import QtQuick 2.9
import QtQuick.Controls 1.4
import QtQuick.Dialogs 1.2
import QtQuick.Extras 1.2
import Qt.labs.platform 1.1

ApplicationWindow {

    id: app
    visible: false

    property var ctx
    property var loginDone 
    property var allowEmptyPass

    Connections {
        target: jsonModel
        onDataChanged: {
            ctx = JSON.parse(jsonModel.getJson());

            // FIXME -- we need to inform the backend that we've already seen
            // this. Otherwise this keeps popping randonmly on state changes.
            if (ctx.donateDialog == 'true') {
                console.debug(jsonModel.getJson())
                donate.visible = true
            }
            if (ctx.loginDialog == 'true') {
                console.debug(jsonModel.getJson())
                console.debug("DEBUG: should display login")
                login.visible = true
            }
            if (ctx.loginOk == 'true') {
                loginOk.visible = true
            }
            if (ctx.errors ) {
               login.visible = false
               if ( ctx.errors  == "nohelpers" ) {
                   showInitFailure(qsTr("Could not find helpers. Please check your installation"))
               } else if ( ctx.errors == "nopolkit" ) {
                   showInitFailure(qsTr("Could not find polkit agent."))
               } else {
                   showInitFailure()
               }
            }
            if (ctx.donateURL) {
                donateItem.visible = true
            }
        }
    }

    function showInitFailure(msg) {
      console.debug("ERRORS:", ctx.errors)
      if (msg == undefined) {
          if (ctx.errors == 'bad_auth_502' || ctx.errors == 'bad_auth_timeout') {
                  msg = qsTr("Oops! The authentication service seems down. Please try again later")
              initFailure.title = qsTr("Service Error")
          }
          else if (ctx.errors == 'bad_auth') {
              if (allowEmptyPass) {
                  // For now, this is a libraryVPN, so we can be explicit about what credentials are here.
                  // Another option to consider is to customize the error strings while vendoring.
                  msg = qsTr("Please check your Patron ID")
              } else {
                  msg = qsTr("Could not log in with those credentials, please retry")
              }
              initFailure.title = qsTr("Login Error")
          } else {
              //: %1 -> application name
              //: %2 -> error string
              msg = qsTr("Got an error starting %1: %2").arg(ctx.appName).arg(ctx.errors)
          }
      }
      initFailure.text = msg
      initFailure.visible  = true
    }

    function shouldAllowEmptyPass() {
        let obj = JSON.parse(providers.getJson())
        let active = obj['default']
        let allProviders = obj['providers']
        for (let i = 0; i < allProviders.length; i++) {
            if (allProviders[i]['name'] === active) {
                return (allProviders[i]['authEmptyPass'] === 'true')
            }
        }
        return false
    }

    Component.onCompleted: {
        loginDone = false;
        console.debug("Platform:", Qt.platform.os);
        console.debug("DEBUG: Pre-seeded providers:");
        console.debug(providers.getJson());
        allowEmptyPass = shouldAllowEmptyPass();

	/* TODO get appVisible flag from backend */
        app.visible = false;
    }

    function toHuman(st) {
        switch(st) {
            case "off":
		//: %1 -> application name
                return qsTr("%1 off").arg(ctx.appName);
            case "on":
		//: %1 -> application name
                return qsTr("%1 on").arg(ctx.appName);
            case "connecting":
		//: %1 -> application name
                return qsTr("Connecting to %1").arg(ctx.appName);
            case "stopping":
		//: %1 -> application name
                return qsTr("Stopping %1").arg(ctx.appName);
            case "failed":
		//: %1 -> application name
                return qsTr("%1 blocking internet").arg(ctx.appName); // TODO failed is not handed yet
        }
    }

    property var icons: {
        "off":     "qrc:/assets/icon/png/black/vpn_off.png",
        "on":      "qrc:/assets/icon/png/black/vpn_on.png",
        "wait":    "qrc:/assets/icon/png/black/vpn_wait_0.png",
        "blocked": "qrc:/assets/icon/png/black/vpn_blocked.png",
    }
    

