"use client";

// components/EditEntityModal.tsx
// Pre-filled edit form for existing director or company records.
// Opens from the Edit button on a table row or from the detail page.
// PUT/PATCH via /api/pb/records/:id, invalidates list + detail cache.

import { useState, useEffect } from "react";
import { useQueryClient } from "@tanstack/react-query";
import { pbPatch, pbList } from "@/lib/api";

interface Director {
  id: string;
  surname?: string | null;
  first_names?: string | null;
  id_no?: string | null;
  telephone?: string | null;
  email?: string | null;
  postal_address?: string | null;
  director_type?: string | null;
  notes?: string | null;
}

interface Company {
  id: string;
  enterprise_no?: string | null;
  enterprise_name?: string | null;
  enterprise_type?: string | null;
  registration_date?: string | null;
  physical_address?: string | null;
  postal_address?: string | null;
  director?: string | null;
  notes?: string | null;
  sars_login_username?: string | null;
  sars_login_password?: string | null;
  sars_paye_no?: string | null;
  sars_vat_no?: string | null;
  sars_tax_number?: string | null;
  sars_vat_returns_period?: number | null;
  sars_paye_return_period?: number | null;
  groups?: string[] | null;
}

interface GroupOption {
  id: string;
  name: string;
  description?: string | null;
}

interface Props {
  entity: "director" | "company";
  /** Original record data for pre-filling the form */
  record: Director | Company;
  open: boolean;
  onClose: () => void;
  /** Called after a successful save */
  onAfterSave?: () => void;
}

export default function EditEntityModal({ entity, record, open, onClose, onAfterSave }: Props) {
  const qc = useQueryClient();
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  // Director fields
  const [surname, setSurname] = useState("");
  const [firstNames, setFirstNames] = useState("");
  const [idNo, setIdNo] = useState("");
  const [telephone, setTelephone] = useState("");
  const [email, setEmail] = useState("");
  const [postalAddress, setPostalAddress] = useState("");
  const [directorType, setDirectorType] = useState("");
  const [notes, setNotes] = useState("");

  // Company fields
  const [enterpriseNo, setEnterpriseNo] = useState("");
  const [enterpriseName, setEnterpriseName] = useState("");
  const [enterpriseType, setEnterpriseType] = useState("");
  const [registrationDate, setRegistrationDate] = useState("");
  const [physicalAddress, setPhysicalAddress] = useState("");
  const [postalAddressCo, setPostalAddressCo] = useState("");
  const [notesCo, setNotesCo] = useState("");
  // SARS fields
  const [sarsLoginUsername, setSarsLoginUsername] = useState("");
  const [sarsLoginPassword, setSarsLoginPassword] = useState("");
  const [sarsPayeNo, setSarsPayeNo] = useState("");
  const [sarsVatNo, setSarsVatNo] = useState("");
  const [sarsTaxNo, setSarsTaxNo] = useState("");
  const [sarsVatReturnsPeriod, setSarsVatReturnsPeriod] = useState("");
  const [sarsPayeReturnPeriod, setSarsPayeReturnPeriod] = useState("");

  // Group fields
  const [selectedGroups, setSelectedGroups] = useState<string[]>([]);
  const [groupOptions, setGroupOptions] = useState<GroupOption[]>([]);

  // Populate form when modal opens or record changes
  useEffect(() => {
    if (!open) return;
    setError(null);

