// Store - Application state management
const Store = {
  currentDoc: null,
  currentSession: null,
  documents: [],
  sessions: [],
  memories: [],
  findings: [],
  pageChunks: [],
  currentPage: 0,
  polygonsVisible: true,
  textVisible: true,
  chunkLabelsVisible: true,
};

// ── API Helper ──
async function api(endpoint, options = {}) {
  const defaultOpts = {
    headers: { 'Content-Type': 'application/json' },
  };
  const merged = { ...defaultOpts, ...options };
  if (options.body && typeof options.body === 'object' && !(options.body instanceof FormData)) {
    merged.body = JSON.stringify(options.body);
  }
  const url = endpoint.startsWith('http') ? endpoint : `/api${endpoint}`;
  const resp = await fetch(url, merged);
  if (!resp.ok) {
    const text = await resp.text();
    throw new Error(`${resp.status}: ${text}`);
  }
  const ct = resp.headers.get('content-type') || '';
  if (ct.includes('json')) return resp.json();
  return resp;
}

// ── Document Store ──
const DocStore = {
  async load() {
    const res = await api('/documents');
    Store.documents = res.documents || [];
    return Store.documents;
  },

  async getChunks(docId, page) {
    const params = new URLSearchParams();
    if (page !== undefined) params.set('page', page);
    const res = await api(`/documents/${docId}/chunks?${params}`);
    Store.pageChunks = res.chunks || [];
    return Store.pageChunks;
  },

  async upload(file) {
    const fd = new FormData();
    fd.append('file', file);
    const res = await api('/documents/upload', { method: 'POST', body: fd });
    return res;
  },

  async uploadUrl(url, filename) {
    const res = await api('/documents/upload', {
      method: 'POST',
      body: { pdf_url: url, filename },
    });
    return res;
  },
};

// ── Research Store ──
const ResearchStore = {
  async run(query, skillNames) {
    const res = await api('/research/run', {
      method: 'POST',
      body: { query, skills: skillNames, doc_id: Store.currentDoc },
    });
    return res;
  },

  async createSession(query) {
    const res = await api('/research/session', {
      method: 'POST',
      body: query,
    });
    return res;
  },

  async semanticSearch(query, limit = 20) {
    const res = await api('/research/semantic', {
      method: 'POST',
      body: { query, doc_id: Store.currentDoc, limit },
    });
    return res;
  },

  async textSearch(query, limit = 20) {
    const res = await api('/research/text-search', {
      method: 'POST',
      body: { query, doc_id: Store.currentDoc, limit },
    });
    return res;
  },

  async getFindings(sessionId) {
    const res = await api(`/research/findings?session_id=${sessionId || ''}`);
    Store.findings = res.findings || [];
    return Store.findings;
  },

  async getMemories(sessionId) {
    const res = await api(`/research/memories?session_id=${sessionId || ''}`);
    Store.memories = res.memories || [];
    return Store.memories;
  },

  async saveFinding(sessionId, query, response) {
    await api('/research/run', {
      method: 'POST',
      body: { query, doc_id: sessionId },
    });
  },
};

// ── Memory Store ──
const MemoryStore = {
  async save(content, type = 'fact', importance = 3, sourceDocId) {
    const res = await api('/memories/save', {
      method: 'POST',
      body: {
        session_id: Store.currentSession,
        content,
        memory_type: type,
        importance,
        source_doc_id: sourceDocId,
      },
    });
    return res;
  },

  async search(query, limit = 10) {
    const res = await api('/memories/search', {
      method: 'POST',
      body: { query, limit },
    });
    return res;
  },
};

// ── Agent Store ──
const AgentStore = {
  async getSkills() {
    const res = await api('/agents/skills');
    return res.skills;
  },

  async chat(message, model) {
    const res = await api('/ollama/chat', {
      method: 'POST',
      body: {
        model: model || 'gpt-oss:20b',
        messages: [{ role: 'user', content: message }],
      },
    });
    return res;
  },
};

// ── Viewer Store ──
const ViewerStore = {
  async getPolygonView(docId, page) {
    const res = await api(`/documents/${docId}/polygon-view?page=${page}`);
    return res;
  },

  async getPageText(docId, page) {
    const res = await api(`/documents/${docId}/page-text?page=${page}`);
    return res;
  },
};

// ── Health Store ──
const HealthStore = {
  async check() {
    const res = await api('/health');
    return res;
  },
};