package ac.ed.lurg;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Properties;

public class ModelConfig {
	
	private Properties configFile;
	private static ModelConfig modelConfig;
	public static final String CONFIG_FILE = System.getProperty("CONFIG_FILE");
	
	private ModelConfig() {
		configFile = new Properties();
		try {
			System.out.println("Config. file is " + CONFIG_FILE);
			if (CONFIG_FILE != null)
				configFile.load(new FileInputStream(CONFIG_FILE));
		}
		catch (IOException e) {
			System.err.println("Problems reading config file");
			System.err.println(e.getMessage());
		}
	}

	public static String getSetupDetails() {
		String buildVerion = System.getProperty("BUILDVER");
		StringBuffer sb = new StringBuffer("Build version: " + buildVerion + "\n");

		Properties props = getModelConfig().configFile;
		Enumeration<?> em = props.keys();
		while(em.hasMoreElements()) {
			String str = (String) em.nextElement();
			sb.append(str + ": " + props.get(str) + "\n");
		}

		return sb.toString();
	}
	
	private static ModelConfig getModelConfig() {
		if (modelConfig == null)
			modelConfig = new ModelConfig();

		return modelConfig;
	}
	
	private static String getProperty(String prop) {
		return getModelConfig().getProp(prop);
	}
	private static String getProperty(String prop, String defaultString) {
		String propValue = getProperty(prop);
		return propValue == null ? defaultString : propValue;
	}
	private String getProp(String prop) {
		return configFile.getProperty(prop);
	}
	
	private static Integer getIntProperty(String prop, Integer defaultInt) {
		Integer propValue = getModelConfig().getIntProp(prop);
		return propValue == null ? defaultInt : propValue;
	}
	private Integer getIntProp(String prop) {
		String v = configFile.getProperty(prop);
		return v==null ? null : Integer.valueOf(v);
	}
	
	@SuppressWarnings("unused")
	private static Long getLongProperty(String prop, Long defaultLong) {
		Long propValue = getModelConfig().getLongProp(prop);
		return propValue == null ? defaultLong : propValue;
	}
	private Long getLongProp(String prop) {
		String v = configFile.getProperty(prop);
		return v==null ? null : Long.valueOf(v);
	}
	
	private static Double getDoubleProperty(String prop, Double defaultDouble) {
		Double propValue = getModelConfig().getDoubleProp(prop);
		return propValue == null ? defaultDouble : propValue;
	}
	private Double getDoubleProp(String prop) {
		String v = configFile.getProperty(prop);
		return v==null ? null :  Double.valueOf(v);
	}
	
	private static Boolean getBooleanProperty(String prop, Boolean defaultBoolean) {
		return getModelConfig().getBooleanProp(prop, defaultBoolean);
	}
	private boolean getBooleanProp(String prop, Boolean defaultBoolean) {
		String v = configFile.getProperty(prop);
		return v==null ? defaultBoolean :  Boolean.valueOf(v);
	}

	public static final boolean SUPPRESS_STD_OUTPUT = getBooleanProperty("SUPPRESS_STD_OUTPUT", Boolean.FALSE);

	// Directory information
	public static final String BASE_DIR = getProperty("BASE_DIR");  // this must to be set in config file
	public static final String OUTPUT_DIR = getProperty("OUTPUT_DIR", BASE_DIR + File.separator + "output");
	public static final String TEMP_DIR = getProperty("TEMP_DIR", OUTPUT_DIR + File.separator + "GamsTmp");
	public static final String DATA_DIR = getProperty("DATA_DIR", BASE_DIR + File.separator + "data");
	public static final String GAMS_MODEL = getProperty("GAMS_MODEL", BASE_DIR + File.separator + "GAMS/IntExtOpt.gms");
	public static final boolean CLEANUP_GAMS_DIR = getBooleanProperty("CLEANUP_GAMS_DIR", false);