    if (entity === "director") {
      const d = record as Director;
      setSurname(d.surname ?? "");
      setFirstNames(d.first_names ?? "");
      setIdNo(d.id_no ?? "");
      setTelephone(d.telephone ?? "");
      setEmail(d.email ?? "");
      setPostalAddress(d.postal_address ?? "");
      setDirectorType(d.director_type ?? "");
      setNotes(d.notes ?? "");
    } else {
      const c = record as Company;
      setEnterpriseNo(c.enterprise_no ?? "");
      setEnterpriseName(c.enterprise_name ?? "");
      setEnterpriseType(c.enterprise_type ?? "");
      setRegistrationDate(c.registration_date ?? "");
      setPhysicalAddress(c.physical_address ?? "");
      setPostalAddressCo(c.postal_address ?? "");
      setNotesCo(c.notes ?? "");
      setSarsLoginUsername(c.sars_login_username ?? "");
      setSarsLoginPassword(c.sars_login_password ?? "");
      setSarsPayeNo(c.sars_paye_no ?? "");
      setSarsVatNo(c.sars_vat_no ?? "");
      setSarsTaxNo(c.sars_tax_number ?? "");
      setSarsVatReturnsPeriod(c.sars_vat_returns_period != null ? String(c.sars_vat_returns_period) : "");
      setSarsPayeReturnPeriod(c.sars_paye_return_period != null ? String(c.sars_paye_return_period) : "");
      setSelectedGroups(c.groups ?? []);
    }
  }, [open, entity, record]);

  // Fetch group options when modal opens (company entity only)
  useEffect(() => {
    if (!open || entity !== "company") return;
    pbList<GroupOption>({ collection: "groups", perPage: 200, sort: "name" })
      .then((res) => setGroupOptions(res.items))
      .catch(() => {});
  }, [open, entity]);

  if (!open) return null;

  const isDirector = entity === "director";
  const title = isDirector ? `Edit director — ${(record as Director).surname}, ${(record as Director).first_names}` : `Edit company — ${(record as Company).enterprise_name}`;
  const collection = isDirector ? "ysterbaard_directors" : "ysterbaard_companies";

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setError(null);
    setLoading(true);

    try {
      const fields: Record<string, string | number | string[]> = {};

      if (isDirector) {
        if (!surname.trim() || !firstNames.trim()) {
          setError("Surname and first names are required.");
          setLoading(false);
          return;
        }
        fields.surname = surname.trim();
        fields.first_names = firstNames.trim();
        if (idNo.trim()) fields.id_no = idNo.trim();
        if (telephone.trim()) fields.telephone = telephone.trim();
        if (email.trim()) fields.email = email.trim();
        if (postalAddress.trim()) fields.postal_address = postalAddress.trim();
        if (directorType.trim()) fields.director_type = directorType.trim();
        if (notes.trim()) fields.notes = notes.trim();
      } else {
        if (!enterpriseNo.trim() || !enterpriseName.trim()) {
          setError("Enterprise number and name are required.");
          setLoading(false);
          return;
        }
        fields.enterprise_no = enterpriseNo.trim().toUpperCase();
        fields.enterprise_name = enterpriseName.trim().toUpperCase();
        if (enterpriseType.trim()) fields.enterprise_type = enterpriseType.trim();
        if (registrationDate.trim()) fields.registration_date = registrationDate.trim();
        if (physicalAddress.trim()) fields.physical_address = physicalAddress.trim();
        if (postalAddressCo.trim()) fields.postal_address = postalAddressCo.trim();
        if (notesCo.trim()) fields.notes = notesCo.trim();
        if (sarsLoginUsername.trim()) fields.sars_login_username = sarsLoginUsername.trim();
        if (sarsLoginPassword.trim()) fields.sars_login_password = sarsLoginPassword.trim();
        if (sarsPayeNo.trim()) fields.sars_paye_no = sarsPayeNo.trim();
        if (sarsVatNo.trim()) fields.sars_vat_no = sarsVatNo.trim();
        if (sarsTaxNo.trim()) fields.sars_tax_number = sarsTaxNo.trim();
        // Period fields: store the selected numeric value as string (PocketBase number field accepts string->number conversion)
        const vatPeriod = sarsVatReturnsPeriod;
        const payePeriod = sarsPayeReturnPeriod;
        if (vatPeriod !== "" || (record as Company).sars_vat_returns_period != null) {
          fields.sars_vat_returns_period = vatPeriod !== "" ? Number(vatPeriod) : 0;
        }
        if (payePeriod !== "" || (record as Company).sars_paye_return_period != null) {
          fields.sars_paye_return_period = payePeriod !== "" ? Number(payePeriod) : 0;
        }
        // Groups — always send current selection (empty array is valid to clear)
        fields.groups = selectedGroups;
      }

      await pbPatch({ collection, id: record.id, fields });

