"use client";

import Image from "next/image";
import { DownloadIcon } from "lucide-react";
import type { ReactNode } from "react";

import { GuideExportBranding } from "@/components/public/guide-export-branding";
import {
  ExportLanguageToggle,
  ExportText,
  useExportLanguage,
} from "@/components/public/export-language";
import { GuideImageExport } from "@/components/public/guide-image-export";
import { Button } from "@/components/ui/button";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogHeader,
  DialogTitle,
  DialogTrigger,
} from "@/components/ui/dialog";
import type { PublicGuide } from "@/lib/guides/queries";

type WeaponGroup = PublicGuide["weaponGroups"][number];
type DamageMetric = "overallPercent" | "personalPercent";

function formattedPercent(value: string | null): string {
  if (value === null) return "-%";
  const numeric = Number(value);
  if (numeric === 0) return "-%";
  return `${numeric.toLocaleString("en-US", { maximumFractionDigits: 2 })}%`;
}

function WeaponComparisonImage({
  guide,
  group,
  metric,
  conditionLabel,
}: {
  guide: PublicGuide;
  group: WeaponGroup;
  metric: DamageMetric;
  conditionLabel: ReactNode;
}) {
  const values = group.rows.map((row) => Number(row[metric]) || 0);
  const maximum = Math.max(100, ...values);

  return (
    <div className="relative isolate w-300 overflow-hidden bg-[#070b20] px-14 pt-10 pb-12 font-heading text-white">
      <GuideExportBranding backgroundUrl={guide.character.splashImageUrl ?? guide.coverUrl} />
      <header className="relative z-10 flex flex-col items-center px-48 text-center drop-shadow-[0_4px_3px_rgba(0,0,0,0.9)]">
        <h2 className="max-w-full text-5xl leading-tight font-bold text-balance">
          {`${guide.character.name}’s Weapon Comparison`}
        </h2>
        <p className="mt-1 text-4xl font-bold text-white">
          {metric === "overallPercent" ? (
            <ExportText th="ดาเมจทั้งทีม" en="Overall Damage" />
          ) : (
            <ExportText th="ดาเมจส่วนตัว" en="Personal Damage" />
          )}
        </p>
        <p className="mt-2 text-2xl font-semibold">{conditionLabel}</p>
      </header>

      <div className="relative z-10 mt-9 flex flex-col gap-3">
        {group.rows.map((row) => {
          const numeric = Number(row[metric]) || 0;
          const width = row[metric] === null
            ? 28
            : numeric <= 100
              ? Math.max(28, Math.max(0, numeric) * 0.5)
              : Math.min(90, 50 + ((numeric - 100) / Math.max(1, maximum - 100)) * 40);
          return (
            <div key={row.id} className="grid min-h-22 grid-cols-[76px_1fr] items-center gap-3">
              <div className="relative size-18">
                <Image
                  src={row.weapon.imageUrl}
                  alt=""
                  fill
                  loading="eager"
                  sizes="72px"
                  className="object-contain drop-shadow-[0_4px_3px_rgba(0,0,0,0.8)]"
                />
              </div>
              <div className="flex min-w-0 items-center">
                <div
                  className="flex min-h-16 shrink-0 items-center rounded-r-xl bg-white px-5 text-[#15121a]"
                  style={{ width: `${width}%` }}
                >
                  <span className="truncate text-[28px] font-bold">
                    {row.weapon.name} R{row.refinement}
                  </span>
                </div>
                <div className="ml-3 flex min-w-0 flex-1 flex-col items-start gap-1 text-white drop-shadow-[0_4px_3px_rgba(0,0,0,0.9)]">
                  <strong className="shrink-0 text-[30px]">{formattedPercent(row[metric])}</strong>
                  {row.note ? <span data-export-note className="min-w-0 text-xl leading-tight">{row.note}</span> : null}
                </div>
              </div>
            </div>
          );
        })}
      </div>

      {group.note ? (
        <p data-export-note className="relative z-10 mt-8 whitespace-pre-wrap text-center text-2xl font-semibold drop-shadow-[0_4px_3px_rgba(0,0,0,0.9)]">
          {group.note}
        </p>
      ) : null}
    </div>
  );
}

export function WeaponImageExport({
  guide,
  group,
  conditionIndex,
}: {
  guide: PublicGuide;
  group: WeaponGroup;
  conditionIndex: number;
}) {
  const [language, setLanguage] = useExportLanguage();
  const conditionLabel = group.name || `Condition ${conditionIndex + 1}`;
  const baseName = `${guide.name}-Weapon-${conditionLabel}`;
  const metricOptions = ([
    ["overallPercent", "Overall Damage"],
    ["personalPercent", "Personal Damage"],
  ] as const).filter(([metric]) =>
    group.rows.some((row) => row[metric] !== null),
  );

  return (
    <Dialog>
      <DialogTrigger render={<Button type="button" variant="outline" size="sm" />}>
        <DownloadIcon data-icon="inline-start" />
        ส่งออกภาพ
      </DialogTrigger>
      <DialogContent>
        <DialogHeader>
          <DialogTitle>เลือกประเภทดาเมจ</DialogTitle>
          <DialogDescription>
            เลือกค่าที่ต้องการใช้สร้างภาพเปรียบเทียบอาวุธ
          </DialogDescription>
        </DialogHeader>
        <ExportLanguageToggle language={language} onChange={setLanguage} />
        <div className="grid gap-2 sm:grid-cols-2">
          {metricOptions.map(([metric, label]) => (
            <GuideImageExport
              key={metric}
              fileName={`${baseName}-${label}.png`}
              width={1200}
              captureClassName="p-0"
              language={language}
              showLanguageSelector={false}
              buttonLabel={metric === "overallPercent" ? "ดาเมจทั้งทีม" : "ดาเมจส่วนตัว"}
            >
              <WeaponComparisonImage
                guide={guide}
                group={group}
                metric={metric}
                conditionLabel={group.name ? conditionLabel : (
                  <ExportText
                    th={`เงื่อนไข ${conditionIndex + 1}`}
                    en={`Condition ${conditionIndex + 1}`}
                  />
                )}
              />
            </GuideImageExport>
          ))}
        </div>
      </DialogContent>
    </Dialog>
  );
}