#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Сборка базы (индекса) проекта из full_ocr_results.json в заданной папке.
Использование:
    python build_index.py <input_folder>
"""

import sys
import json
import re
from pathlib import Path

def build_index_for_folder(folder: Path):
    ocr_path = folder / "full_ocr_results.json"
    if not ocr_path.exists():
        print(f"[ERR] Не найден {ocr_path}")
        return
    
    data = json.loads(ocr_path.read_text(encoding="utf-8"))
    pages = data["pages"]
    index_path = folder / "project_index.json"
    
    # --- метаданные из текстового слоя первых страниц ---
    meta = {}
    front_text = "\n".join(p["pdf_text_layer"] for p in pages[:3])
    m = re.search(r'(180-[^\s\n]+)', front_text)
    if m: meta["document_number"] = m.group(1)
    m = re.search(r'Заказчик[:\s]+([^\n]+)', front_text)
    if m: meta["customer"] = m.group(1).strip()
    m = re.search(r'(\d{2}\.\d{2}\.\d{2,4})', front_text)
    if m: meta["date"] = m.group(1)
    m = re.search(r'Главный инженер проекта\s*\n?\s*([^\n()]+)', front_text)
    if m: meta["chief_engineer"] = m.group(1).strip()
    
    # --- оглавление ---
    toc = []
    toc_text = "\n".join(p["pdf_text_layer"] for p in pages[2:6])
    for line in toc_text.splitlines():
        line = line.strip()
        m = re.search(r'^(.+?)\s*\.\.\.\.?\s*(\d+)\s*$', line)
        if m:
            title = m.group(1).strip()
            page = int(m.group(2))
            if len(title) > 5 and not title.startswith("180-"):
                toc.append({"title": title, "page": page})
    
    # --- индекс страниц ---
    page_index = []
    for p in pages:
        ocr_text = "\n".join(l["text"] for l in p["ocr_lines"])
        preview = ocr_text[:400] + "..." if len(ocr_text) > 400 else ocr_text
        page_index.append({
            "page_number": p["page_number"],
            "image": p["image"],
            "line_count": p["ocr_line_count"],
            "pdf_text_preview": p["pdf_text_layer"][:300] if p["pdf_text_layer"] else "",
            "ocr_text_preview": preview,
        })
    
    # --- сущности ---
    floors, axes, dims, rooms, dates, docs = set(), set(), set(), set(), set(), set()
    floor_re = re.compile(r"(\d+)[-\s]?й\s*этаж", re.I)
    axis_re = re.compile(r"\b([А-Я])\b")
    num_axis_re = re.compile(r"\b(\d{1,2})\b")
    dim_re = re.compile(r"\b(\d{3,5})\b")
    room_re = re.compile(r"([Кк]вартира|[Кк]в\.?\s*\d+|[Пп]омещение\s*\d+)", re.I)
    date_re = re.compile(r"\b(\d{2}\.\d{2}\.\d{2,4})\b")
    doc_re = re.compile(r"(180-[^\s\n]+)")
    
    for p in pages:
        for entry in p["ocr_lines"]:
            t = entry["text"]
            for m in floor_re.finditer(t): floors.add(m.group(0))
            for m in axis_re.finditer(t): axes.add(m.group(1))
            for m in num_axis_re.finditer(t):
                v = m.group(1)
                if v.isdigit() and 1 <= int(v) <= 50: axes.add(v)
            for m in dim_re.finditer(t):
                v = m.group(1)
                if 100 <= int(v) <= 20000: dims.add(v)
            for m in room_re.finditer(t): rooms.add(m.group(0))
            for m in date_re.finditer(t): dates.add(m.group(1))
            for m in doc_re.finditer(t): docs.add(m.group(1))
    
    entities = {
        "floors": sorted(floors), "axes": sorted(axes),
        "dimensions": sorted(dims), "rooms": sorted(rooms),
        "dates": sorted(dates), "document_refs": sorted(docs),
    }
    
    index = {
        "project": {
            "document_number": meta.get("document_number"),
            "customer": meta.get("customer"),
            "date": meta.get("date"),
            "chief_engineer": meta.get("chief_engineer"),
            "total_pdf_pages": len(pages),
            "ocr_processed_pages": len(pages),
        },
        "table_of_contents": toc,
        "pages": page_index,
        "entities": entities,
        "sources": {"ocr_json": str(ocr_path)}
    }
    
    with open(index_path, "w", encoding="utf-8") as f:
        json.dump(index, f, ensure_ascii=False, indent=2)
    
    print(f"[build_index] Saved -> {index_path}")
    print(f"  Pages: {len(page_index)}, TOC: {len(toc)}")
    print(f"  Entities: { {k: len(v) for k,v in entities.items()} }")

def main():
    folder = Path(sys.argv[1]) if len(sys.argv) > 1 else Path(r"D:\TEST docs\output_123")
    build_index_for_folder(folder)

if __name__ == "__main__":
    main()