import { useState, useRef } from "react";
import { motion, AnimatePresence } from "framer-motion";
import { useAuth } from "../../context/AuthContext";
import { useAlert } from "../../context/AlertContext";
import useModalLock from "../../hooks/useModalLock";
import apiFetch from "../../utils/api";

const API_BASE = "/api/admin";

interface DashProfileProps {
  totpEnabled: boolean;
  totpLoading: boolean;
  totpSubmitting: boolean;
  onStart2FASetup: () => void;
  onConfirm2FA: () => void;
  onDisable2FA: () => void;
  totpSecret: string | null;
  totpQrUri: string | null;
  totpCode: string;
  setTotpCode: (code: string) => void;
  backupCodes: string[] | null;
  setBackupCodes: (codes: string[] | null) => void;
  show2FASetup: boolean;
  setShow2FASetup: (show: boolean) => void;
  show2FADisable: boolean;
  setShow2FADisable: (show: boolean) => void;
  disableCode: string;
  setDisableCode: (code: string) => void;
}

interface ProfileFormData {
  username: string;
  email: string;
  new_password: string;
  current_password: string;
  first_name: string;
  last_name: string;
}

export default function DashProfile({
  totpEnabled,
  totpLoading,
  totpSubmitting,
  onStart2FASetup,
  onConfirm2FA,
  onDisable2FA,
  totpSecret,
  totpQrUri,
  totpCode,
  setTotpCode,
  backupCodes,
  setBackupCodes,
  show2FASetup,
  setShow2FASetup,
  show2FADisable,
  setShow2FADisable,
  disableCode,
  setDisableCode,
}: DashProfileProps) {
  const { user, updateUser } = useAuth();
  const alert = useAlert();
  const totpSetupRef = useRef<HTMLInputElement>(null);

  const [showModal, setShowModal] = useState(false);
  const [formData, setFormData] = useState<ProfileFormData>({
    username: "",
    email: "",
    new_password: "",
    current_password: "",
    first_name: "",
    last_name: "",
  });

  useModalLock(showModal);

  const openEditModal = () => {
    const nameParts = (user?.fullName || "").split(" ");
    setFormData({
      username: user?.username || "",
      email: user?.email || "",
      new_password: "",
      current_password: "",
      first_name: nameParts[0] || "",
      last_name: nameParts.slice(1).join(" ") || "",
    });
    setShowModal(true);
  };

  const handleSubmit = async (e?: React.FormEvent) => {
    e?.preventDefault();
    const dataToSave = { ...formData };

    if (dataToSave.new_password && !dataToSave.current_password) {
      alert.error("Pro změnu hesla zadejte aktuální heslo");
      return;
    }
    if (dataToSave.current_password && !dataToSave.new_password) {
      alert.error("Pro změnu hesla zadejte nové heslo");
      return;
    }

    // Strip empty password fields so Zod doesn't reject ""
    if (!dataToSave.current_password)
      delete (dataToSave as any).current_password;
    if (!dataToSave.new_password) delete (dataToSave as any).new_password;

    try {
      const response = await apiFetch(`${API_BASE}/profile`, {
        method: "PUT",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(dataToSave),
      });
      const data = await response.json();
      if (data.success) {
        updateUser({
          username: dataToSave.username,
          email: dataToSave.email,
          fullName: `${dataToSave.first_name} ${dataToSave.last_name}`.trim(),
        });
        setShowModal(false);
        await new Promise((resolve) => setTimeout(resolve, 300));
        alert.success("Profil byl upraven");
      } else {
        alert.error(data.error || "Nepodařilo se uložit profil");
      }
    } catch {
      alert.error("Chyba připojení");
    }
  };

  function getTotpStatusText(): string {
    if (totpLoading) {
      return "Načítání...";
    }
    return totpEnabled ? "Aktivní" : "Neaktivní";
  }

