"use client";

import { useState, useEffect, useRef } from "react";
import { Card, Button, ModelSelectModal, ManualConfigModal } from "@/shared/components";
import Image from "next/image";

const CLOUD_URL = process.env.NEXT_PUBLIC_CLOUD_URL;

export default function ClaudeToolCard({
  tool,
  isExpanded,
  onToggle,
  activeProviders,
  modelMappings,
  onModelMappingChange,
  baseUrl,
  hasActiveProviders,
  apiKeys,
  cloudEnabled,
}) {
  const [claudeStatus, setClaudeStatus] = useState(null);
  const [checkingClaude, setCheckingClaude] = useState(false);
  const [applying, setApplying] = useState(false);
  const [restoring, setRestoring] = useState(false);
  const [message, setMessage] = useState(null);
  const [showInstallGuide, setShowInstallGuide] = useState(false);
  const [modalOpen, setModalOpen] = useState(false);
  const [currentEditingAlias, setCurrentEditingAlias] = useState(null);
  const [selectedApiKey, setSelectedApiKey] = useState("");
  const [modelAliases, setModelAliases] = useState({});
  const [showManualConfigModal, setShowManualConfigModal] = useState(false);
  const [customBaseUrl, setCustomBaseUrl] = useState("");
  const hasInitializedModels = useRef(false);

  const getConfigStatus = () => {
    if (!claudeStatus?.installed) return null;
    const currentUrl = claudeStatus.settings?.env?.ANTHROPIC_BASE_URL;
    if (!currentUrl) return "not_configured";
    const localMatch = currentUrl.includes("localhost") || currentUrl.includes("127.0.0.1");
    const cloudMatch = cloudEnabled && CLOUD_URL && currentUrl.startsWith(CLOUD_URL);
    if (localMatch || cloudMatch) return "configured";
    return "other";
  };

  const configStatus = getConfigStatus();

  useEffect(() => {
    if (apiKeys?.length > 0 && !selectedApiKey) {
      setSelectedApiKey(apiKeys[0].key);
    }
  }, [apiKeys, selectedApiKey]);

  useEffect(() => {
    if (isExpanded && !claudeStatus) {
      checkClaudeStatus();
      fetchModelAliases();
    }
  }, [isExpanded, claudeStatus]);

  const fetchModelAliases = async () => {
    try {
      const res = await fetch("/api/models/alias");
      const data = await res.json();
      if (res.ok) setModelAliases(data.aliases || {});
    } catch (error) {
      console.log("Error fetching model aliases:", error);
    }
  };

  useEffect(() => {
    if (claudeStatus?.installed && !hasInitializedModels.current) {
      hasInitializedModels.current = true;
      const env = claudeStatus.settings?.env || {};
      
      tool.defaultModels.forEach((model) => {
        if (model.envKey) {
          const value = env[model.envKey] || model.defaultValue || "";
          // Only sync initial values from file once
          if (value) {
            onModelMappingChange(model.alias, value);
          }
        }
      });
      // Only set selectedApiKey if it exists in apiKeys list
      const tokenFromFile = env.ANTHROPIC_AUTH_TOKEN;
      if (tokenFromFile && apiKeys?.some(k => k.key === tokenFromFile)) {
        setSelectedApiKey(tokenFromFile);
      }
    }
  }, [claudeStatus, apiKeys, tool.defaultModels, onModelMappingChange]);

  const checkClaudeStatus = async () => {
    setCheckingClaude(true);
    try {
      const res = await fetch("/api/cli-tools/claude-settings");
      const data = await res.json();
      setClaudeStatus(data);
    } catch (error) {
      setClaudeStatus({ installed: false, error: error.message });
    } finally {
      setCheckingClaude(false);
    }
  };

  const getEffectiveBaseUrl = () => customBaseUrl || baseUrl;

  const handleApplySettings = async () => {
    setApplying(true);
    setMessage(null);
    try {
      const env = { ANTHROPIC_BASE_URL: getEffectiveBaseUrl() };
      
      // Get key from dropdown, fallback to first key or sk_9router for localhost
      const keyToUse = selectedApiKey?.trim() 
        || (apiKeys?.length > 0 ? apiKeys[0].key : null)
        || (!cloudEnabled ? "sk_9router" : null);
      
      if (keyToUse) {
        env.ANTHROPIC_AUTH_TOKEN = keyToUse;
      }
      
      tool.defaultModels.forEach((model) => {
        const targetModel = modelMappings[model.alias];
        if (targetModel && model.envKey) env[model.envKey] = targetModel;
      });
      const res = await fetch("/api/cli-tools/claude-settings", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ env }),
      });
      const data = await res.json();
      if (res.ok) {
        setMessage({ type: "success", text: "Settings applied successfully!" });
        setClaudeStatus(prev => ({ ...prev, hasBackup: true, settings: { ...prev?.settings, env } }));
      } else {
        setMessage({ type: "error", text: data.error || "Failed to apply settings" });
      }
    } catch (error) {
      setMessage({ type: "error", text: error.message });
    } finally {
      setApplying(false);
    }
  };

