// tbd
// - formula dependency list
// - nested lookup/ rollup

const Api = require('nocodb-sdk').Api;
const { UITypes } = require('nocodb-sdk');
const jsonfile = require('jsonfile');

let inputConfig = jsonfile.readFileSync(`config.json`)
let ncConfig = {
  srcProject: inputConfig.srcProject,
  projectName: inputConfig.dstProject,
  baseURL: inputConfig.baseURL,
  headers: {
    'xc-auth': `${inputConfig["xc-auth"]}`
  }
};
let ncIn = jsonfile.readFileSync(`${ncConfig.srcProject}.json`);

let api = {};
let ncProject = {};
let link = [];
let lookup = [];
let rollup = [];
let formula = [];

let rootLinks = [];

// maps v1 table ID, v2 table ID & table title to table schema
let ncTables = {};


async function createBaseTables() {
  console.log(`createBaseTables`);
  for (let i = 0; i < ncIn.length; i++) {
    let tblSchema = ncIn[i];
    let reducedColumnSet = tblSchema.columns.filter(
      a =>
        a.uidt !== UITypes.LinkToAnotherRecord &&
        a.uidt !== UITypes.Lookup &&
        a.uidt !== UITypes.Rollup &&
        a.uidt !== UITypes.Formula
    );
    link.push(
      ...tblSchema.columns.filter(a => a.uidt === UITypes.LinkToAnotherRecord)
    );
    lookup.push(...tblSchema.columns.filter(a => a.uidt === UITypes.Lookup));
    rollup.push(...tblSchema.columns.filter(a => a.uidt === UITypes.Rollup));
    formula.push(...tblSchema.columns.filter(a => a.uidt === UITypes.Formula));
    formula.map(a => (a['table_id'] = tblSchema.id));

    let tbl = await api.dbTable.create(ncProject.id, {
      title: tblSchema.title,
      table_name: tblSchema.title,
      columns: reducedColumnSet.map(({ id, ...rest }) => ({ ...rest }))
    });
    ncTables[tbl.title] = tbl;
    ncTables[tbl.id] = tbl;
    ncTables[tblSchema.id] = tbl;
  }
}

let linksCreated = [];
function isLinkCreated(pId, cId) {
  let idx = linksCreated.findIndex(a => a.cId === pId && a.pId === cId);
  if (idx === -1) {
    linksCreated.push({ pId: pId, cId: cId });
    return false;
  }
  return true;
}

// retrieve nc-view column ID from corresponding nc-column ID
async function nc_getViewColumnId(viewId, viewType, ncColumnId) {
  // retrieve view Info
  let viewDetails;

  if (viewType === 'form')
    viewDetails = (await api.dbView.formRead(viewId)).columns;
  else if (viewType === 'gallery')
    viewDetails = (await api.dbView.galleryRead(viewId)).columns;
  else viewDetails = await api.dbView.gridColumnsList(viewId);

  return viewDetails.find(x => x.fk_column_id === ncColumnId)?.id;
}

async function createFormula() {
  for (let i = 0; i < formula.length; i++) {
    let tbl = await api.dbTableColumn.create(ncTables[formula[i].table_id].id, {
      uidt: UITypes.Formula,
      title: formula[i].title,
      formula_raw: formula[i].formula_raw
    });
  }
}

async function createLinks() {
  console.log(`createLinks`);

  for (let i = 0; i < link.length; i++) {
    if (
      (link[i].colOptions.type === 'mm' &&
        false ===
          isLinkCreated(
            link[i].colOptions.fk_parent_column_id,
            link[i].colOptions.fk_child_column_id
          )) ||
      link[i].colOptions.type === 'hm'
    ) {
      let srcTbl = ncTables[link[i].colOptions.fk_model_id];
      let dstTbl = ncTables[link[i].colOptions.fk_related_model_id];

      // create link
      let tbl = await api.dbTableColumn.create(srcTbl.id, {
        uidt: UITypes.LinkToAnotherRecord,
        title: link[i].title,
        parentId: srcTbl.id,
        childId: dstTbl.id,
        type: link[i].colOptions.type
      });
      ncTables[tbl.title] = tbl;
      ncTables[tbl.id] = tbl;
      ncTables[link[i].colOptions.fk_model_id] = tbl;