      // Invalidate both list and detail caches
      await qc.invalidateQueries({ queryKey: ["pb-list", collection] });
      await qc.invalidateQueries({ queryKey: ["director", record.id] });
      await qc.invalidateQueries({ queryKey: ["company", record.id] });

      onAfterSave?.();
      onClose();
    } catch (err) {
      setError(err instanceof Error ? err.message : "Something went wrong. Please try again.");
    } finally {
      setLoading(false);
    }
  };

  return (
    <div
      className="fixed inset-0 z-50 flex items-center justify-center bg-black/50 backdrop-blur-sm p-4"
      role="dialog"
      aria-modal="true"
      aria-label={title}
    >
      <div className="bg-surface border border-border rounded-xl shadow-2xl w-full max-w-lg flex flex-col max-h-[90vh]">
        {/* Header */}
        <div className="px-6 pt-6 pb-4 border-b border-border flex-shrink-0">
          <div className="flex items-start justify-between">
            <div>
              <h2 className="text-lg font-bold text-fg">Edit {isDirector ? "director" : "company"}</h2>
              <p className="text-sm text-muted mt-0.5">{title}</p>
            </div>
            <button
              onClick={onClose}
              className="ml-4 text-muted hover:text-fg text-xl leading-none p-1 rounded transition-colors"
              aria-label="Close"
            >
              ×
            </button>
          </div>
        </div>

        {/* Form */}
        <form onSubmit={handleSubmit} className="flex-1 overflow-y-auto px-6 py-5 space-y-4">
          {error && (
            <div className="bg-red-500/10 border border-red-500/30 rounded-lg px-4 py-3 text-sm text-red-400">
              {error}
            </div>
          )}

          {isDirector ? (
            <>
              <div className="grid grid-cols-2 gap-4">
                <div>
                  <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-surname">Surname <span className="text-red-400">*</span></label>
                  <input id="edit-surname" type="text" value={surname}
                    onChange={(e) => setSurname(e.target.value.toUpperCase())}
                    className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent"
                    required />
                </div>
                <div>
                  <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-firstnames">First names <span className="text-red-400">*</span></label>
                  <input id="edit-firstnames" type="text" value={firstNames}
                    onChange={(e) => setFirstNames(e.target.value.toUpperCase())}
                    className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent"
                    required />
                </div>
              </div>

              <div>
                <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-idno">SA ID number <span className="text-xs text-muted font-normal">(optional)</span></label>
                <input id="edit-idno" type="tel" value={idNo}
                  onChange={(e) => setIdNo(e.target.value.replace(/\D/g, "").slice(0, 13))}
                  className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg font-mono focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent"
                  maxLength={13} />
              </div>

              <div className="grid grid-cols-2 gap-4">
                <div>
                  <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-tel">Telephone <span className="text-xs text-muted font-normal">(optional)</span></label>
                  <input id="edit-tel" type="tel" value={telephone}
                    onChange={(e) => setTelephone(e.target.value)}
                    className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent" />
                </div>
                <div>
                  <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-email">Email <span className="text-xs text-muted font-normal">(optional)</span></label>
                  <input id="edit-email" type="email" value={email}
                    onChange={(e) => setEmail(e.target.value)}
                    className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent" />
                </div>
              </div>

              <div>
                <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-postal">Postal address <span className="text-xs text-muted font-normal">(optional)</span></label>
                <textarea id="edit-postal" value={postalAddress} rows={2}
                  onChange={(e) => setPostalAddress(e.target.value)}
                  className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg resize-none focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent" />
              </div>