  return (
    <>
      <motion.div
        className="admin-card"
        initial={{ opacity: 0, y: 12 }}
        animate={{ opacity: 1, y: 0 }}
        transition={{ duration: 0.25, delay: 0.15 }}
      >
        <div className="admin-card-header flex-between">
          <h2 className="admin-card-title">Váš účet</h2>
          <button
            onClick={openEditModal}
            className="admin-btn admin-btn-secondary admin-btn-sm"
          >
            <svg
              width="14"
              height="14"
              viewBox="0 0 24 24"
              fill="none"
              stroke="currentColor"
              strokeWidth="2"
            >
              <path d="M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7" />
              <path d="M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z" />
            </svg>
            Upravit
          </button>
        </div>
        <div className="admin-card-body">
          <div className="dash-profile-grid">
            <div className="dash-profile-item">
              <span className="dash-profile-label">Uživatel</span>
              <span className="dash-profile-value">{user?.username}</span>
            </div>
            <div className="dash-profile-item">
              <span className="dash-profile-label">E-mail</span>
              <span className="dash-profile-value">{user?.email}</span>
            </div>
            <div className="dash-profile-item">
              <span className="dash-profile-label">Jméno</span>
              <span className="dash-profile-value">{user?.fullName}</span>
            </div>
            <div className="dash-profile-item">
              <span className="dash-profile-label">Role</span>
              <span className="dash-profile-value">
                {user?.roleDisplay || String(user?.role || "")}
              </span>
            </div>
          </div>

          {/* 2FA Section */}
          <div
            style={{
              borderTop: "1px solid var(--border-color)",
              marginTop: "1rem",
              paddingTop: "1rem",
            }}
          >
            <div className="flex-between">
              <div className="flex-row-gap">
                <div
                  style={{
                    width: 36,
                    height: 36,
                    borderRadius: "50%",
                    display: "flex",
                    alignItems: "center",
                    justifyContent: "center",
                    background: totpEnabled
                      ? "var(--success-light)"
                      : "rgba(var(--text-secondary-rgb, 107, 114, 128), 0.1)",
                    color: totpEnabled
                      ? "var(--success)"
                      : "var(--text-secondary)",
                  }}
                >
                  <svg
                    width="18"
                    height="18"
                    viewBox="0 0 24 24"
                    fill="none"
                    stroke="currentColor"
                    strokeWidth="2"
                  >
                    <rect x="3" y="11" width="18" height="11" rx="2" ry="2" />
                    <path d="M7 11V7a5 5 0 0 1 10 0v4" />
                  </svg>
                </div>
                <div>
                  <div style={{ fontWeight: 500, fontSize: "0.875rem" }}>
                    Dvoufaktorové ověření (2FA)
                  </div>
                  <div
                    className={totpEnabled ? "text-success" : "text-secondary"}
                    style={{ fontSize: "0.75rem" }}
                  >
                    {getTotpStatusText()}
                  </div>
                </div>
              </div>
              {!totpLoading &&
                (totpEnabled ? (
                  <button
                    onClick={() => {
                      setDisableCode("");
                      setShow2FADisable(true);
                    }}
                    className="admin-btn admin-btn-primary admin-btn-sm"
                  >
                    Deaktivovat
                  </button>
                ) : (
                  <button
                    onClick={onStart2FASetup}
                    disabled={totpSubmitting}
                    className="admin-btn admin-btn-primary admin-btn-sm"
                  >
                    {totpSubmitting ? "Generuji..." : "Aktivovat"}
                  </button>
                ))}
            </div>
          </div>
        </div>
      </motion.div>