  const handleResetSettings = async () => {
    setRestoring(true);
    setMessage(null);
    try {
      const res = await fetch("/api/cli-tools/claude-settings", { method: "DELETE" });
      const data = await res.json();
      if (res.ok) {
        setMessage({ type: "success", text: "Settings reset successfully!" });
        tool.defaultModels.forEach((model) => onModelMappingChange(model.alias, model.defaultValue || ""));
        setSelectedApiKey("");
      } else {
        setMessage({ type: "error", text: data.error || "Failed to reset settings" });
      }
    } catch (error) {
      setMessage({ type: "error", text: error.message });
    } finally {
      setRestoring(false);
    }
  };

  const openModelSelector = (alias) => {
    setCurrentEditingAlias(alias);
    setModalOpen(true);
  };

  const handleModelSelect = (model) => {
    if (currentEditingAlias) onModelMappingChange(currentEditingAlias, model.value);
  };

  // Generate settings.json content for manual copy
  const getManualConfigs = () => {
    const keyToUse = (selectedApiKey && selectedApiKey.trim()) 
      ? selectedApiKey 
      : (!cloudEnabled ? "sk_9router" : "<API_KEY_FROM_DASHBOARD>");
    const env = { ANTHROPIC_BASE_URL: getEffectiveBaseUrl(), ANTHROPIC_AUTH_TOKEN: keyToUse };
    tool.defaultModels.forEach((model) => {
      const targetModel = modelMappings[model.alias];
      if (targetModel && model.envKey) env[model.envKey] = targetModel;
    });
    
    return [
      {
        filename: "~/.claude/settings.json",
        content: JSON.stringify({ env }, null, 2),
      },
    ];
  };

  return (
    <Card padding="sm" className="overflow-hidden">
      <div className="flex items-center justify-between hover:cursor-pointer" onClick={onToggle}>
        <div className="flex items-center gap-3">
          <div className="size-8 flex items-center justify-center shrink-0">
            <Image src="/providers/claude.png" alt={tool.name} width={32} height={32} className="size-8 object-contain rounded-lg" sizes="32px" onError={(e) => { e.target.style.display = "none"; }} />
          </div>
          <div className="min-w-0">
            <div className="flex items-center gap-2">
              <h3 className="font-medium text-sm">{tool.name}</h3>
              {configStatus === "configured" && <span className="px-1.5 py-0.5 text-[10px] font-medium bg-green-500/10 text-green-600 dark:text-green-400 rounded-full">Connected</span>}
              {configStatus === "not_configured" && <span className="px-1.5 py-0.5 text-[10px] font-medium bg-yellow-500/10 text-yellow-600 dark:text-yellow-400 rounded-full">Not configured</span>}
              {configStatus === "other" && <span className="px-1.5 py-0.5 text-[10px] font-medium bg-blue-500/10 text-blue-600 dark:text-blue-400 rounded-full">Other</span>}
            </div>
            <p className="text-xs text-text-muted truncate">{tool.description}</p>
          </div>
        </div>
        <span className={`material-symbols-outlined text-text-muted text-[20px] transition-transform ${isExpanded ? "rotate-180" : ""}`}>expand_more</span>
      </div>

      {isExpanded && (
        <div className="mt-4 pt-4 border-t border-border flex flex-col gap-4">
          {checkingClaude && (
            <div className="flex items-center gap-2 text-text-muted">
              <span className="material-symbols-outlined animate-spin">progress_activity</span>
              <span>Checking Claude CLI...</span>
            </div>
          )}

          {!checkingClaude && claudeStatus && !claudeStatus.installed && (
            <div className="flex flex-col gap-4">
              <div className="flex items-center gap-3 p-4 bg-yellow-500/10 border border-yellow-500/30 rounded-lg">
                <span className="material-symbols-outlined text-yellow-500">warning</span>
                <div className="flex-1">
                  <p className="font-medium text-yellow-600 dark:text-yellow-400">Claude CLI not installed</p>
                  <p className="text-sm text-text-muted">Please install Claude CLI to use this feature.</p>
                </div>
                <Button variant="outline" size="sm" onClick={() => setShowInstallGuide(!showInstallGuide)}>
                  <span className="material-symbols-outlined text-[18px] mr-1">{showInstallGuide ? "expand_less" : "help"}</span>
                  {showInstallGuide ? "Hide" : "How to Install"}
                </Button>
              </div>
              {showInstallGuide && (
                <div className="p-4 bg-surface border border-border rounded-lg">
                  <h4 className="font-medium mb-3">Installation Guide</h4>
                  <div className="space-y-3 text-sm">
                    <div>
                      <p className="text-text-muted mb-1">macOS / Linux / Windows:</p>
                      <code className="block px-3 py-2 bg-black/5 dark:bg-white/5 rounded font-mono text-xs">npm install -g @anthropic-ai/claude-code</code>
                    </div>
                    <p className="text-text-muted">After installation, run <code className="px-1 bg-black/5 dark:bg-white/5 rounded">claude</code> to verify.</p>
                  </div>
                </div>
              )}
            </div>
          )}

