import { useMemo, useState } from "react";
import { Plus, Trash2, Camera, X } from "lucide-react";
import type { ContactCard, JSContactAddress, JSContactEmail, JSContactPhone } from "@/jmap/types";
import { useContacts } from "@/store/contacts";
import { buildName, contactDisplayName, nameParts, newKey, withPhoto } from "@/lib/contacts";
import { Dialog } from "@/ui/dialog";
import { DateField } from "@/ui/datefield";
import { toast } from "@/ui/toast";
import { client } from "@/jmap/client";
import { t } from "@/lib/i18n";

interface Props {
  card: Partial<ContactCard>;
  defaultBookId: string | null;
  onClose: () => void;
  onSaved: (id: string) => void;
}

const EMAIL_CTX = ["private", "work", "other"];
const PHONE_CTX = ["mobile", "private", "work", "fax", "other"];
const ADDR_CTX = ["private", "work", "other"];

type EmailRow = { key: string; address: string; ctx: string };
type PhoneRow = { key: string; number: string; ctx: string };
type AddrRow = { key: string; ctx: string; street: string; city: string; region: string; postcode: string; country: string };

export function ContactEditor({ card, defaultBookId, onClose, onSaved }: Props) {
  const contacts = useContacts();
  const isNew = !card.id;
  // Read from the card whether it is saved or seeded (e.g. from a message header).
  const np = nameParts(card as ContactCard);
  const [kind, setKind] = useState<"individual" | "group" | "org">((card.kind as "individual" | "group" | "org") ?? "individual");
  const [given, setGiven] = useState(np.given);
  const [surname, setSurname] = useState(np.surname);
  const [prefix, setPrefix] = useState(np.prefix);
  const [middle, setMiddle] = useState(np.middle);
  const [suffix, setSuffix] = useState(np.suffix);
  const [nickname, setNickname] = useState(Object.values(card.nicknames ?? {})[0]?.name ?? "");
  const [company, setCompany] = useState(Object.values(card.organizations ?? {})[0]?.name ?? "");
  const [jobTitle, setJobTitle] = useState(Object.values(card.titles ?? {})[0]?.name ?? "");
  const [emails, setEmails] = useState<EmailRow[]>(() => Object.entries(card.emails ?? {}).map(([key, e]) => ({ key, address: e.address, ctx: Object.keys(e.contexts ?? {})[0] ?? "other" })));
  const [phones, setPhones] = useState<PhoneRow[]>(() => Object.entries(card.phones ?? {}).map(([key, p]) => ({ key, number: p.number, ctx: Object.keys(p.features ?? {})[0] ?? Object.keys(p.contexts ?? {})[0] ?? "other" })));
  const [addrs, setAddrs] = useState<AddrRow[]>(() => Object.entries(card.addresses ?? {}).map(([key, a]) => {
    const get = (k: string) => (a.components ?? []).filter((c) => c.kind === k).map((c) => c.value).join(" ");
    return { key, ctx: Object.keys(a.contexts ?? {})[0] ?? "other", street: [get("number"), get("name"), get("apartment")].filter(Boolean).join(" ") || (a.full ?? ""), city: get("locality"), region: get("region"), postcode: get("postcode"), country: get("country") };
  }));
  const [birthday, setBirthday] = useState(() => {
    const b = Object.values(card.anniversaries ?? {}).find((a) => a.kind === "birth")?.date;
    return b?.year && b.month && b.day ? `${b.year}-${String(b.month).padStart(2, "0")}-${String(b.day).padStart(2, "0")}` : "";
  });
  const [website, setWebsite] = useState(Object.values(card.links ?? {})[0]?.uri ?? "");
  const [note, setNote] = useState(Object.values(card.notes ?? {})[0]?.note ?? "");
  const [bookId, setBookId] = useState(Object.keys(card.addressBookIds ?? {})[0] ?? defaultBookId ?? "");
  const [photo, setPhoto] = useState<{ dataUrl: string; type: string } | null>(null);
  const [removePhoto, setRemovePhoto] = useState(false);
  const [memberUids, setMemberUids] = useState<string[]>(Object.keys(card.members ?? {}));
  const [memberQuery, setMemberQuery] = useState("");
  const [busy, setBusy] = useState(false);
  const books = Object.values(contacts.books);
  const existingPhoto = card.id && contacts.accountId ? Object.values(card.media ?? {}).find((m) => m.kind === "photo") : undefined;