	// Country (non-gridded) data
	public static final String DEMAND_CURVES_FILE = DATA_DIR + File.separator + "com_curves.csv";
	public static final String SSP_FILE = DATA_DIR + File.separator + "ssp.csv";	
	public static final String BASELINE_CONSUMP_FILE = DATA_DIR + File.separator + "base_consump.csv";
	public static final String COUNTRY_CODES_FILE = DATA_DIR + File.separator + "country_codes4.csv";
	public static final String COUNTRY_DATA_FILE = DATA_DIR + File.separator + "country_data.csv";
	public static final String NET_IMPORTS_FILE = DATA_DIR + File.separator + "net_imports.csv";
	public static final String BIOENERGY_1GEN_BASE_DEMAND_FILE = DATA_DIR + File.separator + "bio_demand.csv";
	public static final String BIOENERGY_FUTURE_DEMAND_FILE = DATA_DIR + File.separator + "bioenergy_data_from_IMAGE_melt.csv";
	public static final String TRADE_BARRIERS_FILE = DATA_DIR + File.separator + "tradeBarriers.csv";
	public static final String STOCKS_FILE = DATA_DIR + File.separator + "global_stocks.csv";
	public static final String FAO_CONSUMPTION_FILE = DATA_DIR + File.separator + "fao_consump.csv";
	
	// yield data
	public static final String YIELD_DIR_BASE = getProperty("YIELD_DIR_BASE");
	public static final String YIELD_DIR_TOP = getProperty("YIELD_DIR_TOP");
	public static final String YIELD_DIR = getProperty("YIELD_DIR", YIELD_DIR_BASE + File.separator + YIELD_DIR_TOP);
	public static final int LPJG_MONITOR_TIMEOUT_SEC = getIntProperty("LPJG_MONITOR_TIMEOUT", 60*60*2);
	public static final String ANPP_FILENAME = getProperty("ANPP_FILENAME", "anpp.out");
	public static final String YIELD_FILENAME = getProperty("YIELD_FILENAME", "yield.out");
	public static final boolean PASTURE_FERT_RESPONSE_FROM_LPJ = getBooleanProperty("PASTURE_FERT_RESPONSE_FROM_LPJ", false);;

	public static final double CALIB_FACTOR_WHEAT = getDoubleProperty("CALIB_FACTOR_WHEAT", 0.986);
	public static final double CALIB_FACTOR_MAIZE = getDoubleProperty("CALIB_FACTOR_MAIZE", 0.625);
	public static final double CALIB_FACTOR_RICE = getDoubleProperty("CALIB_FACTOR_RICE", 1.105);
	public static final double CALIB_FACTOR_OILCROPS = getDoubleProperty("CALIB_FACTOR_OILCROPS", 0.554);
	public static final double CALIB_FACTOR_PULSES = getDoubleProperty("CALIB_FACTOR_PULSES", 0.615);
	public static final double CALIB_FACTOR_STARCHY_ROOTS = getDoubleProperty("CALIB_FACTOR_STARCHY_ROOTS", 6.221);
	
	public static final double CALIB_FACTOR_MISCANTHUS = getDoubleProperty("CALIB_FACTOR_MISCANTHUS", 2.7779);
	public static final double CALIB_FACTOR_SRC = getDoubleProperty("CALIB_FACTOR_SRC", Double.NaN);

	// Spatial (gridded) data
	public static final double CELL_SIZE_X = getDoubleProperty("CELL_SIZE_X", 0.5);
	public static final double CELL_SIZE_Y = getDoubleProperty("CELL_SIZE_Y", CELL_SIZE_X);
	public static final String SPATIAL_DIR_NAME = getProperty("SPATIAL_DIR_NAME", "halfdeg");
	public static final String SPATIAL_DATA_DIR = getProperty("SPATIAL_DATA_DIR", DATA_DIR + File.separator + SPATIAL_DIR_NAME);
	public static final String INITAL_LAND_COVER_FILENAME = getProperty("INITAL_LAND_COVER_FILENAME", "hurtt_2010.txt");
	public static final String INITAL_LAND_COVER_FILE = SPATIAL_DATA_DIR + File.separator + INITAL_LAND_COVER_FILENAME;
	public static final String COUNTRY_BOUNDARY_FILE = SPATIAL_DATA_DIR + File.separator + "country_boundaries.asc";
	public static final String IRRIGATION_COST_FILE = SPATIAL_DATA_DIR + File.separator + "irrigation_cost.asc";
	public static final String IRRIGATION_CONSTRAINT_FILE = SPATIAL_DATA_DIR + File.separator + "blue_water_available_pseudoCRU_rcp8p5_2004_2013_grid_allhdyro_mm.txt";
	public static final String IRRIG_MAX_WATER_FILENAME = getProperty("IRRIG_MAX_WATER_FILENAME", "gsirrigation.out");
	public static final String PROTECTED_AREAS_FILE = SPATIAL_DATA_DIR + File.separator + "protected_areas.txt";
	public static final String HIGH_SLOPE_AREAS_FILE = SPATIAL_DATA_DIR + File.separator + "maxcropfrac2.txt";

