var fs = require("fs");
var csv = require('./csv.js');
var Promise = require('bluebird');

var fileName = "./importSales.csv";

// module.exports = function(models, softErrors, handler) {
// 	return new Promise(function(resolve, reject) {
var models = require("./models");
var softErrors = [];
var p = new Promise(function(resolve, reject) {
		//The CSV data as an array of rows (each row is an array).
		var data;
		//The mapping of model attributes to CSV columns.  The oz sizes are arrays of columns since there are multiple.
		var map = {};

		//Database maps so we don't have to constantly query for the same data repeatedly.
		var vendorIdMap = {};
		var measureIdMap = {};
		var itemIdMap = {};

		//Collect the metadata from the first row of the CSV data - make a mapping.
		function collectMetadata() {
			var DATE = 'date';
			var VENDOR = 'vendor';
			var ITEM = 'item';
			var OZ32 = '32 oz';
			var OZ16 = '16 oz';
			var OZ12 = '12 oz';
			var OZ8 = '8 oz';
			var OZ4 = '4 oz';
			var BAGS = 'bags';
			var EACH = 'each';

			//Data is an array of arrays.  data[0] = array of headers.  data[1] = first row of data.
			//Iterate over the columns to create a mapping.
			for(var i = 0; i < data[0].length; i++) {
				var next = data[0][i];

				if(next && next != '') {
					switch(next.toLowerCase()) {
						case DATE:
							map.date = i;
							break;
						case VENDOR:
							map.vendor = i;
							break;
						case ITEM:
							map.item = i;
							break;
						case OZ32:
							map.oz32 = i;
							break;
						case OZ16:
							map.oz16 = i;
							break;
						case OZ12:
							map.oz12 = i;
							break;
						case OZ8:
							map.oz8 = i;
							break;
						case OZ4:
							map.oz4 = i;
							break;
						case BAGS:
							map.bags = i;
							break;
						case EACH:
							map.each = i;
							break;
					}
				}
			}
		}

		//Reads a single row of CSV data and adds it to the database.
		function readRow(rowIndex) {
			if(!data) {
				console.log("WTF?");
				//process.exit(1);
				reject(new Error("Data is null?!?"));
				return;
			}
			else if(!data[rowIndex]) {
				console.log("Empty line?");
				readRow(rowIndex + 1);
				return;
			}

			var date = data[rowIndex][map.date];
			var vendor = data[rowIndex][map.vendor];
			var item = data[rowIndex][map.item];
			var oz32 = data[rowIndex][map.oz32];
			var oz16 = data[rowIndex][map.oz16];
			var oz12 = data[rowIndex][map.oz12];
			var oz8 = data[rowIndex][map.oz8];
			var oz4 = data[rowIndex][map.oz4];
			var bags = data[rowIndex][map.bags];
			var each = data[rowIndex][map.each];

			var vendorId = vendorIdMap[vendor];
			var itemId = itemIdMap[item];
			var priceMap = {};

			var saleQueries = [];

			//TODO: Trim and lowercase any names.
			priceMap[2016] = {
				oz4: 7,
				oz8: 11,
				oz12: 13,
				oz16: 11,
				oz32: 15,
				"pickled onion, spicy": {oz16: 12},
				"pickled onion, sweet": {oz16: 12},
				"pickled onion, fennel": {oz16: 12},
				"pickled beets": {oz16: 15},
				"prickly pear margarita mix": {oz16: 15},
				"prickly pear syrup": {oz16: 15},
				"tomato sauce": {oz16: 15},  //TODO: Replace all 'tomato sauce, xxxx' with 'tomato sauce' for price lookup only.
				"bone broth": {oz16: 20},  //TODO: Replace all 'bone broth, xxxx' with 'bone broth' for price lookup only.
				"fava bean soup": {oz32: 20},
				"pickles, bread butter": {oz16: 11},
				"kimchi": {oz16: 11},
				"kraut - red & white": {oz16: 11},

				"3 pack": {each: 21},
				"espelette, smoked": {each: 1},
				"leather": {each: 6},
				"leather, apple": {each: 6},
				"leather, grape": {each: 6},
				"leather, peach": {each: 6},
				"leather, persimmon": {each: 6},
				"leather, pumpkin": {each: 6},
				"leather, strawberry": {each: 6},
				"leather, quince": {each: 6},
				"membrillo": {each: 7},
				"membrillo candy": {each: 2.5},
				"spices": {each: 4},
				"spices, basil/coriander": {each: 4},
				"spices, fennel": {each: 4},
				"spices, other": {each: 4},
				"spices, pepper": {each: 4},
				"spices, smoked": {each: 4},

