const {
  logger,
  Log,
  getTestSpreadSheet,
  GoogleFunctions,
  PluginsManager,
  getCountrySheetByName,
  diff2DArraysCustom,
  saveJsonToFile,
} = require("./common");

// TODO:
// get source sheet --> tha
// get remote sheet --> input
//

class TextTable {
  constructor() {
    // [ Language,... ]
    this.supportedLanguages = [];
    // { category: [ rows ] }
    this.data = {};
    // update tracker
    // { category: { row_number: value } }
    this.update = {};
    //
    this.ordered_rows = [];
  }

  add_category(category) {
    this.data[category] = [];
  }

  add_row(category, row) {
    this.data[category].push(row);
  }

  add_ordered_row(row) {
    this.ordered_rows.push(row);
  }

  add_update(category, row_number, value) {
    this.update[category][row_number.toString()] = value;
  }

  size() {
    let size = 0;
    for (let category in this.data) {
      size += this.data[category].length;
    }
    return size;
  }

  /**
   * Differs between two TextTable objects,
   * return what this table has to update
   *
   * @param {TextTable} another_table
   *
   * @returns {Map}
   */
  diff_by_category(another_table) {
    let column_to_focus = {};
    for (let [idx, lang] of Object.entries(another_table.supportedLanguages)) {
      if (this.supportedLanguages.includes(lang)) {
        column_to_focus[lang] = {
          target: idx,
          source: this.supportedLanguages.indexOf(lang),
        };
      }
    }

    // need add entire category
    Object.keys(another_table.data).forEach((category) => {
      if (!this.data[category]) {
        this.data[category] = another_table.data[category];
        this.update[category] = {};
      }
    });

    // iter through map category first
    for (let category of Object.keys(this.data)) {
      let another_table_data = another_table.data[category];
      if (another_table_data != null) {
        // Log.debug(
        //   `[${category}] source: ${this.data[category].length}, target: ${another_table_data.length}`,
        // );
        let equal_length =
          this.data[category].length == another_table_data.length;
        let need_update =
          another_table_data.length > this.data[category].length;

        if (need_update) {
          Log.debug(`[${category}] need update`);

          // loop check
          for (let i = 0; i < another_table_data.length; i++) {
            if (
              this.data[category][i] &&
              this.data[category][i] != another_table_data[i]
            ) {
              // this.update[category][i] = another_table_data[i];
              //
              //
              // check by column

              for (let [k, v] of Object.entries(column_to_focus)) {
                let source_column = v.source;
                let target_column = v.target;
                if (
                  this.data[category][i][source_column] !=
                  another_table_data[i][target_column]
                ) {
                  Log.debug(
                    `[${category}] ${source_column} != ${target_column} -- ${this.data[category][i][source_column]} != ${another_table_data[i][target_column]}`,
                  );
                }
              }
            } else if (!this.data[category][i]) {
              // this.update[category][i] = another_table_data[i];
              // search line number
              let index = another_table_data.ordered_rows.indexOf(
                another_table_data[i],
              );
              Log.debug(
                `[${category}] index: ${index} --> ${another_table_data[i]}`,
              );
            }
          }
        } else if (this.update[category]) {
          Log.debug(`[${category}] update **NEW**`);
        }
      } else {
        Log.err(
          `[${category}] source: ${this.data[category].length}, target: 0`,
        );
      }
    }
  }
}

function buildTable(raw_data) {
  var table = new TextTable();

  // build table
  Log.debug("Building table...");

  let current_category;
  for (let [idx, row] of Object.entries(raw_data)) {
    if ((row[0] == "TextID" || row[1] == "Note") && row.length >= 3) {
      // expect header
      table.supportedLanguages = row.slice(2);
    }

    switch (row.length) {
      case 2:
        // detect category
        table.add_category(row[1].trim());
        current_category = row[1].trim();
        Log.debug(`Found Category: '${current_category}'`);
        break;
      case 0:
        break;
      default:
        // detect row
        let text_id = row[0];
        if (text_id.toString().length > 0 && current_category != null) {
          // add to table
          table.add_row(current_category, row);
        }
    }

    // Log.debug(`${idx}/${row.length}: ${row}`);
    table.add_ordered_row(row);
  }

  // Log.debug(`Table built --> ${JSON.stringify(table)}`);
  return table;
}

// process
async function syncTaobinText(sheet, country_short, is_test_mode) {
  var source = await getCountrySheetByName(sheet, "tha", "Taobin-Text");
  var remote = await getCountrySheetByName(sheet, country_short, "Taobin-Text");

  // build table
  let sourceTable = buildTable(source);
  let remoteTable = buildTable(remote);
  Log.debug(`source: ${sourceTable.size()}`);
  Log.debug(`remote: ${remoteTable.size()}`);

  // remoteTable.diff_by_category(sourceTable);

  if (sourceTable.size() != remoteTable.size()) {
    // detect missing rows
  } else {
    // detect similarity
  }

  let diffs = diff2DArraysCustom(remote, source);

  saveJsonToFile(`diff_tha_${country_short}.json`, diffs);

  // Log.debug(`diffs: ${JSON.stringify(diffs)}`);
}

const SyncText = {
  version: "1.0.0_250725",
  name: "SyncText",
  run: syncTaobinText,
};

module.exports = {
  SyncText,
};