import QtQuick
import QtQuick.Controls
import QtQuick.Layouts
import Qt.labs.qmlmodels
import ISC

Dialog {
    id: root
    title: "Select File"
    width: 980
    height: 640
    modal: true
    padding: 16
    topPadding: 0
    parent: Overlay.overlay
    x: Math.round(((parent ? parent.width : width) - width) / 2)
    y: Math.round(((parent ? parent.height : height) - height) / 2)

    signal fileChosen(string path)

    // ===== Dialog State =====
    property string selectedPath: ""
    property var tableModel: []
    property int selectedRow: -1
    property int metadataEditRow: -1

    function openMetadataEditor(row) {
        metadataEditRow = row;
        const rec = tableModel[row];
        if (!rec) {
            metadataEditDialog.close();
            return;
        }
        waferField.text = rec.wafer ?? "";
        dateField.text = rec.date ?? "";
        chamberField.text = rec.chamber ?? "";
        notesField.text = rec.notes ?? "";
        selectedField.checked = rec.selected ?? false;
        filePathLabel.text = rec.fileName ?? "";
        metadataEditDialog.open();
    }

    function applyMetadataFromEditor() {
        if (metadataEditRow < 0) return;
        const rec = tableModel[metadataEditRow];
        if (!rec) {
            metadataEditDialog.close();
            return;
        }
        file_browser.saveMetadata(rec.fileName ?? "", waferField.text, dateField.text, chamberField.text, notesField.text, selectedField.checked);
        metadataEditDialog.close();
        metadataEditRow = -1;
    }

    readonly property var headerTitles: ["", "Wafer", "Date", "Chamber", "Notes", "File", "Edit", "Save"]
    readonly property var normalizedRows: (tableModel || []).map(function (row) {
        row = row || {};
        return {
            select:    row.selected  ?? false,
            wafer:     row.wafer     ?? "",
            date:      row.date      ?? "",
            chamber:   row.chamber   ?? "",
            edit:      "",
            save:      "",
            notes:     row.notes     ?? "",
            fileName:  row.fileName  ?? "",
            highlight: row.highlight ?? false
        };
    })

    // ===== Reusable Controls =====
    component DialogActionButton: Button {
        id: dialogButton
        hoverEnabled: true
        implicitHeight: 36

        background: Rectangle {
            radius: Theme.radiusSm
            color: dialogButton.down    ? Theme.buttonNeutralPressed
                 : dialogButton.hovered ? Theme.buttonNeutralHover
                                        : Theme.buttonNeutralBackground
            border.width: Theme.borderThin
            border.color: Theme.fieldBorder
        }

        contentItem: Text {
            text: dialogButton.text
            color: Theme.buttonNeutralText
            horizontalAlignment: Text.AlignHCenter
            verticalAlignment: Text.AlignVCenter
            elide: Text.ElideRight
            font.bold: true
            font.pixelSize: 13
        }
    }

    component DialogTextInput: TextField {
        id: dialogTextInput
        color: Theme.fieldText
        placeholderTextColor: Theme.fieldPlaceholder
        selectedTextColor: Theme.fieldBackground
        selectionColor: Theme.fieldText

        background: Rectangle {
            radius: Theme.radiusXs
            color: Theme.fieldBackground
            border.width: dialogTextInput.activeFocus ? Theme.borderStrong : Theme.borderThin
            border.color: dialogTextInput.activeFocus ? Theme.fieldBorderFocus : Theme.fieldBorder
        }
    }

    // ===== Dialog Chrome =====
    background: Rectangle {
        radius: Theme.radiusLg
        color: Theme.panelBackground
        border.color: Theme.outerFrameBorder
        border.width: Theme.borderStrong
    }

    // Custom header — replaces the native dark title bar
    header: Rectangle {
        width: root.width
        height: 48
        radius: Theme.radiusLg
        color: Theme.subtleSectionBackground
        border.color: Theme.innerFrameBorder
        border.width: Theme.borderThin

