using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using TMPro;
using UnityEngine.UI;
using System;
using Unity.VisualScripting;
using System.Numerics;
using Vector3 = UnityEngine.Vector3;
using UnityEditor.Rendering;

public class City : MonoBehaviour
{
    public static City Instance { get; private set; }
    void Awake()
    {
        Instance = this;
    }
    private string[] weekDay = new string[]
    {
        "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
    };
    public string curDay;
    public float curTime;
    private bool timeSpeedUp = false; // Flag to check if time is sped up
    private float timeMultiplier = 1f; // Multiplier for time speed
    private float sunriseTime = 21600f; // 6:00 AM in seconds (6 * 3600)
    [SerializeField] GameObject sunriseTarget; // Reference to the sunrise target object for rotation
    private float sunsetTime = 72000f; // 8:00 PM in seconds (20 * 3600)
    [SerializeField] GameObject sunsetTarget; // Reference to the sunset target object for rotation
    private float noonTime = 43200f; // 12:00 PM in seconds (12 * 3600)
    [SerializeField] GameObject noonTarget; // Reference to the noon target object for rotation
    private float minIntensity = 0.1f; // Minimum light intensity (night)
    private float maxIntensity = 2f; // Maximum light intensity (noon)
    [SerializeField]
    private Light sunlight; // Reference to the sunlight light source
    [SerializeField] private GameObject sunTarget; // Reference to the sun target object for rotation
    // Removed legacy fields: maxPopulation, maxJobs, incomePerJob, faithPerChurch
    public TextMeshProUGUI moneyTxt;
    public TextMeshProUGUI dayText;
    public TextMeshProUGUI populationTxt;
    public TextMeshProUGUI jobsTxt;
    public TextMeshProUGUI foodTxt;
    public TextMeshProUGUI woodTxt;
    public TextMeshProUGUI steelTxt;
    public TextMeshProUGUI faithTxt;
    public TextMeshProUGUI waterTxt;
    public List<Building> buildings = new List<Building>();
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        UpdateWeekDay(); // Initialize curDay with the correct day name
        UpdateStats();
        timeSpeedUp = false; // Initialize timeSpeedUp to false
    }
    void Update()
    {
        // Set the time multiplier based on whether time is sped up
        timeMultiplier = timeSpeedUp ? 48f : 12f;
        // Update the current time
        UpdateCurrentTime();
        // Update the day cycle
        DayCycle();
        // Make the sunlight always aim at the moving sun target
        if (sunlight != null && sunTarget != null)
        {
            sunlight.transform.LookAt(sunTarget.transform.position);
        }
    }
    //called when placing a building
    public void OnPlaceBuilding(Building building)
    {
        // Apply the building preset stats
        buildings.Add(building);
        var preset = building.preset;
        // Loop through all resource types and add if value is not zero
        foreach (ResourceManager.ResourceTypes type in Enum.GetValues(typeof(ResourceManager.ResourceTypes)))
        {
            int value = GetResourceValueFromPreset(preset, type);
            if (value != 0)
            {
                ResourceManager.Instance.AddResource(type, value);
            }
        }
        UpdateStats();
    }

    // Helper method to get the value for a resource type from the preset
    private int GetResourceValueFromPreset(BuildingPreset preset, ResourceManager.ResourceTypes type)
    {
        switch (type)
        {
            case ResourceManager.ResourceTypes.Population: return preset.population;
            case ResourceManager.ResourceTypes.Jobs: return preset.jobs;
            case ResourceManager.ResourceTypes.Faith: return preset.faith;
            case ResourceManager.ResourceTypes.Food: return preset.food;
            case ResourceManager.ResourceTypes.Wood: return preset.wood;
            case ResourceManager.ResourceTypes.Steel: return preset.steel;
            case ResourceManager.ResourceTypes.Water: return preset.water;
            case ResourceManager.ResourceTypes.Money: return preset.cost;
            // Add more as needed
            default: return 0;
        }
    }
    //called when bulldozing a building
    public void OnRemoveBuilding(Building building)
    {
        // Subtract the building preset stats from resources
        var preset = building.preset;
        foreach (ResourceManager.ResourceTypes type in Enum.GetValues(typeof(ResourceManager.ResourceTypes)))
        {
            int value = GetResourceValueFromPreset(preset, type);
            if (value != 0)
            {
                ResourceManager.Instance.AddResource(type, -value);
            }
        }
        // Remove the building from the list and destroy it
        buildings.Remove(building);
        Destroy(building.gameObject);
        UpdateStats();
    }

