import { Editor } from "./editor.js";
import { checkScene } from "./error_check.js";
import { logger } from "./log.js";
import request from "./request.js";

function reloadWorldList(worldList, done) {
  var xhr = new XMLHttpRequest();
  // we defined the xhr
  xhr.onreadystatechange = function () {
    if (this.readyState != 4) return;

    if (this.status == 200) {
      let anns = JSON.parse(this.responseText);

      // load annotations
      anns.forEach((a) => {
        let world = worldList.find((w) => {
          return w.frameInfo.scene == a.scene && w.frameInfo.frame == a.frame;
        });
        if (world) {
          world.annotation.reapplyAnnotation(a.annotation);
        } else {
          console.error("bug?");
        }
      });

      if (done) done();
    }
  };

  xhr.open("POST", request + "/loadworldlist", true);

  let para = worldList.map((w) => {
    return {
      //todo: we could add an id, so as to associate world easily
      scene: w.frameInfo.scene,
      frame: w.frameInfo.frame,
    };
  });

  xhr.send(JSON.stringify(para));
}

var saveDelayTimer = null;
var pendingSaveList = [];

function saveWorldList(worldList) {
  //pendingSaveList = pendingSaveList.concat(worldList);

  worldList.forEach((w) => {
    if (!pendingSaveList.includes(w)) pendingSaveList.push(w);
  });

  if (saveDelayTimer) {
    clearTimeout(saveDelayTimer);
  }

  saveDelayTimer = setTimeout(
    () => {
      logger.log("save delay expired.");

      //pandingSaveList will be cleared soon.
      let scene = pendingSaveList[0].frameInfo.scene;

      doSaveWorldList(pendingSaveList, () => {
        editor.header.updateModifiedStatus();

        checkScene(scene);
      });

      //reset

      saveDelayTimer = null;
      pendingSaveList = [];
    },

    500
  );
}

function doSaveWorldList(worldList, done) {
  if (worldList.length > 0) {
    if (worldList[0].data.cfg.disableLabels) {
      console.log("labels not loaded, save action is prohibitted.");
      return;
    }
  }

  console.log(worldList.length, "frames");
  let ann = worldList.map((w) => {
    return {
      scene: w.frameInfo.scene,
      frame: w.frameInfo.frame,
      annotation: w.annotation.toBoxAnnotations(),
    };
  });

  var xhr = new XMLHttpRequest();
  xhr.open("POST", request + "/saveworldlist", true);
  xhr.setRequestHeader("Content-Type", "application/json");

  xhr.onreadystatechange = function () {
    if (this.readyState != 4) return;

    if (this.status == 200) {
      worldList.forEach((w) => {
        w.annotation.resetModified();
      });

      logger.log(
        `saved: ${worldList[0].frameInfo.scene}: ${worldList.reduce(
          (a, b) => a + " " + b.frameInfo.frame,
          ""
        )}`
      );

      if (done) {
        done();
      }
    } else {
      window.editor.infoBox.show(
        "Error",
        `save failed, status : ${this.status}`
      );
    }

    // end of state change: it can be after some time (async)
  };

  var b = JSON.stringify(ann);
  //console.log(b);
  xhr.send(b);
}

// function saveWorld(world, done){
//     if (world.data.cfg.disableLabels){
//         logger.log("labels not loaded, save action is prohibitted.")
//         return;
//     }

//     console.log(world.annotation.boxes.length, "boxes");
//     let bbox_annotations = world.annotation.toBoxAnnotations();

//     var xhr = new XMLHttpRequest();
//     xhr.open("POST", "/saveworld" +"?scene="+world.frameInfo.scene+"&frame="+world.frameInfo.frame, true);
//     xhr.setRequestHeader('Content-Type', 'application/json');

//     xhr.onreadystatechange = function () {
//         if (this.readyState != 4) return;

//         if (this.status == 200) {
//             logger.log(`saved: ${world}`);
//             world.annotation.resetModified();

//             //reload obj-ids of the scene
//             //todo: this shall be moved to done
//             //load_obj_ids_of_scene(world.frameInfo.scene);

//             if(done){
//                 done();
//             }

//         }

//         // end of state change: it can be after some time (async)
//     };

//     var b = JSON.stringify(bbox_annotations);
//     //console.log(b);
//     xhr.send(b);
// }

export { saveWorldList, reloadWorldList };