"use client";

import { useState, useEffect, useCallback } from "react";
import BackToMC from "@/components/mission-control/BackToMC";

interface Skill {
  slug: string;
  name: string;
  score: number;
  category?: string;
  description?: string;
  triggers?: string;
}

const AGENTS = ["horus", "amun", "cleo"] as const;
const AGENT_LABELS: Record<string, string> = {
  horus: "🦅 Horus (Local)",
  amun: "🤖 Amun",
  cleo: "👑 Cleo",
};

const CATEGORIES = [
  { id: "productivity", name: "⚡ Productivity", icon: "⚡" },
  { id: "automation", name: "🤖 Automation", icon: "🤖" },
  { id: "ai", name: "🧠 AI", icon: "🧠" },
  { id: "writing", name: "✍️ Writing", icon: "✍️" },
  { id: "research", name: "🔬 Research", icon: "🔬" },
  { id: "coding", name: "💻 Coding", icon: "💻" },
  { id: "business", name: "💼 Business", icon: "💼" },
];

const CATEGORY_QUERIES: Record<string, string> = {
  productivity: "productivity focus work",
  automation: "automation workflow",
  ai: "artificial intelligence machine learning",
  writing: "writing content copy",
  research: "research data analysis",
  coding: "code programming developer",
  business: "business sales marketing",
};

export default function ClawHubMarketplace() {
  const [skills, setSkills] = useState<Skill[]>([]);
  const [categorySkills, setCategorySkills] = useState<Record<string, Skill[]>>({});
  const [search, setSearch] = useState("");
  const [loading, setLoading] = useState(false);
  const [selectedSkill, setSelectedSkill] = useState<Skill | null>(null);
  const [skillDetails, setSkillDetails] = useState<{description?: string; triggers?: string} | null>(null);
  const [selectedAgents, setSelectedAgents] = useState<string[]>(["horus"]);
  const [view, setView] = useState<"popular" | "categories" | "search">("popular");
  const [categoryView, setCategoryView] = useState<string | null>(null);
  const [action, setAction] = useState<"install" | "delete" | "sync" | "push" | null>(null);
  const [output, setOutput] = useState("");
  const [installedSkills, setInstalledSkills] = useState<Record<string, string[]>>({});
  const [syncing, setSyncing] = useState(false);
  const [selectedCategory, setSelectedCategory] = useState<string | null>(null);

  const fetchInstalled = useCallback(async () => {
    try {
      const res = await fetch("/api/clawhub?action=list");
      const data = await res.json();
      setInstalledSkills(data.installed || {});
    } catch (e) {
      console.error(e);
    }
  }, []);

  const searchSkills = useCallback(async (query: string) => {
    setLoading(true);
    try {
      const res = await fetch(`/api/clawhub?action=search&q=${encodeURIComponent(query)}`);
      const data = await res.json();
      setSkills(data.skills || []);
    } catch (e) {
      console.error(e);
    }
    setLoading(false);
  }, []);

  const fetchAllCategories = useCallback(async () => {
    setLoading(true);
    const results: Record<string, Skill[]> = {};
    
    for (const cat of CATEGORIES) {
      try {
        const res = await fetch(`/api/clawhub?action=search&q=${encodeURIComponent(CATEGORY_QUERIES[cat.id])}`);
        const data = await res.json();
        results[cat.id] = (data.skills || []).slice(0, 5); // Top 5 per category
      } catch (e) {
        results[cat.id] = [];
      }
    }
    
    setCategorySkills(results);
    setLoading(false);
  }, []);

  const refreshPopular = useCallback(async () => {
    setLoading(true);
    setView("popular");
    // Get top skills from all categories combined
    const allSkills: Skill[] = [];
    const seen = new Set<string>();
    
    for (const cat of CATEGORIES) {
      try {
        const res = await fetch(`/api/clawhub?action=search&q=${encodeURIComponent(CATEGORY_QUERIES[cat.id])}`);
        const data = await res.json();
        for (const skill of data.skills || []) {
          if (!seen.has(skill.slug)) {
            seen.add(skill.slug);
            allSkills.push({ ...skill, category: cat.id });
          }
        }
      } catch {}
    }
    