    //update the stats text
    void UpdateStats()
    {
        moneyTxt.text = "$" + ResourceManager.Instance.GetResourceAmount(ResourceManager.ResourceTypes.Money).resourceAmount;
        populationTxt.text = ResourceManager.Instance.GetResourceAmount(ResourceManager.ResourceTypes.Population).resourceAmount.ToString();
        jobsTxt.text = ResourceManager.Instance.GetResourceAmount(ResourceManager.ResourceTypes.Jobs).resourceAmount.ToString();
        foodTxt.text = ResourceManager.Instance.GetResourceAmount(ResourceManager.ResourceTypes.Food).resourceAmount.ToString();
        woodTxt.text = ResourceManager.Instance.GetResourceAmount(ResourceManager.ResourceTypes.Wood).resourceAmount.ToString();
        steelTxt.text = ResourceManager.Instance.GetResourceAmount(ResourceManager.ResourceTypes.Steel).resourceAmount.ToString();
        faithTxt.text = ResourceManager.Instance.GetResourceAmount(ResourceManager.ResourceTypes.Faith).resourceAmount.ToString();
        waterTxt.text = ResourceManager.Instance.GetResourceAmount(ResourceManager.ResourceTypes.Water).resourceAmount.ToString();
    }

    //called when clicking "End Turn" button
    public void EndDay()
    {
        // Apply all per-day resource changes using ResourceManager
        ResourceManager.Instance.ApplyDailyResourceChanges();
        UpdateStats();
        UpdateWeekDay(); // Update the current day of the week
    }

    private void UpdateWeekDay()
    {
        if (curDay == null)
        {
            curDay = weekDay[0]; // Initialize with Sunday
        }
        else
        {
            int currentIndex = Array.IndexOf(weekDay, curDay);
            int nextIndex = (currentIndex + 1) % weekDay.Length; // Loop back to the start after Saturday
            curDay = weekDay[nextIndex];
        }
    }

    private float UpdateCurrentTime()
    {
        // Always use the current timeMultiplier based on timeSpeedUp
        float currentMultiplier = timeSpeedUp ? 48f : 12f;
        curTime += Time.deltaTime * 60 * currentMultiplier; // Update current time in seconds
        // Check if a full day has passed (86400 seconds)
        if (curTime >= 86400f) // 24 hours * 60 minutes * 60 seconds
        {
            curTime = 0f; // Reset the timer
            EndDay(); // Call the EndTurn method to process the end of the day
        }
        // Display the current time in hours and minutes
        int hours = (int)(curTime / 3600);
        int minutes = (int)((curTime % 3600) / 60);
        string currentDayName = curDay; // Use the current day name
        dayText.text = $"{currentDayName}\n{hours:D2}:{minutes:D2}";
        return curTime;
    }
    public void SpeedUpTime()
    {
        // Toggle the time speed up flag
        timeSpeedUp = !timeSpeedUp;
    }
    private void DayCycle()
    {
        if (sunlight == null || sunTarget == null) return;

        float intensity = minIntensity;
        Vector3 sunPosition = sunriseTarget.transform.position; // Default to sunrise

        if (curTime >= sunriseTime && curTime <= sunsetTime)
        {
            // Daytime period (6 AM to 8 PM)
            if (curTime <= noonTime)
            {
                // Sunrise to noon - intensity increases, sun moves from sunrise to noon position
                float t = (curTime - sunriseTime) / (noonTime - sunriseTime);
                intensity = Mathf.Lerp(minIntensity, maxIntensity, t);
                sunPosition = Vector3.Lerp(sunriseTarget.transform.position, noonTarget.transform.position, t);
            }
            else
            {
                // Noon to sunset - intensity decreases, sun moves from noon to sunset position
                float t = (curTime - noonTime) / (sunsetTime - noonTime);
                intensity = Mathf.Lerp(maxIntensity, minIntensity, t);
                sunPosition = Vector3.Lerp(noonTarget.transform.position, sunsetTarget.transform.position, t);
            }
        }
        else
        {
            // Nighttime period (8 PM to 6 AM)
            intensity = minIntensity;
            // During night, keep the sun at sunset position (sun is "below horizon")
            sunPosition = sunsetTarget.transform.position;
        }

        // Move the sun target and apply light intensity
        sunlight.transform.position = sunPosition;
        sunlight.intensity = intensity;
    }
}