// Main UI management
const UI = {
  async init() {
    // Tab switching
    $$(".tab").forEach(tab => {
      tab.addEventListener("click", () => {
        const target = tab.dataset.tab;
        this.switchTab(target);
        
        // Load tab data
        if (target === "search") this.initSearch();
        if (target === "memories") this.loadMemories();
        if (target === "findings") this.loadFindings();
        if (target === "pipeline" && STORE.currentSessionId) this.loadPipelineSession(STORE.currentSessionId);
      });
    });
    
    // Pipeline mode toggle
    const pipelineCheck = $("#pipeline-mode");
    const pipelineModeSelect = $("#pipeline-output-mode");
    if (pipelineCheck) {
      pipelineCheck.addEventListener("change", () => {
        const on = pipelineCheck.checked;
        pipelineModeSelect.style.display = on ? "inline-block" : "none";
        const toggles = document.querySelectorAll("#skill-toggles .skill-toggle");
        toggles.forEach(t => {
          const cb = t.querySelector("input");
          if (cb) cb.disabled = on;
        });
      });
    }
    
    // Rebuild pipeline button
    const rebuildBtn = $("#rebuild-pipeline");
    if (rebuildBtn && STORE.currentSessionId) {
      rebuildBtn.addEventListener("click", () => UI.loadPipelineSession(STORE.currentSessionId));
    }
    
    // Search
    $("#execute-search").addEventListener("click", () => this.executeSearch());
    $("#search-query").addEventListener("keydown", (e) => {
      if (e.key === "Enter") this.executeSearch();
    });
    
    // Check models
    $("#check-models").addEventListener("click", () => this.checkModels());
    
    // Load state
    await loadInitialState();
    
    // Init sub-modules
    DOC_VIEWER.init();
    RESEARCH_UI.init();
    DOC_UI.init();
  },
  
  switchTab(tabName) {
    $$(".tab").forEach(t => t.classList.remove("active"));
    $$(".tab-pane").forEach(p => p.classList.remove("active"));
    document.querySelector(`[data-tab="${tabName}"]`).classList.add("active");
    $(`#tab-${tabName}`).classList.add("active");
  },
  
  initSearch() {
    // Search already bound in HTML
  },
  
  async executeSearch() {
    const query = $("#search-query").value.trim();
    if (!query) return showToast("Enter a search query", "error");
    
    const type = $("#search-type").value;
    const resultsEl = $("#search-results");
    resultsEl.innerHTML = '<div class="spinner"></div> <span class="typing">Searching...</span>';
    
    try {
      let results;
      if (type === "semantic") {
        results = await RESEARCH_UI.runSemanticSearch(query, STORE.currentDocId);
      } else {
        results = await RESEARCH_UI.runTextSearch(query, STORE.currentDocId);
      }
      
      if (!results.length) {
        resultsEl.innerHTML = '<div style="padding:20px;color:var(--text-muted);text-align:center">No results found</div>';
        return;
      }
      
      resultsEl.innerHTML = results.map(r => {
        const score = r.similarity ?? r.rank ?? 0;
        const page = r.page_num != null ? `p${r.page_num}` : "";
        const truncated = r.content ? r.content.substring(0, 200) : "";
        
        // Highlight matching text
        let content = truncated.replace(/&/g, '&amp;')
          .replace(/</g, '&lt;')
          .replace(/>/g, '&gt;');
        if (query) {
          const regex = new RegExp(`(${query.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')})`, 'gi');
          content = content.replace(regex, '<mark>$1</mark>');
        }
        
        return `
          <div class="search-result-item" data-chunk-id="${r.id}">
            <div class="result-score">Score: ${score.toFixed(3)}</div>
            <div class="result-content">${content}${truncated.length >= 200 ? '...' : ''}</div>
            <div class="result-meta">${page} · ${r.chunk_type || 'text'}</div>
          </div>`;
      }).join('');
      
      // Click to show chunk in viewer
      resultsEl.querySelectorAll(".search-result-item").forEach(item => {
        item.addEventListener("click", () => {
          const chunkId = item.dataset.chunkId;
          if (STORE.currentDocId) {
            DOC_VIEWER.showChunkInfo(chunkId);
          }
        });
      });
      
    } catch (e) {
      resultsEl.innerHTML = `<p style="color:var(--accent-red);padding:20px">Search error: ${e.message}</p>`;
    }
  },
  
  async loadMemories() {
    const list = $("#memories-list");
    list.innerHTML = '<div class="spinner"></div>';
    
    try {
      if (STORE.currentSessionId) {
        const res = await API.get(`/api/research/memories?session_id=${STORE.currentSessionId}`);
        list.innerHTML = (res.memories || []).map(m => `
          <div class="memory-item">
            <div class="memory-type">${m.memory_type || "fact"} (imp: ${m.importance || "?"})</div>
            <div class="memory-content">${m.content ? m.content.substring(0, 300) : "(empty)"}</div>
          </div>`).join('') || '<div style="color:var(--text-muted);padding:12px">No memories</div>';
      } else {
        list.innerHTML = '<div style="color:var(--text-muted);padding:12px">No active session</div>';
      }
    } catch (e) {
      list.innerHTML = `<div style="color:var(--accent-red);padding:12px">${e.message}</div>`;
    }
  },
  
  async loadFindings() {
    const list = $("#findings-list");
    list.innerHTML = '<div class="spinner"></div>';
    
    try {
      const findings = await RESEARCH_UI.getFindings(STORE.currentSessionId);
      list.innerHTML = findings.length ? findings.map(f => `
        <div class="finding-item">
          <div class="finding-agent">${f.agent_name || "unknown"}</div>
          <div class="finding-query">${f.question || "N/A"}</div>
          <div class="finding-answer">${(f.answer || f.summary || "").substring(0, 400)}</div>
        </div>`).join('') : '<div style="color:var(--text-muted);padding:12px">No findings yet</div>';
    } catch (e) {
      list.innerHTML = `<div style="color:var(--accent-red);padding:12px">${e.message}</div>`;
    }
  },
  
  async checkModels() {
    const list = $("#model-list");
    list.innerHTML = '<div class="spinner"></div>';
    
    try {
      const res = await API.get("/api/ollama/models");
      const models = res.models || [];
      list.innerHTML = models.length ? models.map(m => `
        <div style="font-size:11px;padding:3px 8px;color:var(--accent-green)">
          ${m.name || m.model}
        </div>`).join('') : '<div style="font-size:11px;padding:3px 8px;color:var(--text-muted)">None found</div>';
    } catch (e) {
      list.innerHTML = `<div style="font-size:11px;padding:3px 8px;color:var(--accent-red)">Off: ${e.message}</div>`;
    }
  },
  
  updateHealth(health) {
    const dot = $("#health-indicator .health-dot");
    const text = $("#health-indicator");
    if (dot) {
      dot.className = health.status === "ok" ? "health-dot healthy" : "health-dot";
      text.textContent = health.status === "ok" ? "All systems operational" : "Systems degraded";
    }
  },
  
  renderModels(models) {
    if (!models?.models?.length) return;
    const list = $("#model-list");
    if (list) {
      list.innerHTML = models.models.map(m => `
        <div style="font-size:11px;padding:3px 8px;color:var(--accent-green)">
          ${m.name || m.model}
        </div>`).join('');
    }
  },
};