using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using sam;

public class PointVariableSubsession : MonoBehaviour, IProductDataConsumer
{
    public Text prodNameText;
    public Text minValText;
    public Text maxValText;
    public Text varNameText;
    public Text scaleText;
    public Text curValText;
    public Text latText;
    public Text lonText;
    public Text dateText;

    public string dateFormat;
    public Color dataPointColor;
    [HideInInspector] public int initiallySelectedVariableIndex = 0;

    [HideInInspector] public ProductData data;
    [HideInInspector] public ProductProfile profile;
    [HideInInspector] public int variableIndex;
    [HideInInspector] public ProductVariable prodvar;

    [HideInInspector] public float scaleFactor = 100;
    public float scaleExponent = 2.0f;
    public float maxScaleFactor = 1000.0f;

    [HideInInspector] public DateTime curTime;
    public ProductDataPoint selectedDP = null;

    public ProductData GetSelectedProduct()
    {
        return data;
    }

    public void SetInitiallySelectedVariableIndex(int i)
    {
        initiallySelectedVariableIndex = i;
    }

    public void SelectProduct(ProductData pd)
    {
        data = pd;
        profile = data.profile;
        variableIndex = -1;
        prodvar = null;

        prodNameText.text = data.referenceProductName;
        BroadcastMessage("OnProductSelected", data, SendMessageOptions.DontRequireReceiver);

        string minString = pd.profile.variables[0].name;
        int minIndex = 0;
        for (int i = 1; i < pd.variables.Count; i++)
        {
            if (pd.profile.variables[i].name.CompareTo(minString) < 0)
            {
                minString = pd.profile.variables[i].name;
                minIndex = i;
            }
        }

        SelectVariable(/*minIndex*/initiallySelectedVariableIndex);
    }

    public void SelectVariable(int varInd)
    {
        if (varInd == variableIndex) return;

        variableIndex = varInd;
        prodvar = profile.variables[variableIndex];

        varNameText.text = prodvar.name;
        minValText.text = prodvar.ScaledMinValWithUnit();
        maxValText.text = prodvar.ScaledMaxValWithUnit();

        BroadcastMessage("OnVariableSelected", variableIndex, SendMessageOptions.DontRequireReceiver);
    }

    public void SetScaleFactor(float s)
    {
        scaleFactor = s;
        scaleText.text = s.ToString() + "x";
        BroadcastMessage("OnScaleFactorChanged", scaleFactor, SendMessageOptions.DontRequireReceiver);
    }

    public void OnScaleSliderAction(float f)
    {
        SetScaleFactor(maxScaleFactor * Mathf.Pow(f, scaleExponent));
    }

    public void SelectTimeStamp(DateTime t)
    {
        curTime = t;
        dateText.text = curTime.ToString(dateFormat);

        int i = SearchDataPoint(t);
        if (i < 0)
        {
            selectedDP = null;
            curValText.text = latText.text = lonText.text = "";
        }
        else
        {
            selectedDP = data.dataPoints[i];

            if (selectedDP.varValid[variableIndex])
                curValText.text = selectedDP.variables[variableIndex].ToString() + " " + prodvar.unit;
            else
                curValText.text = "";

            latText.text = "Lat: " + Utils.FormatLatitude(selectedDP.latitude);
            lonText.text = "Lon: " + Utils.FormatLongitude(selectedDP.longitude);
        }

        BroadcastMessage("OnTimeStampChanged", curTime, SendMessageOptions.DontRequireReceiver);
    }

    int SearchDataPoint(DateTime t)
    {
        ProductDataPoint dp = new ProductDataPoint {time = t};
        return data.dataPoints.BinarySearch(dp, new CompareDataPoints());
    }

    public class CompareDataPoints : IComparer<ProductDataPoint>
    {
        public int Compare(ProductDataPoint dp1, ProductDataPoint dp2)
        {
            return DateTime.Compare(dp1.time, dp2.time);
        }
    }

    public virtual Color GetDataPointColor(ProductDataPoint dp)
    {
        return dataPointColor;
    }
}