'use strict'

utils = require 'src/utils'
signal = require 'src/signal'

KEY_CODES = Object.create null
KEY_CODES[Qt.Key_Escape] = 'Escape'
KEY_CODES[Qt.Key_Tab] = 'Tab'
KEY_CODES[Qt.Key_Backspace] = 'Backspace'
KEY_CODES[Qt.Key_Return] = 'Enter'
KEY_CODES[Qt.Key_Enter] = 'Enter'
KEY_CODES[Qt.Key_Insert] = 'Insert'
KEY_CODES[Qt.Key_Delete] = 'Delete'
KEY_CODES[Qt.Key_Pause] = 'Pause'
KEY_CODES[Qt.Key_Home] = 'Home'
KEY_CODES[Qt.Key_End] = 'End'
KEY_CODES[Qt.Key_Left] = 'Left'
KEY_CODES[Qt.Key_Up] = 'Up'
KEY_CODES[Qt.Key_Right] = 'Right'
KEY_CODES[Qt.Key_Down] = 'Down'
KEY_CODES[Qt.Key_PageUp] = 'Page Up'
KEY_CODES[Qt.Key_PageDown] = 'Page Down'
KEY_CODES[Qt.Key_Shift] = 'Shift'
KEY_CODES[Qt.Key_Control] = 'Control'
KEY_CODES[Qt.Key_Meta] = 'Meta'
KEY_CODES[Qt.Key_Alt] = 'Alt'
KEY_CODES[Qt.Key_AltGr] = 'Alt'
KEY_CODES[Qt.Key_CapsLock] = 'Caps Lock'
KEY_CODES[Qt.Key_NumLock] = 'Num Lock'
KEY_CODES[Qt.Key_ScrollLock] = 'Scroll Lock'
KEY_CODES[Qt.Key_F1] = 'F1'
KEY_CODES[Qt.Key_F2] = 'F2'
KEY_CODES[Qt.Key_F3] = 'F3'
KEY_CODES[Qt.Key_F4] = 'F4'
KEY_CODES[Qt.Key_F5] = 'F5'
KEY_CODES[Qt.Key_F6] = 'F6'
KEY_CODES[Qt.Key_F7] = 'F7'
KEY_CODES[Qt.Key_F8] = 'F8'
KEY_CODES[Qt.Key_F9] = 'F9'
KEY_CODES[Qt.Key_F10] = 'F10'
KEY_CODES[Qt.Key_F11] = 'F11'
KEY_CODES[Qt.Key_F12] = 'F12'
KEY_CODES[Qt.Key_Menu] = 'Menu'
KEY_CODES[Qt.Key_Space] = 'Space'
KEY_CODES[Qt.Key_0] = '0'
KEY_CODES[Qt.Key_1] = '1'
KEY_CODES[Qt.Key_2] = '2'
KEY_CODES[Qt.Key_3] = '3'
KEY_CODES[Qt.Key_4] = '4'
KEY_CODES[Qt.Key_5] = '5'
KEY_CODES[Qt.Key_6] = '6'
KEY_CODES[Qt.Key_7] = '7'
KEY_CODES[Qt.Key_8] = '8'
KEY_CODES[Qt.Key_9] = '9'
KEY_CODES[Qt.Key_A] = 'A'
KEY_CODES[Qt.Key_B] = 'B'
KEY_CODES[Qt.Key_C] = 'C'
KEY_CODES[Qt.Key_D] = 'D'
KEY_CODES[Qt.Key_E] = 'E'
KEY_CODES[Qt.Key_F] = 'F'
KEY_CODES[Qt.Key_G] = 'G'
KEY_CODES[Qt.Key_H] = 'H'
KEY_CODES[Qt.Key_I] = 'I'
KEY_CODES[Qt.Key_J] = 'J'
KEY_CODES[Qt.Key_K] = 'K'
KEY_CODES[Qt.Key_L] = 'L'
KEY_CODES[Qt.Key_M] = 'M'
KEY_CODES[Qt.Key_N] = 'N'
KEY_CODES[Qt.Key_O] = 'O'
KEY_CODES[Qt.Key_P] = 'P'
KEY_CODES[Qt.Key_Q] = 'Q'
KEY_CODES[Qt.Key_R] = 'R'
KEY_CODES[Qt.Key_S] = 'S'
KEY_CODES[Qt.Key_T] = 'T'
KEY_CODES[Qt.Key_U] = 'U'
KEY_CODES[Qt.Key_V] = 'V'
KEY_CODES[Qt.Key_W] = 'W'
KEY_CODES[Qt.Key_X] = 'X'
KEY_CODES[Qt.Key_Y] = 'Y'
KEY_CODES[Qt.Key_Z] = 'Z'

