent.width
                wrapMode: Text.Wrap
                text: "Default " + H.show(or.row.d, { [or.kind || "str"]: or.row.d.default })
                    + (or.row.d.min !== undefined && or.row.d.min !== null ? ", from " + or.row.d.min + " to " + or.row.d.max : "")
                    + (or.row.over ? ". Set by keystone.lua."
                       : or.row.set ? ". Set in your config: a change here overrides it from keystone.lua." : ".")
            }

            // true/false, or an enum's names.
            Flow {
                visible: or.choices.length > 0
                width: parent.width
                spacing: 6
                Repeater {
                    model: or.choices
                    Chip {
                        required property var modelData
                        text: modelData.name
                        selected: or.row.o && or.row.o[or.kind] === modelData.v
                        onClicked: if (!selected) page.apply(or.row.d.name, String(modelData.v))
                    }
                }
            }

            Item {
                visible: or.choices.length === 0 && or.kind !== ""
                width: parent.width
                height: 32
                Field {
                    anchors { left: parent.left; right: applyBtn.left; rightMargin: 8 }
                    mono: true
                    text: page.draft
                    onEdited: t => page.draft = t
                    onAccepted: page.apply(or.row.d.name, page.draft)
                }
                Button {
                    id: applyBtn
                    anchors { right: parent.right; verticalCenter: parent.verticalCenter }
                    text: page.busy ? "Checking…" : "Apply"
                    enabled: !page.busy && page.draft.trim() !== ""
                    onClicked: page.apply(or.row.d.name, page.draft)
                }
            }

            Small {
                width: parent.width
                visible: page.error !== ""
                wrapMode: Text.Wrap
                color: Theme.red
                text: page.error
            }

            Button {
                visible: or.row.over
                text: "Reset, drop the keystone.lua line"
                onClicked: page.mod.reset(or.row.d.name)
            }
        }
    }

    Small {
        width: parent.width
        wrapMode: Text.Wrap
        text: page.all.length + " options, live from Hyprland. Your config sets " + page.setCount + ", and "
            + page.changedCount + " differ from the default. Click one to see more, or change it."
    }

    Item {
        width: parent.width
        height: 32
        Field {
            id: search
            width: parent.width * 0.3
            text: page.query
            placeholder: "Search options"
            onEdited: t => page.query = t
        }
        Row {
            anchors { left: search.right; leftMargin: 12; verticalCenter: parent.verticalCenter }
            spacing: 6
            Chip { text: "Everything · " + page.all.length; selected: page.filter === "all"; onClicked: page.filter = "all" }
            Chip { text: "Set in your config · " + page.setCount; selected: page.filter === "set"; onClicked: page.filter = "set" }
            Chip { text: "Changed from default · " + page.changedCount; selected: page.filter === "changed"; onClicked: page.filter = "changed" }
        }
    }

    Item {
        width: parent.width
        height: 20
        Small { x: 8; text: "Option" }
        Small { x: parent.width * 0.36; text: "Value" }
        Small { x: parent.width * 0.62; text: "What it does" }
    }

    Repeater {
        model: page.shown
        OptionRow {
            required property var modelData
            row: modelData
        }
    }

    Small {
        width: parent.width
        wrapMode: Text.Wrap
        text: "Values in the accent differ from Hyprland's default; faded ones are the default. Colours show as swatches. "
            + "● marks an option set from this page, in sections/keystone.lua."
    }
}