"use client";

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

export default function OpenCodeToolCard({ tool, isExpanded, onToggle, baseUrl, apiKeys, activeProviders, cloudEnabled, initialStatus }) {
  const [status, setStatus] = useState(initialStatus || null);
  const [checking, setChecking] = useState(false);
  const [applying, setApplying] = useState(false);
  const [restoring, setRestoring] = useState(false);
  const [message, setMessage] = useState(null);
  const [showInstallGuide, setShowInstallGuide] = useState(false);
  const [selectedApiKey, setSelectedApiKey] = useState("");
  const [selectedModel, setSelectedModel] = useState("");
  const [subagentModel, setSubagentModel] = useState("");
  const [modalOpen, setModalOpen] = useState(false);
  const [subagentModalOpen, setSubagentModalOpen] = useState(false);
  const [modelAliases, setModelAliases] = useState({});
  const [showManualConfigModal, setShowManualConfigModal] = useState(false);
  const [customBaseUrl, setCustomBaseUrl] = useState("");

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

  useEffect(() => {
    if (initialStatus) setStatus(initialStatus);
  }, [initialStatus]);

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

  // Sync model and subagent model from existing config
  useEffect(() => {
    if (status?.config?.model?.startsWith("9router/")) {
      setSelectedModel(status.config.model.replace("9router/", ""));
    }
    
    // Parse subagent settings from agent.explorer if exists
    if (status?.config?.agent?.explorer?.model?.startsWith("9router/")) {
      setSubagentModel(status.config.agent.explorer.model.replace("9router/", ""));
    }
  }, [status]);

  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);
    }
  };

  const getConfigStatus = () => {
    if (!status?.installed) return null;
    if (!status.config) return "not_configured";
    const url = status.config?.provider?.["9router"]?.options?.baseURL || "";
    const isLocal = url.includes("localhost") || url.includes("127.0.0.1");
    return status.has9Router && (isLocal || url.includes(baseUrl)) ? "configured" : status.has9Router ? "other" : "not_configured";
  };

  const configStatus = getConfigStatus();

  const getEffectiveBaseUrl = () => {
    const url = customBaseUrl || baseUrl;
    return url.endsWith("/v1") ? url : `${url}/v1`;
  };

  const getDisplayUrl = () => customBaseUrl || `${baseUrl}/v1`;

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

  const handleApply = async () => {
    setApplying(true);
    setMessage(null);
    try {
      const keyToUse = (selectedApiKey && selectedApiKey.trim())
        ? selectedApiKey
        : (!cloudEnabled ? "sk_9router" : selectedApiKey);

      const res = await fetch("/api/cli-tools/opencode-settings", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ 
          baseUrl: getEffectiveBaseUrl(), 
          apiKey: keyToUse, 
          model: selectedModel,
          subagentModel: subagentModel || selectedModel
        }),
      });
      const data = await res.json();
      if (res.ok) {
        setMessage({ type: "success", text: "Settings applied successfully!" });
        checkStatus();
      } else {
        setMessage({ type: "error", text: data.error || "Failed to apply settings" });
      }
    } catch (error) {
      setMessage({ type: "error", text: error.message });
    } finally {
      setApplying(false);
    }
  };

  const handleReset = async () => {
    setRestoring(true);
    setMessage(null);
    try {
      const res = await fetch("/api/cli-tools/opencode-settings", { method: "DELETE" });
      const data = await res.json();
      if (res.ok) {
        setMessage({ type: "success", text: "Settings reset successfully!" });
        setSelectedModel("");
        setSubagentModel("");
        checkStatus();
      } else {
        setMessage({ type: "error", text: data.error || "Failed to reset settings" });
      }
    } catch (error) {
      setMessage({ type: "error", text: error.message });
    } finally {
      setRestoring(false);
    }
  };

  const getManualConfigs = () => {
    const keyToUse = (selectedApiKey && selectedApiKey.trim())
      ? selectedApiKey
      : (!cloudEnabled ? "sk_9router" : "<API_KEY_FROM_DASHBOARD>");

    const effectiveSubagentModel = subagentModel || selectedModel;

    return [{
      filename: "~/.config/opencode/opencode.json",
      content: JSON.stringify({
        provider: {
          "9router": {
            npm: "@ai-sdk/openai-compatible",
            options: { baseURL: getEffectiveBaseUrl(), apiKey: keyToUse },
            models: { 
              [selectedModel || "provider/model-id"]: { name: selectedModel || "provider/model-id" },
              [effectiveSubagentModel]: { name: effectiveSubagentModel }
            },
          },
        },
        model: `9router/${selectedModel || "provider/model-id"}`,
        agent: {
          explorer: {
            description: "Fast explorer subagent for codebase exploration",
            mode: "subagent",
            model: `9router/${effectiveSubagentModel}`
          }
        }
      }, null, 2),
    }];
  };

  return (
    <Card padding="xs" 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/opencode.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">
          {checking && (
            <div className="flex items-center gap-2 text-text-muted">
              <span className="material-symbols-outlined animate-spin">progress_activity</span>
              <span>Checking OpenCode CLI...</span>
            </div>
          )}