	// Output
	public static final String LAND_COVER_OUTPUT_FILE = OUTPUT_DIR + File.separator + "lc.txt";
	public static final String PRICES_OUTPUT_FILE = OUTPUT_DIR + File.separator + "prices.txt";
	public static final String DEMAND_OUTPUT_FILE = OUTPUT_DIR + File.separator + "demand.txt";
	public static final boolean OUTPUT_FOR_LPJG = getBooleanProperty("OUTPUT_FOR_LPJG", true);
	public static final boolean INTERPOLATE_OUTPUT_YEARS = getBooleanProperty("INTERPOLATE_OUTPUT_YEARS", true);
	
	// Calibration related stuff
	public static final boolean IS_CALIBRATION_RUN = getBooleanProperty("IS_CALIBRATION_RUN", false);
	public static final String SERIALIZED_LAND_USE_FILE = getProperty("SERIALIZED_LAND_USE_FILE", OUTPUT_DIR + File.separator + "landUseRaster.ser");
	public static final boolean MARKET_ADJ_PRICE = IS_CALIBRATION_RUN ? false : getBooleanProperty("MARKET_ADJ_PRICE", true);
	public static final boolean CHANGE_YIELD_DATA_YEAR = IS_CALIBRATION_RUN ? false : getBooleanProperty("CHANGE_YIELD_DATA_YEAR", true);
	public static final String CLUSTERED_YIELD_FILE = getProperty("CLUSTERED_YIELD_FILE", OUTPUT_DIR + File.separator + "cluster.asc");

	// Temporal configuration
	public static final int START_TIMESTEP = getIntProperty("START_TIMESTEP", 0);
	public static final int END_TIMESTEP = getIntProperty("END_TIMESTEP", 18);
	public static final int TIMESTEP_SIZE = getIntProperty("TIMESTEP_SIZE", 5);
	public static final int BASE_YEAR = getIntProperty("BASE_YEAR", 2010);

	// Import export limits
	public static final double ANNUAL_MAX_IMPORT_CHANGE = IS_CALIBRATION_RUN ? 0.0 : getDoubleProperty("ANNUAL_MAX_IMPORT_CHANGE", 0.02);
	public static final double MAX_IMPORT_CHANGE = IS_CALIBRATION_RUN ? 0.0 : getDoubleProperty("MAX_IMPORT_CHANGE", ANNUAL_MAX_IMPORT_CHANGE*TIMESTEP_SIZE);

	// Fertiliser application rates in kg/ha
	public static final double MIN_FERT_AMOUNT = getDoubleProperty("MIN_FERT_AMOUNT", 0.0);
	public static final double MID_FERT_AMOUNT = getDoubleProperty("MID_FERT_AMOUNT", 200.0);
	public static final double MAX_FERT_AMOUNT = getDoubleProperty("MAX_FERT_AMOUNT", 1000.0);
	public static final int FERT_AMOUNT_PADDING = getIntProperty("FERT_AMOUNT_PADDING", 4);;

