"use client";

import * as React from "react";
import Link from "next/link";
import { useRouter } from "next/navigation";
import { Card, HideAmountsToggle, Icon, IconChip, MercuryButton, ThemeToggle } from "@/ds";
import type { IconName } from "@/ds";
import { useMe, useSettings } from "@/api/hooks/reads";
import { profileStrings } from "./strings";
import { SettingsForm } from "./SettingsForm";
import { ConnectedBanks } from "./ConnectedBanks";

/** The Миний (profile) tab hub: account summary, hide-amounts toggle,
 * entries into Categories/Subscriptions (their own routes) and Settings
 * (rendered inline, no dedicated route), the read-only connected-banks list,
 * and logout. Ports `ProfileView.swift`'s layout minus bank connect/disconnect
 * (mobile-only per the Task 13 brief) and the not-yet-wired static rows
 * (Шинэ мэдээ / Түгээмэл асуултууд / Санал хүсэлт / Үйлчилгээний нөхцөл). */
export function ProfileView() {
  const router = useRouter();
  const { data: me } = useMe();
  const { data: settings } = useSettings();
  const [showSettings, setShowSettings] = React.useState(false);
  const [loggingOut, setLoggingOut] = React.useState(false);

  const emailLocal = me?.email ? me.email.split("@")[0] : "";
  const displayName = settings?.holderName || emailLocal || me?.email || "";
  const initial = (displayName || me?.email || "?").trim().charAt(0).toUpperCase() || "?";

  async function handleLogout() {
    setLoggingOut(true);
    try {
      await fetch("/api/auth/logout", { method: "POST", credentials: "same-origin" });
    } finally {
      router.push("/login");
    }
  }

  if (showSettings) {
    return <SettingsForm onBack={() => setShowSettings(false)} />;
  }

  return (
    <div style={{ display: "flex", flexDirection: "column", gap: 16 }}>
      <div style={{ display: "flex", alignItems: "center", justifyContent: "space-between" }}>
        <h1 style={{ fontSize: 18, fontWeight: 600, margin: 0 }}>{profileStrings.header.title}</h1>
        <HideAmountsToggle label={profileStrings.display.hideAmounts} />
      </div>

      <Card style={{ display: "flex", alignItems: "center", gap: 14 }}>
        <span
          aria-hidden
          style={{
            width: 56,
            height: 56,
            flexShrink: 0,
            borderRadius: 28,
            display: "grid",
            placeItems: "center",
            fontSize: 22,
            fontWeight: 800,
            color: "var(--mercury-on-brand)",
            background: "var(--mercury-brand-yellow)",
          }}
        >
          {initial}
        </span>
        <div style={{ display: "flex", flexDirection: "column", gap: 2, minWidth: 0 }}>
          <span
            style={{
              fontSize: 16,
              fontWeight: 700,
              overflow: "hidden",
              textOverflow: "ellipsis",
              whiteSpace: "nowrap",
            }}
          >
            {displayName}
          </span>
          {me?.email && (
            <span
              style={{
                fontSize: 13,
                color: "var(--seed-color-fg-muted, #6b7280)",
                overflow: "hidden",
                textOverflow: "ellipsis",
                whiteSpace: "nowrap",
              }}
            >
              {me.email}
            </span>
          )}
        </div>
      </Card>

      <Card style={{ display: "flex", flexDirection: "column" }}>
        <nav style={{ display: "flex", flexDirection: "column" }}>
          <MenuRow icon="wrench" label={profileStrings.menu.settings} onClick={() => setShowSettings(true)} />
          <MenuLink icon="list" label={profileStrings.menu.categories} href="/profile/categories" />
          <MenuLink icon="sparkles" label={profileStrings.menu.subscriptions} href="/profile/subscriptions" />
        </nav>
      </Card>

      <Card style={{ display: "flex", flexDirection: "column", gap: 10 }}>
        <span style={{ fontSize: 13, fontWeight: 600, color: "var(--seed-color-fg-muted, #6b7280)" }}>
          {profileStrings.display.themeMode}
        </span>
        <ThemeToggle
          labels={{
            system: profileStrings.display.themeSystem,
            light: profileStrings.display.themeLight,
            dark: profileStrings.display.themeDark,
          }}
        />
      </Card>

      <Card>
        <ConnectedBanks />
      </Card>

      <MercuryButton variant="secondary" onClick={handleLogout} loading={loggingOut}>
        {profileStrings.logout}
      </MercuryButton>
    </div>
  );
}

const menuRowStyle: React.CSSProperties = {
  display: "flex",
  alignItems: "center",
  justifyContent: "space-between",
  gap: 12,
  width: "100%",
  padding: "10px 0",
  background: "none",
  border: "none",
  cursor: "pointer",
  font: "inherit",
  color: "inherit",
  textAlign: "left",
  textDecoration: "none",
};

function MenuRowContent({ icon, label }: { icon: IconName; label: string }) {
  return (
    <>
      <div style={{ display: "flex", alignItems: "center", gap: 12, minWidth: 0 }}>
        <IconChip icon={icon} tint="var(--seed-color-bg-neutral-subtle, #eef0f2)" fg="var(--seed-color-fg-neutral)" />
        <span style={{ fontSize: 15, fontWeight: 600 }}>{label}</span>
      </div>
      <Icon name="chevron-right" size={18} style={{ color: "var(--seed-color-fg-placeholder, #9ca3af)" }} />
    </>
  );
}

function MenuRow({ icon, label, onClick }: { icon: IconName; label: string; onClick: () => void }) {
  return (
    <button type="button" onClick={onClick} style={menuRowStyle}>
      <MenuRowContent icon={icon} label={label} />
    </button>
  );
}

function MenuLink({ icon, label, href }: { icon: IconName; label: string; href: string }) {
  return (
    <Link href={href} style={menuRowStyle}>
      <MenuRowContent icon={icon} label={label} />
    </Link>
  );
}