				"baba ganoush": {bag: 8, oz4: 8},
				"dried, pear": {bag: 6},  //Price??
				"dried, tomatillo": {bag: 6},  //Price??
				"dried, strawberry": {bag: 7.5},
				"dried, tomato": {bag: 7},
				"pesto": {bags: 8},
				"pesto, cilantro jalapeno": {bags: 8},
				"pesto, eggplant": {bags: 8},
				"pesto, mint": {bags: 8},
				"pesto, jalapeno": {bags: 8},
				"jalapeno candy": {bags: 5},
				"tomato, dried": {bag: 7},  //Spelling???  Should be Dried, Tomato


				//Fresh
				"persimmons": {lbs: 5},
				"persimmon, frozen": {lbs: 5},
				"dried, persimmon": {lbs: 5},

				"eggs": {each: 11}
			};

			priceMap[2015] = {
				oz4: 6,
				oz8: 10,
				oz12: 13,
				oz16: 10,
				oz32: 15,
				"blackberry jam": {oz4: 7, oz8: 12},
				"raspberry jam": {oz4: 7, oz8: 12},
				"blackberry vanilla": {oz4: 7, oz8: 12},
				"bloody mary mix": {oz16: 13},
				"pickled beets": {oz16: 15},
				"tomato juice cocktail": {oz16: 8},
				"fava bean soup": {oz32: 20},
				"kimchi": {oz16: 10},
				"kraut - red & white": {oz16: 10},
				"bread & butter pickles": {oz16: 10},
				"pickled eggs": {oz16: 15},

				"3 pack": {each: 18},
				"leather": {each: 6},
				"leather, apple": {each: 6},
				"leather, grape": {each: 6},
				"leather, peach": {each: 6},
				"leather, persimmon": {each: 6},
				"leather, pumpkin": {each: 6},
				"leather, strawberry": {each: 6},
				"leather, quince": {each: 6},
				"membrillo": {each: 6},
				"membrillo candy": {each: 2.5},
				"popsicles": {each: 5},
				"spices": {each: 4},
				"spices, basil/coriander": {each: 4},
				"spices, fennel": {each: 4},
				"spices, other": {each: 4},
				"spices, pepper": {each: 4},
				"spices, smoked": {each: 4},

				"baba ganoush": {bag: 8, oz4: 8},
				"dried, pear": {bag: 6},  //Price??
				"dried, tomatillo": {bag: 6},  //Price??
				"dried, strawberry": {bag: 7.5},
				"dried, tomato": {bag: 7},
				"jalapeno candy": {bag: 5},

				"eggs": {each: 10},
			};

			//Log errors, but keep on chugging.
			if(vendorId == undefined) {
				softErrors.push("ERROR: Unexpected vendor: " + vendor);
			}
			else if(itemId == undefined) {
				softErrors.push("ERROR: Unexpected item: " + item);
			}
			else {
				//Split it into multiple sales entries, one for each measure that has a positive value.
				if(oz32 > 0) {
					var measureId = measureIdMap['32 oz'];
					var price = priceMap[year][item];

					if(price == undefined) {
						price = priceMap[year]['oz32'];
					}

					saleQueries.push(models.Sale.create({date: date, vendorId: vendorId, itemId: itemId, measureId: measureId, amount: oz32, price: price}));
				}

				if(oz16 > 0) {
					var measureId = measureIdMap['16 oz'];
					var price = priceMap[year][item];

					if(price == undefined) {
						price = priceMap[year]['oz16'];
					}

					saleQueries.push(models.Sale.create({date: date, vendorId: vendorId, itemId: itemId, measureId: measureId, amount: oz32, price: price}));
				}

				if(oz12 > 0) {
					var measureId = measureIdMap['12 oz'];
					var price = priceMap[year][item];

					if(price == undefined) {
						price = priceMap[year]['oz12'];
					}

					saleQueries.push(models.Sale.create({date: date, vendorId: vendorId, itemId: itemId, measureId: measureId, amount: oz32, price: price}));
				}

				if(oz8 > 0) {
					var measureId = measureIdMap['8 oz'];
					var price = priceMap[year][item];

					if(price == undefined) {
						price = priceMap[year]['oz8'];
					}

					saleQueries.push(models.Sale.create({date: date, vendorId: vendorId, itemId: itemId, measureId: measureId, amount: oz32, price: price}));
				}

				if(oz4 > 0) {
					var measureId = measureIdMap['4 oz'];
					var price = priceMap[year][item];