  const memberCandidates = useMemo(() => {
    if (!memberQuery.trim()) return [];
    return contacts.search(memberQuery).filter((c) => c.kind !== "group" && !memberUids.includes(c.uid)).slice(0, 6);
  }, [memberQuery, contacts, memberUids]);

  const save = async () => {
    if (!bookId) {
      toast.error(t("Choose an address book"));
      return;
    }
    setBusy(true);
    try {
      const obj: Record<string, unknown> = {};
      obj.kind = kind;
      const name = buildName({ given, surname, middle, prefix, suffix });
      if (kind === "individual") obj.name = name ?? null;
      else {
        obj.name = company ? { "@type": "Name", full: company } : (name ?? null);
      }
      obj.nicknames = nickname ? { [newKey("n")]: { "@type": "Nickname", name: nickname } } : null;
      obj.organizations = company ? { [newKey("o")]: { "@type": "Organization", name: company } } : null;
      obj.titles = jobTitle ? { [newKey("t")]: { "@type": "Title", name: jobTitle, kind: "title" } } : null;
      const em: Record<string, JSContactEmail> = {};
      emails.filter((e) => e.address.trim()).forEach((e, i) => { em[e.key] = { "@type": "EmailAddress", address: e.address.trim(), contexts: e.ctx !== "other" ? { [e.ctx]: true } : undefined, pref: i === 0 ? 1 : undefined }; });
      obj.emails = Object.keys(em).length ? em : null;
      const ph: Record<string, JSContactPhone> = {};
      phones.filter((p) => p.number.trim()).forEach((p) => { ph[p.key] = { "@type": "Phone", number: p.number.trim(), ...(["mobile", "fax"].includes(p.ctx) ? { features: { [p.ctx === "mobile" ? "mobile" : "fax"]: true } } : p.ctx !== "other" ? { contexts: { [p.ctx]: true } } : {}) }; });
      obj.phones = Object.keys(ph).length ? ph : null;
      const ad: Record<string, JSContactAddress> = {};
      addrs.filter((a) => a.street || a.city || a.country || a.postcode).forEach((a) => {
        const components: JSContactAddress["components"] = [];
        if (a.street) components.push({ "@type": "AddressComponent", kind: "name", value: a.street });
        if (a.city) components.push({ "@type": "AddressComponent", kind: "locality", value: a.city });
        if (a.region) components.push({ "@type": "AddressComponent", kind: "region", value: a.region });
        if (a.postcode) components.push({ "@type": "AddressComponent", kind: "postcode", value: a.postcode });
        if (a.country) components.push({ "@type": "AddressComponent", kind: "country", value: a.country });
        ad[a.key] = { "@type": "Address", components, contexts: a.ctx !== "other" ? { [a.ctx]: true } : undefined };
      });
      obj.addresses = Object.keys(ad).length ? ad : null;
      if (birthday) {
        const [y, m, d] = birthday.split("-").map(Number) as [number, number, number];
        obj.anniversaries = { [newKey("a")]: { "@type": "Anniversary", kind: "birth", date: { "@type": "PartialDate", year: y, month: m, day: d } } };
      } else obj.anniversaries = null;
      obj.links = website ? { [newKey("l")]: { "@type": "Link", uri: /^https?:/i.test(website) ? website : `https://${website}` } } : null;
      obj.notes = note.trim() ? { [newKey("x")]: { "@type": "Note", note: note.trim() } } : null;
      obj.members = kind === "group" && memberUids.length ? Object.fromEntries(memberUids.map((u) => [u, true])) : null;
      // Inline, not uploaded: see `withPhoto`. The card's other media stays.
      if (photo) obj.media = withPhoto(card.media, photo);
      else if (removePhoto) obj.media = withPhoto(card.media, null);
      if (isNew) {
        const id = await contacts.createCard(obj as Partial<ContactCard>, bookId);
        toast.success(t("Contact created"));
        onSaved(id);
      } else {
        const patch: Record<string, unknown> = { ...obj };
        const curBook = Object.keys(card.addressBookIds ?? {})[0];
        if (curBook !== bookId) patch.addressBookIds = { [bookId]: true };
        if (!photo && !removePhoto) delete patch.media;
        await contacts.updateCard(card.id!, patch);
        toast.success(t("Contact saved"));
        onSaved(card.id!);
      }
    } catch (err) {
      toast.error((err as Error).message);
    } finally {
      setBusy(false);
    }
  };

