import QtQuick
import QtQuick.Controls
import QtQuick.Layouts
import QtQuick.Dialogs

ApplicationWindow {
    id: root
    visible: true
    width: 800
    height: 600
    title: qsTr("LocalSend")
    
    property string currentSessionId: ""
    property var currentFiles: []
    property string currentSenderAlias: ""
    property string currentSenderIp: ""
    property var receiveProgress: ({})

    StackView {
        id: stackView
        anchors.fill: parent
        
        Component.onCompleted: {
            push(homePageComponent)
        }
    }
    
    Dialog {
        id: receiveDialog
        anchors.centerIn: parent
        modal: true
        closePolicy: Popup.NoAutoClose
        standardButtons: Dialog.Ok | Dialog.Cancel
        title: qsTr("Receive Files")
        
        onAccepted: {
            appController.acceptReceive(currentSessionId)
            currentSessionId = ""
        }
        
        onRejected: {
            appController.declineReceive(currentSessionId)
            currentSessionId = ""
        }
        
        ColumnLayout {
            spacing: 12
            
            Label {
                text: qsTr("From: %1 (%2)").arg(currentSenderAlias).arg(currentSenderIp)
                font.bold: true
            }
            
            Label {
                text: qsTr("Files:")
            }
            
            ListView {
                Layout.fillWidth: true
                Layout.preferredHeight: Math.min(200, contentHeight)
                width: 400
                model: currentFiles
                spacing: 4
                
                delegate: RowLayout {
                    width: ListView.view.width
                    spacing: 8
                    
                    Label {
                        text: modelData.fileName
                        Layout.fillWidth: true
                        elide: Text.ElideMiddle
                    }
                    Label {
                        text: formatSize(modelData.size)
                        color: "gray"
                    }
                }
            }
            
            Label {
                text: qsTr("Save to: %1").arg(appController.downloadPath)
                color: palette.mid
                font.pixelSize: 12
            }
        }
    }
    
    Dialog {
        id: progressDialog
        anchors.centerIn: parent
        modal: true
        closePolicy: Popup.NoAutoClose
        title: qsTr("Receiving Files")
        
        ColumnLayout {
            spacing: 12
            
            Label {
                id: progressLabel
                text: qsTr("Receiving from %1...").arg(currentSenderAlias)
            }
            
            ProgressBar {
                id: totalProgressBar
                Layout.fillWidth: true
                from: 0
                to: 100
                value: calculateTotalProgress()
            }
            
            Label {
                text: qsTr("%1% complete").arg(Math.round(totalProgressBar.value))
                color: "gray"
            }
        }
        
        property var progressData: ({})
    }
    
    Connections {
        target: appController
        
        function onReceiveRequest(sessionId, senderAlias, senderIp, files) {
            currentSessionId = sessionId
            currentSenderAlias = senderAlias
            currentSenderIp = senderIp
            currentFiles = files
            
            if (appController.quickSave) {
                appController.acceptReceive(sessionId)
            } else {
                receiveDialog.open()
            }
        }
        
        function onReceiveProgress(sessionId, fileId, progress) {
            if (sessionId === currentSessionId) {
                receiveProgress[fileId] = progress
                receiveProgress = Object.assign({}, receiveProgress)
                progressDialog.progressData = receiveProgress
            }
        }
        
        function onReceiveCompleted(sessionId) {
            if (sessionId === currentSessionId) {
                progressDialog.close()
                receiveProgress = {}
                currentSessionId = ""
            }
        }
        
        function onReceiveError(sessionId, error) {
            if (sessionId === currentSessionId) {
                progressDialog.close()
                errorDialog.text = error
                errorDialog.open()
            }
        }
    }
    
    Dialog {
        id: errorDialog
        anchors.centerIn: parent
        modal: true
        standardButtons: Dialog.Ok
        title: qsTr("Error")
        property alias text: errorLabel.text
        
        Label {
            id: errorLabel
        }
    }
    
    function formatSize(bytes) {
        if (bytes < 1024) return bytes + " B"
        if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + " KB"
        if (bytes < 1024 * 1024 * 1024) return (bytes / (1024 * 1024)).toFixed(1) + " MB"
        return (bytes / (1024 * 1024 * 1024)).toFixed(2) + " GB"
    }
    
    function calculateTotalProgress() {
        if (!currentFiles || currentFiles.length === 0) return 0
        var total = 0
        var count = 0
        for (var i = 0; i < currentFiles.length; i++) {
            var fileId = currentFiles[i].id
            if (receiveProgress[fileId] !== undefined) {
                total += receiveProgress[fileId] * 100
                count++
            }
        }
        return count > 0 ? total / currentFiles.length : 0
    }
    
