"use client";

import { useState, useEffect, useRef, useCallback } from "react";
import { STATUS_OPTIONS, STATUS_MAP } from "./StatusBadge";

interface Lead {
  id: string;
  domain: string | null;
  companyName: string | null;
  contactName: string | null;
  contactTitle: string | null;
  email: string | null;
  linkedinUrl: string | null;
  phone: string | null;
  industry: string | null;
  sourceTerm: string | null;
  address: string | null;
  status: string;
  notes: string | null;
  capturedAt: string;
}

interface LeadSidePanelProps {
  lead: Lead;
  onClose: () => void;
  onUpdate: (id: string, updates: Partial<Lead>) => void;
}

function formatDate(iso: string) {
  return new Date(iso).toLocaleDateString("de-DE", {
    day: "2-digit",
    month: "2-digit",
    year: "numeric",
  });
}

export function LeadSidePanel({ lead, onClose, onUpdate }: LeadSidePanelProps) {
  const [notes, setNotes] = useState(lead.notes || "");
  const [status, setStatus] = useState(lead.status);
  const [saved, setSaved] = useState(false);
  const saveTimeout = useRef<ReturnType<typeof setTimeout> | null>(null);

  useEffect(() => {
    setNotes(lead.notes || "");
    setStatus(lead.status);
  }, [lead.id, lead.notes, lead.status]);

  const saveNotes = useCallback(
    async (value: string) => {
      try {
        await fetch(`/api/leads/${lead.id}`, {
          method: "PATCH",
          headers: { "Content-Type": "application/json" },
          body: JSON.stringify({ notes: value }),
        });
        onUpdate(lead.id, { notes: value });
        setSaved(true);
        setTimeout(() => setSaved(false), 2000);
      } catch {
        // silently fail
      }
    },
    [lead.id, onUpdate]
  );

  function handleNotesChange(e: React.ChangeEvent<HTMLTextAreaElement>) {
    const val = e.target.value;
    setNotes(val);
    if (saveTimeout.current) clearTimeout(saveTimeout.current);
    saveTimeout.current = setTimeout(() => saveNotes(val), 500);
  }

  async function handleStatusChange(e: React.ChangeEvent<HTMLSelectElement>) {
    const newStatus = e.target.value;
    setStatus(newStatus);
    try {
      await fetch(`/api/leads/${lead.id}`, {
        method: "PATCH",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ status: newStatus }),
      });
      onUpdate(lead.id, { status: newStatus });
    } catch {
      // silently fail
    }
  }

  async function copyEmail() {
    if (lead.email) {
      await navigator.clipboard.writeText(lead.email);
    }
  }

  return (
    <>
      {/* Backdrop */}
      <div
        onClick={onClose}
        style={{
          position: "fixed",
          inset: 0,
          background: "rgba(0,0,0,0.4)",
          zIndex: 300,
        }}
      />
      {/* Panel */}
      <div
        style={{
          position: "fixed",
          top: 0,
          right: 0,
          bottom: 0,
          width: 380,
          background: "#111118",
          borderLeft: "1px solid #1e1e2e",
          zIndex: 400,
          overflowY: "auto",
          padding: 24,
          animation: "slideInRight 0.2s ease",
        }}
      >
        {/* Header */}
        <div
          style={{
            display: "flex",
            justifyContent: "space-between",
            alignItems: "flex-start",
            marginBottom: 20,
          }}
        >
          <div>
            <div style={{ fontSize: 15, fontWeight: 500, color: "#ffffff", marginBottom: 2 }}>
              {lead.companyName || lead.domain || "Unbekannt"}
            </div>
            {lead.domain && (
              <div style={{ fontSize: 11, color: "#6b7280" }}>{lead.domain}</div>
            )}
          </div>
          <button
            onClick={onClose}
            style={{
              background: "transparent",
              border: "none",
              color: "#6b7280",
              cursor: "pointer",
              fontSize: 18,
              lineHeight: 1,
              padding: 4,
            }}
          >
            &times;
          </button>
        </div>

        {/* Status */}
        <div style={{ marginBottom: 16 }}>
          <label
            style={{
              display: "block",
              fontSize: 11,
              color: "#6b7280",
              textTransform: "uppercase",
              letterSpacing: "0.05em",
              marginBottom: 6,
            }}
          >
            Status
          </label>
          <select
            value={status}
            onChange={handleStatusChange}
            style={{
              width: "100%",
              background: "#0d0d18",
              border: "1px solid #1e1e2e",
              borderRadius: 8,
              padding: "8px 12px",
              fontSize: 13,
              color: STATUS_MAP[status]?.color ?? "#ffffff",
              cursor: "pointer",
              outline: "none",
            }}
          >
            {STATUS_OPTIONS.map((opt) => (
              <option key={opt.value} value={opt.value}>
                {opt.label}
              </option>
            ))}
          </select>
        </div>