              <div>
                <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-type">Director type <span className="text-xs text-muted font-normal">(optional)</span></label>
                <input id="edit-type" type="text" value={directorType}
                  onChange={(e) => setDirectorType(e.target.value)}
                  className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent"
                  placeholder="e.g. Individual, Corporate" />
              </div>

              <div>
                <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-notes">Notes <span className="text-xs text-muted font-normal">(optional)</span></label>
                <textarea id="edit-notes" value={notes} rows={2}
                  onChange={(e) => setNotes(e.target.value)}
                  className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg resize-none focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent" />
              </div>
            </>
          ) : (
            <>
              <div className="grid grid-cols-2 gap-4">
                <div>
                  <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-eno">Enterprise No. <span className="text-red-400">*</span></label>
                  <input id="edit-eno" type="text" value={enterpriseNo}
                    onChange={(e) => setEnterpriseNo(e.target.value.toUpperCase())}
                    className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg font-mono focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent"
                    required />
                </div>
                <div>
                  <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-etype">Enterprise type <span className="text-xs text-muted font-normal">(optional)</span></label>
                  <input id="edit-etype" type="text" value={enterpriseType}
                    onChange={(e) => setEnterpriseType(e.target.value)}
                    className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent"
                    placeholder="Private Company" />
                </div>
              </div>

              <div>
                <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-ename">Enterprise name <span className="text-red-400">*</span></label>
                <input id="edit-ename" type="text" value={enterpriseName}
                  onChange={(e) => setEnterpriseName(e.target.value.toUpperCase())}
                  className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent"
                  required />
              </div>

              <div>
                <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-rdate">Registration date <span className="text-xs text-muted font-normal">(optional)</span></label>
                <input id="edit-rdate" type="date" value={registrationDate}
                  onChange={(e) => setRegistrationDate(e.target.value)}
                  className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent" />
              </div>

              <div>
                <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-phys">Physical address <span className="text-xs text-muted font-normal">(optional)</span></label>
                <textarea id="edit-phys" value={physicalAddress} rows={2}
                  onChange={(e) => setPhysicalAddress(e.target.value)}
                  className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg resize-none focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent" />
              </div>

              <div>
                <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-postalco">Postal address <span className="text-xs text-muted font-normal">(optional)</span></label>
                <textarea id="edit-postalco" value={postalAddressCo} rows={2}
                  onChange={(e) => setPostalAddressCo(e.target.value)}
                  className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg resize-none focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent" />
              </div>

              <div>
                <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-notesco">Notes <span className="text-xs text-muted font-normal">(optional)</span></label>
                <textarea id="edit-notesco" value={notesCo} rows={2}
                  onChange={(e) => setNotesCo(e.target.value)}
                  className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg resize-none focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent" />
              </div>

              {/* Group membership */}
              <div>
                <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-groups">Group Membership <span className="text-xs text-muted font-normal">(optional)</span></label>
                <p className="text-xs text-muted mb-2">Hold Ctrl (or Cmd on Mac) to select multiple groups.</p>
                <select
                  id="edit-groups"
                  multiple
                  value={selectedGroups}
                  onChange={(e) => {
                    const opts = Array.from(e.target.selectedOptions).map((o) => o.value);
                    setSelectedGroups(opts);
                  }}
                  className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent min-h-[100px]">
                  {groupOptions.length === 0 ? (
                    <option value="" disabled>No groups created yet — save and add groups via PocketBase</option>
                  ) : (
                    groupOptions.map((g) => (
                      <option key={g.id} value={g.id}>{g.name}</option>
                    ))
                  )}
                </select>
              </div>