    // Sort by score and take top 30
    allSkills.sort((a, b) => b.score - a.score);
    setSkills(allSkills.slice(0, 30));
    setLoading(false);
  }, []);

  useEffect(() => {
    if (view === "popular") {
      refreshPopular();
    } else if (view === "categories") {
      fetchAllCategories();
    }
    fetchInstalled();
  }, [view, refreshPopular, fetchAllCategories, fetchInstalled]);

  const toggleAgent = (agent: string) => {
    setSelectedAgents((prev) =>
      prev.includes(agent) ? prev.filter((a) => a !== agent) : [...prev, agent]
    );
  };

  const selectAll = () => setSelectedAgents([...AGENTS]);

  const handleInstall = async () => {
    if (!selectedSkill || selectedAgents.length === 0) return;
    setAction("install");
    setOutput("Installing...\n");
    try {
      const res = await fetch("/api/clawhub", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          action: "install",
          slug: selectedSkill.slug,
          agents: selectedAgents,
        }),
      });
      const data = await res.json();
      setOutput(data.output || data.error || "Done");
      fetchInstalled();
    } catch (e) {
      setOutput("Error: " + String(e));
    }
    setAction(null);
  };

  const handleDelete = async () => {
    if (!selectedSkill || selectedAgents.length === 0) return;
    setAction("delete");
    setOutput("Removing...\n");
    try {
      const res = await fetch("/api/clawhub", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          action: "delete",
          slug: selectedSkill.slug,
          agents: selectedAgents,
        }),
      });
      const data = await res.json();
      setOutput(data.output || data.error || "Done");
      fetchInstalled();
    } catch (e) {
      setOutput("Error: " + String(e));
    }
    setAction(null);
  };

  const handleSync = async () => {
    setSyncing(true);
    setAction("sync");
    setOutput("Syncing with GitHub...\n");
    try {
      const res = await fetch("/api/clawhub", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ action: "sync" }),
      });
      const data = await res.json();
      setOutput(data.output || data.error || "Sync complete");
      fetchInstalled();
    } catch (e) {
      setOutput("Error: " + String(e));
    }
    setAction(null);
    setSyncing(false);
  };

  const handleAnalyze = async () => {
    if (!selectedSkill) return;
    setAction("analyze");
    setOutput("Analyzing skill...\n");
    try {
      const res = await fetch(`/api/clawhub?action=analyze&slug=${encodeURIComponent(selectedSkill.slug)}`);
      const data = await res.json();
      setSkillDetails({
        description: data.description,
        triggers: data.triggers
      });
      
      let output = `📋 ${selectedSkill.name}\n`;
      output += `${"─".repeat(40)}\n\n`;
      output += `💬 ${data.description || "N/A"}\n\n`;
      output += `🎯 Triggers: ${data.triggers || "N/A"}\n\n`;
      
      if (data.overview) {
        output += `📝 Overview:\n${data.overview.substring(0, 500)}${data.overview.length > 500 ? "..." : ""}\n\n`;
      }
      
      if (data.scripts && data.scripts.length > 0) {
        output += `🛠️ Scripts: ${data.scripts.join(", ")}\n\n`;
      }
      
      if (data.sections) {
        const relevantSections = Object.entries(data.sections).filter(([k]) => 
          !["overview", "triggers", "description", "guardrails"].includes(k.toLowerCase())
        );
        if (relevantSections.length > 0) {
          output += `📚 Sections:\n`;
          relevantSections.forEach(([title, body]) => {
            output += `  ▸ ${title}\n`;
          });
          output += `\n`;
        }
      }
      
      if (data.projectMatches && data.projectMatches.length > 0) {
        output += `🎯 Project Matches:\n`;
        output += `${"─".repeat(40)}\n`;
        data.projectMatches.forEach((m: {name: string; relevance: string; why: string}) => {
          output += `\n  📦 ${m.name.toUpperCase()}\n`;
          output += `     ${m.why}\n`;
        });
        output += `\n`;
      } else {
        output += `❌ No direct project matches found\n`;
      }
      
