// Custom tooltip demo

import {
  ContributionGraph,
  ContributionGraphGrid,
  ContributionGraphTooltip,
  ContributionGraphLegend,
  type ContributionData,
} from "@/components/ui/contribution-graph";

function generateSampleData(): ContributionData[] {
  const data: ContributionData[] = [];
  const endDate = new Date();
  const startDate = new Date();
  startDate.setFullYear(startDate.getFullYear() - 1);

  const current = new Date(startDate);
  while (current <= endDate) {
    const dayOfWeek = current.getDay();
    const isWeekend = dayOfWeek === 0 || dayOfWeek === 6;
    const baseChance = isWeekend ? 0.3 : 0.6;

    if (Math.random() < baseChance) {
      data.push({
        date: current.toISOString().split("T")[0],
        count: Math.floor(Math.random() * 12) + 1,
      });
    }
    current.setDate(current.getDate() + 1);
  }
  return data;
}

const sampleData = generateSampleData();
const endDate = new Date();
const startDate = new Date();
startDate.setFullYear(startDate.getFullYear() - 1);
startDate.setDate(startDate.getDate() + 1);

// Calculate stats for tooltip
const totalContributions = sampleData.reduce((sum, d) => sum + d.count, 0);
const avgPerDay = (totalContributions / 365).toFixed(1);

function getActivityLevel(count: number): { label: string; color: string } {
  if (count === 0) return { label: "No activity", color: "text-muted-foreground" };
  if (count <= 2) return { label: "Light", color: "text-blue-500" };
  if (count <= 5) return { label: "Moderate", color: "text-green-500" };
  if (count <= 8) return { label: "Active", color: "text-orange-500" };
  return { label: "Very Active", color: "text-red-500" };
}

function getRelativeDate(dateStr: string): string {
  const date = new Date(dateStr);
  const now = new Date();
  const diffDays = Math.floor((now.getTime() - date.getTime()) / (1000 * 60 * 60 * 24));

  if (diffDays === 0) return "Today";
  if (diffDays === 1) return "Yesterday";
  if (diffDays < 7) return `${diffDays} days ago`;
  if (diffDays < 30) return `${Math.floor(diffDays / 7)} weeks ago`;
  if (diffDays < 365) return `${Math.floor(diffDays / 30)} months ago`;
  return `${Math.floor(diffDays / 365)} years ago`;
}

export default function DemoCustomTooltip() {
  return (
    <div className="w-full max-w-4xl p-6">
      <ContributionGraph
        data={sampleData}
        startDate={startDate.toISOString().split("T")[0]}
        endDate={endDate.toISOString().split("T")[0]}
      >
        <ContributionGraphGrid />
        <ContributionGraphTooltip className="min-w-[180px] p-0 overflow-hidden">
          {({ date, count }) => {
            const activity = getActivityLevel(count);
            const dayOfWeek = new Date(date).toLocaleDateString("en-US", { weekday: "long" });

            return (
              <div className="divide-y divide-border">
                {/* Header */}
                <div className="px-3 py-2 bg-muted/50">
                  <div className="flex items-center justify-between gap-3">
                    <span className="text-[10px] uppercase tracking-wider text-muted-foreground">
                      {dayOfWeek}
                    </span>
                    <span className={`text-[10px] font-medium ${activity.color}`}>
                      {activity.label}
                    </span>
                  </div>
                  <div className="text-xs text-muted-foreground mt-0.5">
                    {getRelativeDate(date)}
                  </div>
                </div>

                {/* Stats */}
                <div className="px-3 py-2 space-y-1.5">
                  <div className="flex items-baseline justify-between">
                    <span className="text-2xl font-bold text-popover-foreground tabular-nums">
                      {count}
                    </span>
                    <span className="text-[10px] text-muted-foreground">
                      contribution{count !== 1 ? "s" : ""}
                    </span>
                  </div>

                  {/* Progress bar */}
                  <div className="space-y-1">
                    <div className="h-1.5 w-full bg-muted rounded-full overflow-hidden">
                      <div
                        className="h-full bg-primary transition-all duration-300"
                        style={{ width: `${Math.min(100, (count / 12) * 100)}%` }}
                      />
                    </div>
                    <div className="flex justify-between text-[9px] text-muted-foreground">
                      <span>0</span>
                      <span>Daily avg: {avgPerDay}</span>
                      <span>12+</span>
                    </div>
                  </div>
                </div>

                {/* Footer */}
                <div className="px-3 py-1.5 bg-muted/30">
                  <div className="text-[10px] text-muted-foreground">
                    {new Date(date).toLocaleDateString("en-US", {
                      month: "long",
                      day: "numeric",
                      year: "numeric",
                    })}
                  </div>
                </div>
              </div>
            );
          }}
        </ContributionGraphTooltip>
        <ContributionGraphLegend className="mt-3" />
      </ContributionGraph>
    </div>
  );
}