        // Square off the bottom corners
        Rectangle {
            anchors.left: parent.left
            anchors.right: parent.right
            anchors.bottom: parent.bottom
            height: parent.radius
            color: parent.color
        }

        Label {
            anchors.verticalCenter: parent.verticalCenter
            anchors.left: parent.left
            anchors.leftMargin: 16
            text: root.title
            font.pixelSize: 15
            font.bold: true
            color: Theme.headingColor
        }

        // Close button
        DialogActionButton {
            anchors.verticalCenter: parent.verticalCenter
            anchors.right: parent.right
            anchors.rightMargin: 12
            text: "✕"
            implicitWidth: 32
            implicitHeight: 32
            onClicked: root.close()
        }
    }

    // ===== Content =====
    ColumnLayout {
        anchors.fill: parent
        spacing: 10

        // ===== Browser Toolbar =====
        RowLayout {
            Layout.fillWidth: true
            Layout.topMargin: 12
            spacing: 8

            DialogActionButton {
                text: "Choose Folder"
                Layout.preferredWidth: 140
                onClicked: file_browser.chooseDirectory()
            }

            DialogActionButton {
                text: "Refresh"
                Layout.preferredWidth: 100
                onClicked: file_browser.refreshFiles()
            }

            Rectangle {
                Layout.fillWidth: true
                Layout.preferredHeight: 36
                Layout.minimumWidth: 80
                clip: true
                radius: Theme.radiusXs
                color: Theme.fieldBackground
                border.color: Theme.fieldBorder
                border.width: Theme.borderThin

                Text {
                    anchors.fill: parent
                    anchors.leftMargin: 10
                    anchors.rightMargin: 10
                    verticalAlignment: Text.AlignVCenter
                    text: file_browser.currentDirectory
                    color: Theme.fieldText
                    elide: Text.ElideMiddle
                    font.pixelSize: 13
                }
            }
        }

        // ===== File Table =====
        HorizontalHeaderView {
            id: headerView
            syncView: tableView
            Layout.fillWidth: true

            delegate: Rectangle {
                implicitHeight: 34
                color: Theme.subtleSectionBackground
                border.color: Theme.innerFrameBorder
                border.width: Theme.borderThin

                Text {
                    anchors.centerIn: parent
                    text: root.headerTitles[index] ?? ""
                    font.bold: true
                    font.pixelSize: 12
                    color: Theme.headingColor
                }
            }
        }

        TableView {
            id: tableView
            Layout.fillWidth: true
            Layout.fillHeight: true
            clip: true
            columnSpacing: 0
            rowSpacing: 0
            flickableDirection: Flickable.VerticalFlick

            columnWidthProvider: function (col) {
                // [select, wafer, date, chamber, notes, file (variable), edit, save]
                const fixed = { 0: 40, 1: 90, 2: 170, 3: 120, 4: 180, 6: 56, 7: 56 };
                if (fixed.hasOwnProperty(col)) return fixed[col];
                // col 5 (File) takes remaining width
                const w = Math.max(400, tableView.width);
                const used = 40 + 90 + 170 + 120 + 180 + 56 + 56;
                return Math.max(120, w - used);
            }

            model: TableModel {
                TableModelColumn { display: "select"   }
                TableModelColumn { display: "wafer"    }
                TableModelColumn { display: "date"     }
                TableModelColumn { display: "chamber"  }
                TableModelColumn { display: "notes"    }
                TableModelColumn { display: "fileName" }
                TableModelColumn { display: "edit"     }
                TableModelColumn { display: "save"     }
                rows: root.normalizedRows
            }

            delegate: Rectangle {
                required property bool current
                required property int row
                required property int column

                implicitHeight: 40
                border.color: Theme.softBorder
                border.width: Theme.borderThin
                color: {
                    if (root.selectedRow === row)         return Theme.sideActiveBackground;
                    if (root.tableModel[row]?.highlight)  return Theme.subtleSectionBackground;
                    return row % 2 === 0 ? Theme.cardBackground : Theme.tone100;
                }