      // for data-link procedure later
      rootLinks.push({ linkColumn: link[i], linkSrcTbl: srcTbl });

      // symmetry field update
      //
      let v2ColSchema = tbl.columns.find(x => x.title === link[i].title);
      // read related table again after link is created
      dstTbl = await api.dbTable.read(dstTbl.id);
      let v2SymmetricColumn =
        link[i].colOptions.type === 'mm'
          ? dstTbl.columns.find(
              x =>
                x.uidt === UITypes.LinkToAnotherRecord &&
                x?.colOptions.fk_parent_column_id ===
                  v2ColSchema.colOptions.fk_child_column_id &&
                x?.colOptions.fk_child_column_id ===
                  v2ColSchema.colOptions.fk_parent_column_id
            )
          : dstTbl.columns.find(
              x =>
                x.uidt === UITypes.LinkToAnotherRecord &&
                x?.colOptions.fk_parent_column_id ===
                  v2ColSchema.colOptions.fk_parent_column_id &&
                x?.colOptions.fk_child_column_id ===
                  v2ColSchema.colOptions.fk_child_column_id
            );
      let v1SymmetricColumn =
        link[i].colOptions.type === 'mm'
          ? link.find(
              x =>
                x.colOptions.fk_parent_column_id ===
                  link[i].colOptions.fk_child_column_id &&
                x.colOptions.fk_child_column_id ===
                  link[i].colOptions.fk_parent_column_id &&
                x.colOptions.type === 'mm'
            )
          : link.find(
              x =>
                x.colOptions.fk_parent_column_id ===
                  link[i].colOptions.fk_parent_column_id &&
                x.colOptions.fk_child_column_id ===
                  link[i].colOptions.fk_child_column_id &&
                x.colOptions.type === 'bt'
            );

      tbl = await api.dbTableColumn.update(v2SymmetricColumn.id, {
        ...v2SymmetricColumn,
        title: v1SymmetricColumn.title,
        column_name: null
      });
      ncTables[tbl.title] = tbl;
      ncTables[tbl.id] = tbl;
      ncTables[v1SymmetricColumn.colOptions.fk_model_id] = tbl;
    }
  }
}

function get_v2Id(v1ColId) {
  for (let i = 0; i < ncIn.length; i++) {
    let tblSchema = ncIn[i];
    let colSchema = {};
    if (
      undefined !== (colSchema = tblSchema.columns.find(x => x.id === v1ColId))
    ) {
      let colName = colSchema.title;
      let v2Tbl = ncTables[tblSchema.id];
      return v2Tbl.columns.find(y => y.title === colName)?.id;
    }
  }
}

async function createLookup() {
  console.log(`createLookup`);

  for (let i = 0; i < lookup.length; i++) {
    let srcTbl = ncTables[lookup[i].colOptions.fk_model_id];
    let v2_fk_relation_column_id = get_v2Id(
      lookup[i].colOptions.fk_relation_column_id
    );
    let v2_lookup_column_id = get_v2Id(
      lookup[i].colOptions.fk_lookup_column_id
    );

    if (v2_lookup_column_id) {
      let tbl = await api.dbTableColumn.create(srcTbl.id, {
        uidt: UITypes.Lookup,
        title: lookup[i].title,
        fk_relation_column_id: v2_fk_relation_column_id,
        fk_lookup_column_id: v2_lookup_column_id
      });
      ncTables[tbl.title] = tbl;
      ncTables[tbl.id] = tbl;
      ncTables[lookup[i].colOptions.fk_model_id] = tbl;
    }
  }
}

async function createRollup() {
  console.log(`createRollup`);

  for (let i = 0; i < rollup.length; i++) {
    let srcTbl = ncTables[rollup[i].colOptions.fk_model_id];
    let v2_fk_relation_column_id = get_v2Id(
      rollup[i].colOptions.fk_relation_column_id
    );
    let v2_rollup_column_id = get_v2Id(
      rollup[i].colOptions.fk_rollup_column_id
    );