      setOutput(output);
    } catch (e) {
      setOutput("Error: " + String(e));
    }
    setAction(null);
  };

  const handleClone = async () => {
    if (!selectedSkill) return;
    setAction("clone");
    setOutput("Creating custom version...\n");
    try {
      const res = await fetch("/api/clawhub", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ action: "clone", slug: selectedSkill.slug }),
      });
      const data = await res.json();
      setOutput(data.output || data.error || "Clone complete!");
      fetchInstalled();
    } catch (e) {
      setOutput("Error: " + String(e));
    }
    setAction(null);
  };

  const handlePush = async () => {
    setAction("push");
    setOutput("Pushing to GitHub...\n");
    try {
      const res = await fetch("/api/clawhub", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ action: "push" }),
      });
      const data = await res.json();
      setOutput(data.output || data.error || "Push complete");
    } catch (e) {
      setOutput("Error: " + String(e));
    }
    setAction(null);
  };

  const isInstalled = (slug: string) => {
    return AGENTS.some((agent) => installedSkills[agent]?.includes(slug));
  };

  const getCategoryName = (catId: string) => {
    return CATEGORIES.find((c) => c.id === catId)?.name || catId;
  };

  return (
    <div className="min-h-screen bg-slate-950 text-white">
      <BackToMC />
      
      <div className="p-6">
        <div className="mb-6">
          <h1 className="text-3xl font-bold text-white mb-2">🛒 ClawHub Marketplace</h1>
          <p className="text-slate-400">Search, install, and manage skills across all agents</p>
        </div>

        {/* Agent Status Bar */}
        <div className="bg-slate-800 rounded-xl p-4 mb-6 border border-slate-700">
          <div className="flex items-center justify-between mb-3">
            <h2 className="font-semibold text-lg">Agent Skills Status</h2>
            <div className="flex gap-2">
              <button
                onClick={handleSync}
                disabled={syncing}
                className="text-sm bg-blue-700 hover:bg-blue-600 disabled:bg-blue-800 px-3 py-1 rounded transition flex items-center gap-1"
              >
                {syncing ? "⏳" : "🔄"} Sync
              </button>
              <button
                onClick={handlePush}
                className="text-sm bg-green-700 hover:bg-green-600 px-3 py-1 rounded transition"
              >
                ⬆️ Push
              </button>
              <button
                onClick={fetchInstalled}
                className="text-sm bg-slate-700 hover:bg-slate-600 px-3 py-1 rounded transition"
              >
                ↻ Refresh
              </button>
            </div>
          </div>
          <div className="grid grid-cols-3 gap-4">
            {AGENTS.map((agent) => (
              <div key={agent} className="bg-slate-700 rounded-lg p-3">
                <div className="font-medium mb-2">{AGENT_LABELS[agent]}</div>
                <div className="text-xs text-slate-400">
                  {installedSkills[agent]?.length || 0} skills installed
                </div>
                <div className="text-xs text-slate-500 mt-1">
                  {installedSkills[agent]?.slice(0, 3).join(", ") || "None"}
                  {installedSkills[agent]?.length > 3 && "..."}
                </div>
              </div>
            ))}
          </div>
        </div>

        {/* View Toggle */}
        <div className="flex gap-2 mb-4">
          <button
            onClick={refreshPopular}
            className={`px-4 py-2 rounded-lg font-medium transition ${
              view === "popular" ? "bg-orange-600" : "bg-slate-700 hover:bg-slate-600"
            }`}
          >
            🔥 Popular
          </button>
          <button
            onClick={() => { setView("categories"); }}
            className={`px-4 py-2 rounded-lg font-medium transition ${
              view === "categories" ? "bg-orange-600" : "bg-slate-700 hover:bg-slate-600"
            }`}
          >
            📂 Categories
          </button>
        </div>

