'use strict';

var Node = require('./');

module.exports = Node.define({

type: 'DROP INDEX',

constructor: function(table, indexName) {

if (!indexName) {

throw new Error('No index defined!');

} else if (Array.isArray(indexName) && (typeof indexName[0] === 'string')) {

indexName = indexName[0];

} else if (Array.isArray(indexName)) {

var columns = indexName.map(function(col) { return col.name; }).sort();

indexName = [table._name].concat(columns).join('_');

}

Node.call(this);

this.table = table;

this.options = { indexName: indexName };

},

indexName: function() {

var result = this.options.indexName;

if (!result) {

var columns = this.options.columns.map(function(col) {

return col.name;

}).sort();

result = [this.table._name];

result = result.concat(columns);

result = result.join('_');

}

return result;

}

});