//auxiliary function clears cache & refreshes sib-displays for a given resource ID
function refreshSibDisplays(resourceId, clearCache = true) {
  let cacheCleared = false;

  Array.from(document.querySelectorAll("sib-display"))
    .filter(sibDisplay => sibDisplay.component.resourceId == resourceId) // keep only elements with resource == edited resource
    .forEach(async (e) => {
      //clear cache if we were unable to before
      if ((clearCache && !cacheCleared) && e.component.resource != null) {
        await e.component.resource.clearCache();
        cacheCleared = true;
      }
      e.dataset.src = e.dataset.src;
    }); // and update them
}

async function updateSources(resource) {
  let res = resource.split('/');
  res.splice(3, 0, 'sources');
  let cacheCleared = false;
  if (event.target.component.resource != null) {
    await event.target.component.resource.clearCache();
    cacheCleared = true;
  }
  refreshSibDisplays(res.join('/'),cacheCleared);
}

//auxiliary function updates displays using a given resource
//NOTE: this is a temporary workaround and should be replaced by a reactive storage
//https://git.startinblox.com/framework/sib-core/issues/524
async function refreshResource(event) {

  // if of the edited resource || id of the container of the created resource
  const resourceId = event.detail.resource["@id"] || event.target.dataset.src;
  updateSources(resourceId, event);
  let resource;
  try {
    resource = document
      .querySelector('[data-src="' + resourceId + '"]')
      .component.resource.getResourceData();
  } catch (e) {
    try {
      resource = document
        .querySelector('[data-src="' + resourceId.replace('circle-members','circles').split('/').slice(0, 4).join('/') + '/"]')
        .component.resource.getResourceData();
    } catch (e) {
      try {
        resource = document
        .querySelector('[nested-field="' + resourceId.split('/').slice(3, 4).join('').replace('circle-members','circles') + '"]')
        .component.resource.getResourceData();
      } catch (e) {
        resource = undefined;
      }
    }
  }

  if(resource) {
    //special case: refresh circles/X/ from circle-members/Y/
    let partnerId = null;
    if (resourceId.includes("circle-members")) {
      partnerId = resource["http://happy-dev.fr/owl/#circle"]["@id"];
    } else if (resourceId.includes("project-members")) {
      partnerId = resource["http://happy-dev.fr/owl/#project"]["@id"];
    }
    //refresh all resources using the partner ID
    if (partnerId != null) {
      refreshSibDisplays(partnerId);
      refreshSibDisplays(partnerId + "members/");
    }
  }


  //special cases updating users/X/circles for the left-side-menu (leaving or joining circle)
  let user = await document.querySelector('sib-auth').getUser();
  if(resourceId.includes('circle') && user != null) {
    let userId = user['@id'];
    refreshSibDisplays(userId + "circles/");
    refreshSibDisplays(resourceId.replace('circle-members','circles').split('/').slice(0, 3).join('/') + '/circles/joinable/');
    refreshSibDisplays(resourceId.replace('circle-members','circles').split('/').slice(0, 3).join('/') + '/sources/circlesjoinable/');
  }

  if(resourceId.includes('users')) {
    refreshSibDisplays(resourceId.split('/').slice(0, 3).join('/') + '/users/');
    refreshSibDisplays(resourceId.split('/').slice(0, 3).join('/') + '/sources/users/');
  }

  //clear cache on this resource
  //NOTE: this is required because the cache is not refreshed after POSTing changes on the resource
  let cacheCleared = false;
  if (event.target.component.resource != null) {
    await event.target.component.resource.clearCache();
    cacheCleared = true;
  }

  //update all displays which use this resource
  refreshSibDisplays(resourceId, cacheCleared);
}

//auxiliary function performs a redirect
//NOTE: currently a sib-display is required to dispatch the requestNavigation event
function performRedirect(route) {
  document.dispatchEvent(
    new CustomEvent("requestNavigation", {
      bubbles: true,
      detail: { route: route }
    })
  );
}

//auxiliary function redirects after leaving a project/circle
//NOTE: this is a temporary workaround until the following issues are resolved:
//https://git.startinblox.com/framework/sib-core/issues/476
//https://git.startinblox.com/framework/sib-core/issues/546
async function checkForPostLeaveRedirect(event) {
  //a redirect will only be required if I left in the information page of the resource
  if(!window.location.href.includes('-information')) {
    return;
  }
  //first need to get a sib-display with this resource id (to have access to the target Proxy, containing model fields)
  const resourceId = event.detail.resource['@id'] || event.target.dataset.src;
  let target = document.querySelector('[data-src="' + resourceId + '"]');
  let resource = target.component.resource.getResourceData();

  //no redirect is required for public circles
  let targetCircleId = resource["http://happy-dev.fr/owl/#circle"];
  if(targetCircleId != undefined) {
    let targetCircle = document.querySelector('[data-src="' + targetCircleId["@id"] + '"]');
    let targetCircleResource = targetCircle.component.resource.getResourceData();
    if(targetCircleResource['http://happy-dev.fr/owl/#status'] == 'Public') {
      return;
    }
  }

  //a redirect will only be required if I've deleted myself
  let targetUser = resource['http://happy-dev.fr/owl/#user'];
  if(targetUser != undefined) {
    //compare with current user
    let user = await document.querySelector('sib-auth').getUser();
    if(targetUser['@id'] != user['@id'] && targetUser['@id'] != undefined) {
      return;
    }
  }

  //perform the redirect
  if(resourceId.includes('circle')) {
    performRedirect('circle-left');
  } else if(resourceId.includes('project')) {
    performRedirect('project-left');
  }
}


document.addEventListener("DOMContentLoaded", function(event) {
  const menuWrappers = Array.from(document.querySelectorAll(".menu-wrapper"));

  //- Toggle sub-menus
  menuWrappers.forEach(menuWrapper => {
    const menu = menuWrapper.querySelector(".menu");
    menu.addEventListener("click", e => {
      menuWrapper.classList.toggle("is-closed");
    });
  });

  //- Watch every sib-forms & update data-src of linked sib-display
  document.querySelector("body").addEventListener("save", event => {
    refreshResource(event);
  });
  document.querySelector("body").addEventListener("resourceDeleted", event => {
    //I might need to be redirected from this page
    checkForPostLeaveRedirect(event).then(refreshResource(event));
  });

});