					if(price == undefined) {
						price = priceMap[year]['oz4'];
					}

					saleQueries.push(models.Sale.create({date: date, vendorId: vendorId, itemId: itemId, measureId: measureId, amount: oz32, price: price}));
				}

				if(bags > 0) {
					var measureId = measureIdMap['bags'];
					var price = priceMap[year][item];

					if(price == undefined) {
						price = priceMap[year]['bags'];
					}

					saleQueries.push(models.Sale.create({date: date, vendorId: vendorId, itemId: itemId, measureId: measureId, amount: oz32, price: price}));
				}

				if(each > 0) {
					var measureId = measureIdMap['each'];
					var price = priceMap[year][item];

					if(price == undefined) {
						price = priceMap[year]['each'];
					}

					saleQueries.push(models.Sale.create({date: date, vendorId: vendorId, itemId: itemId, measureId: measureId, amount: oz32, price: price}));
				}

				Promise.each(saleQueries, function(value, index, length) {
					//Ignored.
				}).then(function(result) {
					//Recursively read rows until there are no more rows to read.
					if(rowIndex + 1 < data.length) readRow(rowIndex + 1);
					else resolve();
				});
			}
		}

		if(fs.existsSync(fileName)) {
			csv.read(fileName, function(error, csvData) {
				if(error) console.log(error);
				else {
					data = csvData;
					//Collect the mapping data.
					collectMetadata();

					//Read or create the required models to make this all work:
					Promise.each([
						//Measures 1-6
						models.Measure.find({where: {name: 'Jar 32oz'}}),
						models.Measure.find({where: {name: 'Jar 16oz'}}),
						models.Measure.find({where: {name: 'Jar 12oz'}}),
						models.Measure.find({where: {name: 'Jar 8oz'}}),
						models.Measure.find({where: {name: 'Jar 4oz'}}),
						models.Measure.find({where: {name: 'Each'}}),
						models.Measure.find({where: {name: 'Bags'}}),
						//Vendors 7-16
						models.Venue.find({where: {name: 'Boonville'}}),
						models.Venue.find({where: {name: 'Clement St'}}),
						models.Venue.find({where: {name: 'Ukiah'}}),
						models.Venue.find({where: {name: 'Mendocino'}}),
						models.Venue.find({where: {name: 'Ft Bragg'}}),
						models.Venue.find({where: {name: 'On Farm'}}),
						models.Venue.find({where: {name: 'Unknown Restaurant'}}),
						models.Venue.find({where: {name: 'Yorkville Market'}}),
						models.Venue.find({where: {name: 'Yorkville Cellars'}}),
						models.Venue.find({where: {name: 'Mail Order'}}),
						//Items
						models.Item.findAll()
					], function(value, index, length) {
						switch(index) {
							case 0:
								measureIdMap['32 oz'] = value.id;
								break;
							case 1:
								measureIdMap['16 oz'] = value.id;
								break;
							case 2:
								measureIdMap['12 oz'] = value.id;
								break;
							case 3:
								measureIdMap['8 oz'] = value.id;
								break;
							case 4:
								measureIdMap['4 oz'] = value.id;
								break;
							case 5:
								measureIdMap['each'] = value.id;
								break;
							case 6:
								measureIdMap['bags'] = value.id;
								break;
							case 7:
								vendorIdMap['bv'] = value.id;
								break;
							case 8:
								vendorIdMap['sf'] = value.id;
								break;
							case 9:
								vendorIdMap['uk'] = value.id;
								break;
							case 10:
								vendorIdMap['men'] = value.id;
								break;
							case 11:
								vendorIdMap['fb'] = value.id;
								break;
							case 12:
								vendorIdMap['of'] = value.id;
								break;
							case 13:
								vendorIdMap['res'] = value.id;
								break;
							case 14:
								vendorIdMap['ym'] = value.id;
								break;
							case 15:
								vendorIdMap['yc'] = value.id;
								break;
							case 16:
								vendorIdMap['mo'] = value.id;
								break;
							case 17:
								//Iterate over all the items and setup the itemIdMap to reference the item id given the item name.  Item names are unique.
								for(var i = 0; i < value.length; i++) {
									itemIdMap[value[i].name] = value[i].id;
								}
						}
					}).then(function() {
						//Read the first row.
						readRow(1);
					});
				}
			});
		}
		else {
			console.log("Cannot find " + fileName);
		}
});

p.then(function() {console.log("Import Complete!")}).error(function(error) {console.log("Ran into an error: \n" + error)});
// };