    if (v2_rollup_column_id) {
      let tbl = await api.dbTableColumn.create(srcTbl.id, {
        uidt: UITypes.Rollup,
        title: rollup[i].title,
        column_name: rollup[i].title,
        fk_relation_column_id: v2_fk_relation_column_id,
        fk_rollup_column_id: v2_rollup_column_id,
        rollup_function: rollup[i].colOptions.rollup_function
      });
      ncTables[tbl.title] = tbl;
      ncTables[tbl.id] = tbl;
      ncTables[rollup[i].colOptions.fk_model_id] = tbl;
    }
  }
}

async function configureGrid() {
  console.log(`configureGrid`);

  for (let i = 0; i < ncIn.length; i++) {
    let tblSchema = ncIn[i];
    let tblId = ncTables[tblSchema.id].id;
    let gridList = tblSchema.views.filter(a => a.type === 3);
    let srcTbl = await api.dbTable.read(tblId);

    const view = await api.dbView.list(tblId);

    // create / rename view
    for (let gridCnt = 0; gridCnt < gridList.length; gridCnt++) {
      let viewCreated = {};
      // rename first view; default view already created
      if (gridCnt === 0) {
        viewCreated = await api.dbView.update(view.list[0].id, {
          title: gridList[gridCnt].title
        });
      }
      // create new views
      else {
        viewCreated = await api.dbView.gridCreate(tblId, {
          title: gridList[gridCnt].title
        });
      }

      // retrieve view Info
      let viewId = viewCreated.id;
      let viewDetails = await api.dbView.gridColumnsList(viewId);

      // column visibility
      for (
        let colCnt = 0;
        colCnt < gridList[gridCnt].columns.length;
        colCnt++
      ) {
        let ncColumnId = srcTbl.columns.find(
          a => a.title === gridList[gridCnt].columns[colCnt].title
        )?.id;
        // let ncViewColumnId = await nc_getViewColumnId( viewCreated.id, "grid", ncColumnId )
        let ncViewColumnId = viewDetails.find(
          x => x.fk_column_id === ncColumnId
        )?.id;
        // column order & visibility
        await api.dbViewColumn.update(viewCreated.id, ncViewColumnId, {
          show: gridList[gridCnt].columns[colCnt].show,
          order: gridList[gridCnt].columns[colCnt].order
        });
        await api.dbView.gridColumnUpdate(ncViewColumnId, {
          width: gridList[gridCnt].columns[colCnt].width
        });
      }

      // sort
      for (let sCnt = 0; sCnt < gridList[gridCnt].sort.length; sCnt++) {
        let sColName = tblSchema.columns.find(
          a => gridList[gridCnt].sort[sCnt].fk_column_id === a.id
        ).title;
        await api.dbTableSort.create(viewId, {
          fk_column_id: srcTbl.columns.find(a => a.title === sColName)?.id,
          direction: gridList[gridCnt].sort[sCnt].direction
        });
      }

      // filter
      for (let fCnt = 0; fCnt < gridList[gridCnt].filter.length; fCnt++) {
        let fColName = tblSchema.columns.find(
          a => gridList[gridCnt].sort[fCnt].fk_column_id === a.id
        ).title;
        await api.dbTableFilter.create(viewId, {
          ...gridList[gridCnt].filter[fCnt],
          fk_column_id: srcTbl.columns.find(a => a.title === fColName)?.id
        });
      }
    }
  }
}

async function configureGallery() {
  console.log(`configureGallery`);

  for (let i = 0; i < ncIn.length; i++) {
    let tblSchema = ncIn[i];
    let tblId = ncTables[tblSchema.id].id;
    let galleryList = tblSchema.views.filter(a => a.type === 2);
    for (let cnt = 0; cnt < galleryList.length; cnt++) {
      const viewCreated = await api.dbView.galleryCreate(tblId, {
        title: galleryList[cnt].title
      });
    }
  }
}

async function configureForm() {
  console.log(`configureForm`);

  for (let i = 0; i < ncIn.length; i++) {
    let tblSchema = ncIn[i];
    let tblId = ncTables[tblSchema.id].id;
    let formList = tblSchema.views.filter(a => a.type === 1);
    let srcTbl = await api.dbTable.read(tblId);

    for (let formCnt = 0; formCnt < formList.length; formCnt++) {
      const formData = {
        title: formList[formCnt].title,
        ...formList[formCnt].property
      };
      const viewCreated = await api.dbView.formCreate(tblId, formData);

