package tdt4140.gr1855.app.core;

import java.util.Arrays;
import java.util.List;

/**
 * This is an astract class that will be used by both Doctor and Patient class, since they will share several fields, methods
 * and constructor logic
 */
public abstract class AbstractUser {
	private String username;
	private String password;
	private String name;
	private int phoneNumber;

	//liste over gyldige landskoder
	private List<String> validCTLDs = Arrays.asList("ad", "ae", "af","com", "ag", "ai", "al", "am", "ao", "aq", "ar", "as", "at", "au", "aw", "ax", "az", "ba", "bb", "bd", "be", "bf", "bg", "bh", "bi", "bj", "bl", "bm", "bn", "bo", "bq", "br", "bs", "bt", "bv", "bw", "by", "bz", "ca", "cc", "cd", "cf", "cg", "ch", "ci", "ck", "cl", "cm", "cn", "co", "cr", "cu", "cv", "cw", "cx", "cy", "cz", "de", "dj", "dk", "dm", "do", "dz", "ec", "ee", "eg", "eh", "er", "es", "et", "fi", "fj", "fk", "fm", "fo", "fr", "ga", "gb", "gd", "ge", "gf", "gg", "gh", "gi", "gl", "gm", "gn", "gp", "gq", "gr", "gs", "gt", "gu", "gw", "gy", "hk", "hm", "hn", "hr", "ht", "hu", "id", "ie", "il", "im", "in", "io", "iq", "ir", "is", "it", "je", "jm", "jo", "jp", "ke", "kg", "kh", "ki", "km", "kn", "kp", "kr", "kw", "ky", "kz", "la", "lb", "lc", "li", "lk", "lr", "ls", "lt", "lu", "lv", "ly", "ma", "mc", "md", "me", "mf", "mg", "mh", "mk", "ml", "mm", "mn", "mo", "mp", "mq", "mr", "ms", "mt", "mu", "mv", "mw", "mx", "my", "mz", "na", "nc", "ne", "nf", "ng", "ni", "nl", "no", "np", "nr", "nu", "nz", "om", "pa", "pe", "pf", "pg", "ph", "pk", "pl", "pm", "pn", "pr", "ps", "pt", "pw", "py", "qa", "re", "ro", "rs", "ru", "rw", "sa", "sb", "sc", "sd", "se", "sg", "sh", "si", "sj", "sk", "sl", "sm", "sn", "so", "sr", "ss", "st", "sv", "sx", "sy", "sz", "tc", "td", "tf", "tg", "th", "tj", "tk", "tl", "tm", "tn", "to", "tr", "tt", "tv", "tw", "tz", "ua", "ug", "um", "us", "uy", "uz", "va", "vc", "ve", "vg", "vi", "vn", "vu", "wf", "ws", "ye", "yt", "za", "zm", "zw");

	public AbstractUser(String name, String username, String password, int phoneNumber) {
		setName(name);
		setPhoneNumber(phoneNumber);
		setusername(username);
		setPassword(password);
	}
	public int getPhoneNumber() {
		return phoneNumber;
	}
	public void setPhoneNumber(int phoneNumber) {
		//calls checkValidName, that returns a String that is null. If there emerges an error, the error message will be returned

				String error = checkValidPhoneNumber(phoneNumber);

				//return what went wrong if name is unvalid
				if (error != null) {
					throw new IllegalArgumentException("Error: " + error);
				}
				//If name was valid, sets phone number
				this.phoneNumber = phoneNumber;
	}

	public void setName(String name) {
		//calls checkValidName, that returns a String that is null. If there emerges an error, the error message will be returned
		String error = checkValidName(name);

		//return what went wrong if name is unvalid
		if (error != null) {
			throw new IllegalArgumentException("Error: " + error);
		}
		//If name was valid, sets name
		this.name = name;
	}
	public String getUsername() {
		return username;
	}
	public void setusername(String username) {
		//calls checkValidusername, that returns a String that is null. If there emerges an error, the error message will be returned

		String error = checkValidusername(username);

		//return what went wrong if username is unvalid
				if (error != null) {
					throw new IllegalArgumentException("Error: " + error);
				}

		this.username = username;
	}


	public String getPassword() {
		return password;
	}

	//set password
	public void setPassword(String password) {
	//calls checkValidPassword, that returns a String that is null. If there emerges an error, the error message will be returned

				String error = checkValidPassword(password);