      {/* Edit Profile Modal */}
      <AnimatePresence>
        {showModal && (
          <motion.div
            className="admin-modal-overlay"
            initial={{ opacity: 0 }}
            animate={{ opacity: 1 }}
            exit={{ opacity: 0 }}
            transition={{ duration: 0.2 }}
          >
            <div
              className="admin-modal-backdrop"
              onClick={() => setShowModal(false)}
            />
            <motion.div
              className="admin-modal"
              initial={{ opacity: 0, scale: 0.95, y: 20 }}
              animate={{ opacity: 1, scale: 1, y: 0 }}
              exit={{ opacity: 0, scale: 0.95, y: 20 }}
              transition={{ duration: 0.2 }}
            >
              <div className="admin-modal-header">
                <h2 className="admin-modal-title">Upravit profil</h2>
              </div>
              <div className="admin-modal-body">
                <div className="admin-form">
                  <div className="admin-form-row">
                    <div className="admin-form-group">
                      <label className="admin-form-label">Jméno</label>
                      <input
                        type="text"
                        value={formData.first_name}
                        onChange={(e) =>
                          setFormData({
                            ...formData,
                            first_name: e.target.value,
                          })
                        }
                        required
                        className="admin-form-input"
                      />
                    </div>
                    <div className="admin-form-group">
                      <label className="admin-form-label">Příjmení</label>
                      <input
                        type="text"
                        value={formData.last_name}
                        onChange={(e) =>
                          setFormData({
                            ...formData,
                            last_name: e.target.value,
                          })
                        }
                        required
                        className="admin-form-input"
                      />
                    </div>
                  </div>
                  <div className="admin-form-group">
                    <label className="admin-form-label">
                      Uživatelské jméno
                    </label>
                    <input
                      type="text"
                      value={formData.username}
                      onChange={(e) =>
                        setFormData({ ...formData, username: e.target.value })
                      }
                      required
                      className="admin-form-input"
                    />
                  </div>
                  <div className="admin-form-group">
                    <label className="admin-form-label">E-mail</label>
                    <input
                      type="email"
                      value={formData.email}
                      onChange={(e) =>
                        setFormData({ ...formData, email: e.target.value })
                      }
                      required
                      className="admin-form-input"
                    />
                  </div>
                  <div className="admin-form-group">
                    <label className="admin-form-label">Aktuální heslo</label>
                    <input
                      type="password"
                      value={formData.current_password}
                      onChange={(e) =>
                        setFormData({
                          ...formData,
                          current_password: e.target.value,
                        })
                      }
                      className="admin-form-input"
                      placeholder="Pro změnu hesla, zadejte aktuální heslo"
                    />
                  </div>
                  <div className="admin-form-group">
                    <label className="admin-form-label">
                      Nové heslo
                    </label>
                    <input
                      type="password"
                      value={formData.new_password}
                      onChange={(e) =>
                        setFormData({
                          ...formData,
                          new_password: e.target.value,
                        })
                      }
                      className="admin-form-input"
                      placeholder="Pro změnu hesla, zadejte nové heslo"
                    />
                  </div>
                </div>
              </div>
              <div className="admin-modal-footer">
                <button
                  type="button"
                  onClick={() => setShowModal(false)}
                  className="admin-btn admin-btn-secondary"
                >
                  Zrušit
                </button>
                <button
                  type="button"
                  onClick={handleSubmit}
                  className="admin-btn admin-btn-primary"
                >
                  Uložit změny
                </button>
              </div>
            </motion.div>
          </motion.div>
        )}
      </AnimatePresence>

