var https = require("https");
const algoliasearch = require('algoliasearch');

const client = algoliasearch('AZ2Z9CJSJ0', 'e92300d4e8dbaf2cbaa9ebbbeb4e06e6');
const index = client.initIndex('test_appsmith');

var options = {
  headers: {
    Authorization:
      "Bearer aEhCb3hxVzVYWFJCY0g4b1owZmdKcTdJUmc0MjotTTY5cHFwVDlxTWx0cFU2akh4MC0tTTY5cHFwVWFobjBaRWNzTjh0WA==",
    Cookie: "__cfduid=d8bac210f6e11cb26a8cd921f77727e3f1588323072",
  },
};

console.log("Loading function");


function getPage(pageId) {
  return new Promise((resolve, reject) => {
    https.get(`https://api-beta.gitbook.com/v1/spaces/-Lzuzdhj8LjrQPaeyCxr/content/v/master/id/${pageId}?format=markdown`, options, (res) => {
      res.setEncoding('utf8');
      let rawData = '';
      res.on('data', (chunk) => { rawData += chunk; });
      res.on('end', () => {
        try {
          const parsedData = JSON.parse(rawData);
          resolve(parsedData);
        } catch (e) {
          reject(e)
          console.error(e.message);
        }
      });
    })
  });
}

const pages = []


function pushChildPages(masterPage) {
  if (masterPage.pages) {
    masterPage.pages.forEach(page => {
      page.path = masterPage.path + "/" + page.path;
      pushChildPages(page);
      page.pages = undefined;
      pages.push(page);
    });
  }
}

const orderArr = [{
  path: "master/quick-start",
  order: 0,
}, {
  path: "master/core-concepts/building-the-ui",
  order: 1
}, {
  path: "master/core-concepts/building-the-ui/displaying-api-data",
  order: 2
}, {
  path: "master/core-concepts/apis",
  order: 3
}, {
  path: "master/core-concepts/apis/taking-inputs-from-widgets",
  order: 4
}]

function swap(arr, index1, index2) {
  let x = arr[index1]
  arr[index1] = arr[index2]
  arr[index2] = x;
}

exports.handler = async (event) => {
  const response = await new Promise((resolve, reject) => {
    const req = https.get("https://api-beta.gitbook.com/v1/spaces/-Lzuzdhj8LjrQPaeyCxr/content", options, (res) => {
      res.setEncoding('utf8');
      let rawData = '';
      res.on('data', (chunk) => { rawData += chunk; });
      res.on('end', () => {
        try {
          const parsedData = JSON.parse(rawData);
          let masterPage = parsedData.variants[0].page;

          pushChildPages(masterPage);
          masterPage.pages = undefined;

          pages.push(masterPage);

          let promises = pages.map(page => page.uid).map(getPage);
          Promise.all(promises).then(updatedPages => {
            updatedPages.forEach((page, index) => {
              page.path = pages[index].path;
              page.pages = undefined;
              page.objectID = page.uid;
              if (page.path === "master/changelog") {
                page.document = undefined
              }
            });

            orderArr.forEach(order => {
              let index = updatedPages.findIndex(i => i.path === order.path)
              if (index !== -1) {
                swap(updatedPages, index, order.order)
              }
            })

            updatedPages = updatedPages.map((item, index) => { return { ...item, defaultOrder: index } })


            // resolve({
            //   statusCode: 200,
            //   body: JSON.stringify(updatedPages)
            // })

            index.replaceAllObjects(updatedPages, {
              autoGenerateObjectIDIfNotExist: true
            }).then(({ objectIDs }) => {
              console.log(objectIDs);
              resolve({
                statusCode: 200,
                body: JSON.stringify(updatedPages)
              })
            }).catch(e => {
              reject({
                statusCode: 500,
                body: 'Algolia upload failed.'
              })
            })
          });
        } catch (e) {
          reject({
            statusCode: 500,
            body: 'Most probably gitbook getPage apis failed'
          })
        }
      });
    });
  });

  return response;
};