import os
import time
import asyncio
from typing import Dict, Any
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import WebDriverException, TimeoutException

from selenium_UnitedDH_claimSubmitWorker import AutomationUnitedDHClaimSubmit

sessions: Dict[str, Dict[str, Any]] = {}

SESSION_OTP_TIMEOUT = int(os.getenv("SESSION_OTP_TIMEOUT", "120"))


def make_session_entry() -> str:
    import uuid
    sid = str(uuid.uuid4())
    sessions[sid] = {
        "status": "created",
        "created_at": time.time(),
        "last_activity": time.time(),
        "bot": None,
        "driver": None,
        "otp_event": asyncio.Event(),
        "otp_value": None,
        "result": None,
        "message": None,
    }
    return sid


async def cleanup_session(sid: str, message: str | None = None):
    s = sessions.get(sid)
    if not s:
        return
    try:
        if s.get("status") not in ("completed", "error", "not_found"):
            s["status"] = "error"
        if message:
            s["message"] = message
        ev = s.get("otp_event")
        if ev and not ev.is_set():
            ev.set()
    finally:
        sessions.pop(sid, None)
        print(f"[helpers_uniteddh_claim] cleaned session {sid}")


async def _remove_session_later(sid: str, delay: int = 20):
    await asyncio.sleep(delay)
    await cleanup_session(sid)


def _minimize_browser(bot):
    try:
        if bot and bot.driver:
            try:
                bot.driver.get("about:blank")
            except Exception:
                pass
            try:
                bot.driver.minimize_window()
                print("[UnitedDH Claim] Browser minimized after error")
                return
            except Exception:
                pass
            try:
                bot.driver.set_window_position(-10000, -10000)
                print("[UnitedDH Claim] Browser moved off-screen after error")
            except Exception:
                pass
    except Exception as e:
        print(f"[UnitedDH Claim] Could not hide browser: {e}")


async def start_uniteddh_claim_run(sid: str, data: dict, url: str):
    """
    Run the United/DentalHub claim workflow.
    Login/OTP handling mirrors helpers_ddma_claim.py exactly.
    Claim steps call selenium_UnitedDH_claimSubmitWorker.
    """
    s = sessions.get(sid)
    if not s:
        return {"status": "error", "message": "session not found"}

    s["status"] = "running"
    s["last_activity"] = time.time()

    bot = None
    try:
        bot = AutomationUnitedDHClaimSubmit(data)
        bot.config_driver()

        s["bot"] = bot
        s["driver"] = bot.driver
        s["last_activity"] = time.time()

        try:
            bot.driver.maximize_window()
            bot.driver.get(url)
            await asyncio.sleep(1)
        except Exception as e:
            s["status"] = "error"
            s["message"] = f"Navigation failed: {e}"
            await cleanup_session(sid)
            return {"status": "error", "message": s["message"]}

        # --- Login ---
        try:
            login_result = bot.login(url)
        except WebDriverException as wde:
            s["status"] = "error"
            s["message"] = f"Selenium driver error during login: {wde}"
            await cleanup_session(sid, s["message"])
            return {"status": "error", "message": s["message"]}
        except Exception as e:
            s["status"] = "error"
            s["message"] = f"Unexpected error during login: {e}"
            await cleanup_session(sid, s["message"])
            return {"status": "error", "message": s["message"]}

        # ── Already logged in ────────────────────────────────────────────────
        if isinstance(login_result, str) and login_result == "ALREADY_LOGGED_IN":
            print("[UnitedDH Claim] Session persisted — skipping OTP")
            s["status"] = "running"
            s["message"] = "Session persisted"

        # ── OTP required ─────────────────────────────────────────────────────
        elif isinstance(login_result, str) and login_result == "OTP_REQUIRED":
            s["status"] = "waiting_for_otp"
            s["message"] = "OTP required for login - please enter OTP in browser"
            s["last_activity"] = time.time()

            driver = s["driver"]
            max_polls = SESSION_OTP_TIMEOUT
            login_success = False

            print(f"[UnitedDH Claim OTP] Waiting for user to enter OTP (polling browser for {SESSION_OTP_TIMEOUT}s)...")