          {!checkingClaude && claudeStatus?.installed && (
            <>
              <div className="flex flex-col gap-2">
                {/* Base URL */}
                <div className="flex items-center gap-2">
                  <span className="w-32 shrink-0 text-sm font-semibold text-text-main text-right">Base URL</span>
                  <span className="material-symbols-outlined text-text-muted text-[14px]">arrow_forward</span>
                  <input 
                    type="text" 
                    value={customBaseUrl || baseUrl} 
                    onChange={(e) => setCustomBaseUrl(e.target.value)} 
                    placeholder="https://..." 
                    className="flex-1 px-2 py-1.5 bg-surface rounded border border-border text-xs focus:outline-none focus:ring-1 focus:ring-primary/50" 
                  />
                  {customBaseUrl && customBaseUrl !== baseUrl && (
                    <button onClick={() => setCustomBaseUrl("")} className="p-1 text-text-muted hover:text-primary rounded transition-colors" title="Reset to default">
                      <span className="material-symbols-outlined text-[14px]">restart_alt</span>
                    </button>
                  )}
                </div>

                {/* API Key */}
                <div className="flex items-center gap-2">
                  <span className="w-32 shrink-0 text-sm font-semibold text-text-main text-right">API Key</span>
                  <span className="material-symbols-outlined text-text-muted text-[14px]">arrow_forward</span>
                  {apiKeys.length > 0 ? (
                    <select value={selectedApiKey} onChange={(e) => setSelectedApiKey(e.target.value)} className="flex-1 px-2 py-1.5 bg-surface rounded text-xs border border-border focus:outline-none focus:ring-1 focus:ring-primary/50">
                      {apiKeys.map((key) => <option key={key.id} value={key.key}>{key.key}</option>)}
                    </select>
                  ) : (
                    <span className="flex-1 text-xs text-text-muted px-2 py-1.5">
                      {cloudEnabled ? "No API keys - Create one in Keys page" : "sk_9router (default)"}
                    </span>
                  )}
                </div>

                {/* Model Mappings */}
                {tool.defaultModels.map((model) => (
                  <div key={model.alias} className="flex items-center gap-2">
                    <span className="w-32 shrink-0 text-sm font-semibold text-text-main text-right">{model.name}</span>
                    <span className="material-symbols-outlined text-text-muted text-[14px]">arrow_forward</span>
                    <input type="text" value={modelMappings[model.alias] || ""} onChange={(e) => onModelMappingChange(model.alias, e.target.value)} placeholder="provider/model-id" className="flex-1 px-2 py-1.5 bg-surface rounded border border-border text-xs focus:outline-none focus:ring-1 focus:ring-primary/50" />
                    <button onClick={() => openModelSelector(model.alias)} disabled={!hasActiveProviders} className={`px-2 py-1.5 rounded border text-xs transition-colors shrink-0 whitespace-nowrap ${hasActiveProviders ? "bg-surface border-border text-text-main hover:border-primary cursor-pointer" : "opacity-50 cursor-not-allowed border-border"}`}>Select Model</button>
                    {modelMappings[model.alias] && <button onClick={() => onModelMappingChange(model.alias, "")} className="p-1 text-text-muted hover:text-red-500 rounded transition-colors" title="Clear"><span className="material-symbols-outlined text-[14px]">close</span></button>}
                  </div>
                ))}
              </div>

              {message && (
                <div className={`flex items-center gap-2 px-2 py-1.5 rounded text-xs ${message.type === "success" ? "bg-green-500/10 text-green-600" : "bg-red-500/10 text-red-600"}`}>
                  <span className="material-symbols-outlined text-[14px]">{message.type === "success" ? "check_circle" : "error"}</span>
                  <span>{message.text}</span>
                </div>
              )}

              <div className="flex items-center gap-2">
                <Button variant="primary" size="sm" onClick={handleApplySettings} disabled={!hasActiveProviders} loading={applying}>
                  <span className="material-symbols-outlined text-[14px] mr-1">save</span>Apply
                </Button>
                <Button variant="outline" size="sm" onClick={handleResetSettings} disabled={!claudeStatus?.has9Router} loading={restoring}>
                  <span className="material-symbols-outlined text-[14px] mr-1">restore</span>Reset
                </Button>
                <Button variant="ghost" size="sm" onClick={() => setShowManualConfigModal(true)}>
                  <span className="material-symbols-outlined text-[14px] mr-1">content_copy</span>Manual Config
                </Button>
              </div>
            </>
          )}
        </div>
      )}

      <ModelSelectModal isOpen={modalOpen} onClose={() => setModalOpen(false)} onSelect={handleModelSelect} selectedModel={currentEditingAlias ? modelMappings[currentEditingAlias] : null} activeProviders={activeProviders} modelAliases={modelAliases} title={`Select model for ${currentEditingAlias}`} />
      
      <ManualConfigModal
        isOpen={showManualConfigModal}
        onClose={() => setShowManualConfigModal(false)}
        title="Claude CLI - Manual Configuration"
        configs={getManualConfigs()}
      />
    </Card>
  );
}