using System;
using System.Collections.Generic;
using System.Text;
using SalsaModel.Actions;
using SalsaModel.Scheduling;

namespace SalsaModel.Sequences
{
    [Sequence("Open Hold Demo")]
    class OpenHoldDemo : ISequenceProvider
    {
        public void AddMoves(SalsaModel.Scheduling.TimeLine timeline, double startTime, SalsaMover boy, SalsaMover girl)
        {
            DoIt(timeline, startTime, boy, girl, PositionModel.Side.Right, new Hold(GrabBy.Nothing, GrabBy.LeftHand));
            DoIt(timeline, startTime + 8, boy, girl, PositionModel.Side.Left, new Hold(GrabBy.RightHand, GrabBy.Nothing));
            DoIt(timeline, startTime + 16, boy, girl, PositionModel.Side.Right, new Hold(GrabBy.Nothing, GrabBy.RightHand));
            DoIt(timeline, startTime + 24, boy, girl, PositionModel.Side.Right, new Hold(GrabBy.RightHand, GrabBy.LeftHand));
        }

        private static void DoIt(SalsaModel.Scheduling.TimeLine timeline, double startTime, SalsaMover boy, SalsaMover girl, PositionModel.Side leaderHoldSide, Hold hold)
        {
            PositionModel.Side followerHoldSide = hold.GetHandSide(leaderHoldSide);
            double high = girl.Body.Trunk;

            {
                double x = getnaturalXPos(leaderHoldSide, followerHoldSide);

                MoveHandAndFollow(timeline, startTime + 0.0, 1.0, boy, leaderHoldSide, girl, hold, new Location(x, 30, high), PositionModel.Side.Left, -15);
                MoveHandAndFollow(timeline, startTime + 1.0, 1.0, boy, leaderHoldSide, girl, hold, new Location(x, 30, 15), PositionModel.Side.Right, -15);
                MoveHandAndFollow(timeline, startTime + 2.0, 2.0, boy, leaderHoldSide, girl, hold, new Location(x, 30, 15), PositionModel.Side.Left, 20);
                MoveHandAndFollow(timeline, startTime + 4.0, 1.0, boy, leaderHoldSide, girl, hold, new Location(x, 30, 15), PositionModel.Side.Right, 15);
                MoveHandAndFollow(timeline, startTime + 5.0, 1.0, boy, leaderHoldSide, girl, hold, new Location(x, 30, high), PositionModel.Side.Left, 15);
                MoveHandAndFollow(timeline, startTime + 6.0, 1.8, boy, leaderHoldSide, girl, hold, new Location(x, 30, high), PositionModel.Side.Right, -20);
            }
        }

        private static double getnaturalXPos(PositionModel.Side leaderHoldSide, PositionModel.Side followerHoldSide)
        {
            double x;
            if (leaderHoldSide == followerHoldSide)
            {
                x = 0;
            }
            else
            {
                x = 10;
                if (leaderHoldSide == PositionModel.Side.Right)
                    x *= -1;
            }
            return x;
        }

        public static void MoveHandAndFollow(TimeLine timeline, double start, double duration, SalsaMover leader, PositionModel.Side leaderHoldSide, SalsaMover follower, Hold hold, Location leaderHoldPos, PositionModel.Side leaderStepSide, double distance)
        {
            PositionModel.Side followerHoldSide = hold.GetHandSide(leaderHoldSide);
            timeline.Add(start, duration, new MoveFootAction(leader, leaderStepSide, distance));
            CubanMotionAction toFollow = new CubanMotionAction(leader, leaderStepSide, distance, 0);
            timeline.Add(start, duration, toFollow);
            timeline.Add(start, duration, new MoveHand(leaderHoldSide, leader, leaderHoldPos));
            timeline.Add(start, duration, new LeadWithHand(follower, leader, toFollow, PositionModel.Other(leaderStepSide), followerHoldSide, leaderHoldPos));

            if (hold.GetOther(leaderHoldSide) != GrabBy.Nothing)
            {
                PositionModel.Side leaderNonLeadHand = PositionModel.Other(leaderHoldSide);
                PositionModel.Side followerNonLeadHand = hold.GetHandSide(leaderNonLeadHand);

                timeline.Add(start, duration, new MoveHand(leaderNonLeadHand, leader, leaderHoldPos));
                timeline.Add(start, duration, new JustFollowWithHand(follower, followerNonLeadHand, leader, leaderNonLeadHand));
            }
        }
    }
}