// components/account/PasswordChange.tsx
"use client";

import { useEffect, useState } from "react";

type Me = {
    id: string;
    username?: string | null;
    email?: string | null;
};

export default function PasswordChange() {
    const [current, setCurrent] = useState("");
    const [next, setNext] = useState("");
    const [next2, setNext2] = useState("");
    const [identifier, setIdentifier] = useState(""); // email OR username (sent to API)
    const [needIdentifier, setNeedIdentifier] = useState(false);
    const [busy, setBusy] = useState(false);
    const [msg, setMsg] = useState<string | null>(null);

    // Try to auto-fill identifier from /api/account
    useEffect(() => {
        (async () => {
            try {
                const r = await fetch("/api/account", { credentials: "include", cache: "no-store" });
                const j = await r.json().catch(() => ({}));
                const me: Me | undefined = j?.user ?? j?.data ?? undefined;
                const id = (me?.email || me?.username || "").trim();
                if (id) {
                    setIdentifier(id);
                    setNeedIdentifier(false);
                } else {
                    setNeedIdentifier(true);
                }
            } catch {
                // If it fails, we'll let the user type it
                setNeedIdentifier(true);
            }
        })();
    }, []);

    const onSave = async () => {
        setMsg(null);
        if (next !== next2) {
            setMsg("New passwords do not match.");
            return;
        }
        if (next.length < 8) {
            setMsg("Password must be at least 8 characters.");
            return;
        }
        if (!identifier.trim()) {
            setNeedIdentifier(true);
            setMsg("Please enter your email or username.");
            return;
        }

        setBusy(true);
        try {
            const r = await fetch("/api/account/password", {
                method: "POST",
                headers: { "Content-Type": "application/json" },
                body: JSON.stringify({ current, next, identifier: identifier.trim() }),
            });

            const j = await r.json().catch(() => ({} as any));
            if (!r.ok) {
                setMsg(j?.error ? (j?.debug ? `${j.error} (${j.debug})` : j.error) : "Password change failed");
                return;
            }

            setMsg("Password updated.");
            setCurrent("");
            setNext("");
            setNext2("");
        } catch (e: any) {
            setMsg(e?.message || "Password change failed");
        } finally {
            setBusy(false);
        }
    };

    return (
        <div id="security" className="rounded-md border p-4 space-y-3">
        <h3 className="font-semibold">Change Password</h3>

        <div className="grid sm:grid-cols-2 gap-3 text-sm">
        {needIdentifier && (
            <label className="grid gap-1 sm:col-span-2">
            <span className="opacity-60">Email or Username</span>
            <input
            className="rounded-md border px-2 py-1"
            type="text"
            value={identifier}
            onChange={(e) => setIdentifier(e.target.value)}
            placeholder="you@example.com or your-handle"
            autoComplete="username"
            />
            </label>
        )}

        <label className="grid gap-1 sm:col-span-2">
        <span className="opacity-60">Current Password</span>
        <input
        className="rounded-md border px-2 py-1"
        type="password"
        value={current}
        onChange={(e) => setCurrent(e.target.value)}
        autoComplete="current-password"
        />
        </label>

        <label className="grid gap-1">
        <span className="opacity-60">New Password</span>
        <input
        className="rounded-md border px-2 py-1"
        type="password"
        value={next}
        onChange={(e) => setNext(e.target.value)}
        autoComplete="new-password"
        />
        </label>

        <label className="grid gap-1">
        <span className="opacity-60">Confirm New Password</span>
        <input
        className="rounded-md border px-2 py-1"
        type="password"
        value={next2}
        onChange={(e) => setNext2(e.target.value)}
        autoComplete="new-password"
        />
        </label>
        </div>

        <div className="flex items-center gap-3">
        <button
        onClick={onSave}
        disabled={busy}
        className="rounded-md bg-black text-white px-3 py-2 text-sm disabled:opacity-60"
        >
        {busy ? "Saving…" : "Update Password"}
        </button>
        {msg && <div className="text-sm opacity-80">{msg}</div>}
        </div>
        </div>
    );
}