import { Action, ActionPanel, Icon, List, openExtensionPreferences } from "@vicinae/api";
import { useCallback, useEffect, useMemo, useState } from "react";
import { describeResumeTimeout, getLamPreferences, needsSetup } from "./lib/preferences";
import { listModels } from "./lib/ollama";
import { forgetGeoPlace } from "./lib/geo";
import { forgetVisionSupport, visionSupport, type VisionSupport } from "./lib/vision";
import type { ModelInfo } from "./lib/types";
import { errorMessage } from "./lib/utils";

/**
 * Setup and diagnostics.
 *
 * Two things are worth understanding about how configuration works here.
 *
 * First, Vicinae asks for `required` preferences with no default *before* the
 * command starts. The API key and the model are both declared that way in the
 * manifest, so the two-step "key, then model" onboarding happens on the very
 * first launch without any code in this file.
 *
 * Second, an extension can read preferences but cannot write them: there is no
 * `setPreferenceValues`. So this command does not save anything. It verifies
 * the connection, lists the models the key can actually reach, and hands the
 * exact model name to the clipboard so it can be pasted into settings. That is
 * more useful than a form that silently fights the launcher's own settings UI,
 * and it means the model list can never drift out of sync with the real one.
 */

/** Shows enough of a key to recognise it without printing the whole thing. */
function maskKey(apiKey: string): string {
  if (apiKey.length === 0) return "Not set";
  if (apiKey.length <= 8) return "•".repeat(apiKey.length);
  return `${apiKey.slice(0, 4)}${"•".repeat(6)}${apiKey.slice(-4)}`;
}

export default function SetupCommand() {
  const preferences = useMemo(() => getLamPreferences(), []);
  const [models, setModels] = useState<ModelInfo[]>([]);
  const [error, setError] = useState<string | undefined>(undefined);
  const [isLoading, setIsLoading] = useState(false);
  const [hasTested, setHasTested] = useState(false);
  const [vision, setVision] = useState<VisionSupport>("unknown");

  const missingKey = needsSetup(preferences);

  const testConnection = useCallback(async () => {
    setIsLoading(true);
    setError(undefined);

    try {
      const result = await listModels({ host: preferences.host, apiKey: preferences.apiKey });
      setModels(result);
    } catch (thrown) {
      setModels([]);
      setError(errorMessage(thrown));
    } finally {
      setHasTested(true);
      setIsLoading(false);
    }

    // A model can gain or lose image support without its name changing (a
    // re-pull, a retagged build), so re-testing drops the cached answer that the
    // chat view gates the snip action on rather than leaving a stale "no".
    await forgetVisionSupport();

    // Same reasoning for the IP-derived place: a re-test is the moment to stop
    // trusting an answer that was resolved hours ago, possibly in another city.
    await forgetGeoPlace();
    setVision(
      await visionSupport({
        host: preferences.host,
        apiKey: preferences.apiKey,
        model: preferences.model,
        refresh: true,
      }),
    );
  }, [preferences]);

  // Verifying on open means the user sees something real immediately rather
  // than having to guess whether their key works.
  useEffect(() => {
    if (!missingKey) void testConnection();
  }, [missingKey, testConnection]);

  const openPreferences = useCallback(() => {
    void openExtensionPreferences();
  }, []);

  const settingsActions = (
    <ActionPanel>
      <Action title="Open Extension Preferences" icon={Icon.BulletPoints} onAction={openPreferences} />
      <Action
        title="Test Connection"
        icon={Icon.ArrowClockwise}
        onAction={() => void testConnection()}
      />
    </ActionPanel>
  );

  const statusText = (() => {
    if (missingKey) return "No API key yet";
    if (isLoading) return "Checking…";
    if (error) return "Connection failed";
    if (hasTested) return `Connected · ${models.length} models`;
    return "Not checked";
  })();

  const statusIcon = error || missingKey ? Icon.QuestionMarkCircle : Icon.SpeechBubble;