pressedKeys = Object.create null

SIGNALS =
    'keysOnPress': 'onPressed'
    'keysOnHold': 'onPressed'
    'keysOnRelease': 'onReleased'
    'keysOnInput': 'onPressed'

SIGNALS_ARGS =
    'keysOnPress': (e) ->
        if pressedKeys[e.key] and pressedKeys[e.key] isnt e
            return false
        pressedKeys[e.key] = e
        key: KEY_CODES[e.key] || e.text.toUpperCase()
    'keysOnHold': (e) ->
        key: KEY_CODES[e.key] || e.text.toUpperCase()
    'keysOnRelease': (e) ->
        pressedKeys[e.key] = null
        key: KEY_CODES[e.key] || e.text.toUpperCase()
    'keysOnInput': (e) ->
        text: e.text

module.exports = (impl) ->
    DATA = utils.merge
        elem: null
        linkUri: ''
        linkUriListens: false
        bindings: null
        anchors: null
    , impl.pointer.DATA

    exports =
    DATA: DATA

    createData: impl.utils.createDataCloner DATA

    create: (data) ->
        data.elem ?= impl.utils.createQmlObject 'Item {}'

    setItemParent: (val) ->
        @_impl.elem.parent = val?._impl.elem or __stylesHatchery or null

    setItemVisible: (val) ->
        @_impl.elem.visible = val

    setItemClip: (val) ->
        @_impl.elem.clip = val

    setItemWidth: (val) ->
        @_impl.elem.width = val

    setItemHeight: (val) ->
        @_impl.elem.height = val

    setItemX: (val) ->
        @_impl.elem.x = val

    setItemY: (val) ->
        @_impl.elem.y = val

    setItemZ: (val) ->
        @_impl.elem.z = val

    setItemScale: (val) ->
        @_impl.elem.scale = val

    setItemRotation: (val) ->
        @_impl.elem.rotation = impl.utils.radToDeg val

    setItemOpacity: (val) ->
        @_impl.elem.opacity = val

    setItemLinkUri: do ->
        onLinkUriClicked = ->
            {linkUri} = @_impl
            if linkUri
                if ///^([a-z]+:)///.test linkUri
                    Qt.openUrlExternally linkUri
                else
                    __location.append linkUri
                signal.STOP_PROPAGATION

        (val) ->
            @_impl.linkUri = val

            unless @_impl.linkUriListens
                @_impl.linkUriListens = true
                @pointer.onClick onLinkUriClicked, @
            return

    attachItemSignal: do ->
        attachKeys = (ns, name, uniqueName, qmlName) ->
            self = @
            __stylesWindow.Keys[qmlName].connect (e) ->
                arg = SIGNALS_ARGS[uniqueName] e
                if self[name].emit(arg) is signal.STOP_PROPAGATION
                    e.accepted = true
                return
            return

        (ns, name) ->
            if ns is 'pointer'
                impl.pointer.attachItemSignal.call @, name
                return

            uniqueName = ns + utils.capitalize(name)
            unless qmlName = SIGNALS[uniqueName]
                return

            if ns is 'keys'
                attachKeys.call @, ns, name, uniqueName, qmlName