                // Checkbox (col 0)
                Loader {
                    anchors.fill: parent
                    active: column === 0
                    sourceComponent: CheckBox {
                        anchors.centerIn: parent
                        checked: root.tableModel[row]?.selected ?? false
                        onCheckedChanged: {
                            if (root.tableModel[row])
                                root.tableModel[row].selected = checked;
                        }
                    }
                }

                // Edit button (col 6)
                Loader {
                    anchors.fill: parent
                    anchors.margins: 4
                    active: column === 6
                    sourceComponent: Button {
                        hoverEnabled: true
                        text: "Edit…"
                        font.pixelSize: 12
                        onClicked: root.openMetadataEditor(row)

                        background: Rectangle {
                            radius: Theme.radiusXs
                            color: parent.down    ? Theme.buttonNeutralPressed
                                 : parent.hovered ? Theme.buttonNeutralHover
                                                  : Theme.buttonNeutralBackground
                            border.width: Theme.borderThin
                            border.color: Theme.fieldBorder
                        }

                        contentItem: Text {
                            text: parent.text
                            color: Theme.buttonNeutralText
                            horizontalAlignment: Text.AlignHCenter
                            verticalAlignment: Text.AlignVCenter
                            font.pixelSize: 12
                        }
                    }
                }

                // Save button (col 7)
                Loader {
                    anchors.fill: parent
                    anchors.margins: 4
                    active: column === 7
                    sourceComponent: Button {
                        hoverEnabled: true
                        text: "Save"
                        font.pixelSize: 12
                        onClicked: {
                            const record = root.tableModel[row];
                            if (!record) return;
                            file_browser.saveMetadata(record.fileName ?? "", record.wafer ?? "", record.date ?? "", record.chamber ?? "", record.notes ?? "", record.selected ?? false);
                        }

                        background: Rectangle {
                            radius: Theme.radiusXs
                            color: parent.down    ? Theme.buttonNeutralPressed
                                 : parent.hovered ? Theme.buttonNeutralHover
                                                  : Theme.buttonNeutralBackground
                            border.width: Theme.borderThin
                            border.color: Theme.fieldBorder
                        }

                        contentItem: Text {
                            text: parent.text
                            color: Theme.buttonNeutralText
                            horizontalAlignment: Text.AlignHCenter
                            verticalAlignment: Text.AlignVCenter
                            font.pixelSize: 12
                        }
                    }
                }

                // Text columns: Wafer (1), Date (2), File (5)
                Loader {
                    anchors.fill: parent
                    active: column === 1 || column === 2 || column === 5
                    sourceComponent: Text {
                        anchors.fill: parent
                        anchors.leftMargin: 8
                        anchors.rightMargin: 8
                        verticalAlignment: Text.AlignVCenter
                        text: {
                            const record = root.tableModel[row] || {};
                            if (column === 1) return record.wafer    ?? "";
                            if (column === 2) return record.date     ?? "";
                            if (column === 5) return record.fileName ?? "";
                            return "";
                        }
                        elide: Text.ElideRight
                        font.pixelSize: 13
                        color: Theme.bodyColor
                    }
                }

                // Text columns: Chamber (3), Notes (4)
                Loader {
                    anchors.fill: parent
                    active: column === 3 || column === 4
                    sourceComponent: Text {
                        anchors.fill: parent
                        anchors.leftMargin: 8
                        anchors.rightMargin: 8
                        verticalAlignment: Text.AlignVCenter
                        text: {
                            const record = root.tableModel[row] || {};
                            if (column === 3) return record.chamber ?? "";
                            return record.notes ?? "";
                        }
                        elide: Text.ElideRight
                        font.pixelSize: 13
                        color: Theme.bodyColor
                    }
                }

                MouseArea {
                    anchors.fill: parent
                    enabled: column !== 0 && column !== 6 && column !== 7
                    onClicked: {
                        root.selectedRow = row;
                        root.selectedPath = root.tableModel[row]?.fileName ?? "";
                    }
                }
            }
        }

        // ===== Bottom Bar =====
        RowLayout {
            Layout.fillWidth: true
            spacing: 8