	// Other model parameters
	public static final boolean CHANGE_DEMAND_YEAR = IS_CALIBRATION_RUN ? false : getBooleanProperty("CHANGE_DEMAND_YEAR", true);
	public static final double DIETARY_CLOSURE = getDoubleProperty("DIETARY_CLOSURE", 0.0); // Amount diet converges in DIETARY_CLOSURE_GDP_CHANGE rate of GDP shift
	public static final double DIETARY_CLOSURE_GDP_CHANGE = getDoubleProperty("DIETARY_CLOSURE_GDP_CHANGE", 2.0); // 2 is double of GDP
	public static final double DIETARY_CLOSURE_PARAM = getDoubleProperty("DIETARY_CLOSURE_PARAM", Math.log((1-DIETARY_CLOSURE))/DIETARY_CLOSURE_GDP_CHANGE); // Zero is no dietary closure, number specifies closure rate for changes in GDP per capita, e.g. Math.log(0.5)/2
	public static final String SSP_SCENARIO = getProperty("SSP_SCENARIO", "SSP1_v9_130325");

	public static final double PASTURE_HARVEST_FRACTION = getDoubleProperty("PASTURE_HARVEST_FRACTION", 0.5);
	public static final double MEAT_EFFICIENCY = getDoubleProperty("MEAT_EFFICIENCY", 1.0);  // 'meat' is includes feed conversion ratio already, this is tech. change or similar
	public static final double IRRIGIATION_EFFICIENCY = getDoubleProperty("IRRIGIATION_EFFICIENCY", 0.5);
	
	public static final double LAND_CHANGE_COST = getDoubleProperty("LAND_CHANGE_COST", 0.75);
	public static final double CROP_TO_PASTURE_COST_FACTOR = getDoubleProperty("CROP_TO_PASTURE_COST_FACTOR", 1.0);
	public static final double AGRI_LAND_EXPANSION_COST_FACTOR = getDoubleProperty("AGRI_LAND_EXPANSION_COST_FACTOR", 1.0);

	public static final double CROP_INCREASE_COST = getDoubleProperty("CROP_INCREASE_COST", 0.6 * LAND_CHANGE_COST * AGRI_LAND_EXPANSION_COST_FACTOR);
	public static final double PASTURE_DECREASE_COST = getDoubleProperty("PASTURE_DECREASE_COST", 0.25 * LAND_CHANGE_COST);
	public static final double CROP_DECREASE_COST = getDoubleProperty("CROP_DECREASE_COST", LAND_CHANGE_COST);
	public static final double PASTURE_INCREASE_COST = getDoubleProperty("PASTURE_INCREASE_COST", 0.1 * LAND_CHANGE_COST * CROP_TO_PASTURE_COST_FACTOR * AGRI_LAND_EXPANSION_COST_FACTOR);
	public static final double AGRI_EXPANSION_COST_BASE = getDoubleProperty("AGRI_EXPANSION_COST_BASE", 0.05 * LAND_CHANGE_COST * AGRI_LAND_EXPANSION_COST_FACTOR);
	public static final double AGRI_EXPANSION_COST_BASE_MANAGED_FOREST = getDoubleProperty("AGRI_EXPANSION_COST_BASE_MANAGED_FOREST", 0.3 * LAND_CHANGE_COST * AGRI_LAND_EXPANSION_COST_FACTOR);

	public static final double SEED_AND_WASTE_FRACTION = getDoubleProperty("SEED_AND_WASTE_FRACTION", 0.15);  

	public static final double TECHNOLOGY_CHANGE_ANNUAL_RATE = IS_CALIBRATION_RUN ? 0.0 : getDoubleProperty("TECHNOLOGY_CHANGE_ANNUAL_RATE", 0.0);
	public static final int TECHNOLOGY_CHANGE_START_STEP = getIntProperty("TECHNOLOGY_CHANGE_START_STEP", 0);
	
	public static final boolean USE_BIOENERGY_TRAJECTORY = getBooleanProperty("USE_BIOENERGY_TRAJECTORY", false);  // false is the old style, i.e. BIOENERGY_CHANGE_ANNUAL_RATE, BIOENERGY_CHANGE_START_YEAR and BIOENERGY_CHANGE_END_YEAR
	// original way to specify changes in bioenergy
	public static final double BIOENERGY_CHANGE_ANNUAL_RATE = IS_CALIBRATION_RUN ? 0.0 : getDoubleProperty("BIOENERGY_CHANGE_ANNUAL_RATE", 0.10); // 6.2/2.31/20
	public static final int BIOENERGY_CHANGE_START_YEAR = getIntProperty("BIOENERGY_CHANGE_START_YEAR", 2010);
	public static final int BIOENERGY_CHANGE_END_YEAR = getIntProperty("BIOENERGY_CHANGE_END_YEAR", 2060);
	// newer way
	public static final boolean ENABLE_GEN2_BIOENERGY = getBooleanProperty("ENABLE_GEN2_BIOENERGY", false);
	public static final String BIOENERGY_DEMAND_SCENARIO = getProperty("BIOENERGY_DEMAND_SCENARIO", "SSP2");