            for poll in range(max_polls):
                await asyncio.sleep(1)
                s["last_activity"] = time.time()

                try:
                    # Check if OTP was submitted via API (from app)
                    otp_value = s.get("otp_value")
                    if otp_value:
                        print(f"[UnitedDH Claim OTP] OTP received from app: {otp_value}")
                        try:
                            otp_input = driver.find_element(By.XPATH,
                                "//input[contains(@name,'otp') or contains(@name,'code') or @type='tel' or contains(@aria-label,'Verification') or contains(@placeholder,'code')]"
                            )
                            otp_input.clear()
                            otp_input.send_keys(otp_value)
                            try:
                                verify_btn = driver.find_element(By.XPATH, "//button[@type='button' and @aria-label='Verify']")
                                verify_btn.click()
                                print("[UnitedDH Claim OTP] Clicked verify button (aria-label)")
                            except:
                                try:
                                    verify_btn = driver.find_element(By.XPATH, "//button[contains(text(),'Verify') or contains(text(),'Submit') or @type='submit']")
                                    verify_btn.click()
                                    print("[UnitedDH Claim OTP] Clicked verify button (text/type)")
                                except:
                                    otp_input.send_keys("\n")
                                    print("[UnitedDH Claim OTP] Pressed Enter as fallback")
                            print("[UnitedDH Claim OTP] OTP typed and submitted via app")
                            s["otp_value"] = None
                            await asyncio.sleep(3)
                        except Exception as type_err:
                            print(f"[UnitedDH Claim OTP] Failed to type OTP from app: {type_err}")

                    # Check current URL - if we're on dashboard/member page, login succeeded
                    current_url = driver.current_url.lower()
                    print(f"[UnitedDH Claim OTP Poll {poll+1}/{max_polls}] URL: {current_url[:60]}...")

                    if "member" in current_url or "dashboard" in current_url or "eligibility" in current_url or "home" in current_url:
                        try:
                            WebDriverWait(driver, 5).until(
                                EC.presence_of_element_located((By.XPATH,
                                    '//input[@placeholder="Search by member ID"] | //input[contains(@placeholder,"Search")] | //*[contains(@class,"dashboard")]'
                                ))
                            )
                            print("[UnitedDH Claim OTP] Dashboard/search element found - login successful!")
                            login_success = True
                            break
                        except TimeoutException:
                            print("[UnitedDH Claim OTP] On member page but search input not found, continuing to poll...")

                    # Also check if OTP input is still visible
                    try:
                        driver.find_element(By.XPATH,
                            "//input[contains(@name,'otp') or contains(@name,'code') or @type='tel' or contains(@aria-label,'Verification') or contains(@placeholder,'code') or contains(@placeholder,'Code')]"
                        )
                        print(f"[UnitedDH Claim OTP Poll {poll+1}] OTP input still visible - waiting...")
                    except:
                        if "login" in current_url or "app/login" in current_url:
                            print("[UnitedDH Claim OTP] OTP input gone, trying to navigate to dashboard...")
                            try:
                                driver.get("https://app.dentalhub.com/app/dashboard")
                                await asyncio.sleep(2)
                            except:
                                pass

                except Exception as poll_err:
                    print(f"[UnitedDH Claim OTP Poll {poll+1}] Error: {poll_err}")

            if not login_success:
                try:
                    print("[UnitedDH Claim OTP] Final attempt - navigating to dashboard...")
                    driver.get("https://app.dentalhub.com/app/dashboard")
                    await asyncio.sleep(3)
                    WebDriverWait(driver, 10).until(
                        EC.presence_of_element_located((By.XPATH,
                            '//input[@placeholder="Search by member ID"] | //input[contains(@placeholder,"Search")] | //*[contains(@class,"dashboard")]'
                        ))
                    )
                    print("[UnitedDH Claim OTP] Dashboard element found - login successful!")
                    login_success = True
                except TimeoutException:
                    s["status"] = "error"
                    s["message"] = "OTP timeout - login not completed"
                    await cleanup_session(sid)
                    return {"status": "error", "message": "OTP not completed in time"}
                except Exception as final_err:
                    s["status"] = "error"
                    s["message"] = f"OTP verification failed: {final_err}"
                    await cleanup_session(sid)
                    return {"status": "error", "message": s["message"]}

            if login_success:
                s["status"] = "running"
                s["message"] = "Login successful after OTP"
                print("[UnitedDH Claim OTP] Proceeding to claim steps...")

