"use client";

// Avatar editor modal for a claw: upload an image, preview it, then Save
// (downscaled to 256² and persisted via PATCH /api/claws/{id}).
//
// Prompt-based generation was removed with the rest of the Gemini dependency:
// it called Gemini's image model, and no provider we use can generate images
// (Claude and Kimi are text-only; z.ai returns "Unknown Model" for cogview on
// our plan). Upload is untouched — it never needed a provider. Re-add a
// generate path here if an image provider is ever wired.

import { useEffect, useRef, useState } from "react";
import { Camera, Upload, X } from "lucide-react";

const mono = "'JetBrains Mono', ui-monospace, monospace";

// Cover-fit to a square and re-encode small so avatars stay lightweight.
function downscale(dataUrl: string, size = 256): Promise<string> {
  return new Promise((resolve) => {
    const img = new Image();
    img.onload = () => {
      const c = document.createElement("canvas");
      c.width = size;
      c.height = size;
      const ctx = c.getContext("2d");
      if (!ctx) { resolve(dataUrl); return; }
      const scale = Math.max(size / img.width, size / img.height);
      const w = img.width * scale;
      const h = img.height * scale;
      ctx.drawImage(img, (size - w) / 2, (size - h) / 2, w, h);
      resolve(c.toDataURL("image/jpeg", 0.85));
    };
    img.onerror = () => resolve(dataUrl);
    img.src = dataUrl;
  });
}

export function AvatarModal({ clawId, clawName, current, onClose, onSaved }: { clawId: string; clawName: string; current?: string | null; onClose: () => void; onSaved: (dataUrl: string) => void }) {
  const [preview, setPreview] = useState<string | null>(current ?? null);
  const [busy, setBusy] = useState<null | "save">(null);
  const [error, setError] = useState<string | null>(null);
  const fileRef = useRef<HTMLInputElement>(null);

  useEffect(() => {
    const onKey = (e: KeyboardEvent) => { if (e.key === "Escape") onClose(); };
    window.addEventListener("keydown", onKey);
    return () => window.removeEventListener("keydown", onKey);
  }, [onClose]);

  function onPick(e: React.ChangeEvent<HTMLInputElement>) {
    const file = e.target.files?.[0];
    if (!file) return;
    const reader = new FileReader();
    reader.onload = () => { setPreview(String(reader.result)); setError(null); };
    reader.readAsDataURL(file);
  }


  async function save() {
    if (!preview || busy) return;
    setBusy("save");
    setError(null);
    try {
      const small = await downscale(preview);
      const res = await fetch(`/api/claws/${clawId}`, { method: "PATCH", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ avatar: small }) });
      if (!res.ok) { setError("could not save image"); setBusy(null); return; }
      onSaved(small);
      onClose();
    } catch {
      setError("could not save image");
      setBusy(null);
    }
  }


  return (
    <div onClick={onClose} role="presentation" style={{ position: "fixed", inset: 0, zIndex: 110, background: "rgba(0,0,0,.62)", backdropFilter: "blur(4px)", display: "flex", alignItems: "center", justifyContent: "center", padding: 24, animation: "cm-fade .18s ease" }}>
      <div onClick={(e) => e.stopPropagation()} role="dialog" aria-modal="true" aria-label="Agent image" style={{ width: "100%", maxWidth: 460, borderRadius: 16, background: "#0d0d10", border: "1px solid rgba(255,255,255,.1)", boxShadow: "0 30px 90px rgba(0,0,0,.6)", padding: 22, animation: "scale-in .18s ease" }}>
        <div style={{ display: "flex", alignItems: "flex-start", gap: 12, marginBottom: 16 }}>
          <div style={{ flex: 1 }}>
            <div style={{ fontSize: 18, fontWeight: 700, color: "#f3f3f5" }}>{clawName}&apos;s image</div>
            <div style={{ fontSize: 12.5, color: "#8a8a92", marginTop: 2 }}>Upload a PNG or JPG.</div>
          </div>
          <button type="button" onClick={onClose} aria-label="Close" style={{ width: 30, height: 30, flex: "none", borderRadius: 8, border: "1px solid rgba(255,255,255,.12)", background: "transparent", color: "#9a9aa2", cursor: "pointer", display: "flex", alignItems: "center", justifyContent: "center" }}><X size={15} /></button>
        </div>

        <div style={{ display: "flex", gap: 16, marginBottom: 16 }}>
          <div style={{ width: 120, height: 120, flex: "none", borderRadius: 16, overflow: "hidden", border: "1px solid rgba(255,255,255,.1)", background: preview ? `center/cover no-repeat url(${preview})` : "#101014", display: "flex", alignItems: "center", justifyContent: "center", color: "#3a3a40" }}>
            {preview ? null : <Camera size={26} />}
          </div>
          <div style={{ flex: 1, display: "flex", flexDirection: "column", justifyContent: "center", gap: 8 }}>
            <button type="button" onClick={() => fileRef.current?.click()} style={{ display: "inline-flex", alignItems: "center", gap: 7, justifyContent: "center", padding: "8px 10px", borderRadius: 9, border: "1px solid rgba(255,255,255,.14)", background: "transparent", color: "#dcdce2", fontSize: 12.5, cursor: "pointer" }}><Upload size={14} /> Upload image</button>
            <input ref={fileRef} type="file" accept="image/*" onChange={onPick} style={{ display: "none" }} />
            <span style={{ fontFamily: mono, fontSize: 9, color: "#5a5a62" }}>PNG/JPG · saved at 256×256</span>
          </div>
        </div>


        {error ? <div role="alert" style={{ marginTop: 12, fontFamily: mono, fontSize: 10.5, color: "#ff8a7a" }}>{error}</div> : null}

        <div style={{ display: "flex", gap: 8, marginTop: 16 }}>
          <button type="button" onClick={onClose} style={{ flex: 1, padding: "9px 0", borderRadius: 9, border: "1px solid rgba(255,255,255,.12)", background: "transparent", color: "#cfcfd5", fontSize: 13, cursor: "pointer" }}>Cancel</button>
          <button type="button" onClick={save} disabled={!preview || busy !== null} style={{ flex: 1, padding: "9px 0", borderRadius: 9, border: 0, background: !preview || busy ? "rgba(255,111,97,.4)" : "#ff6f61", color: "#2a0d0a", fontSize: 13, fontWeight: 700, cursor: !preview || busy ? "default" : "pointer" }}>{busy === "save" ? "Saving…" : "Save image"}</button>
        </div>
      </div>
    </div>
  );
}