            DialogActionButton {
                text: "OK"
                Layout.preferredWidth: 90
                onClicked: {
                    root.fileChosen(root.selectedPath);
                    root.close();
                }
            }

            DialogActionButton {
                text: "Cancel"
                Layout.preferredWidth: 90
                onClicked: root.close()
            }

            Rectangle {
                Layout.fillWidth: true
                Layout.preferredHeight: 32
                Layout.minimumWidth: 120
                clip: true
                radius: Theme.radiusXs
                color: Theme.fieldBackground
                border.color: Theme.fieldBorder
                border.width: Theme.borderThin

                Text {
                    anchors.fill: parent
                    anchors.leftMargin: 10
                    anchors.rightMargin: 10
                    verticalAlignment: Text.AlignVCenter
                    text: root.selectedPath
                    elide: Text.ElideLeft
                    font.pixelSize: 13
                    color: root.selectedPath ? Theme.fieldText : Theme.fieldPlaceholder
                }
            }
        }
    }

    // ===== Metadata Editor Dialog =====
    Dialog {
        id: metadataEditDialog
        parent: Overlay.overlay
        modal: true
        title: qsTr("Edit File Information")
        width: 520
        height: 520
        padding: 16
        topPadding: 0
        x: Math.round(((parent ? parent.width : width) - width) / 2)
        y: Math.round(((parent ? parent.height : height) - height) / 2)

        background: Rectangle {
            radius: Theme.radiusLg
            color: Theme.panelBackground
            border.color: Theme.outerFrameBorder
            border.width: Theme.borderStrong
        }

        header: Rectangle {
            width: metadataEditDialog.width
            height: 48
            radius: Theme.radiusLg
            color: Theme.subtleSectionBackground
            border.color: Theme.innerFrameBorder
            border.width: Theme.borderThin

            Rectangle {
                anchors.left: parent.left
                anchors.right: parent.right
                anchors.bottom: parent.bottom
                height: parent.radius
                color: parent.color
            }

            Label {
                anchors.verticalCenter: parent.verticalCenter
                anchors.left: parent.left
                anchors.leftMargin: 16
                text: metadataEditDialog.title
                font.pixelSize: 15
                font.bold: true
                color: Theme.headingColor
            }
        }

        ColumnLayout {
            anchors.fill: parent
            spacing: Theme.settingsGridSpacing

            Label { text: qsTr("File"); font.bold: true; color: Theme.headingColor }

            Text {
                id: filePathLabel
                Layout.fillWidth: true
                Layout.maximumHeight: 56
                wrapMode: Text.WrapAnywhere
                maximumLineCount: 3
                elide: Text.ElideRight
                color: Theme.bodyColor
                font.pixelSize: 12
            }

            Label { text: qsTr("Wafer");   color: Theme.headingColor }
            DialogTextInput { id: waferField;   Layout.fillWidth: true; Layout.preferredHeight: 36 }

            Label { text: qsTr("Date");    color: Theme.headingColor }
            DialogTextInput { id: dateField;    Layout.fillWidth: true; Layout.preferredHeight: 36 }

            Label { text: qsTr("Chamber"); color: Theme.headingColor }
            DialogTextInput { id: chamberField; Layout.fillWidth: true; Layout.preferredHeight: 36 }

            Label { text: qsTr("Notes");   color: Theme.headingColor }
            DialogTextInput { id: notesField;   Layout.fillWidth: true; Layout.preferredHeight: 36 }

            CheckBox {
                id: selectedField
                text: qsTr("Selected for processing")
            }

            RowLayout {
                Layout.fillWidth: true
                Layout.topMargin: 8
                spacing: 8

                Item { Layout.fillWidth: true }

                DialogActionButton {
                    text: qsTr("Cancel")
                    Layout.preferredWidth: 90
                    onClicked: {
                        root.metadataEditRow = -1;
                        metadataEditDialog.close();
                    }
                }

                DialogActionButton {
                    text: qsTr("Save")
                    Layout.preferredWidth: 90
                    onClicked: root.applyMetadataFromEditor()
                }
            }
        }
    }
}