using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;

namespace System.Speech {
    public class SpeechFormat {

        public static string Pronounce(string s) {
            // TODO
            s = s.Replace("0815", "0 8 15");
            return s;
        }

        public static string Regex_PersonReplace(Match m) {
            // TODO
            return "Unbekannt";
        }

        public static string Format(string s) {
            if (s.Contains("{now.")) {
                s = s.Replace("{now.hour}", DateTime.Now.Hour.ToString());
                s = s.Replace("{now.h}", DateTime.Now.Hour.ToString());
                s = s.Replace("{now.minute}", DateTime.Now.Minute.ToString());
                s = s.Replace("{now.i}", DateTime.Now.Minute.ToString());
                s = s.Replace("{now.second}", DateTime.Now.Second.ToString());
                s = s.Replace("{now.s}", DateTime.Now.Second.ToString());

                s = s.Replace("{now.day}", DateTime.Now.Day.ToString());
                s = s.Replace("{now.d}", DateTime.Now.Day.ToString());
                s = s.Replace("{now.month}", DateTime.Now.Month.ToString());
                s = s.Replace("{now.monthname}", getMonthName(DateTime.Now.Month));
                s = s.Replace("{now.m}", DateTime.Now.Month.ToString());
                s = s.Replace("{now.M}", getMonthName(DateTime.Now.Month));
                s = s.Replace("{now.year}", DateTime.Now.Year.ToString());
                s = s.Replace("{now.y}", DateTime.Now.Year.ToString());
                s = s.Replace("{now.w}", DayOfWeek(DateTime.Now.DayOfWeek));

                s = s.Replace("{now.datetime}", DayOfWeek(DateTime.Now.DayOfWeek)+", den " + DateTime.Now.Day.ToString() + "ten "+ getMonthName(DateTime.Now.Month)+" "+ DateTime.Now.Year.ToString() + " " + TimeFormat(DateTime.Now));
                s = s.Replace("{now.time}", TimeFormat(DateTime.Now));
                s = s.Replace("{now.date}", DayOfWeek(DateTime.Now.DayOfWeek) + ", den " + DateTime.Now.Day.ToString() + "ten " + getMonthName(DateTime.Now.Month) + " " + DateTime.Now.Year.ToString());
            }
            if (s.Contains("{person.")) {
                // TODO: Connect to addressbook, fetch data of person.(.+) and replace
                // Schema: {person.Patrick.phone}, {person.Patrick.Name}, ...
                s = Regex.Replace(s, "\\{person\\.(?<arg1>[.+?]+)\\.(?<arg2>.+?)(?:\\.(?<arg3>.+?))?\\}", Regex_PersonReplace);
            }
            if (s.Contains("{web")) {
                // TODO: Fetch web Data and return the value of a tag/id/class
                // Schema: To be decided
            }
            if (s.Contains("{system.")) {
                // TODO: System Variablen
            }

            if(s.Contains(":")) {
                s = System.Text.RegularExpressions.Regex.Replace(s, "(?<h>(?:0|1|2)?[0-9])\\:(?<m>[0-5][0-9])(?:\\:(?<s>[0-5][0-9]))?[\\s\\t\\n\\r]*(h|uhr)", "${h} Uhr ${m}", Text.RegularExpressions.RegexOptions.IgnoreCase | Text.RegularExpressions.RegexOptions.ExplicitCapture);
                s = System.Text.RegularExpressions.Regex.Replace(s, "(?<v1>[0-9]+)\\:(?<v2>[0-9]+)", "${v1} zu ${v2}", Text.RegularExpressions.RegexOptions.ExplicitCapture);
            }
            return s;
        }


        public static string getMonthName(int m) {
            switch (m) {
                case 1: return "Januar";
                case 2: return "Februar";
                case 3: return "März";
                case 4: return "April";
                case 5: return "Mai";
                case 6: return "Juni";
                case 7: return "Juli";
                case 8: return "August";
                case 9: return "September";
                case 10: return "Oktober";
                case 11: return "November";
                case 12: return "Dezember";
            }
            return "";
        }

        public static string DayOfWeek(DayOfWeek d) {
            switch (d) {
                case System.DayOfWeek.Monday: return "Montag";
                case System.DayOfWeek.Tuesday: return "Dienstag";
                case System.DayOfWeek.Wednesday: return "Mittwoch";
                case System.DayOfWeek.Thursday: return "Donnerstag";
                case System.DayOfWeek.Friday: return "Freitag";
                case System.DayOfWeek.Saturday: return "Samstag";
                case System.DayOfWeek.Sunday: return "Sonntag";
            }
            return "";
        }

        public static string TimeFormat(DateTime dt) {
            int m = dt.Minute;
            switch (m) {
                case 0: return "Punkt " + dt.Hour + " Uhr";
                case 1: return dt.Hour + " Uhr";
                case 15: return "Viertel nach " + dt.Hour;
                case 30:
                    if (dt.Hour == 11 || dt.Hour == 23) {
                        return "Halb zwölf";
                    } else {
                        return "Halb " + ((dt.Hour % 12) + 1);
                    }
                case 45:
                    return "Viertel vor " + ((dt.Hour % 12) + 1);
                case 50:
                    return "Zehn vor " + ((dt.Hour % 12) + 1);
                case 55:
                    return "Fünf vor " + ((dt.Hour % 12) + 1);
                case 58:
                case 59:
                    return "Kurz vor " + ((dt.Hour % 12) + 1);
                default:
                    if (m <= 10) {
                        return dt.Minute + " nach " + dt.Hour;
                    }
                    if(m>=50){
                        return (60 - dt.Minute) + " vor " + ((dt.Hour % 12) + 1);
                    }
                    return dt.Hour + " Uhr " + dt.Minute;
            }
        }
    }
}