    Component {
        id: homePageComponent
        Page {
            id: homePage
            
            signal openSettings()
            
            header: ToolBar {
                RowLayout {
                    anchors.fill: parent
                    Label {
                        text: qsTr("LocalSend")
                        font.bold: true
                        font.pixelSize: 20
                        Layout.leftMargin: 16
                    }
                    Item { Layout.fillWidth: true }
                    ToolButton {
                        text: qsTr("Settings")
                        onClicked: homePage.openSettings()
                    }
                }
            }
            
            ColumnLayout {
                anchors.fill: parent
                anchors.margins: 16
                spacing: 16
                
                Label {
                    text: qsTr("Nearby Devices")
                    font.bold: true
                    font.pixelSize: 16
                }
                
                ListView {
                    id: deviceListView
                    Layout.fillWidth: true
                    Layout.fillHeight: true
                    
                    property var devices: appController.devices
                    model: devices
                    spacing: 8
                    
                    delegate: Pane {
                        width: ListView.view.width
                        padding: 12
                        
                        background: Rectangle {
                            color: Qt.lighter("gray", 1.8)
                            radius: 8
                        }
                        
                        RowLayout {
                            anchors.fill: parent
                            
                            Column {
                                Layout.fillWidth: true
                                Label {
                                    text: modelData.alias || modelData.ip
                                    font.bold: true
                                }
                                Label {
                                    text: "%1:%2".arg(modelData.ip).arg(modelData.port)
                                    color: "gray"
                                    font.pixelSize: 12
                                }
                            }
                            
                            Button {
                                text: qsTr("Send")
                                onClicked: {
                                    // TODO: send to this device
                                }
                            }
                        }
                    }
                }
                
                RowLayout {
                    Layout.fillWidth: true
                    Button {
                        text: qsTr("Refresh")
                        onClicked: appController.refreshDevices()
                    }
                    Item { Layout.fillWidth: true }
                    Label {
                        text: qsTr("Alias: %1").arg(appController.alias)
                        color: palette.mid
                    }
                }
            }
            
            onOpenSettings: stackView.push(settingsPageComponent)
        }
    }
    
    Component {
        id: settingsPageComponent
        Page {
            id: settingsPage
            signal back()
            
            header: ToolBar {
                RowLayout {
                    anchors.fill: parent
                    ToolButton {
                        text: qsTr("Back")
                        onClicked: settingsPage.back()
                    }
                    Label {
                        text: qsTr("Settings")
                        font.bold: true
                        Layout.fillWidth: true
                        Layout.leftMargin: 16
                    }
                }
            }
            
            ColumnLayout {
                anchors.fill: parent
                anchors.margins: 16
                spacing: 16
                
                GridLayout {
                    columns: 2
                    Layout.fillWidth: true
                    
                    Label { text: qsTr("Device Alias:") }
                    TextField {
                        id: aliasField
                        text: appController.alias
                        onEditingFinished: appController.alias = text
                        Layout.fillWidth: true
                    }
                    
                    Label { text: qsTr("Port:") }
                    SpinBox {
                        id: portField
                        value: appController.port
                        from: 1
                        to: 65535
                        onValueChanged: appController.port = value
                    }
                    
                    Label { text: qsTr("Download Path:") }
                    RowLayout {
                        Layout.fillWidth: true
                        TextField {
                            id: downloadPathField
                            text: appController.downloadPath
                            onEditingFinished: appController.downloadPath = text
                            Layout.fillWidth: true
                        }
                        Button {
                            text: qsTr("Browse")
                            onClicked: folderDialog.open()
                        }
                    }
                    
                    Label { text: qsTr("Quick Save:") }
                    CheckBox {
                        id: quickSaveCheck
                        checked: appController.quickSave
                        onCheckedChanged: appController.quickSave = checked
                    }
                }
                
                FolderDialog {
                    id: folderDialog
                    onAccepted: {
                        downloadPathField.text = selectedFolder.toString().replace("file://", "")
                        appController.downloadPath = downloadPathField.text
                    }
                }
                
                Item { Layout.fillHeight: true }
                
                Label {
                    text: qsTr("Server Status: %1").arg(appController.serverRunning ? qsTr("Running") : qsTr("Stopped"))
                    color: appController.serverRunning ? "green" : "red"
                }
            }
            
            onBack: stackView.pop()
        }
    }
}