        {/* Search */}
        <div className="flex gap-4 mb-6">
          <input
            type="text"
            value={search}
            onChange={(e) => setSearch(e.target.value)}
            onKeyDown={(e) => { if (e.key === "Enter") { searchSkills(search); setView("search"); } }}
            placeholder="Search skills..."
            className="flex-1 bg-slate-800 border border-slate-700 rounded-lg px-4 py-2 text-white placeholder-slate-400 focus:outline-none focus:border-blue-500"
          />
          <button
            onClick={() => { searchSkills(search); setView("search"); }}
            className="bg-blue-600 hover:bg-blue-700 px-6 py-2 rounded-lg font-medium transition"
          >
            Search
          </button>
        </div>

        {/* Categories View */}
        {view === "categories" && !categoryView && (
          <div className="mb-6">
            <div className="flex flex-wrap gap-3">
              {CATEGORIES.map((cat) => (
                <button
                  key={cat.id}
                  onClick={() => {
                    setCategoryView(cat.id);
                    setSkills(categorySkills[cat.id] || []);
                  }}
                  className="bg-slate-800 hover:bg-slate-700 border border-slate-700 hover:border-slate-600 rounded-xl px-6 py-4 flex flex-col items-center gap-2 transition min-w-[140px]"
                >
                  <span className="text-2xl">{cat.icon}</span>
                  <span className="font-medium text-white">{cat.name}</span>
                  <span className="text-xs text-slate-400">{categorySkills[cat.id]?.length || 0} skills</span>
                </button>
              ))}
            </div>
          </div>
        )}

        {view === "categories" && categoryView && (
          <div className="mb-4">
            <button
              onClick={() => setCategoryView(null)}
              className="text-slate-400 hover:text-white flex items-center gap-2 mb-4"
            >
              ← Back to Categories
            </button>
            <div className="flex items-center gap-3">
              <span className="text-2xl">{CATEGORIES.find(c => c.id === categoryView)?.icon}</span>
              <h2 className="text-xl font-bold">{CATEGORIES.find(c => c.id === categoryView)?.name}</h2>
            </div>
          </div>
        )}

        {/* Popular/Search/Category View */}
        {(view === "popular" || view === "search" || (view === "categories" && categoryView)) && (
          <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
            {/* Skills List */}
            <div className="bg-slate-800 rounded-xl border border-slate-700 overflow-hidden">
              <div className="p-4 border-b border-slate-700 bg-slate-800">
                <h2 className="font-semibold text-lg">
                  {view === "popular" ? "🔥 Popular Skills" : view === "categories" ? CATEGORIES.find(c => c.id === categoryView)?.name || "Category" : "Search Results"}
                </h2>
                <p className="text-sm text-slate-400">{skills.length} skills found</p>
              </div>
              <div className="max-h-[500px] overflow-y-auto">
                {loading ? (
                  <div className="p-8 text-center text-slate-400">Loading...</div>
                ) : skills.length === 0 ? (
                  <div className="p-8 text-center text-slate-400">No skills found</div>
                ) : (
                  skills.map((skill) => {
                    const installed = isInstalled(skill.slug);
                    return (
                      <button
                        key={skill.slug}
                        onClick={() => setSelectedSkill(skill)}
                        className={`w-full text-left p-4 border-b border-slate-700 hover:bg-slate-700 transition ${
                          selectedSkill?.slug === skill.slug ? "bg-slate-700" : ""
                        } ${installed ? "border-l-4 border-l-green-500" : ""}`}
                      >
                        <div className="flex items-start justify-between">
                          <div>
                            <div className="font-medium text-white">{skill.name}</div>
                            <div className="text-sm text-slate-400 mt-1">@{skill.slug}</div>
                            {skill.category && view === "popular" && (
                              <span className="text-xs bg-slate-600 px-2 py-0.5 rounded mt-1 inline-block">
                                {getCategoryName(skill.category)}
                              </span>
                            )}
                          </div>
                          <div className="flex flex-col items-end gap-1">
                            <span className="text-xs bg-slate-600 px-2 py-0.5 rounded">
                              {skill.score?.toFixed(3)}
                            </span>
                            {installed && (
                              <span className="text-xs bg-green-600 px-2 py-0.5 rounded">
                                ✓
                              </span>
                            )}
                          </div>
                        </div>
                      </button>
                    );
                  })
                )}
              </div>
            </div>