  const onPhoto = (f: File) => {
    const img = new Image();
    const url = URL.createObjectURL(f);
    img.onload = () => {
      const size = 256;
      const c = document.createElement("canvas");
      c.width = size;
      c.height = size;
      const ctx = c.getContext("2d")!;
      const s = Math.min(img.width, img.height);
      ctx.drawImage(img, (img.width - s) / 2, (img.height - s) / 2, s, s, 0, 0, size, size);
      setPhoto({ dataUrl: c.toDataURL("image/jpeg", 0.85), type: "image/jpeg" });
      setRemovePhoto(false);
      URL.revokeObjectURL(url);
    };
    img.src = url;
  };

  const photoSrc = photo?.dataUrl ?? (!removePhoto && existingPhoto ? (existingPhoto.uri?.startsWith("data:") ? existingPhoto.uri : existingPhoto.blobId ? client.downloadUrl(contacts.accountId!, existingPhoto.blobId, "photo", existingPhoto.mediaType ?? "image/jpeg", true) : null) : null);

  return (
    <Dialog open onClose={onClose} title={isNew ? t("New contact") : t("Edit {name}", { name: contactDisplayName(card as ContactCard) })} size="lg" footer={<><button className="btn" onClick={onClose}>{t("Cancel")}</button><button className="btn btn-primary" disabled={busy} onClick={() => void save()}>{busy ? t("Saving…") : t("Save")}</button></>}>
      <div className="contact-form">
        <div className="row" style={{ gap: 16, marginBottom: 12 }}>
          <label className="avatar xl" style={{ background: "var(--bg-sunken)", color: "var(--fg-muted)", cursor: "pointer", position: "relative" }} title={t("Change photo")}>
            {photoSrc ? <img src={photoSrc} alt="" /> : <Camera size={28} />}
            <input type="file" accept="image/*" hidden onChange={(e) => { const f = e.target.files?.[0]; if (f) onPhoto(f); e.target.value = ""; }} />
          </label>
          {photoSrc && <button className="btn btn-ghost btn-sm" onClick={() => { setPhoto(null); setRemovePhoto(true); }}><X size={14} />  {t("Remove photo")}</button>}
          <span className="spacer" />
          <div className="field" style={{ marginBottom: 0, width: 160 }}>
            <label>{t("Type")}</label>
            <select className="select" value={kind} onChange={(e) => setKind(e.target.value as typeof kind)}>
              <option value="individual">{t("Person")}</option>
              <option value="org">{t("Organization")}</option>
              <option value="group">{t("Group")}</option>
            </select>
          </div>
          <div className="field" style={{ marginBottom: 0, width: 200 }}>
            <label>{t("Address book")}</label>
            <select className="select" value={bookId} onChange={(e) => setBookId(e.target.value)}>
              {books.map((b) => <option key={b.id} value={b.id}>{b.name}</option>)}
            </select>
          </div>
        </div>
        {kind === "individual" ? (
          <>
            <div className="field-row">
              <div className="field"><label>{t("First name")}</label><input className="input" value={given} onChange={(e) => setGiven(e.target.value)} autoFocus /></div>
              <div className="field"><label>{t("Last name")}</label><input className="input" value={surname} onChange={(e) => setSurname(e.target.value)} /></div>
            </div>
            <details>
              <summary className="hint" style={{ cursor: "pointer", marginBottom: 8 }}>{t("More name fields")}</summary>
              <div className="field-row">
                <div className="field"><label>{t("Prefix")}</label><input className="input" value={prefix} onChange={(e) => setPrefix(e.target.value)} placeholder={t("Dr.")} /></div>
                <div className="field"><label>{t("Middle name")}</label><input className="input" value={middle} onChange={(e) => setMiddle(e.target.value)} /></div>
                <div className="field"><label>{t("Suffix")}</label><input className="input" value={suffix} onChange={(e) => setSuffix(e.target.value)} placeholder={t("Jr.")} /></div>
                <div className="field"><label>{t("Nickname")}</label><input className="input" value={nickname} onChange={(e) => setNickname(e.target.value)} /></div>
              </div>
            </details>
            <div className="field-row">
              <div className="field"><label>{t("Company")}</label><input className="input" value={company} onChange={(e) => setCompany(e.target.value)} /></div>
              <div className="field"><label>{t("Job title")}</label><input className="input" value={jobTitle} onChange={(e) => setJobTitle(e.target.value)} /></div>
            </div>
          </>
        ) : (
          <div className="field"><label>{kind === "group" ? "Group name" : "Organization name"}</label><input className="input" value={company} onChange={(e) => setCompany(e.target.value)} autoFocus /></div>
        )}

