import glob
import json
import os
import re

ROOT = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
LOG_PATH = os.path.join(ROOT, "docs", "progress-log.md")
README_PATH = os.path.join(ROOT, "README.md")
ADR_DIR = os.path.join(ROOT, "docs", "adr")


def latest_progress_entry():
    try:
        with open(LOG_PATH, encoding="utf-8") as f:
            text = f.read()
    except FileNotFoundError:
        return ""
    for part in re.split(r"^---$", text, flags=re.MULTILINE):
        if re.search(r"^## ", part, re.MULTILINE):
            return part.strip()
    return ""


def readme_text():
    try:
        with open(README_PATH, encoding="utf-8") as f:
            return f.read().strip()
    except FileNotFoundError:
        return ""


def adr_index():
    lines = []
    for path in sorted(glob.glob(os.path.join(ADR_DIR, "*.md"))):
        try:
            with open(path, encoding="utf-8") as f:
                first_line = f.readline().strip()
        except OSError:
            continue
        title = re.sub(r"^#\s*", "", first_line)
        lines.append(f"- `docs/adr/{os.path.basename(path)}`: {title}")
    return "\n".join(lines)


sections = [
    "Project: Duoc Thu RAG medical chatbot (D:\\VSF-DUOCTHU). "
    "This is an automated orientation summary, not the full picture — read "
    "the referenced files (README.md, docs/architecture.md, the specific "
    "ADR, CLAUDE.md) before making claims about scope, architecture, or "
    "what already exists."
]

readme = readme_text()
if readme:
    sections.append("## README.md\n\n" + readme)

adrs = adr_index()
if adrs:
    sections.append(
        "## Architecture decision records (docs/adr/) — titles only, "
        "read the full ADR before relying on its rationale/consequences:\n\n"
        + adrs
    )

progress = latest_progress_entry()
if progress:
    sections.append("## Latest entry from docs/progress-log.md\n\n" + progress)

if len(sections) > 1:
    print(json.dumps({
        "hookSpecificOutput": {
            "hookEventName": "SessionStart",
            "additionalContext": "\n\n".join(sections),
        }
    }))