      // column visibility
      for (
        let colCnt = 0;
        colCnt < formList[formCnt].columns.length;
        colCnt++
      ) {
        let ncColumnId = srcTbl.columns.find(
          a => a.title === formList[formCnt].columns[colCnt].title
        )?.id;
        let ncViewColumnId = await nc_getViewColumnId(
          viewCreated.id,
          'form',
          ncColumnId
        );
        // column order & visibility
        await api.dbView.formColumnUpdate(ncViewColumnId, {
          show: formList[formCnt].columns[colCnt].show,
          order: formList[formCnt].columns[colCnt].order,
          label: formList[formCnt].columns[colCnt].label,
          description: formList[formCnt].columns[colCnt].description,
          required: formList[formCnt].columns[colCnt].required
        });
      }
    }
  }
}

async function restoreBaseData() {
  console.log(`restoreBaseData`);

  for (let i = 0; i < ncIn.length; i++) {
    let tblSchema = ncIn[i];
    let tblId = ncTables[tblSchema.id].id;
    let pk = tblSchema.columns.find(a => a.pk).title;

    let moreRecords = true;
    let offset = 0,
      limit = 25;

    while (moreRecords) {
      let recList = await api.dbTableRow.list(
        'nc',
        ncConfig.srcProject,
        tblSchema.title,
        {},
        {
          query: { limit: limit, offset: offset }
        }
      );
      moreRecords = !recList.pageInfo.isLastPage;
      offset += limit;

      for (let recCnt = 0; recCnt < recList.list.length; recCnt++) {
        let record = await api.dbTableRow.read(
          'nc',
          ncConfig.srcProject,
          tblSchema.title,
          recList.list[recCnt][pk]
        );

        // post-processing on the record
        for (const [key, value] of Object.entries(record)) {
          let table = ncTables[tblId];
          // retrieve datatype
          const dt = table.columns.find(x => x.title === key)?.uidt;
          if (dt === UITypes.LinkToAnotherRecord) delete record[key];
          if (dt === UITypes.Lookup) delete record[key];
          if (dt === UITypes.Rollup) delete record[key];
        }
        await api.dbTableRow.create(
          'nc',
          ncConfig.projectName,
          tblSchema.title,
          record
        );
      }
    }
  }
}

async function restoreLinks() {
  console.log(`restoreLinks`);

  for (let i = 0; i < rootLinks.length; i++) {
    let pk = rootLinks[i].linkSrcTbl.columns.find(a => a.pk).title;
    let moreRecords = true;
    let offset = 0,
      limit = 25;

    while (moreRecords) {
      let recList = await api.dbTableRow.list(
        'nc',
        ncConfig.srcProject,
        rootLinks[i].linkSrcTbl.title,
        {},
        {
          query: { limit: limit, offset: offset }
        }
      );
      moreRecords = !recList.pageInfo.isLastPage;
      offset += limit;

      for (let recCnt = 0; recCnt < recList.list.length; recCnt++) {
        let record = await api.dbTableRow.read(
          'nc',
          ncConfig.srcProject,
          rootLinks[i].linkSrcTbl.title,
          recList.list[recCnt][pk]
        );
        let linkField = record[rootLinks[i].linkColumn.title];
        if (linkField.length) {
          await api.dbTableRow.nestedAdd(
            'nc',
            ncConfig.projectName,
            rootLinks[i].linkSrcTbl.title,
            record[pk],
            rootLinks[i].linkColumn.colOptions.type,
            encodeURIComponent(rootLinks[i].linkColumn.title),
            linkField[0][pk]
          );
        }
      }
    }
  }
}

async function importSchema() {
  api = new Api(ncConfig);

  const x = await api.project.list();
  const p = x.list.find(a => a.title === ncConfig.projectName);
  if (p) await api.project.delete(p.id);
  ncProject = await api.project.create({ title: ncConfig.projectName });

  await createBaseTables();
  await createLinks();
  await createLookup();
  await createRollup();
  await createFormula();

  // configure views
  await configureGrid();
  await configureGallery();
  await configureForm();

  // restore data only if source project exists
  const p2 = x.list.find(a => a.title === ncConfig.srcProject);
  if (p2 !== undefined) {
    await restoreBaseData();
    await restoreLinks();
  }
}
(async () => {
  await importSchema();
  console.log('completed');
})().catch(e => console.log(e));