import sys
from pathlib import Path
from datetime import datetime, date, timedelta
import os
import pymysql

from knihovny.medicus_db import MedicusDB
from knihovny.vzpb2b_client import VZPB2BClient
from jinja2 import Environment, FileSystemLoader
from weasyprint import HTML

# ==========================================
# PROJECT ROOT (import + paths)
# ==========================================
script_location = Path(__file__).resolve().parent
project_root = script_location.parent
sys.path.insert(0, str(project_root))

# ==========================================
# CONFIGURATION
# ==========================================
MEDICUS_HOST = "192.168.1.4"
MEDICUS_DB_PATH = r"z:\Medicus 3\data\MEDICUS.FDB"

MYSQL_CONFIG = {
    "host": "192.168.1.76",
    "port": 3307,
    "user": "root",
    "password": "Vlado9674+",
    "database": "medevio",
    "charset": "utf8mb4",
    "autocommit": True
}

PFX_PATH = project_root / "certificates" / "MBcert.pfx"
PFX_PASSWORD = "Vlado7309208104++"

ENV = "prod"
ICZ = "00000000"
DIC = "00000000"

if not PFX_PATH.exists():
    raise FileNotFoundError(f"PFX certificate not found: {PFX_PATH}")

# ==========================================
# PATHS (templates, output)
# ==========================================
template_dir = project_root / "Templates"
output_dir = script_location / "Output"
output_dir.mkdir(exist_ok=True)

font_regular = (template_dir / "fonts" / "DejaVuSans.ttf").as_uri()
font_bold = (template_dir / "fonts" / "DejaVuSans-Bold.ttf").as_uri()
font_italic = (template_dir / "fonts" / "DejaVuSans-Oblique.ttf").as_uri()

# ==========================================
# INIT CONNECTIONS
# ==========================================
print("Connecting to Medicus...")
medicus = MedicusDB(MEDICUS_HOST, MEDICUS_DB_PATH)

print("Connecting to MySQL...")
mysql = pymysql.connect(
    cursorclass=pymysql.cursors.DictCursor,
    **MYSQL_CONFIG
)

print("Initializing VZP B2B client...")
vzp = VZPB2BClient(
    ENV,
    str(PFX_PATH),
    PFX_PASSWORD,
    icz=ICZ,
    dic=DIC
)

# ==========================================
# BINÁRNÍ HLEDÁNÍ DATA ZLOMU
# ==========================================
def find_insurance_break_date(vzp_client, rc, start_date, end_date):
    try:
        low = start_date
        high = end_date

        stav_low = vzp_client.parse_stav_pojisteni(
            vzp_client.stav_pojisteni(rc=rc, k_datu=low.isoformat())
        )["stav"]

        stav_high = vzp_client.parse_stav_pojisteni(
            vzp_client.stav_pojisteni(rc=rc, k_datu=high.isoformat())
        )["stav"]

        if stav_low != "1" or stav_high == "1":
            return None, None

        while (high - low).days > 1:
            mid = low + timedelta(days=(high - low).days // 2)

            xml = vzp_client.stav_pojisteni(rc=rc, k_datu=mid.isoformat())
            stav_mid = vzp_client.parse_stav_pojisteni(xml)["stav"]

            if stav_mid == "1":
                low = mid
            else:
                high = mid

        return low, high

    except Exception:
        return None, None

# ==========================================
# FETCH REGISTERED PATIENTS
# ==========================================
print("Fetching registered patients from Medicus...")
patients = medicus.get_active_registered_patients(as_dict=True)
patients_by_rc = {p["rodcis"]: p for p in patients}
print(f"Loaded {len(patients_by_rc)} registered patients")

# ==========================================
# FETCH LAST INSURANCE STATES
# ==========================================
sql_last_states = """
SELECT rc, stav
FROM (
    SELECT rc, stav,
           ROW_NUMBER() OVER (PARTITION BY rc ORDER BY k_datu DESC) AS rn
    FROM vzp_stav_pojisteni
) t
WHERE rn = 1
"""

with mysql.cursor() as cur:
    cur.execute(sql_last_states)
    last_states = cur.fetchall()

# ==========================================
# COMPARE + BREAK DATE
# ==========================================
suspected = []
today = date.today()

for row in last_states:
    rc = row["rc"]
    stav = row["stav"]

    if rc in patients_by_rc and stav != "1":
        p = patients_by_rc[rc]

        with mysql.cursor() as c2:
            c2.execute("""
                SELECT MAX(k_datu) AS last_insured
                FROM vzp_stav_pojisteni
                WHERE rc = %s AND stav = '1'
            """, (rc,))
            r2 = c2.fetchone()
            last_known_insured = r2["last_insured"]

        insured_to = uninsured_from = None
        if last_known_insured:
            insured_to, uninsured_from = find_insurance_break_date(
                vzp, rc, last_known_insured, today
            )

        suspected.append({
            "rc": rc,
            "prijmeni": p["prijmeni"],
            "jmeno": p["jmeno"],
            "poj": p["poj"],
            "stav": stav,
            "insured_to": insured_to,
            "uninsured_from": uninsured_from
        })

print(f"Nalezeno {len(suspected)} problémových záznamů")

# ==========================================
# CLEANUP DB
# ==========================================
medicus.close()
mysql.close()

# ==========================================
# PDF GENERATION
# ==========================================
env = Environment(loader=FileSystemLoader(str(template_dir)), autoescape=True)
template = env.get_template("vzp_console_report.html")

html_content = template.render(
    patients=suspected,
    generated_at=datetime.now().strftime("%d. %m. %Y %H:%M"),
    font_regular=font_regular,
    font_bold=font_bold,
    font_italic=font_italic
)

timestamp = datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
pdf_file = output_dir / f"kontrola_pojisteni_{timestamp}.pdf"

print("Generuji PDF přes WeasyPrint...")
HTML(string=html_content, base_url=str(template_dir)).write_pdf(pdf_file)

print("\n✅ PDF REPORT VYTVOŘEN:")
print(pdf_file.resolve())

try:
    os.startfile(pdf_file)
except Exception:
    pass