  return (
    <List
      isLoading={isLoading}
      navigationTitle="Lam Agent Setup"
      searchBarPlaceholder="Search models…"
      actions={settingsActions}
    >
      <List.Section title="Configuration">
        <List.Item
          icon={statusIcon}
          title="Status"
          subtitle={statusText}
          actions={settingsActions}
          accessories={error ? [{ tag: "Action needed" }] : []}
        />
        <List.Item
          icon={Icon.Person}
          title="Ollama Host"
          subtitle={preferences.host}
          actions={settingsActions}
        />
        <List.Item
          icon={Icon.Person}
          title="API Key"
          subtitle={maskKey(preferences.apiKey)}
          actions={settingsActions}
        />
        <List.Item
          icon={Icon.Stars}
          title="Model"
          subtitle={preferences.model}
          actions={settingsActions}
        />
        <List.Item
          icon={Icon.BulletPoints}
          title="Web Tools"
          subtitle={preferences.webEnabled ? "Enabled" : "Disabled"}
          actions={settingsActions}
        />
        <List.Item
          icon={Icon.Clock}
          title="Reasoning Effort"
          subtitle={preferences.think ?? "Off"}
          actions={settingsActions}
        />
        <List.Item
          icon={Icon.BulletPoints}
          title="Show Tool Calls"
          subtitle={preferences.showToolCalls ? "Shown" : "Hidden"}
          actions={settingsActions}
        />
        <List.Item
          icon={Icon.SpeechBubble}
          title="Show Reasoning"
          subtitle={preferences.showReasoning ? "Shown" : "Hidden"}
          actions={settingsActions}
        />
        <List.Item
          icon={Icon.ArrowClockwise}
          title="Start New Chat After"
          subtitle={describeResumeTimeout(preferences.resumeTimeoutMs)}
          actions={settingsActions}
        />
        <List.Item
          icon={vision === "yes" ? Icon.Image : Icon.QuestionMarkCircle}
          title="Image Input"
          subtitle={
            vision === "yes"
              ? `Supported by ${preferences.model}. Snip commands are available.`
              : vision === "no"
                ? `${preferences.model} cannot see images. Pick a vision model to snip.`
                : "Not checked yet"
          }
          actions={settingsActions}
        />
        <List.Item
          icon={preferences.place || preferences.ipGeolocation ? Icon.Person : Icon.QuestionMarkCircle}
          title="Location"
          subtitle={
            preferences.place
              ? `${preferences.place} (from preferences)`
              : preferences.ipGeolocation
                ? "Rough area, resolved from the IP address via ipwho.is"
                : "Region only, from the timezone and locale"
          }
          actions={settingsActions}
        />
      </List.Section>

      {error ? (
        <List.Section title="Last Error">
          <List.Item
            icon={Icon.QuestionMarkCircle}
            title={error}
            subtitle="Check the API key, then run Test Connection again"
            actions={settingsActions}
          />
        </List.Section>
      ) : null}

      {missingKey ? (
        <List.Section title="Next Step">
          <List.Item
            icon={Icon.QuestionMarkCircle}
            title="Add your Ollama API key"
            subtitle="Create one at ollama.com/settings/keys, then paste it into the extension preferences"
            actions={
              <ActionPanel>
                <Action title="Open Extension Preferences" icon={Icon.BulletPoints} onAction={openPreferences} />
                <Action.OpenInBrowser title="Create an API Key" url="https://ollama.com/settings/keys" />
              </ActionPanel>
            }
          />
        </List.Section>
      ) : null}

      {models.length > 0 ? (
        <List.Section title="Available Models" subtitle={`${models.length} reachable with this key`}>
          {models.map((model) => (
            <List.Item
              key={model.name}
              id={model.name}
              icon={Icon.Stars}
              title={model.name}
              subtitle={model.name === preferences.model ? "Currently selected" : undefined}
              accessories={model.parameterSize ? [{ tag: model.parameterSize }] : []}
              actions={
                <ActionPanel>
                  <Action.CopyToClipboard title="Copy Model Name" content={model.name} />
                  <Action title="Open Extension Preferences" icon={Icon.BulletPoints} onAction={openPreferences} />
                </ActionPanel>
              }
            />
          ))}
        </List.Section>
      ) : null}
    </List>
  );
}