from docx import Document
import subprocess, sys, re, ast, os
from pathlib import Path
from typing import List, Tuple
try:
    from gemini_post import clean_and_extract, post_check
    _HAS_GEMINI = True
except ImportError:
    _HAS_GEMINI = False


def _save_docx_from_text(text: str, dest: Path) -> None:
    doc = Document()
    for para in (text or "").split("\n\n"):
        p = doc.add_paragraph()
        lines = para.splitlines() or [""]
        for i, line in enumerate(lines):
            run = p.add_run(line)
            if i < len(lines) - 1:
                run.add_break()
    doc.save(dest)


def run_ocr(in_file, out_dir_str, lang,
            use_doc_unwarping, use_doc_orientation, use_textline_orientation,
            use_server_rec, server_rec_dir_str,
            use_gpu, gpu_id) -> Tuple[str, str, List[str]]:

    if not in_file:
        return "Файл не выбран.", "", []

    in_path = Path(in_file if isinstance(in_file, (str, os.PathLike)) else getattr(in_file, "name"))
    out_dir = Path(out_dir_str)
    out_dir.mkdir(parents=True, exist_ok=True)

    server_rec_dir = Path(server_rec_dir_str) if server_rec_dir_str else Path("")

    cmd = [sys.executable, "-m", "paddleocr", "ocr",
           "-i", str(in_path), "--lang", str(lang), "--save_path", str(out_dir)]

    if use_doc_unwarping:
        cmd += ["--use_doc_unwarping", "true"]
    if use_doc_orientation:
        cmd += ["--use_doc_orientation_classify", "true"]
    if use_textline_orientation:
        cmd += ["--use_textline_orientation", "true"]

    if use_server_rec and server_rec_dir.exists():
        cmd += ["--rec_model_dir", str(server_rec_dir)]

    if use_gpu:
        try:
            gid = int(gpu_id)
        except Exception:
            gid = 0
        cmd += ["--device", f"gpu:{gid}"]

    log_file = out_dir / f"{in_path.stem}_paddleocr.log"
    log_text = "[CMD] " + " ".join(cmd) + "\n"

    with log_file.open("w", encoding="utf-8") as lf:
        proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, text=True)
        for line in proc.stdout:
            log_text += line
            lf.write(line)
        rc = proc.wait()

    if rc != 0:
        log_text += f"\n[ERROR] CLI вернул код {rc}. Лог: {log_file}\n"

    candidates = sorted(out_dir.glob(f"{in_path.stem}_page*.txt")) or \
                 sorted(out_dir.glob(f"{in_path.stem}.txt"))

    merged_path = out_dir / f"{in_path.stem}_ALL.txt"
    merged_text = ""
    files_out = [str(log_file)]

    if candidates:
        with merged_path.open("w", encoding="utf-8") as w:
            for i, p in enumerate(candidates, 1):
                w.write(p.read_text(encoding="utf-8"))
                if i < len(candidates):
                    w.write("\n\n")
        merged_text = merged_path.read_text(encoding="utf-8")
        files_out.append(str(merged_path))
    else:
        log = log_file.read_text(encoding="utf-8", errors="ignore")
        texts = []
        for m in re.finditer(r"['\"]rec_texts['\"]:\s*(\[[^\]]*\])", log, flags=re.S):
            try:
                arr = ast.literal_eval(m.group(1))
                if isinstance(arr, list):
                    texts.extend([str(x) for x in arr])
            except Exception:
                continue
        if texts:
            merged_path.write_text("\n".join(texts), encoding="utf-8")
            merged_text = merged_path.read_text(encoding="utf-8")
            files_out.append(str(merged_path))
        else:
            log_text += "\n[WARN] Не нашёл *.txt и не смог извлечь rec_texts из лога."

    if merged_text:
        docx_path = out_dir / f"{in_path.stem}_ALL.docx"
        _save_docx_from_text(merged_text, docx_path)
        files_out.append(str(docx_path))
        log_text += f"\n[DOCX] Добавлен: {docx_path}"

    use_gemini_env   = os.getenv("USE_GEMINI", "0") == "1"
    do_postcheck_env = os.getenv("GEMINI_POSTCHECK", "0") == "1"
    gemini_model     = os.getenv("GEMINI_MODEL", "gemini-1.5-pro")

    if _HAS_GEMINI and use_gemini_env and merged_text and merged_text != "(пусто)":
        try:
            clean_md, data_json = clean_and_extract(merged_text, model_name=gemini_model)

            clean_path = out_dir / f"{in_path.stem}_clean.md"
            data_path  = out_dir / f"{in_path.stem}_extracted.json"
            clean_path.write_text(clean_md or "", encoding="utf-8")
            data_path.write_text(data_json or "{}", encoding="utf-8")
            files_out += [str(clean_path), str(data_path)]

            if clean_md:
                docx_clean = out_dir / f"{in_path.stem}_clean.docx"
                _save_docx_from_text(clean_md, docx_clean)
                files_out.append(str(docx_clean))
                log_text += f"\n[DOCX] CLEAN_MARKDOWN -> {docx_clean}"

            log_text += "\n[Gemini] CLEAN_MARKDOWN и EXTRACTED_JSON готовы."

            if do_postcheck_env:
                report_json = post_check(clean_md, data_json, model_name=gemini_model)
                report_path = out_dir / f"{in_path.stem}_postcheck.json"
                report_path.write_text(report_json or "{}", encoding="utf-8")
                files_out.append(str(report_path))
                log_text += "\n[Gemini] Post-check отчёт готов."
        except Exception as e:
            log_text += f"\n[Gemini ERROR] {e}"

    return log_text, (merged_text if merged_text else "(пусто)"), files_out