#!/usr/bin/env node

var path = require('path');

var grainstore = require('grainstore');
var mapnik = require('mapnik');
var redis = require('redis');

function usage(me, exitcode) {
  console.log("Usage: " + me + " <database_name> <table_name> [<target_mapnik_version>]");
  process.exit(exitcode);
}

var node_path = process.argv.shift(); 
var script_path = process.argv.shift(); 
var me = path.basename(script_path);

var database_name = process.argv.shift()
var table_name = process.argv.shift()
var MAPNIK_VERSION = process.argv.shift()


if ( ! MAPNIK_VERSION ) {
  MAPNIK_VERSION = mapnik.versions.mapnik;
}

if ( ! database_name || ! table_name) {
  usage(me, 1);
}

var REDIS_PORT = 6379; // TODO: make a command line parameter

var dbnum = 0;

var mml_store = new grainstore.MMLStore({port:REDIS_PORT}, {mapnik_version:MAPNIK_VERSION});

var failures = [];

var client = redis.createClient(REDIS_PORT, 'localhost');
client.on('connect', function() {
  client.select(dbnum);
  client.keys('map_style|' + database_name + '|' + table_name, function(err, matches) {

    processNext = function() {
      if ( ! matches.length ) process.exit(failures.length);
      var k = matches.shift();

      if ( /map_style\|.*\|.*\|/.test(k) ) {
        //console.warn("Key " + k + " is EXTENDED, skipping");
        processNext();
      } 

      var out = 'map_style|' + database_name + '|' + table_name + ': ';

      var mml_builder = mml_store.mml_builder({
        dbname:database_name, 
        table:table_name},
        function(err, payload) {
          if ( err ) { 
            console.warn(out + err.message); 
            failures.push(k); processNext(); 
          }
          else {
            mml_builder.resetStyle(function(err, data) {
              if ( err ) { 
                console.warn(out + err.message); 
                failures.push(k); 
              }
              else console.log(out + 'OK');
              processNext();
            }, true);
          }
      });

    };

    processNext();

  });

});