            {/* Detail Panel */}
            <div className="bg-slate-800 rounded-xl border border-slate-700 overflow-hidden">
              <div className="p-4 border-b border-slate-700 bg-slate-800">
                <h2 className="font-semibold text-lg">
                  {selectedSkill ? selectedSkill.name : "Select a Skill"}
                </h2>
                {selectedSkill && (
                  <p className="text-sm text-slate-400">@{selectedSkill.slug}</p>
                )}
              </div>

              {!selectedSkill ? (
                <div className="p-8 text-center text-slate-400">
                  Click a skill to see details
                </div>
              ) : (
                <div className="p-4">
                  {/* Agent Selector */}
                  <div className="mb-4">
                    <h3 className="text-sm font-semibold text-slate-300 mb-2">Install On:</h3>
                    <div className="flex flex-wrap gap-2 mb-2">
                      {AGENTS.map((agent) => (
                        <button
                          key={agent}
                          onClick={() => toggleAgent(agent)}
                          className={`px-3 py-1.5 rounded-lg text-sm font-medium transition ${
                            selectedAgents.includes(agent)
                              ? "bg-blue-600 text-white"
                              : "bg-slate-700 text-slate-300 hover:bg-slate-600"
                          }`}
                        >
                          {AGENT_LABELS[agent]}
                        </button>
                      ))}
                    </div>
                    <button
                      onClick={selectAll}
                      className="text-xs text-slate-400 hover:text-white transition"
                    >
                      Select All
                    </button>
                  </div>

                  {/* Action Buttons */}
                  <div className="flex flex-col gap-2 mb-4">
                    <button
                      onClick={handleAnalyze}
                      disabled={action !== null}
                      className="bg-blue-600 hover:bg-blue-700 disabled:bg-blue-800 px-4 py-2 rounded-lg font-medium transition flex items-center justify-center gap-2"
                    >
                      {action === "analyze" ? "⏳ Analyzing..." : "🔍 Analyze Skill"}
                    </button>
                    <button
                      onClick={handleClone}
                      disabled={action !== null}
                      className="bg-purple-600 hover:bg-purple-700 disabled:bg-purple-800 px-4 py-2 rounded-lg font-medium transition flex items-center justify-center gap-2"
                    >
                      {action === "clone" ? "⏳ Creating..." : "🧬 Make My Version"}
                    </button>
                    <div className="border-t border-slate-600 pt-2 mt-2">
                      <button
                        onClick={handleInstall}
                        disabled={action !== null || selectedAgents.length === 0}
                        className="w-full bg-green-600 hover:bg-green-700 disabled:bg-green-800 disabled:cursor-not-allowed px-4 py-2 rounded-lg font-medium transition flex items-center justify-center gap-2"
                      >
                        {action === "install" ? "⏳ Installing..." : `✅ Install on ${selectedAgents.length} agent(s)`}
                      </button>
                      <button
                        onClick={handleDelete}
                        disabled={action !== null || selectedAgents.length === 0 || !isInstalled(selectedSkill.slug)}
                        className="w-full bg-red-600 hover:bg-red-700 disabled:bg-red-800 disabled:cursor-not-allowed px-4 py-2 rounded-lg font-medium transition flex items-center justify-center gap-2 mt-2"
                      >
                        {action === "delete" ? "⏳ Removing..." : `🗑️ Remove from ${selectedAgents.length} agent(s)`}
                      </button>
                    </div>
                  </div>

                  {/* Output */}
                  {output && (
                    <div className="bg-slate-900 rounded-lg p-4 border border-slate-600">
                      <h3 className="text-sm font-semibold text-slate-300 mb-2">Output</h3>
                      <pre className="text-sm text-slate-200 whitespace-pre-wrap font-mono overflow-auto max-h-64 leading-relaxed">
                        {output}
                      </pre>
                    </div>
                  )}
                </div>
              )}
            </div>
          </div>
        )}
      </div>
    </div>
  );
}