    SystemTrayIcon {

        id: systray
        visible: systrayVisible

        onActivated: {
            // this looks like a widget bug. middle click (reasons 3 or 4)
            // produce a segfault when trying to call menu.open()
            // left and right click seem to be working fine, so let's ignore this for now.
            switch (reason) {
            case SystemTrayIcon.Unknown:
	        console.debug("reason: unknown")
                menu.open()
		break
            case SystemTrayIcon.Context:
	        console.debug("activated: context")
		if (Qt.platform.os !== "linux") {
			menu.open()
		}
                break
            case SystemTrayIcon.DoubleClick:
	        console.debug("activated: double click")
		if (Qt.platform.os !== "linux") {
			menu.open()
		}
                break
            case SystemTrayIcon.Trigger:
                break
            case SystemTrayIcon.MiddleClick:
                break
            }
        }

        Component.onCompleted: {
            icon.source = icons["off"]
            tooltip = qsTr("Checking status...")
            console.debug("systray init completed")
            hide();
            if (systrayVisible) {
                show();
            }
        }

        menu: Menu {

            id: systrayMenu

            StateGroup {
                id: vpn
                state: ctx ? ctx.status : ""
            
                states: [
                    State { name: "initializing" },
                    State {
                        name: "off"
                        PropertyChanges { target: systray; tooltip: toHuman("off"); icon.source: icons["off"] }
                        PropertyChanges { target: statusItem; text: toHuman("off") }
                    },
                    State {
                        name: "on"
                        PropertyChanges { target: systray; tooltip: toHuman("on"); icon.source: icons["on"] }
                        PropertyChanges { target: statusItem; text: toHuman("on") }
                    },
                    State {
                        name: "starting"
                        PropertyChanges { target: systray; tooltip: toHuman("connecting"); icon.source: icons["wait"] }
                        PropertyChanges { target: statusItem; text: toHuman("connecting") }
                    },
                    State {
                        name: "stopping"
                        PropertyChanges { target: systray; tooltip: toHuman("stopping"); icon.source: icons["wait"] }
                        PropertyChanges { target: statusItem; text: toHuman("stopping") }
                    },
                    State {
                        name: "failed"
                        PropertyChanges { target: systray; tooltip: toHuman("failed"); icon.source: icons["blocked"] }
                        PropertyChanges { target: statusItem; text: toHuman("failed") }
                    }
                ]
            }

            MenuItem {
                id: statusItem
                text: qsTr("Checking status...")
                enabled: false
            }

            MenuItem {
                text: {
                    if (vpn.state == "failed")
                        qsTr("Reconnect")
                    else
                        qsTr("Turn on")
                }
                onTriggered: {
                    backend.switchOn()
                }
                visible: ctx ? (ctx.status == "off" || ctx.status == "failed") : false
            }

            MenuItem {
                text: {
                    if (ctx && ctx.status == "starting")
                        qsTr("Cancel")
                    else
                        qsTr("Turn off")
                }
                onTriggered: {
                    backend.switchOff()
                }
                visible: ctx ? (ctx.status == "on" || ctx.status == "starting" || ctx.status == "failed") : false
            }

            MenuSeparator {}

            MenuItem {
                text: qsTr("Help...")

                onTriggered: {
                    console.debug(Qt.resolvedUrl(ctx.helpURL));
                    Qt.openUrlExternally(Qt.resolvedUrl(ctx.helpURL))
                }
            }

            MenuItem {
                id: donateItem
                text: qsTr("Donate...")
                visible: ctx ? ctx.donateURL : false
                onTriggered: { donate.visible = true }
            }

            MenuItem {
                text: qsTr("About...")
                onTriggered: { about.visible = true }
            }

            MenuSeparator {}

            MenuItem {
                text: qsTr("Quit")
                onTriggered: backend.quit()
            }
        }
    }

    DonateDialog {
        id: donate
        visible: false
    }

    AboutDialog {
        id: about
        visible: false
    }

    LoginDialog {
        id: login
        visible: false
    }

    LoginOKDialog{
        id: loginOk
        visible: false
    }

    MessageDialog {
        id: errorStartingVPN
        buttons: MessageDialog.Ok
        modality: Qt.NonModal
        title: qsTr("Error starting VPN")
        text: ""
        detailedText: ""
        visible: false
    }

    MessageDialog {
        id: authAgent
        buttons: MessageDialog.Ok
        modality: Qt.NonModal
        title: qsTr("Missing authentication agent")
        text: qsTr("Could not find a polkit authentication agent. Please run one and try again.")
        visible: false
    }

    FailDialog {
        id: initFailure
        visible: false
    }
}