"use client";

import { useState } from "react";
import Image from "next/image";
import { useApp } from "@/contexts/AppContext";

interface CalendarDayProps {
  day: number | null;
  value: string;
  type: "positive" | "negative" | "neutral" | "current";
}

function CalendarDay({ day, value, type }: CalendarDayProps) {
  // Empty cell
  if (day === null) {
    return <div className="flex-1" />;
  }

  const typeStyles = {
    positive: "bg-[#f2fcf7] dark:bg-green-900/20 border-[#cef3e0] dark:border-green-700/30",
    negative: "bg-[#fff8f7] dark:bg-red-900/20 border-[#ffdbd5] dark:border-red-700/30",
    neutral: "bg-[#f9fafb] dark:bg-gray-700 border-[#f3f4f6] dark:border-gray-600",
    current: "bg-[#111827] dark:bg-blue-600 border-[#111827] dark:border-blue-600",
  };

  const isCurrent = type === "current";
  const dayTextStyle = isCurrent
    ? "text-[#fcfcfd]"
    : "text-[#9ca1af] dark:text-gray-400";
  const valueTextStyle = isCurrent
    ? "text-[#fcfcfd]"
    : "text-[#111827] dark:text-white";

  return (
    <div
      className={`rounded border flex flex-col items-center justify-center flex-1 p-3 gap-6 ${typeStyles[type]}`}
    >
      <div className="w-full flex items-start">
        <span className={`text-[10px] font-bold leading-[150%] ${dayTextStyle}`}>
          {day}
        </span>
      </div>
      <div className="w-full flex items-end justify-end">
        <span className={`text-body-small font-bold leading-[150%] ${valueTextStyle}`}>
          {value}
        </span>
      </div>
    </div>
  );
}

interface StatCardProps {
  label: string;
  value: string;
}

function StatCard({ label, value }: StatCardProps) {
  return (
    <div className="flex flex-col items-center gap-1">
      <span className="text-[10px] font-bold leading-[150%] tracking-[0.01em] text-[#9ca1af] dark:text-gray-400">
        {label}
      </span>
      <span className="text-body-large font-bold text-[#10b981] dark:text-green-400">
        {value}
      </span>
    </div>
  );
}

export default function PerformanceAnalysis() {
  const { t } = useApp();
  const [currentMonth] = useState("November 2025");

  // 模拟日历数据 - 5周数据
  const weekData = [
    [
      { day: 31, value: "0.00%", type: "neutral" as const },
      { day: 1, value: "+0.12%", type: "positive" as const },
      { day: 2, value: "+0.08%", type: "positive" as const },
      { day: 3, value: "-0.03%", type: "negative" as const },
      { day: 4, value: "+0.15%", type: "positive" as const },
      { day: 5, value: "+0.21%", type: "positive" as const },
      { day: 6, value: "0.00%", type: "neutral" as const },
    ],
    [
      { day: 7, value: "+0.12%", type: "positive" as const },
      { day: 8, value: "+0.12%", type: "positive" as const },
      { day: 9, value: "-0.03%", type: "negative" as const },
      { day: 10, value: "+0.08%", type: "positive" as const },
      { day: 11, value: "-0.03%", type: "negative" as const },
      { day: 12, value: "+0.21%", type: "positive" as const },
      { day: 13, value: "0.00%", type: "neutral" as const },
    ],
    [
      { day: 14, value: "-0.03%", type: "negative" as const },
      { day: 15, value: "-0.03%", type: "negative" as const },
      { day: 16, value: "+0.15%", type: "positive" as const },
      { day: 17, value: "+0.21%", type: "positive" as const },
      { day: 18, value: "+0.08%", type: "positive" as const },
      { day: 19, value: "0.00%", type: "neutral" as const },
      { day: 20, value: "+0.12%", type: "positive" as const },
    ],
    [
      { day: 21, value: "+0.08%", type: "positive" as const },
      { day: 22, value: "+0.15%", type: "positive" as const },
      { day: 23, value: "-0.03%", type: "negative" as const },
      { day: 24, value: "+0.12%", type: "current" as const },
      { day: 25, value: "0.00%", type: "neutral" as const },
      { day: 26, value: "+0.21%", type: "positive" as const },
      { day: 27, value: "+0.08%", type: "positive" as const },
    ],
    [
      { day: 28, value: "+0.12%", type: "positive" as const },
      { day: 30, value: "-0.03%", type: "negative" as const },
      { day: 29, value: "-0.03%", type: "negative" as const },
      { day: null, value: "", type: "neutral" as const },
      { day: null, value: "", type: "neutral" as const },
      { day: null, value: "", type: "neutral" as const },
      { day: null, value: "", type: "neutral" as const },
    ],
  ];

  return (
    <div className="bg-bg-surface dark:bg-gray-800 rounded-3xl border border-border-gray dark:border-gray-700 p-8 flex flex-col gap-8">
      {/* Top Section - Title and Stats */}
      <div className="flex items-start justify-between pb-8 border-b border-border-gray dark:border-gray-700">
        <div className="flex flex-col gap-2">
          <h2 className="text-body-large font-bold text-text-primary dark:text-white">
            {t("performance.title")}
          </h2>
          <p className="text-body-small font-regular text-[#9ca1af] dark:text-gray-400">
            {t("performance.description")}
          </p>
        </div>
        <div className="flex items-center gap-8">
          <StatCard label={t("performance.ytd")} value="+8.7%" />
          <StatCard label={t("performance.ytd")} value="+8.7%" />
        </div>
      </div>

      {/* Calendar Section */}
      <div className="flex flex-col gap-6">
        {/* Calendar Header */}
        <div className="flex items-center justify-between">
          <div className="flex items-center gap-2">
            <div className="w-6 h-6">
              <Image src="/component-114.svg" alt="" width={24} height={24} />
            </div>
            <h3 className="text-body-small font-bold text-text-primary dark:text-white">
              {t("performance.dailyNetReturns")}
            </h3>
          </div>
          <div className="flex items-center gap-2">
            <button className="w-6 h-6 rounded-lg flex items-center justify-center hover:bg-gray-100 dark:hover:bg-gray-700 transition-colors">
              <Image src="/icon9.svg" alt="Previous" width={16} height={16} />
            </button>
            <span className="text-body-small font-bold text-[#0a0a0a] dark:text-white tracking-tight">
              {currentMonth}
            </span>
            <button className="w-6 h-6 rounded-lg flex items-center justify-center hover:bg-gray-100 dark:hover:bg-gray-700 transition-colors">
              <Image src="/icon10.svg" alt="Next" width={16} height={16} />
            </button>
          </div>
        </div>

        {/* Calendar */}
        <div className="flex flex-col gap-4">
          {/* Weekday Headers */}
          <div className="grid grid-cols-7 gap-2">
            {["sun", "mon", "tue", "wed", "thu", "fri", "sat"].map((day) => (
              <div key={day} className="flex items-center justify-center">
                <span className="text-[10px] font-bold leading-[150%] text-[#94a3b8] dark:text-gray-400">
                  {t(`performance.weekdays.${day}`)}
                </span>
              </div>
            ))}
          </div>

          {/* Calendar Grid */}
          <div className="flex flex-col gap-1">
            {weekData.map((week, weekIndex) => (
              <div key={weekIndex} className="grid grid-cols-7 gap-2">
                {week.map((day, dayIndex) => (
                  <CalendarDay
                    key={`${weekIndex}-${dayIndex}`}
                    day={day.day}
                    value={day.value}
                    type={day.type}
                  />
                ))}
              </div>
            ))}
          </div>
        </div>
      </div>
    </div>
  );
}