				//return what went wrong if password is unvalid
						if (error != null) {
							throw new IllegalArgumentException("Error: " + error);
						}

				this.password=password;
	}
	public String getName() {
		return name;
	}

	//Helping method for checking valid name
	private String checkValidName(String name) {
		String[] nameSplitter = name.split(" ");
		if (nameSplitter.length <2) {
			return "Name must consist of one first name and one last name";
		}
		for(int i=0; i<nameSplitter.length;i++) {
			if(nameSplitter[i].length()<2) {
				return "All parts of name must have at least two letters";
			}
			if(!isLettersOnly(nameSplitter[i])) {
				return "Name can only consist of letters";
			}
			if(!Character.isUpperCase(nameSplitter[i].charAt(0))){
				return "All parts of name must start with a capital letter";
			}
			for(int j=1; j<nameSplitter[i].length();j++) {
				if(Character.isUpperCase(nameSplitter[i].charAt(j))){
					return "There can't be a capital letter inside a name";
				}
			}
		}

		return null;
	}

	//Helping method for checking that a word only contains letters
	private boolean isLettersOnly(String s) {
		for(int i=0; i<s.length(); i++) {
			if (! Character.isLetter(s.charAt(i))) {
				return false;
			}
		}
		return true;
	}

	//Helping method for checking valid username (email)
	private String checkValidusername(String username) {
		String[] parts = username.split("@");
		if(username.equals("Give me an easter egg")) {
			return "Congratulations! An Easter egg has appeared!";
		}
		if(parts.length==0) {
			return "Your username can't just be @";
		}
		if(username.charAt(username.length()-1)=='@') {
			return "Username must be a complete email-adress, and thus can't end with @";
		}
		if(username.equals("")) {
			return "Please fill in username";
		}
		if(parts.length==1) {
			return "Your username must have a @";
		}

		if (parts.length > 2) {
			return "Your username " + username + " must only have one @";
		}

		String[] domainParts = parts[1].split("\\.");
		if (domainParts.length != 2) {
			return "Donamin part of username must consist of two parts, seperatetd by a '.'";
		}

		if (! isLettersOrDigitsOnly(domainParts[0])) {
			return "First part of email can only consist of letters and numbers";
		}
		int countryCodeLength = domainParts[1].length();
		if (! (countryCodeLength == 2 || countryCodeLength == 3)) {
			return "Country part of domain must cosist of two or three letters";
		}
		if (! isLettersOnly(domainParts[1])) {
			return "Country part of domain can only consist of letters";
		}
		if (! validCTLDs.contains(domainParts[1])){
			return "Unknown country part in domain";
		}
		return null;
	}

	//Helping method for checking that word consist of only letters and numbers
	private boolean isLettersOrDigitsOnly(String s) {
		for(int i=0; i<s.length(); i++) {
			if (! Character.isLetterOrDigit(s.charAt(i))) {
				return false;
			}
		}
		return true;
	}


	private String checkValidPhoneNumber(int phoneNumber) {
		if(!((phoneNumber>39999999&&phoneNumber<50000000)||(phoneNumber>89999999 && phoneNumber <100000000))) {
			return "Mobile number must consist of 8 digits and start with 4 or 9";
		}
		return null;
	}

	//Checks valid password: length at least 8, at least one small letter, at least one capital letter, and at least one digit
	private String checkValidPassword(String password) {
		if(password.length()<8) {
			return "Password must have have length 8 or more";
		}

		//Using booleans for at least one small letter, capital letter, number
		boolean minstEnBokstav=false;
		boolean minstEtTall=false;
		boolean minstEnLitenBokstav=false;
		boolean minstEnStorBokstav=false;
		for(int i=0; i<password.length(); i++) {
			if (Character.isDigit(password.charAt(i))) {
				minstEtTall=true;
			}
			if (Character.isLetter((password.charAt(i)))){
				minstEnBokstav=true;
				if(Character.isUpperCase((password.charAt(i)))){
					minstEnStorBokstav=true;
				}
				if(Character.isLowerCase((password.charAt(i)))) {
					minstEnLitenBokstav=true;
				}
			}
		}
		if(!minstEnBokstav) {
			return "Password must at least consist of one small letter";
		}
		if(!minstEtTall) {
			return "Password must consist of at least one number";
		}
		if(!minstEnLitenBokstav) {
			return "Password must consist of at least on small letter";
		}
		if(!minstEnStorBokstav) {
			return "Password must consist of at least on capital letter";
		}
		return null;
	}

	//toString for simpler testing with a main class
		public String toString() {
			return "" + this.getName();
		}

}