import _ from 'lodash';
import {
  ColumnInfo,
  ConstraintInfo,
  DatabaseInfo,
  ForeignKeyInfo,
  PrimaryKeyInfo,
  TableInfo,
  IndexInfo,
  CheckInfo,
  UniqueInfo,
  SqlObjectInfo,
  NamedObjectInfo,
  ColumnsConstraintInfo,
} from '../../types';

export class DatabaseInfoAlterProcessor {
  constructor(public db: DatabaseInfo) {}

  createTable(table: TableInfo) {
    this.db.tables.push(table);
  }

  dropTable(table: TableInfo) {
    _.remove(this.db.tables, x => x.pureName == table.pureName && x.schemaName == table.schemaName);
  }

  createSqlObject(obj: SqlObjectInfo) {
    this.db[obj.objectTypeField].push(obj);
  }

  dropSqlObject(obj: SqlObjectInfo) {
    _.remove(
      this.db[obj.objectTypeField] as SqlObjectInfo[],
      x => x.pureName == obj.pureName && x.schemaName == obj.schemaName
    );
  }

  createColumn(column: ColumnInfo) {
    const table = this.db.tables.find(x => x.pureName == column.pureName && x.schemaName == column.schemaName);
    if (!table) throw new Error(`createColumn error, cannot find table: ${column.schemaName}.${column.pureName}`);
    table.columns.push(column);
  }

  changeColumn(oldColumn: ColumnInfo, newColumn: ColumnInfo) {
    const table = this.db.tables.find(x => x.pureName == oldColumn.pureName && x.schemaName == oldColumn.schemaName);
    if (!table) throw new Error(`changeColumn error, cannot find table: ${oldColumn.schemaName}.${oldColumn.pureName}`);
    table.columns = table.columns.map(x => (x.columnName == oldColumn.columnName ? newColumn : x));
  }

  dropColumn(column: ColumnInfo) {
    const table = this.db.tables.find(x => x.pureName == column.pureName && x.schemaName == column.schemaName);
    if (!table) throw new Error(`dropColumn error, cannot find table: ${column.schemaName}.${column.pureName}`);
    _.remove(table.columns, x => x.columnName == column.columnName);
  }

  createConstraint(constraint: ConstraintInfo) {
    const table = this.db.tables.find(x => x.pureName == constraint.pureName && x.schemaName == constraint.schemaName);
    switch (constraint.constraintType) {
      case 'primaryKey':
        table.primaryKey = constraint as PrimaryKeyInfo;
        break;
      case 'sortingKey':
        table.sortingKey = constraint as ColumnsConstraintInfo;
        break;
      case 'foreignKey':
        table.foreignKeys.push(constraint as ForeignKeyInfo);
        break;
      case 'index':
        table.indexes.push(constraint as IndexInfo);
        break;
      case 'unique':
        table.uniques.push(constraint as UniqueInfo);
        break;
      case 'check':
        table.checks.push(constraint as CheckInfo);
        break;
    }
  }

  changeConstraint(oldConstraint: ConstraintInfo, newConstraint: ConstraintInfo) {
    const table = this.db.tables.find(
      x => x.pureName == oldConstraint.pureName && x.schemaName == oldConstraint.schemaName
    );
  }

  dropConstraint(constraint: ConstraintInfo) {
    const table = this.db.tables.find(x => x.pureName == constraint.pureName && x.schemaName == constraint.schemaName);
    switch (constraint.constraintType) {
      case 'primaryKey':
        table.primaryKey = null;
        break;
      case 'sortingKey':
        table.sortingKey = null;
        break;
      case 'foreignKey':
        table.foreignKeys = table.foreignKeys.filter(x => x.constraintName != constraint.constraintName);
        break;
      case 'index':
        table.indexes = table.indexes.filter(x => x.constraintName != constraint.constraintName);
        break;
      case 'unique':
        table.uniques = table.uniques.filter(x => x.constraintName != constraint.constraintName);
        break;
      case 'check':
        table.checks = table.checks.filter(x => x.constraintName != constraint.constraintName);
        break;
    }
  }

  renameTable(table: TableInfo, newName: string) {
    this.db.tables.find(x => x.pureName == table.pureName && x.schemaName == table.schemaName).pureName = newName;
  }

  renameSqlObject(obj: SqlObjectInfo, newName: string) {
    this.db[obj.objectTypeField].find(x => x.pureName == obj.pureName && x.schemaName == obj.schemaName).pureName =
      newName;
  }

  renameColumn(column: ColumnInfo, newName: string) {
    const table = this.db.tables.find(x => x.pureName == column.pureName && x.schemaName == column.schemaName);
    table.columns.find(x => x.columnName == column.columnName).columnName = newName;
  }

  renameConstraint(constraint: ConstraintInfo, newName: string) {}

  recreateTable(oldTable: TableInfo, newTable: TableInfo) {
    throw new Error('recreateTable not implemented for DatabaseInfoAlterProcessor');
  }

  fillPreloadedRows(
    table: NamedObjectInfo,
    oldRows: any[],
    newRows: any[],
    key: string[],
    insertOnly: string[],
    autoIncrementColumn: string
  ) {
    const tableInfo = this.db.tables.find(x => x.pureName == table.pureName && x.schemaName == table.schemaName);
    tableInfo.preloadedRows = newRows;
    tableInfo.preloadedRowsKey = key;
    tableInfo.preloadedRowsInsertOnly = insertOnly;
  }

  setTableOption(table: TableInfo, optionName: string, optionValue: string) {
    const tableInfo = this.db.tables.find(x => x.pureName == table.pureName && x.schemaName == table.schemaName);
    tableInfo[optionName] = optionValue;
  }
}