'use strict';

var db = require('./db');

function singleQuotify(item) { return '\'' + item + '\''; }

exports.up = function(next){
  var stages = ['partial_request', 'partial_send', 'complete',
    'initial_request', 'deposit', 'supplemental_request', 'dispense_request',
    'dispense'].map(singleQuotify).join(',');
  var sources = ['timeout', 'machine', 'published', 'authorized', 'rejected'].
    map(singleQuotify).join(',');
  var sqls = [
    'CREATE TYPE transaction_stage AS ENUM (' + stages + ')',
    'CREATE TYPE transaction_source AS ENUM (' + sources + ')',
    'ALTER TABLE transactions DROP IF EXISTS completed',
    'ALTER TABLE transactions DROP CONSTRAINT transactions_pkey',
    'ALTER TABLE transactions RENAME id TO session_id',
    'ALTER TABLE transactions ADD COLUMN id SERIAL',
    'UPDATE transactions SET id = DEFAULT',
    'ALTER TABLE transactions ADD PRIMARY KEY (id)',
    'CREATE INDEX ON transactions (session_id)',
    'ALTER TABLE transactions ADD COLUMN incoming boolean DEFAULT false',
    'ALTER TABLE transactions ADD COLUMN stage transaction_stage NULL',
    'ALTER TABLE transactions ADD COLUMN source transaction_source NULL',
    'ALTER TABLE transactions ADD COLUMN error text NULL',
    'ALTER TABLE transactions ADD CONSTRAINT transactions_unique_source ' +
      'UNIQUE (session_id,to_address,stage,source)',

    'ALTER TABLE transactions DROP COLUMN status',
    // Convert stages, source to NOT NULL

    'CREATE TABLE pending_transactions ( ' +
    'id serial PRIMARY KEY, ' +
    'session_id uuid UNIQUE, ' +
    'incoming boolean, ' +
    'created timestamp NOT NULL DEFAULT now() ' +
    ')',

    'CREATE TABLE dispenses ( ' +
    'id serial PRIMARY KEY, ' +
    'transaction_id integer UNIQUE REFERENCES transactions(id), ' +
    'dispense1 integer NOT NULL, ' +
    'reject1 integer NOT NULL, ' +
    'count1 integer NOT NULL, ' +
    'dispense2 integer NOT NULL, ' +
    'reject2 integer NOT NULL, ' +
    'count2 integer NOT NULL, ' +
    'refill boolean NOT NULL, ' +
    'error text, ' +
    'created timestamp NOT NULL DEFAULT now() ' +
    ')'
  ];
  db.multi(sqls, next);
};

exports.down = function(next){
  next();
};