"""Estimate generator: parse job description into structured estimate."""
import json, sys, os, re
sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
from lib.db import get_db, init_db
from scripts.pricing_catalog import get_catalog, list_catalogs
from scripts.project_mgmt import create_job, create_estimate

# Common construction scope patterns → (category, unit, base_hours_per_unit)
SCOPE_PATTERNS = {
    r"cabinet": ("finish_carpentry", "lf", 2.5),
    r"countertop": ("tile", "sf", 0.5),
    r"floor": ("flooring", "sf", 0.15),
    r"tile": ("tile", "sf", 0.25),
    r"paint": ("painting", "sf", 0.05),
    r"drywall": ("drywall", "sf", 0.1),
    r"electric": ("electrical", "ea", 4),
    r"plumb": ("plumbing", "ea", 6),
    r"frame|wall": ("framing", "lf", 1.5),
    r"demo": ("demolition", "sf", 0.08),
    r"roof": ("roofing", "sf", 0.12),
    r"concrete|foundation": ("concrete", "cy", 8),
    r"window": ("finish_carpentry", "ea", 3),
    r"door": ("finish_carpentry", "ea", 4),
    r"deck": ("framing", "sf", 0.3),
    r"bathroom": ("plumbing", "ea", 40),
    r"kitchen": ("general_labor", "ea", 120),
}

# Material cost estimates per unit
MATERIAL_COSTS = {
    "cabinet": 250, "countertop": 75, "flooring": 8, "tile": 12,
    "paint": 0.50, "drywall": 3, "electrical": 150, "plumbing": 200,
    "framing": 5, "demolition": 2, "roofing": 6, "concrete": 180,
    "window": 600, "door": 400, "deck": 15, "bathroom": 3000, "kitchen": 8000,
}

def generate(description, job_id=None, catalog_id=None, markup_percent=20):
    """Generate estimate from text description."""
    # Get pricing catalog
    if catalog_id:
        catalog = get_catalog(catalog_id)
    else:
        cats = list_catalogs()
        catalog = cats["catalogs"][0] if cats["catalogs"] else None
    rates = catalog.get("labor_rates", {}) if catalog else {}
    markups = catalog.get("material_markups", {}) if catalog else {}

    # Extract quantities from description
    sqft_match = re.search(r"(\d+)\s*(?:sq\s*ft|sqft|sf)", description, re.I)
    sqft = int(sqft_match.group(1)) if sqft_match else 200  # default

    # Build line items from description
    line_items = []
    desc_lower = description.lower()
    matched = False

    for pattern, (category, unit, hours_per) in SCOPE_PATTERNS.items():
        if re.search(pattern, desc_lower):
            matched = True
            qty = sqft if unit == "sf" else (sqft / 10 if unit == "lf" else 1)
            labor_rate = rates.get(category, 75)
            labor_hours = qty * hours_per
            labor_cost = labor_hours * labor_rate

            # Material cost
            mat_key = next((k for k in MATERIAL_COSTS if re.search(pattern, k)), None)
            mat_cost = MATERIAL_COSTS.get(mat_key, 10) * qty if mat_key else qty * 10
            mat_markup = markups.get(category, 1.15)
            mat_cost *= mat_markup

            line_items.append({
                "description": f"{category.replace('_',' ').title()} — {pattern.replace('|','/')}",
                "category": "labor", "quantity": round(labor_hours, 1),
                "unit": "hr", "unit_cost": labor_rate
            })
            line_items.append({
                "description": f"Materials — {pattern.replace('|','/')}",
                "category": "materials", "quantity": round(qty, 1),
                "unit": unit, "unit_cost": round(mat_cost / qty, 2)
            })

    if not matched:
        # Generic estimate based on sqft
        line_items = [
            {"description": "General Labor", "category": "labor", "quantity": sqft * 0.2, "unit": "hr", "unit_cost": rates.get("general_labor", 55)},
            {"description": "Materials (general)", "category": "materials", "quantity": sqft, "unit": "sf", "unit_cost": 15},
        ]

    # Create job if needed
    if not job_id:
        job_result = create_job("TBD", description=description)
        job_id = job_result["id"]

    # Create estimate
    result = create_estimate(job_id, line_items, markup_percent=markup_percent)
    result["line_items_count"] = len(line_items)
    result["description"] = description
    return result

if __name__ == "__main__":
    init_db()
    if len(sys.argv) < 2:
        print(json.dumps({"error": "usage: estimate_generator.py <description> [catalog_id] [job_id]"}))
    else:
        desc = sys.argv[1]
        cat_id = sys.argv[2] if len(sys.argv) > 2 else None
        jid = sys.argv[3] if len(sys.argv) > 3 else None
        print(json.dumps(generate(desc, job_id=jid, catalog_id=cat_id), indent=2))