"""openai/math reasoning_traces PDF'lerini sayfa sayfa OpenAI vision ile Markdown+LaTeX'e çevirir.

Her sayfa için görüntü ve PyMuPDF metin katmanı birlikte gönderilir: kelimeler metin
katmanından doğru okunur, formül yapısı görüntüden kurulur. Sonuç sayfa başına
`raw/ocr/<slug>/<sayfa>.json` olarak saklanır; yeniden çalıştırınca biten sayfalar atlanır.
Kota 1M grubundan düşer; `--budget` aşılmadan durur (önceki çalıştırmalar dahil).

    python3 ocr_reasoning.py --pages irrationality-exponent-of-pi:5   # pilot
    python3 ocr_reasoning.py                                          # hepsi
"""
import argparse
import base64
import json
import sys
from concurrent.futures import ThreadPoolExecutor
from pathlib import Path

import fitz
from dotenv import load_dotenv
from openai import OpenAI

HERE = Path(__file__).parent
TRACES = HERE / "raw" / "math" / "reasoning_traces"
OCR = HERE / "raw" / "ocr"
MODEL = "gpt-6-sol"
EFFORT = "none"
DPI = 150

PROMPT = """You are transcribing one page of a mathematics document (an abridged summary of a model's chain of thought) into Markdown with LaTeX math.

You get the page image and the PDF's text layer. The text layer has the correct words but broken math: italic Unicode letters, lost spaces, flattened sub/superscripts, broken line wraps. Use the image as the authority for structure and math, and the text layer to spell words exactly.

Rules:
- Transcribe everything on the page in reading order, verbatim. Do not summarize, correct, complete, or add anything.
- Math: inline as $...$, display as $$...$$ on their own lines. Use standard LaTeX (\\pi, \\mathbb{Z}, x^{2}, a_{k}, \\frac{}{}, \\le). No Unicode math letters.
- Headings as Markdown headings (#, ##, ###) matching the visual hierarchy. Keep bold/italic. Lists as Markdown lists. Tables as Markdown tables.
- Monospace quoted blocks (original prompt excerpts and "VERBATIM EXCERPT" passages): put the label shown above the block, if any, on its own line in bold (`**VERBATIM EXCERPT**`), then the block text in a ```text fenced block. Copy it exactly as written; do not convert its ASCII math to LaTeX. Join lines that wrap only because they reached the right margin; keep real line breaks (list items, indented lines, blank lines).
- Join lines that wrap within a paragraph; remove hyphenation introduced by line breaks; separate paragraphs with one blank line.
- Omit running headers, footers and page numbers.
- If the page begins or ends mid-sentence, begin or end mid-sentence as well.
- Keep URLs, citation markers like [17], and reference list entries exactly.

Output only the page's Markdown, with no preamble and no surrounding code fence."""


def page_inputs(pdf: Path, index: int):
    with fitz.open(pdf) as doc:
        page = doc[index]
        png = page.get_pixmap(dpi=DPI).tobytes("png")
        text = page.get_text("text")
    return base64.b64encode(png).decode(), text


def ocr_page(client: OpenAI, pdf: Path, index: int, model: str, effort: str) -> dict:
    img, text = page_inputs(pdf, index)
    resp = client.responses.create(
        model=model,
        reasoning={"effort": effort},
        input=[{"role": "user", "content": [
            {"type": "input_text", "text": PROMPT},
            {"type": "input_text", "text": f"Text layer of page {index + 1}:\n<<<\n{text}\n>>>"},
            {"type": "input_image", "image_url": f"data:image/png;base64,{img}", "detail": "high"},
        ]}],
    )
    if resp.status != "completed":
        raise RuntimeError(f"{pdf.stem} s.{index + 1}: {resp.status} {resp.incomplete_details}")
    u = resp.usage
    return {"slug": pdf.stem, "page": index + 1, "model": model, "markdown": resp.output_text.strip(),
            "input_tokens": u.input_tokens, "output_tokens": u.output_tokens,
            "reasoning_tokens": u.output_tokens_details.reasoning_tokens}


def spent() -> int:
    return sum(r["input_tokens"] + r["output_tokens"]
               for r in (json.loads(p.read_text()) for p in OCR.glob("*/*.json")))


def main():
    ap = argparse.ArgumentParser()
    ap.add_argument("--pages", nargs="*", help="slug:sayfa (1 tabanlı); verilmezse tüm PDF'ler")
    ap.add_argument("--model", default=MODEL)
    ap.add_argument("--effort", default=EFFORT, help="modelin desteklediği en düşük reasoning effort")
    ap.add_argument("--budget", type=int, default=900_000, help="tüm çalıştırmalar için toplam token sınırı")
    ap.add_argument("--workers", type=int, default=8)
    args = ap.parse_args()
    load_dotenv(HERE.parents[1] / ".env")
    client = OpenAI()

    if args.pages:
        jobs = [(TRACES / f"{s.split(':')[0]}.pdf", int(s.split(':')[1]) - 1) for s in args.pages]
    else:
        jobs = []
        for pdf in sorted(TRACES.glob("*.pdf")):
            with fitz.open(pdf) as doc:
                jobs += [(pdf, i) for i in range(doc.page_count)]
    jobs = [(pdf, i) for pdf, i in jobs if not (OCR / pdf.stem / f"{i + 1:03d}.json").exists()]

    used = spent()
    print(f"{len(jobs)} sayfa kaldı, şimdiye kadar {used:,} token", flush=True)
    with ThreadPoolExecutor(args.workers) as pool:
        pending = list(jobs)
        while pending:
            if used >= args.budget:
                sys.exit(f"bütçe doldu: {used:,} >= {args.budget:,}; {len(pending)} sayfa kaldı")
            batch, pending = pending[:args.workers], pending[args.workers:]
            for r in pool.map(lambda j: ocr_page(client, j[0], j[1], args.model, args.effort), batch):
                out = OCR / r["slug"] / f"{r['page']:03d}.json"
                out.parent.mkdir(parents=True, exist_ok=True)
                out.write_text(json.dumps(r, ensure_ascii=False, indent=1))
                used += r["input_tokens"] + r["output_tokens"]
                print(f"{r['slug']} s.{r['page']}: {r['input_tokens']}+{r['output_tokens']} (toplam {used:,})", flush=True)


if __name__ == "__main__":
    main()