        {kind === "group" && (
          <div className="field">
            <label>{t("Members")}</label>
            <div className="row wrap gap-4 mb-8">
              {memberUids.map((uid) => {
                const m = Object.values(contacts.cards).find((x) => x.uid === uid);
                return <span key={uid} className="chip">{m ? contactDisplayName(m) : uid}<button className="chip-x" onClick={() => setMemberUids(memberUids.filter((u) => u !== uid))}><X size={12} /></button></span>;
              })}
            </div>
            <div style={{ position: "relative" }}>
              <input className="input" placeholder={t("Search contacts to add…")} value={memberQuery} onChange={(e) => setMemberQuery(e.target.value)} />
              {memberCandidates.length > 0 && (
                <div className="suggest-list" style={{ width: "100%" }}>
                  {memberCandidates.map((c) => <div key={c.id} className="suggest-item" onMouseDown={(e) => { e.preventDefault(); setMemberUids([...memberUids, c.uid]); setMemberQuery(""); }}><span className="s-name">{contactDisplayName(c)}</span><span className="s-email">{Object.values(c.emails ?? {})[0]?.address}</span></div>)}
                </div>
              )}
            </div>
          </div>
        )}

        <div className="field">
          <label>{t("Email")}</label>
          <div className="multi">
            {emails.map((e, i) => (
              <div key={e.key} className="multi-row">
                <input className="input" type="email" value={e.address} placeholder={t("name@example.com")} onChange={(ev) => setEmails(emails.map((x, j) => (j === i ? { ...x, address: ev.target.value } : x)))} />
                <select className="select" value={e.ctx} onChange={(ev) => setEmails(emails.map((x, j) => (j === i ? { ...x, ctx: ev.target.value } : x)))}>{EMAIL_CTX.map((c) => <option key={c} value={c}>{c}</option>)}</select>
                <button className="icon-btn sm danger" onClick={() => setEmails(emails.filter((_, j) => j !== i))} aria-label={t("Remove")}><Trash2 size={16} /></button>
              </div>
            ))}
            <button className="btn btn-ghost btn-sm" style={{ alignSelf: "flex-start" }} onClick={() => setEmails([...emails, { key: newKey("e"), address: "", ctx: emails.length ? "work" : "private" }])}><Plus size={14} />  {t("Add email")}</button>
          </div>
        </div>
        <div className="field">
          <label>{t("Phone")}</label>
          <div className="multi">
            {phones.map((p, i) => (
              <div key={p.key} className="multi-row">
                <input className="input" type="tel" value={p.number} placeholder="+1 555 0100" onChange={(ev) => setPhones(phones.map((x, j) => (j === i ? { ...x, number: ev.target.value } : x)))} />
                <select className="select" value={p.ctx} onChange={(ev) => setPhones(phones.map((x, j) => (j === i ? { ...x, ctx: ev.target.value } : x)))}>{PHONE_CTX.map((c) => <option key={c} value={c}>{c}</option>)}</select>