        <div style={{ height: 1, background: "#1e1e2e", marginBottom: 16 }} />

        {/* Email */}
        <div style={{ marginBottom: 14 }}>
          <label
            style={{
              display: "block",
              fontSize: 11,
              color: "#6b7280",
              textTransform: "uppercase",
              letterSpacing: "0.05em",
              marginBottom: 6,
            }}
          >
            E-Mail
          </label>
          {lead.email ? (
            <div style={{ display: "flex", alignItems: "center", gap: 8 }}>
              <span
                style={{
                  fontFamily: "monospace",
                  fontSize: 13,
                  color: "#3b82f6",
                  flex: 1,
                  wordBreak: "break-all",
                }}
              >
                {lead.email}
              </span>
              <button
                onClick={copyEmail}
                title="Kopieren"
                style={{
                  background: "#0d0d18",
                  border: "1px solid #1e1e2e",
                  borderRadius: 6,
                  padding: "4px 8px",
                  fontSize: 11,
                  color: "#9ca3af",
                  cursor: "pointer",
                  flexShrink: 0,
                }}
              >
                Kopieren
              </button>
            </div>
          ) : (
            <span style={{ fontSize: 13, color: "#6b7280" }}>— nicht gefunden</span>
          )}
        </div>

        {/* LinkedIn */}
        {lead.linkedinUrl && (
          <div style={{ marginBottom: 14 }}>
            <label
              style={{
                display: "block",
                fontSize: 11,
                color: "#6b7280",
                textTransform: "uppercase",
                letterSpacing: "0.05em",
                marginBottom: 6,
              }}
            >
              LinkedIn
            </label>
            <a
              href={lead.linkedinUrl}
              target="_blank"
              rel="noopener noreferrer"
              style={{ fontSize: 13, color: "#3b82f6", wordBreak: "break-all" }}
            >
              {lead.linkedinUrl}
            </a>
          </div>
        )}

        {/* Phone */}
        {lead.phone && (
          <div style={{ marginBottom: 14 }}>
            <label
              style={{
                display: "block",
                fontSize: 11,
                color: "#6b7280",
                textTransform: "uppercase",
                letterSpacing: "0.05em",
                marginBottom: 6,
              }}
            >
              Telefon
            </label>
            <span style={{ fontSize: 13, color: "#ffffff" }}>{lead.phone}</span>
          </div>
        )}

        {/* Industry */}
        {lead.industry && (
          <div style={{ marginBottom: 14 }}>
            <label
              style={{
                display: "block",
                fontSize: 11,
                color: "#6b7280",
                textTransform: "uppercase",
                letterSpacing: "0.05em",
                marginBottom: 6,
              }}
            >
              Branche
            </label>
            <span style={{ fontSize: 13, color: "#9ca3af" }}>{lead.industry}</span>
          </div>
        )}

        {/* Region */}
        {(lead.sourceTerm || lead.address) && (
          <div style={{ marginBottom: 14 }}>
            <label
              style={{
                display: "block",
                fontSize: 11,
                color: "#6b7280",
                textTransform: "uppercase",
                letterSpacing: "0.05em",
                marginBottom: 6,
              }}
            >
              Region
            </label>
            <span style={{ fontSize: 13, color: "#9ca3af" }}>
              {lead.address ?? lead.sourceTerm}
            </span>
          </div>
        )}

        <div style={{ height: 1, background: "#1e1e2e", marginBottom: 16 }} />

        {/* Notes */}
        <div style={{ marginBottom: 14 }}>
          <div
            style={{
              display: "flex",
              justifyContent: "space-between",
              alignItems: "center",
              marginBottom: 6,
            }}
          >
            <label
              style={{
                fontSize: 11,
                color: "#6b7280",
                textTransform: "uppercase",
                letterSpacing: "0.05em",
              }}
            >
              Notiz
            </label>
            {saved && (
              <span style={{ fontSize: 11, color: "#22c55e" }}>Gespeichert ✓</span>
            )}
          </div>
          <textarea
            value={notes}
            onChange={handleNotesChange}
            placeholder="Notizen zu diesem Lead…"
            rows={4}
            style={{
              width: "100%",
              background: "#0d0d18",
              border: "1px solid #1e1e2e",
              borderRadius: 8,
              padding: "8px 12px",
              fontSize: 13,
              color: "#ffffff",
              resize: "vertical",
              outline: "none",
              fontFamily: "inherit",
              boxSizing: "border-box",
            }}
            onFocus={(e) => {
              e.currentTarget.style.borderColor = "#3b82f6";
            }}
            onBlur={(e) => {
              e.currentTarget.style.borderColor = "#1e1e2e";
            }}
          />
        </div>

        {/* Meta */}
        <div
          style={{
            borderTop: "1px solid #1e1e2e",
            paddingTop: 16,
            display: "flex",
            flexDirection: "column",
            gap: 6,
          }}
        >
          <div style={{ display: "flex", justifyContent: "space-between" }}>
            <span style={{ fontSize: 11, color: "#6b7280" }}>Gefunden am</span>
            <span style={{ fontSize: 11, color: "#9ca3af" }}>{formatDate(lead.capturedAt)}</span>
          </div>
          {lead.sourceTerm && (
            <div style={{ display: "flex", justifyContent: "space-between" }}>
              <span style={{ fontSize: 11, color: "#6b7280" }}>Suchbegriff</span>
              <span style={{ fontSize: 11, color: "#9ca3af" }}>{lead.sourceTerm}</span>
            </div>
          )}
        </div>
      </div>

      <style>{`
        @keyframes slideInRight {
          from { transform: translateX(100%); opacity: 0; }
          to { transform: translateX(0); opacity: 1; }
        }
      `}</style>
    </>
  );
}