namespace OSMDatastructure;

public class OsmEdge
{
    public Coordinates neighborCoordinates { get; }
    public readonly Dictionary<tagType, object> tags = new();

    public OsmEdge(float lat, float lon)
    {
        this.neighborCoordinates = new Coordinates(lat, lon);
        this.tags = new();
    }
    
    public OsmEdge(Coordinates neighborCoordinates)
    {
        this.neighborCoordinates = neighborCoordinates;
        this.tags = new();
    }

    public OsmEdge(float lat, float lon, Dictionary<tagType, object> tags)
    {
        this.neighborCoordinates = new Coordinates(lat, lon);
        //To prevent "EMPTY" tags 
        foreach (KeyValuePair<tagType, object> tag in tags)
        {
            if(tag.Key != tagType.EMPTY)
                this.tags.Add(tag.Key, tag.Value);
        }
    }

    public OsmEdge(Coordinates neighborCoordinates, Dictionary<tagType, object> tags)
    {
        this.neighborCoordinates = neighborCoordinates;
        //To prevent "EMPTY" tags 
        foreach (KeyValuePair<tagType, object> tag in tags)
        {
            if(tag.Key != tagType.EMPTY)
                this.tags.Add(tag.Key, tag.Value);
        }
    }

    public enum tagType : byte
    {
        highway, oneway, footway, sidewalk, cycleway, busway, forward, maxspeed, name, surface, lanes, access, tracktype, id, EMPTY
    }

    public static Dictionary<wayType, byte> speedcar = new() {
        { wayType.NONE, 0 },
        { wayType.motorway, 110 },
        { wayType.trunk, 100 },
        { wayType.primary, 80 },
        { wayType.secondary, 80 },
        { wayType.tertiary, 70 },
        { wayType.unclassified, 20 },
        { wayType.residential, 10 },
        { wayType.motorway_link, 50 },
        { wayType.trunk_link, 50 },
        { wayType.primary_link, 30 },
        { wayType.secondary_link, 25 },
        { wayType.tertiary_link, 25 },
        { wayType.living_street, 10 },
        { wayType.service, 0 },
        { wayType.pedestrian, 0 },
        { wayType.track, 0 },
        { wayType.bus_guideway, 0 },
        { wayType.escape, 0 },
        { wayType.raceway, 0 },
        { wayType.road, 25 },
        { wayType.busway, 0 },
        { wayType.footway, 0 },
        { wayType.bridleway, 0 },
        { wayType.steps, 0 },
        { wayType.corridor, 0 },
        { wayType.path, 0 },
        { wayType.cycleway, 0 },
        { wayType.construction, 0 }
    };

    public static Dictionary<wayType, byte> speedped = new() {
        { wayType.NONE, 0 },
        { wayType.motorway, 0 },
        { wayType.trunk, 0 },
        { wayType.primary, 0 },
        { wayType.secondary, 0 },
        { wayType.tertiary, 0 },
        { wayType.unclassified, 1 },
        { wayType.residential, 3 },
        { wayType.motorway_link, 0 },
        { wayType.trunk_link, 0 },
        { wayType.primary_link, 0 },
        { wayType.secondary_link, 0 },
        { wayType.tertiary_link, 0 },
        { wayType.living_street, 5 },
        { wayType.service, 2 },
        { wayType.pedestrian, 5 },
        { wayType.track, 0 },
        { wayType.bus_guideway, 0 },
        { wayType.escape, 0 },
        { wayType.raceway, 0 },
        { wayType.road, 3 },
        { wayType.busway, 0 },
        { wayType.footway, 4 },
        { wayType.bridleway, 1 },
        { wayType.steps, 2 },
        { wayType.corridor, 3 },
        { wayType.path, 4 },
        { wayType.cycleway, 2 },
        { wayType.construction, 0 }
    };
    public enum wayType : byte { NONE, motorway, trunk, primary, secondary, tertiary, unclassified, residential, motorway_link, trunk_link, primary_link, secondary_link, tertiary_link, living_street, service, pedestrian, track, bus_guideway, escape, raceway, road, busway, footway, bridleway, steps, corridor, path, cycleway, construction }

    public enum speedType { pedestrian, car, road }

    public void AddTag(string key, string value)
    {
        KeyValuePair<tagType, object> tag = ConvertToTag(key, value);
        if(tag.Key != tagType.EMPTY)
            this.tags.Add(tag.Key, tag.Value);
    }

    public static KeyValuePair<tagType, object> ConvertToTag(string key, string value)
    {
        switch (key)
        {
            case "highway":
                try
                {
                    return new KeyValuePair<tagType, object>(tagType.highway, (wayType)Enum.Parse(typeof(wayType), value, true));
                }
                catch (ArgumentException)
                {
                    return new KeyValuePair<tagType, object>(tagType.highway, wayType.unclassified);
                }
            case "maxspeed":
                try
                { 
                    return new KeyValuePair<tagType, object>(tagType.maxspeed, Convert.ToByte(value));
                }
                catch (Exception)
                {
                    //Console.WriteLine(e);
                    //Console.WriteLine("Continuing...");
                    return new KeyValuePair<tagType, object>(tagType.maxspeed, byte.MaxValue);
                }
            case "oneway":
                switch (value)
                {
                    case "yes":
                        return new KeyValuePair<tagType, object>(tagType.oneway, true);
                    case "-1":
                        return new KeyValuePair<tagType, object>(tagType.forward, false);
                    case "no":
                        return new KeyValuePair<tagType, object>(tagType.oneway, false);
                }
                break;
            case "id":
                return new KeyValuePair<tagType, object>(tagType.id, Convert.ToUInt64(value));
        }
        return new KeyValuePair<tagType, object>(tagType.EMPTY, 0);
    }

    public ulong GetId()
    {
        return this.tags.ContainsKey(tagType.id) ? (ulong)this.tags[tagType.id] : 0;
    }

    public wayType GetHighwayType()
    { 
        return this.tags.ContainsKey(tagType.highway) ? (wayType)this.tags[tagType.highway] : wayType.NONE;
    }

    public bool IsOneWay()
    {
        return this.tags.ContainsKey(tagType.oneway) && (bool)this.tags[tagType.oneway];
    }

    public byte? GetMaxSpeed(speedType type)
    {
        if(type == speedType.road)
        {
            return this.tags.ContainsKey(tagType.maxspeed) ? (byte)this.tags[tagType.maxspeed] : null;
        }
        if(type == speedType.car)
        {
            return this.tags.ContainsKey(tagType.maxspeed)
                ? (byte)this.tags[tagType.maxspeed]
                : speedcar[this.GetHighwayType()];
        }
        return speedped[this.GetHighwayType()];
    }

    public bool IsForward()
    {
        return this.tags.ContainsKey(tagType.forward) && (bool)this.tags[tagType.forward];
    }
}