                <button className="icon-btn sm danger" onClick={() => setPhones(phones.filter((_, j) => j !== i))} aria-label={t("Remove")}><Trash2 size={16} /></button>
              </div>
            ))}
            <button className="btn btn-ghost btn-sm" style={{ alignSelf: "flex-start" }} onClick={() => setPhones([...phones, { key: newKey("p"), number: "", ctx: "mobile" }])}><Plus size={14} />  {t("Add phone")}</button>
          </div>
        </div>
        <div className="field">
          <label>{t("Address")}</label>
          <div className="multi">
            {addrs.map((a, i) => (
              <div key={a.key} className="card" style={{ marginBottom: 0 }}>
                <div className="row mb-8">
                  <select className="select" style={{ width: 140 }} value={a.ctx} onChange={(ev) => setAddrs(addrs.map((x, j) => (j === i ? { ...x, ctx: ev.target.value } : x)))}>{ADDR_CTX.map((c) => <option key={c} value={c}>{c}</option>)}</select>
                  <span className="spacer" />
                  <button className="icon-btn sm danger" onClick={() => setAddrs(addrs.filter((_, j) => j !== i))} aria-label={t("Remove")}><Trash2 size={16} /></button>
                </div>
                <div className="addr-grid">
                  <input className="input" style={{ gridColumn: "1 / -1" }} placeholder={t("Street")} value={a.street} onChange={(ev) => setAddrs(addrs.map((x, j) => (j === i ? { ...x, street: ev.target.value } : x)))} />
                  <input className="input" placeholder={t("City")} value={a.city} onChange={(ev) => setAddrs(addrs.map((x, j) => (j === i ? { ...x, city: ev.target.value } : x)))} />
                  <input className="input" placeholder={t("State / Region")} value={a.region} onChange={(ev) => setAddrs(addrs.map((x, j) => (j === i ? { ...x, region: ev.target.value } : x)))} />
                  <input className="input" placeholder={t("Postal code")} value={a.postcode} onChange={(ev) => setAddrs(addrs.map((x, j) => (j === i ? { ...x, postcode: ev.target.value } : x)))} />
                  <input className="input" placeholder={t("Country")} value={a.country} onChange={(ev) => setAddrs(addrs.map((x, j) => (j === i ? { ...x, country: ev.target.value } : x)))} />
                </div>
              </div>
            ))}
            <button className="btn btn-ghost btn-sm" style={{ alignSelf: "flex-start" }} onClick={() => setAddrs([...addrs, { key: newKey("a"), ctx: "private", street: "", city: "", region: "", postcode: "", country: "" }])}><Plus size={14} />  {t("Add address")}</button>
          </div>
        </div>
        <div className="field-row">
          <div className="field"><label>{t("Birthday")}</label><DateField aria-label={t("Birthday")} value={birthday} onChange={setBirthday} /></div>
          <div className="field"><label>{t("Website")}</label><input className="input" value={website} onChange={(e) => setWebsite(e.target.value)} placeholder={t("https://")} /></div>
        </div>
        <div className="field"><label>{t("Notes")}</label><textarea className="textarea" value={note} onChange={(e) => setNote(e.target.value)} /></div>
      </div>
    </Dialog>
  );
}