//	public static final double BIOENERGY_HEATING_VALUE_GJ_PER_T = getDoubleProperty("BIOENERGY_HEATING_VALUE_GJ_PER_T", 17.5); // GJ per t DM

	
	public static final double MARKET_LAMBA = getDoubleProperty("MARKET_LAMBA", 0.4); // controls international market price adjustment rate

	public static final double POPULATION_AGGREG_LIMIT = getDoubleProperty("POPULATION_AGGREG_LIMIT", 30.0);  // in millions, smaller countries are aggregated on a regional basis
	
	public static final double UNHANDLED_CROP_AREA = getDoubleProperty("UNHANDLED_CROP_AREA", 0.3);  // includes fruit veg forage crops set aside and failed crop
	
	public static final double OTHER_INTENSITY_COST = getDoubleProperty("OTHER_INTENSITY_COST", 0.4);
	public static final double OTHER_INTENSITY_PARAM = getDoubleProperty("OTHER_INTENSITY_PARAM", 3.22);

	public static final double IRRIG_COST_SCALE_FACTOR = getDoubleProperty("IRRIG_COST_SCALE_FACTOR", 0.0014);
	public static final double FERTILISER_COST_PER_T = getDoubleProperty("FERTILISER_COST_PER_T", 2.7); // $500/t, 18% N/t
	public static final double FERTILISER_MAX_COST = FERTILISER_COST_PER_T * MAX_FERT_AMOUNT/1000;
	
	public static final double DOMESTIC_PRICE_MARKUP = getDoubleProperty("DOMESTIC_PRICE_MARKUP", 1.0);
	public static final double TRANSPORT_LOSSES = getDoubleProperty("TRANSPORT_LOSSES", 0.05);  // in international trade
	public static final double TRANSPORT_COST = getDoubleProperty("TRANSPORT_COST", 0.3);  // 100 $/t  see Wheat Transportation Profile - USDA
	public static final double TRADE_BARRIER_FACTOR_DEFAULT = getDoubleProperty("TRADE_BARRIER_FACTOR_DEFAULT", 0.5);  // price factor in international trade, transport cost and real trade barriers
	public static final double TRADE_BARRIER_ADJ = getDoubleProperty("TRADE_BARRIER_ADJ", 1.0);
	public static final boolean ACTIVE_TRADE_BARRIERS = getBooleanProperty("ACTIVE_TRADE_BARRIERS", false);  // if set to true read in barrier information from file, otherwise use default as above

	public static final boolean PROTECTED_AREAS_ENABLED = getBooleanProperty("PROTECTED_AREAS_ENABLED", true);
	public static final double MIN_NATURAL_RATE = getDoubleProperty("MIN_NATURAL_RATE", 0.10);

	public static final boolean DEBUG_LIMIT_COUNTRIES = getBooleanProperty("DEBUG_LIMIT_COUNTRIES", false);
	public static final String DEBUG_COUNTRY_NAME = getProperty("DEBUG_COUNTRY_NAME", "United States of America");
	public static final double PASTURE_MAX_IRRIGATION_RATE = getDoubleProperty("DEFAULT_MAX_IRRIGATION_RATE", 50.0); // shouldn't need this but some areas crops don't have a value, but was causing them to be selected
	public static final int LPJG_TIMESTEP_SIZE = 5;
	
	public static final int NUM_YIELD_CLUSTERS = getIntProperty("NUM_YIELD_CLUSTERS", 500);
	public static final long RANDOM_SEED = getIntProperty("RANDOM_SEED", 1974329);  // any number will do
}