using System;
using System.Collections;
using System.Collections.Generic;
using Kill.Bluetooth.Protocol;
using Kill.Managers;
using UnityEngine;
using UnityEngine.UI;

namespace Kill.UI.Pages
{
    public class HomePageSchedule : MonoBehaviour
    {
        ScheduleTask[] tasks;
        public Image scheduleIcon;
        /// <summary>
        /// 定时任务图标 0：未设置 1：已设置
        /// </summary>
        public Sprite[] scheduleIconSprites;
        public Text scheduleText;

        // 多语言Key
        private const string LANG_STANDBY = "100094";      // Standby 待机
        private const string LANG_SCAN = "100095";         // Scan 扫描
        private const string LANG_ARMED = "100096";        // Armed 消杀
        private const string LANG_NO_SCHEDULE = "100101";  // No Schedule 无定时任务

        public void Init(ScheduleTask[] tasks)
        {
            this.tasks = tasks;
            UpdateScheduleDisplay();
        }

        /// <summary>
        /// 更新定时任务显示
        /// </summary>
        private void UpdateScheduleDisplay()
        {
            // 获取今天的星期几（0=周日, 1=周一, ... 6=周六）
            DayOfWeek today = DateTime.Now.DayOfWeek;
            byte todayFlag = GetDayFlag(today);

            // 查找今天启用的任务
            ScheduleTask? todayTask = FindTodayTask(todayFlag);

            if (todayTask.HasValue)
            {
                // 有今日任务，显示最近的一个
                DisplayTask(todayTask.Value);
                SetIconScheduled(true);
            }
            else
            {
                // 没有今日任务
                DisplayNoSchedule();
                SetIconScheduled(false);
            }
        }

        /// <summary>
        /// 查找今天启用的任务（返回最近的一个未结束任务）
        /// </summary>
        private ScheduleTask? FindTodayTask(byte todayFlag)
        {
            if (tasks == null || tasks.Length == 0)
                return null;

            ScheduleTask? nearestTask = null;
            int nearestTimeDiff = int.MaxValue;
            int currentTime = DateTime.Now.Hour * 60 + DateTime.Now.Minute;

            foreach (var task in tasks)
            {
                // 检查任务是否启用
                if (!task.Enabled)
                    continue;

                // 检查是否是今天的任务：
                // 1. Repeat == 0 表示仅一次，认为是当天的任务
                // 2. Repeat & todayFlag != 0 表示今天有重复
                bool isTodayTask = task.Repeat == 0 || (task.Repeat & todayFlag) != 0;

                if (!isTodayTask)
                    continue;

                int taskTime = task.StartHour * 60 + task.StartMinute;
                int endTime = task.EndHour * 60 + task.EndMinute;

                // 跳过已结束的任务
                if (currentTime >= endTime)
                    continue;

                int timeDiff = taskTime - currentTime;

                // 找距离当前时间最近的任务（包括进行中的和未来未开始的）
                int absTimeDiff = Math.Abs(timeDiff);
                if (absTimeDiff < nearestTimeDiff)
                {
                    nearestTimeDiff = absTimeDiff;
                    nearestTask = task;
                }
            }

            return nearestTask;
        }

        /// <summary>
        /// 显示任务信息
        /// </summary>
        private void DisplayTask(ScheduleTask task)
        {
            string modeText = GetModeText(task.Mode);
            string timeText = $"{task.StartHour:D2}:{task.StartMinute:D2}";

            // 判断任务是未来还是进行中
            int currentTime = DateTime.Now.Hour * 60 + DateTime.Now.Minute;
            int taskTime = task.StartHour * 60 + task.StartMinute;
            bool isFutureTask = taskTime > currentTime;

            if (scheduleText != null)
            {
                if (isFutureTask)
                {
                    // 即将开始的任务
                    scheduleText.text = $"{modeText}: {timeText}";
                }
                else
                {
                    // 任务进行中，显示时间段
                    scheduleText.text = $"{modeText}: {timeText}~{task.EndHour:D2}:{task.EndMinute:D2}";
                }
            }
        }

        /// <summary>
        /// 显示无定时任务
        /// </summary>
        public void DisplayNoSchedule()
        {
            if (scheduleText != null)
            {
                string noScheduleText = LanguageManager.Instance?.GetLanguage(LANG_NO_SCHEDULE) ?? "No Schedule";
                scheduleText.text = noScheduleText;
            }
        }

        /// <summary>
        /// 设置图标状态
        /// </summary>
        private void SetIconScheduled(bool hasSchedule)
        {
            if (scheduleIcon != null && scheduleIconSprites != null && scheduleIconSprites.Length >= 2)
            {
                scheduleIcon.sprite = hasSchedule ? scheduleIconSprites[1] : scheduleIconSprites[0];
            }
        }

        /// <summary>
        /// 获取任务模式显示文本（支持多语言）
        /// </summary>
        private string GetModeText(ScheduleTaskMode mode)
        {
            string langKey = mode switch
            {
                ScheduleTaskMode.Standby => LANG_STANDBY,
                ScheduleTaskMode.Scan => LANG_SCAN,
                ScheduleTaskMode.Sterilize => LANG_ARMED,
                _ => LANG_STANDBY
            };

            string defaultText = mode switch
            {
                ScheduleTaskMode.Standby => "Standby",
                ScheduleTaskMode.Scan => "Scan",
                ScheduleTaskMode.Sterilize => "Armed",
                _ => "Standby"
            };

            return LanguageManager.Instance?.GetLanguage(langKey) ?? defaultText;
        }

        /// <summary>
        /// 获取星期对应的标志位
        /// </summary>
        private byte GetDayFlag(DayOfWeek dayOfWeek)
        {
            return dayOfWeek switch
            {
                DayOfWeek.Monday => ScheduleTask.REPEAT_MONDAY,
                DayOfWeek.Tuesday => ScheduleTask.REPEAT_TUESDAY,
                DayOfWeek.Wednesday => ScheduleTask.REPEAT_WEDNESDAY,
                DayOfWeek.Thursday => ScheduleTask.REPEAT_THURSDAY,
                DayOfWeek.Friday => ScheduleTask.REPEAT_FRIDAY,
                DayOfWeek.Saturday => ScheduleTask.REPEAT_SATURDAY,
                DayOfWeek.Sunday => ScheduleTask.REPEAT_SUNDAY,
                _ => 0
            };
        }
    }
}