              {/* SARS credentials */}
              <div className="border-t border-border pt-4 mt-2">
                <p className="text-sm font-semibold text-fg mb-3">SARS eFiling Details</p>
                <div className="grid grid-cols-2 gap-4">
                  <div>
                    <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-sars-user">SARS Login Username <span className="text-xs text-muted font-normal">(optional)</span></label>
                    <input id="edit-sars-user" type="text" value={sarsLoginUsername}
                      onChange={(e) => setSarsLoginUsername(e.target.value)}
                      className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent"
                      placeholder="eFiling username" />
                  </div>
                  <div>
                    <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-sars-pass">SARS Login Password <span className="text-xs text-muted font-normal">(optional)</span></label>
                    <input id="edit-sars-pass" type="text" value={sarsLoginPassword}
                      onChange={(e) => setSarsLoginPassword(e.target.value)}
                      className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent"
                      placeholder="eFiling password" />
                  </div>
                </div>
                <div className="grid grid-cols-2 gap-4 mt-3">
                  <div>
                    <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-sars-paye">SARS PAYE No. <span className="text-xs text-muted font-normal">(optional)</span></label>
                    <input id="edit-sars-paye" type="text" value={sarsPayeNo}
                      onChange={(e) => setSarsPayeNo(e.target.value)}
                      className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg font-mono focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent"
                      placeholder="e.g. 7020829828" />
                  </div>
                  <div>
                    <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-sars-vat">SARS VAT No. <span className="text-xs text-muted font-normal">(optional)</span></label>
                    <input id="edit-sars-vat" type="text" value={sarsVatNo}
                      onChange={(e) => setSarsVatNo(e.target.value)}
                      className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg font-mono focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent"
                      placeholder="e.g. 4123456789" />
                  </div>
                </div>
                <div className="mt-3">
                  <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-sars-tax">SARS Tax No. <span className="text-xs text-muted font-normal">(optional)</span></label>
                  <input id="edit-sars-tax" type="text" value={sarsTaxNo}
                    onChange={(e) => setSarsTaxNo(e.target.value)}
                    className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg font-mono focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent"
                    placeholder="e.g. 9004615283" />
                </div>
                <div className="grid grid-cols-2 gap-4 mt-3">
                  <div>
                    <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-sars-vat-period">SARS VAT Returns Period</label>
                    <select id="edit-sars-vat-period" value={sarsVatReturnsPeriod}
                      onChange={(e) => setSarsVatReturnsPeriod(e.target.value)}
                      className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent">
                      <option value="">— select —</option>
                      <option value="0">None</option>
                      <option value="1">Every Month</option>
                      <option value="2">Even Month</option>
                      <option value="3">Uneven Months</option>
                      <option value="6">Bi Annually</option>
                      <option value="12">Annually</option>
                    </select>
                  </div>
                  <div>
                    <label className="block text-sm font-semibold text-fg mb-1.5" htmlFor="edit-sars-paye-period">SARS PAYE Returns Period</label>
                    <select id="edit-sars-paye-period" value={sarsPayeReturnPeriod}
                      onChange={(e) => setSarsPayeReturnPeriod(e.target.value)}
                      className="w-full rounded-lg border border-border bg-surface-warm px-3 py-2.5 text-sm text-fg focus:outline-none focus:border-accent focus:ring-1 focus:ring-accent">
                      <option value="">— select —</option>
                      <option value="0">None</option>
                      <option value="1">Every month</option>
                    </select>
                  </div>
                </div>
              </div>
            </>
          )}

          <div className="pt-2 flex gap-3">
            <button type="button" onClick={onClose}
              className="flex-1 px-4 py-2.5 rounded-lg border border-border bg-surface-warm text-sm font-semibold text-fg hover:bg-surface transition-colors">
              Cancel
            </button>
            <button type="submit" disabled={loading}
              className="flex-1 px-4 py-2.5 rounded-lg bg-accent text-accent-on text-sm font-bold hover:bg-accent-hover transition-colors disabled:opacity-60 disabled:cursor-not-allowed">
              {loading ? "Saving..." : "Save changes"}
            </button>
          </div>
        </form>
      </div>
    </div>
  );
}