import React from "react"
import { StyleSheet, View, TouchableHighlight, Image } from "react-native"
import {
  ViroARSceneNavigator,
  ViroARScene,
  ViroARPlane,
  ViroAmbientLight,
  ViroDirectionalLight,
  ViroMaterials,
  Viro3DObject,
  ViroSpotLight,
  ViroNode,
  ViroQuad,
  ViroConstants,
} from "react-viro"
import autobind from "autobind-decorator"
import backImage from "./images/back.png"
import { config } from "../config"
import "url-search-params-polyfill"

const shapes = {
  order: {
    source: require("./models/hardhat_obj.obj"),
    resources: [require("./models/hardhat.mtl")],
    scale: [0.5, 0.5, 0.5],
  },
  complaint: {
    source: require("./models/question_obj.obj"),
    resources: [require("./models/question.mtl")],
    scale: [1, 1, 1],
  },
  inspection: {
    source: require("./models/clipboard_obj.obj"),
    resources: [require("./models/clipboard.mtl")],
    scale: [1, 1, 1],
  },
}

const distance = (vectorA, vectorB) => {
  return Math.sqrt(
    (vectorB[0] - vectorA[0]) * (vectorB[0] - vectorA[0]) +
      (vectorB[1] - vectorA[1]) * (vectorB[1] - vectorA[1]) +
      (vectorB[2] - vectorA[2]) * (vectorB[2] - vectorA[2])
  )
}

class WorkItemSceneAR extends React.Component {
  constructor(props) {
    super(props)

    this.state = {
      position: [0, 0, 0],
      rotation: [0, 0, 0],
      shouldBillboard: true,
      trackingInitialized: false,
      haveAnchor: false,
    }
  }

  @autobind
  handleLoadEnd() {
    this.arScene.getCameraOrientationAsync().then((orientation) => {
      return this.arScene
        .performARHitTestWithRay(orientation.forward)
        .then((results) => {
          const { forward, position } = orientation
          // Default position is just one meter in front of the user
          const defaultPosition =
            [forward[0] * 1.0, forward[1] * 1.0, forward[2]] * 1.0
          let hitResultPosition = null

          // Filter the hit test results based on the position.
          for (var i = 0; i < results.length; i++) {
            let result = results[i]

            if (result.type == "ExistingPlaneUsingExtent") {
              let distance = Math.sqrt(
                (result.transform.position[0] - position[0]) *
                  (result.transform.position[0] - position[0]) +
                  (result.transform.position[1] - position[1]) *
                    (result.transform.position[1] - position[1]) +
                  (result.transform.position[2] - position[2]) *
                    (result.transform.position[2] - position[2])
              )
              if (distance > 1 && distance < 15) {
                // If we found a plane a decent distance away, choose it!
                hitResultPosition = result.transform.position
                break
              }
            } else if (result.type == "FeaturePoint" && !hitResultPosition) {
              // If we haven't found a plane and this feature point is within range,
              // then we'll use it as the initial display point
              let d = distance(position, result.transform.position)

              if (d > 1 && d < 15) {
                hitResultPosition = result.transform.position
              }
            }
          }

          this.setState({
            position: hitResultPosition || defaultPosition,
          })

          setTimeout(() => {
            this.updateInitialRotation()
          }, 200)
        })
        .catch((err) => {})
    })
  }

  @autobind
  updateInitialRotation() {
    this.arNode.getTransformAsync().then((retDict) => {
      let rotation = retDict.rotation
      let absX = Math.abs(rotation[0])
      let absZ = Math.abs(rotation[2])

      let yRotation = rotation[1]

      // If the X and Z aren't 0, then adjust the y rotation.
      if (absX > 1 && absZ > 1) {
        yRotation = 180 - yRotation
      }

      this.setState({
        rotation: [0, yRotation, 0],
        shouldBillboard: false,
      })
    })
  }

  @autobind
  handleTrackingUpdated(state, reason) {
    if (
      !this.state.trackingInitialized &&
      state === ViroConstants.TRACKING_NORMAL
    ) {
      this.setState({ trackingInitialized: true })
    }
  }

  @autobind
  handleAnchorFound() {
    this.setState({ haveAnchor: true })
  }

  @autobind
  handleClick(position, source) {
    const { workItemId } = this.props

    this.props.history.replace(
      `/activity${workItemId ? "?workItemId=" + workItemId : ""}`
    )
  }

  render() {
    const {
      position,
      scale,
      rotation,
      shouldBillboard,
      trackingInitialized,
      haveAnchor,
    } = this.state
    const shape = shapes[this.props.workItemType]

    return (
      <ViroARScene
        anchorDetectionTypes="PlanesHorizontal"
        ref={(ref) => (this.arScene = ref)}
        onTrackingUpdated={this.handleTrackingUpdated}
        onAnchorFound={this.handleAnchorFound}>
        <ViroAmbientLight color="#ffffff" intensity={200} />
        <ViroNode
          ref={(ref) => (this.arNode = ref)}
          transformBehaviors={shouldBillboard ? "billboardY" : []}
          position={position}
          rotation={rotation}>
          <ViroSpotLight
            innerAngle={5}
            outerAngle={20}
            direction={[0, -1, 0]}
            position={[0, 10, 0]}
            color="#ffffff"
            castsShadow={true}
            shadowNearZ={0.1}
            shadowFarZ={6}
            shadowOpacity={0.9}
          />
          {shape &&
            trackingInitialized &&
            haveAnchor && (
              <Viro3DObject
                position={[0, 0, -1]}
                source={shape.source}
                resources={shape.resources}
                scale={shape.scale}
                type="OBJ"
                onLoadEnd={this.handleLoadEnd}
                onClick={this.handleClick}
              />
            )}
          <ViroQuad
            rotation={[-90, 0, 0]}
            position={[0, -0.01, 0]}
            width={2.5}
            height={2.5}
            arShadowReceiver={true}
            ignoreEventHandling={true}
          />
        </ViroNode>
      </ViroARScene>
    )
  }
}

export class ARViewer extends React.Component {
  constructor(props) {
    super(props)

    const { search } = this.props.location

    if (search) {
      const params = new URLSearchParams(search)

      this.workItemId = params.get("workItemId")
      this.workItemType = params.get("workItemType")
    }
  }

  @autobind
  handleBackPress() {
    this.props.history.replace("/")
  }

  render() {
    return (
      <View style={{ width: "100%", height: "100%" }}>
        <ViroARSceneNavigator
          style={{ width: "100%", height: "100%" }}
          apiKey={config.viroAPIKey}
          initialScene={{
            scene: WorkItemSceneAR,
            passProps: {
              history: this.props.history,
              workItemId: this.workItemId,
              workItemType: this.workItemType,
            },
          }}
        />

        <View style={{ position: "absolute", left: 30, right: 0, top: 50 }}>
          <TouchableHighlight
            style={{
              height: 80,
              width: 80,
            }}
            onPress={this.handleBackPress}
            underlayColor={"#00000000"}>
            <Image source={backImage} />
          </TouchableHighlight>
        </View>
      </View>
    )
  }
}