"""
استيراد قوالب WQL من Excel إلى قاعدة البيانات.

يُشغَّل مرة واحدة:
    cd d:\GP\murshid_backend
    .venv\Scripts\python.exe scripts\import_excel_templates.py
"""

import sys
import re
from pathlib import Path

# أضف مسار الباكند لاستيراد app
sys.path.insert(0, str(Path(__file__).resolve().parent.parent))

import openpyxl
from sqlalchemy.orm import Session

from app.config import settings
from app.db.session import SessionLocal
from app.models.query_template import QueryTemplate
from app.models.technique import Technique

EXCEL_PATH = Path(settings.murshid_models_dir) / "murshid_query_template_structure_clean_shared.xlsx"

# Fallback: same directory as project root
if not EXCEL_PATH.is_file():
    EXCEL_PATH = Path(__file__).resolve().parent.parent.parent / "murshid_query_template_structure_clean_shared.xlsx"

def normalise_query(q: str | None) -> str:
    """Collapse whitespace/newlines in WQL query."""
    if not q:
        return ""
    return re.sub(r"\s+", " ", q.strip())


def run(db: Session, replace: bool = False) -> dict:
    if not EXCEL_PATH.is_file():
        return {"error": f"Excel file not found: {EXCEL_PATH}"}

    wb = openpyxl.load_workbook(EXCEL_PATH)
    ws = wb.active

    rows = list(ws.iter_rows(min_row=2, values_only=True))

    inserted_techniques = 0
    inserted_templates  = 0
    skipped             = 0
    errors              = []

    for idx, row in enumerate(rows, start=2):
        technique_id   = str(row[0] or "").strip()
        technique_name = str(row[1] or "").strip()
        template_id_str = str(row[2] or "").strip()  # e.g. "T1484-1"
        purpose        = str(row[3] or "").strip() or None
        wql_query      = normalise_query(str(row[4] or ""))
        note           = str(row[5] or "").strip() or None

        if not technique_id or not wql_query:
            skipped += 1
            continue

        # 1. Upsert Technique
        tech = db.get(Technique, technique_id)
        if tech is None:
            tech = Technique(
                technique_id=technique_id,
                technique_name=technique_name or technique_id,
                tactic=None,
            )
            db.add(tech)
            db.flush()
            inserted_techniques += 1
        elif technique_name and not tech.technique_name:
            tech.technique_name = technique_name

        # 2. Insert QueryTemplate (skip duplicate template_id_str unless replace=True)
        # Check uniqueness by (technique_id + purpose) to avoid duplicates on re-run
        existing = (
            db.query(QueryTemplate)
            .filter(
                QueryTemplate.technique_id == technique_id,
                QueryTemplate.purpose == purpose,
            )
            .first()
        )

        if existing:
            if replace:
                existing.wql_query = wql_query
                existing.note      = note
                existing.is_active = True
                inserted_templates += 1
            else:
                skipped += 1
            continue

        tpl = QueryTemplate(
            technique_id=technique_id,
            purpose=purpose,
            wql_query=wql_query,
            note=note,
            is_active=True,
        )
        db.add(tpl)
        inserted_templates += 1

    db.commit()

    return {
        "excel_path":          str(EXCEL_PATH),
        "rows_processed":      len(rows),
        "techniques_inserted": inserted_techniques,
        "templates_inserted":  inserted_templates,
        "skipped":             skipped,
        "errors":              errors,
    }


if __name__ == "__main__":
    replace = "--replace" in sys.argv

    db: Session = SessionLocal()
    try:
        result = run(db, replace=replace)
        print("\n=== Import Result ===")
        for k, v in result.items():
            print(f"  {k}: {v}")
    finally:
        db.close()