import urllib.request
import re
import json
import time

# Batch 5 Registry for Verification
batch_5_registry = [
    {"url": "https://howdoyouconvert.com/calculator/fahrenheit-to-celsius/?ao_noptimize=1", "f": 5/9, "o": -32 * 5/9, "v1": 32, "ev2": 0},
    {"url": "https://howdoyouconvert.com/calculator/fahrenheit-to-celsius/?ao_noptimize=1", "f": 5/9, "o": -32 * 5/9, "v1": 212, "ev2": 100},
    {"url": "https://howdoyouconvert.com/calculator/feet-per-second-to-meters-per-second/?ao_noptimize=1", "f": 0.3048, "o": 0, "v1": 1, "ev2": 0.3048},
    {"url": "https://howdoyouconvert.com/calculator/fluid-ounces-to-milliliters/?ao_noptimize=1", "f": 29.5735296, "o": 0, "v1": 1, "ev2": 29.5735296},
    {"url": "https://howdoyouconvert.com/calculator/gallons-per-minute-to-liters-per-second/?ao_noptimize=1", "f": 0.0630901964, "o": 0, "v1": 1, "ev2": 0.0630901964},
    {"url": "https://howdoyouconvert.com/calculator/grains-to-grams/?ao_noptimize=1", "f": 0.06479891, "o": 0, "v1": 1, "ev2": 0.06479891},
    {"url": "https://howdoyouconvert.com/calculator/grams-to-milligrams/?ao_noptimize=1", "f": 1000.0, "o": 0, "v1": 1, "ev2": 1000},
    {"url": "https://howdoyouconvert.com/calculator/grams-to-ounces/?ao_noptimize=1", "f": 0.0352739619, "o": 0, "v1": 100, "ev2": 3.52739619},
    {"url": "https://howdoyouconvert.com/calculator/grams-to-pennyweights/?ao_noptimize=1", "f": 0.643014931, "o": 0, "v1": 100, "ev2": 64.3014931},
    {"url": "https://howdoyouconvert.com/calculator/grams-to-troy-ounces/?ao_noptimize=1", "f": 0.0321507466, "o": 0, "v1": 100, "ev2": 3.21507466},
    {"url": "https://howdoyouconvert.com/calculator/gray-to-rad/?ao_noptimize=1", "f": 100.0, "o": 0, "v1": 1, "ev2": 100},
]

def verify_math(calc):
    print(f"\n--- Verifying {calc['url']} with v1={calc['v1']} ---")
    headers = {"User-Agent": "Mozilla/5.0"}
    try:
        req = urllib.request.Request(calc['url'], headers=headers)
        resp = urllib.request.urlopen(req).read().decode('utf-8')
        
        scripts = re.findall(r'<script.*?>\s*(.*?)\s*</script>', resp, re.DOTALL)
        logic_script = ""
        for s in scripts:
            if "calculate1" in s and "document.getElementById" in s:
                logic_script = s
                break
        
        if not logic_script:
            print("FAILED: Logic script not found.")
            return False
            
        # Extract formula: let val2 = val1 * factor + offset;
        fwd_match = re.search(r'let val2 = val1 \* (.*?) \+ (.*?);', logic_script)
        rev_match = re.search(r'let val1 = \(val2 - (.*?)\) \/ (.*?);', logic_script)
        
        if not fwd_match or not rev_match:
            print("FAILED: Could not parse logic components.")
            return False
        
        m_actual = float(fwd_match.group(1))
        b_actual = float(fwd_match.group(2))
        
        print(f"Detected Formula: y = {m_actual}x + {b_actual}")
        
        # Test math locally
        v2 = calc['v1'] * m_actual + b_actual
        v1 = (v2 - b_actual) / m_actual
        
        print(f"Test v1={calc['v1']} -> v2={v2} (Expected {calc['ev2']})")
        
        # Allow small floating point difference
        if abs(v2 - calc['ev2']) < max(1e-7, calc['ev2'] * 1e-7) and abs(v1 - calc['v1']) < 1e-7:
            print("SUCCESS")
            return True
        else:
            print("FAILED math check")
            return False
            
    except Exception as e:
        print(f"ERROR: {e}")
        return False

all_ok = True
for c in batch_5_registry:
    if not verify_math(c): all_ok = False
    time.sleep(1)

if all_ok: print("\nALL BATCH 5 VERIFIED.")
else: print("\nBATCH 5 FAILED.")