import QtQuick

import QtQuick.Controls

import QtQuick.Layouts

import QtQuick.Shapes

Window {

  id: control

  width: 1024

  height: 768

  visible: true

  title: qsTr("Map Templates")

  property bool hasError: false

  Page {

    id: page

    anchors.fill: parent

    Rectangle {

      id: mapContainer

      property int spaceForCode: Math.max(250, parent.height * 0.6)

      property int mapWidth: 2048

      property int mapHeight: 1024

      property real aspectRatio: mapWidth / mapHeight

      property bool fitWidth: aspectRatio > (parent.width / (parent.height - spaceForCode))

      implicitWidth: fitWidth ? parent.width : (parent.height - spaceForCode) * aspectRatio

      implicitHeight: fitWidth ? parent.width / aspectRatio : (parent.height - spaceForCode)

      x: (parent.width - width) / 2

      border.width: 2

      border.color: hasError ? "red" : "black"

    }

    Shape {

      id: shape

      anchors.fill: mapContainer

    }

    MouseArea {

      id: mouseArea

      anchors.fill: mapContainer

      hoverEnabled: true

    }

    Label {

      text: mouseArea.containsMouse ? "(%1, %2)".arg(Math.floor(mouseArea.mouseX / mouseArea.width * mapContainer.mapWidth)).arg(Math.floor(mouseArea.mouseY / mouseArea.height * mapContainer.mapHeight)) : ""

    }

    Rectangle {

      anchors.fill: codeInput

      color: "gray"

    }

    TextEdit {

      id: codeInput

      anchors.bottom: parent.bottom

      anchors.left: parent.left

      anchors.right: parent.right

      height: parent.height - mapContainer.height

      text: "  -

    width: 3072

    height: 1424

    can_flip: false

    can_invert: false

    can_mirror: true

    is_negative: false

    put_girders: true

    max_hedgehogs: 18

    outline_points:

      -

        - {x: 748, y: 1424, w: 1, h: 1}

        - {x: 636, y: 1252, w: 208, h: 72}

        - {x: 898, y: 1110, w: 308, h: 60}

        - {x: 1128, y: 1252, w: 434, h: 40}

        - {x: 1574, y: 1112, w: 332, h: 40}

        - {x: 1802, y: 1238, w: 226, h: 36}

        - {x: 1930, y: 1424, w: 1, h: 1}

      -

        - {x: 2060, y: 898, w: 111, h: 111}

        - {x: 1670, y: 876, w: 34, h: 102}

        - {x: 1082, y: 814, w: 284, h: 132}

        - {x: 630, y: 728, w: 126, h: 168}

        - {x: 810, y: 574, w: 114, h: 100}

        - {x: 1190, y: 572, w: 352, h: 120}

        - {x: 1674, y: 528, w: 60, h: 240}

        - {x: 1834, y: 622, w: 254, h: 116}

    fill_points:

      - {x: 1423, y: 0}

"

      onTextChanged: {

        const template = parseInput()

        if (template) {

          mapContainer.mapWidth = Number(template.width)

          mapContainer.mapHeight = Number(template.height)

          shape.data = renderTemplate(template)

        }

      }

    }

  }

  function parseInput() {

    let code = codeInput.text.split('\n')

    if(code[0] !== "  -") {

      hasError = true

      return

    }

    code = code.slice(1)

    code.push("")

    let parsed = ({})

    let polygonAccumulator = []

    let pointAccumulator = []

    let key = ""

    code.forEach(line => {

                   let newKey

                   if (line === "    outline_points:") {

                     newKey = "outline_points"

                   }

                   if (line === "    walls:") {

                     newKey = "walls"

                   }

                   if (line === "    fill_points:") {

                     newKey = "fill_points"

                   }

                   if (line === "") {

                     newKey = "_"

                   }

                   if (key === "fill_points" && line.startsWith("      - {")) {

                     // ignore

                     return

                   }

                   if (newKey) {

                     if (key.length > 0) {

                       polygonAccumulator.push(pointAccumulator)

                       parsed[key] = polygonAccumulator

                     }

                     key = newKey

                     polygonAccumulator = []

                     pointAccumulator = []

                     return

                   }

                   if (line === "      -") {

                    if (pointAccumulator.length > 0) {

                       polygonAccumulator.push(pointAccumulator)

                       pointAccumulator = []

                     }

                     return

                   }

                   const matchValue = line.match(/^\s{4}(\w+):\s(.+)$/);

                   if (matchValue) {

                     parsed[matchValue[1]] = matchValue[2]

                     return

                   }

                   const matchPoint = line.match(/^\s{8}-\s\{([^}]+)\}$/);

                   if (matchPoint) {

                    const point = matchPoint[1].split(", ").reduce((obj, pair) => {

                                                              const [key, value] = pair.split(": ");

                                                              obj[key] = isNaN(value) ? value : parseInt(value);

                                                              return obj;

                                                            }, {})

                    pointAccumulator.push(point)

                    return

                   }

                   console.log("Unrecognized: " + JSON.stringify(line))

                   hasError = true

                   throw ""

                 })

    hasError = false

    return parsed

  }

  Component {

    id: shapePathComponent

    ShapePath {

      fillColor: "transparent"

      scale: Qt.size(mapContainer.width / mapContainer.mapWidth, mapContainer.height / mapContainer.mapHeight)

      strokeWidth: 3

    }

  }

  Component {

    id: pathLineComponent

    PathLine {

    }

  }

  function polygons2shapes(polygons, lineColor, rectColor) {

    if (!Array.isArray(polygons)) {

      return []

    }

    let rectangles = []

    polygons.forEach(polygon => polygon.forEach(r => {

                                                   let shapePath = shapePathComponent.createObject(shape)

                                                   shapePath.strokeWidth = 1

                                                   shapePath.strokeColor = rectColor

                                                   shapePath.startX = r.x

                                                   shapePath.startY = r.y

                                                   shapePath.pathElements = [

                                                      pathLineComponent.createObject(shapePath, {x: r.x, y: r.y + r.h}),

                                                      pathLineComponent.createObject(shapePath, {x: r.x + r.w, y: r.y + r.h}),

                                                      pathLineComponent.createObject(shapePath, {x: r.x + r.w, y: r.y}),

                                                      pathLineComponent.createObject(shapePath, {x: r.x, y: r.y})

                                                   ]

                                                   rectangles.push(shapePath)

                                                 }))

    let polygonShapes = polygons.map(polygon => {

                                             let points = polygon.map(r => ({x: r.x + r.w / 2, y: r.y + r.h / 2}))

                                             let shapePath = shapePathComponent.createObject(shape)

                                             let start = points[points.length - 1]

                                             shapePath.strokeColor = lineColor

                                             shapePath.startX = start.x

                                             shapePath.startY = start.y

                                             shapePath.pathElements = points.map(p => pathLineComponent.createObject(shapePath, p))

                                             return shapePath

                                             })

    return rectangles.concat(polygonShapes)

  }

  function renderTemplate(template) {

    return polygons2shapes(template.outline_points, "red", "black").concat(polygons2shapes(template.walls, "gray", "gray"))

  }

}