      {/* 2FA Setup Modal */}
      <AnimatePresence>
        {show2FASetup && (
          <motion.div
            className="admin-modal-overlay"
            initial={{ opacity: 0 }}
            animate={{ opacity: 1 }}
            exit={{ opacity: 0 }}
            transition={{ duration: 0.2 }}
          >
            <div
              className="admin-modal-backdrop"
              onClick={() => {
                if (!backupCodes) {
                  setShow2FASetup(false);
                }
              }}
            />
            <motion.div
              className="admin-modal"
              initial={{ opacity: 0, scale: 0.95, y: 20 }}
              animate={{ opacity: 1, scale: 1, y: 0 }}
              exit={{ opacity: 0, scale: 0.95, y: 20 }}
              transition={{ duration: 0.2 }}
            >
              <div className="admin-modal-header">
                <h2 className="admin-modal-title">
                  {backupCodes ? "Záložní kódy" : "Nastavení 2FA"}
                </h2>
              </div>
              <div className="admin-modal-body">
                {backupCodes ? (
                  <div>
                    <div className="admin-role-locked-notice mb-4">
                      <svg
                        width="16"
                        height="16"
                        viewBox="0 0 24 24"
                        fill="none"
                        stroke="currentColor"
                        strokeWidth="2"
                      >
                        <path d="M10.29 3.86L1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0z" />
                        <line x1="12" y1="9" x2="12" y2="13" />
                        <line x1="12" y1="17" x2="12.01" y2="17" />
                      </svg>
                      Uložte si tyto kódy na bezpečné místo. Každý kód lze
                      použít pouze jednou. Po zavření tohoto okna je již
                      neuvidíte.
                    </div>
                    <div
                      style={{
                        display: "grid",
                        gridTemplateColumns: "repeat(2, 1fr)",
                        gap: "0.5rem",
                        padding: "1rem",
                        background: "var(--bg-secondary)",
                        borderRadius: "0.5rem",
                        fontFamily: "monospace",
                        fontSize: "1rem",
                      }}
                    >
                      {backupCodes.map((code) => (
                        <div
                          key={code}
                          style={{
                            padding: "0.25rem 0.5rem",
                            textAlign: "center",
                            color: "var(--text-primary)",
                          }}
                        >
                          {code}
                        </div>
                      ))}
                    </div>
                    <div style={{ marginTop: "0.75rem" }}>
                      <button
                        onClick={() => {
                          navigator.clipboard?.writeText(
                            backupCodes.join("\n"),
                          );
                          alert.success("Kódy zkopírovány");
                        }}
                        className="admin-btn admin-btn-secondary admin-btn-sm"
                      >
                        <svg
                          width="14"
                          height="14"
                          viewBox="0 0 24 24"
                          fill="none"
                          stroke="currentColor"
                          strokeWidth="2"
                        >
                          <rect
                            x="9"
                            y="9"
                            width="13"
                            height="13"
                            rx="2"
                            ry="2"
                          />
                          <path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1" />
                        </svg>
                        Kopírovat kódy
                      </button>
                    </div>
                  </div>
                ) : (
                  <div>
                    <p
                      className="text-secondary"
                      style={{ fontSize: "0.875rem", marginBottom: "1rem" }}
                    >
                      Naskenujte QR kód v autentizační aplikaci (Google
                      Authenticator, Authy, Microsoft Authenticator apod.)
                    </p>
                    {totpQrUri && (
                      <div
                        style={{ textAlign: "center", marginBottom: "1rem" }}
                      >
                        <img
                          src={`https://api.qrserver.com/v1/create-qr-code/?size=200x200&data=${encodeURIComponent(totpQrUri)}`}
                          alt="TOTP QR Code"
                          style={{
                            width: 200,
                            height: 200,
                            borderRadius: "0.5rem",
                            border: "1px solid var(--border-color)",
                          }}
                        />
                      </div>
                    )}
                    {totpSecret && (
                      <div className="mb-4">
                        <label
                          className="admin-form-label"
                          style={{ fontSize: "0.75rem" }}
                        >
                          Nebo zadejte klíč ručně:
                        </label>
                        <div
                          style={{
                            padding: "0.5rem 0.75rem",
                            background: "var(--bg-secondary)",
                            borderRadius: "0.375rem",
                            fontFamily: "monospace",
                            fontSize: "0.875rem",
                            wordBreak: "break-all",
                            color: "var(--text-primary)",
                            display: "flex",
                            alignItems: "center",
                            justifyContent: "space-between",
                            gap: "0.5rem",
                          }}
                        >
                          <span>{totpSecret}</span>
                          <button
                            onClick={() => {
                              navigator.clipboard?.writeText(totpSecret);
                              alert.success("Klíč zkopírován");
                            }}
                            className="admin-btn-icon"
                            title="Kopírovat"
                            aria-label="Kopírovat"
                            style={{ flexShrink: 0 }}
                          >
                            <svg
                              width="14"
                              height="14"
                              viewBox="0 0 24 24"
                              fill="none"
                              stroke="currentColor"
                              strokeWidth="2"
                            >
                              <rect
                                x="9"
                                y="9"
                                width="13"
                                height="13"
                                rx="2"
                                ry="2"
                              />
                              <path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1" />
                            </svg>
                          </button>
                        </div>
                      </div>
                    )}
                    <div className="admin-form-group">
                      <label className="admin-form-label">
                        Ověřovací kód z aplikace
                      </label>
                      <input
                        ref={totpSetupRef}
                        type="text"
                        inputMode="numeric"
                        pattern="[0-9]*"
                        maxLength={6}
                        value={totpCode}
                        onChange={(e) =>
                          setTotpCode(e.target.value.replace(/\D/g, ""))
                        }
                        placeholder="000000"
                        className="admin-form-input"
                        style={{
                          textAlign: "center",
                          fontSize: "1.25rem",
                          letterSpacing: "0.4rem",
                          fontFamily: "monospace",
                        }}
                        onKeyDown={(e) => {
                          if (e.key === "Enter" && totpCode.length === 6) {
                            onConfirm2FA();
                          }
                        }}
                      />
                    </div>
                  </div>
                )}
              </div>
              <div className="admin-modal-footer">
                {backupCodes ? (
                  <button
                    onClick={() => {
                      setShow2FASetup(false);
                      setBackupCodes(null);
                    }}
                    className="admin-btn admin-btn-primary"
                  >
                    Rozumím, uložil jsem si kódy
                  </button>
                ) : (
                  <>
                    <button
                      onClick={() => setShow2FASetup(false)}
                      className="admin-btn admin-btn-secondary"
                      disabled={totpSubmitting}
                    >
                      Zrušit
                    </button>
                    <button
                      onClick={onConfirm2FA}
                      className="admin-btn admin-btn-primary"
                      disabled={totpSubmitting || totpCode.length !== 6}
                    >
                      {totpSubmitting ? "Ověřuji..." : "Aktivovat 2FA"}
                    </button>
                  </>
                )}
              </div>
            </motion.div>
          </motion.div>
        )}
      </AnimatePresence>