          {!checking && status && !status.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">OpenCode CLI not installed</p>
                  <p className="text-sm text-text-muted">Please install OpenCode CLI to use auto-apply 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:</p>
                      <code className="block px-3 py-2 bg-black/5 dark:bg-white/5 rounded font-mono text-xs">npm install -g opencode-ai</code>
                    </div>
                    <p className="text-text-muted">After installation, run <code className="px-1 bg-black/5 dark:bg-white/5 rounded">opencode</code> to verify.</p>
                  </div>
                </div>
              )}
            </div>
          )}

          {!checking && status?.installed && (
            <>
              <div className="flex flex-col gap-2">
                {/* Current base URL */}
                {status?.config?.provider?.["9router"]?.options?.baseURL && (
                  <div className="flex items-center gap-2">
                    <span className="w-32 shrink-0 text-sm font-semibold text-text-main text-right">Current</span>
                    <span className="material-symbols-outlined text-text-muted text-[14px]">arrow_forward</span>
                    <span className="flex-1 px-2 py-1.5 text-xs text-text-muted truncate">
                      {status.config.provider["9router"].options.baseURL}
                    </span>
                  </div>
                )}

                {/* 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={getDisplayUrl()}
                    onChange={(e) => setCustomBaseUrl(e.target.value)}
                    placeholder="https://.../v1"
                    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}/v1` && (
                    <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 */}
                <div className="flex items-center gap-2">
                  <span className="w-32 shrink-0 text-sm font-semibold text-text-main text-right">Model</span>
                  <span className="material-symbols-outlined text-text-muted text-[14px]">arrow_forward</span>
                  <input type="text" value={selectedModel} onChange={(e) => setSelectedModel(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={() => setModalOpen(true)} disabled={!activeProviders?.length} className={`px-2 py-1.5 rounded border text-xs transition-colors shrink-0 whitespace-nowrap ${activeProviders?.length ? "bg-surface border-border text-text-main hover:border-primary cursor-pointer" : "opacity-50 cursor-not-allowed border-border"}`}>Select Model</button>
                  {selectedModel && <button onClick={() => setSelectedModel("")} 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>

                {/* Subagent Model */}
                <div className="flex items-center gap-2">
                  <span className="w-32 shrink-0 text-sm font-semibold text-text-main text-right">Subagent Model</span>
                  <span className="material-symbols-outlined text-text-muted text-[14px]">arrow_forward</span>
                  <input 
                    type="text" 
                    value={subagentModel} 
                    onChange={(e) => setSubagentModel(e.target.value)} 
                    placeholder={selectedModel || "provider/model-id (defaults to main model)"} 
                    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={() => setSubagentModalOpen(true)} 
                    disabled={!activeProviders?.length} 
                    className={`px-2 py-1.5 rounded border text-xs transition-colors shrink-0 whitespace-nowrap ${activeProviders?.length ? "bg-surface border-border text-text-main hover:border-primary cursor-pointer" : "opacity-50 cursor-not-allowed border-border"}`}
                  >
                    Select Model
                  </button>
                  {subagentModel && (
                    <button 
                      onClick={() => setSubagentModel("")} 
                      className="p-1 text-text-muted hover:text-red-500 rounded transition-colors" 
                      title="Clear (will use main model)"
                    >
                      <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={handleApply} disabled={!selectedModel} loading={applying}>
                  <span className="material-symbols-outlined text-[14px] mr-1">save</span>Apply
                </Button>
                <Button variant="outline" size="sm" onClick={handleReset} disabled={!status.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={(model) => { 
          setSelectedModel(model.value); 
          // Auto-set subagent model if not set
          if (!subagentModel) {
            setSubagentModel(model.value);
          }
          setModalOpen(false); 
        }}
        selectedModel={selectedModel}
        activeProviders={activeProviders}
        modelAliases={modelAliases}
        title="Select Model for OpenCode"
      />

      <ModelSelectModal
        isOpen={subagentModalOpen}
        onClose={() => setSubagentModalOpen(false)}
        onSelect={(model) => { setSubagentModel(model.value); setSubagentModalOpen(false); }}
        selectedModel={subagentModel}
        activeProviders={activeProviders}
        modelAliases={modelAliases}
        title="Select Subagent Model for OpenCode"
      />

      <ManualConfigModal
        isOpen={showManualConfigModal}
        onClose={() => setShowManualConfigModal(false)}
        title="OpenCode - Manual Configuration"
        configs={getManualConfigs()}
      />
    </Card>
  );
}