      {/* 2FA Disable Modal */}
      <AnimatePresence>
        {show2FADisable && (
          <motion.div
            className="admin-modal-overlay"
            initial={{ opacity: 0 }}
            animate={{ opacity: 1 }}
            exit={{ opacity: 0 }}
            transition={{ duration: 0.2 }}
          >
            <div
              className="admin-modal-backdrop"
              onClick={() => setShow2FADisable(false)}
            />
            <motion.div
              className="admin-modal"
              initial={{ opacity: 0, scale: 0.95, y: 20 }}
              animate={{ opacity: 1, scale: 1, y: 0 }}
              exit={{ opacity: 0, scale: 0.95, y: 20 }}
              transition={{ duration: 0.2 }}
            >
              <div className="admin-modal-header">
                <h2 className="admin-modal-title">Deaktivovat 2FA</h2>
              </div>
              <div className="admin-modal-body">
                <p
                  style={{
                    color: "var(--text-secondary)",
                    fontSize: "0.875rem",
                    marginBottom: "1rem",
                  }}
                >
                  Pro deaktivaci dvoufaktorového ověření zadejte aktuální kód z
                  autentizační aplikace.
                </p>
                <div className="admin-form-group">
                  <label className="admin-form-label">Ověřovací kód</label>
                  <input
                    type="text"
                    inputMode="numeric"
                    pattern="[0-9]*"
                    maxLength={6}
                    value={disableCode}
                    onChange={(e) =>
                      setDisableCode(e.target.value.replace(/\D/g, ""))
                    }
                    placeholder="000000"
                    className="admin-form-input"
                    style={{
                      textAlign: "center",
                      fontSize: "1.25rem",
                      letterSpacing: "0.4rem",
                      fontFamily: "monospace",
                    }}
                    onKeyDown={(e) => {
                      if (e.key === "Enter" && disableCode.length === 6) {
                        onDisable2FA();
                      }
                    }}
                    autoFocus
                  />
                </div>
              </div>
              <div className="admin-modal-footer">
                <button
                  onClick={() => setShow2FADisable(false)}
                  className="admin-btn admin-btn-secondary"
                  disabled={totpSubmitting}
                >
                  Zrušit
                </button>
                <button
                  onClick={onDisable2FA}
                  className="admin-btn admin-btn-primary"
                  disabled={totpSubmitting || disableCode.length !== 6}
                >
                  {totpSubmitting ? "Deaktivuji..." : "Deaktivovat 2FA"}
                </button>
              </div>
            </motion.div>
          </motion.div>
        )}
      </AnimatePresence>
    </>
  );
}