        # ── Login succeeded without OTP ───────────────────────────────────────
        elif isinstance(login_result, str) and login_result == "SUCCESS":
            print("[UnitedDH Claim] Login succeeded without OTP")
            s["status"] = "running"
            s["message"] = "Login succeeded"

        # ── Login error ───────────────────────────────────────────────────────
        elif isinstance(login_result, str) and login_result.startswith("ERROR"):
            s["status"] = "error"
            s["message"] = login_result
            await cleanup_session(sid)
            return {"status": "error", "message": login_result}

        # --- Claim steps ---
        for step_name, step_fn in [
            ("step1_search_patient",        bot.step1_search_patient),
            ("step2_click_submit_claim",    bot.step2_click_submit_claim),
            ("step3_continue_prefilled",    bot.step3_continue_prefilled),
            ("step4_select_insurance_ok",   bot.step4_select_insurance_ok),
            ("step5_practitioner_continue", bot.step5_practitioner_continue),
            ("step6_fill_claim_form",       bot.step6_fill_claim_form),
            ("step7_attach_files",          bot.step7_attach_files),
            ("step8_submit_claim",          bot.step8_submit_claim),
        ]:
            result = step_fn()
            print(f"[UnitedDH Claim] {step_name} result: {result}")
            if isinstance(result, str) and result.startswith("ERROR"):
                s["status"] = "error"
                s["message"] = result
                _minimize_browser(bot)
                asyncio.create_task(_remove_session_later(sid, 30))
                return {"status": "error", "message": result}

        # --- Step 9: PDF + claim number ---
        step9_result = bot.step9_save_confirmation_pdf()
        print(f"[UnitedDH Claim] step9 result: {step9_result}")
        if isinstance(step9_result, str) and step9_result.startswith("ERROR"):
            print(f"[UnitedDH Claim] step9 warning (non-fatal): {step9_result}")
            step9_result = {}

        pdf_path = step9_result.get("pdf_path") if isinstance(step9_result, dict) else None
        pdf_url = None
        if pdf_path:
            import os as _os
            filename = _os.path.basename(pdf_path)
            port = _os.getenv("PORT", "5002")
            url_host = _os.getenv("HOST", "localhost")
            pdf_url = f"http://{url_host}:{port}/downloads/{filename}"
            print(f"[UnitedDH Claim] pdf_url: {pdf_url}")

        claim_number = step9_result.get("claimNumber") if isinstance(step9_result, dict) else None

        result = {
            "status": "success",
            "message": "United/DentalHub claim submitted successfully",
            "claimNumber": claim_number,
            "pdf_url": pdf_url,
        }
        s["status"] = "completed"
        s["result"] = result
        s["message"] = "completed"

        # Close browser window (session preserved in profile via UnitedSCO browser manager)
        try:
            from unitedsco_browser_manager import get_browser_manager as _gbm
            _gbm().quit_driver()
            print("[UnitedDH Claim] Browser closed - session preserved in profile")
        except Exception as close_err:
            print(f"[UnitedDH Claim] Could not close browser (non-fatal): {close_err}")

        asyncio.create_task(_remove_session_later(sid, 60))
        return result

    except Exception as e:
        if s:
            s["status"] = "error"
            s["message"] = f"worker exception: {e}"
        await cleanup_session(sid)
        return {"status": "error", "message": f"worker exception: {e}"}


def submit_otp(sid: str, otp: str) -> Dict[str, Any]:
    s = sessions.get(sid)
    if not s:
        return {"status": "error", "message": "session not found"}
    if s.get("status") != "waiting_for_otp":
        return {"status": "error", "message": f"session not waiting for otp (state={s.get('status')})"}
    s["otp_value"] = otp
    s["last_activity"] = time.time()
    try:
        s["otp_event"].set()
    except Exception:
        pass
    return {"status": "ok", "message": "otp accepted"}


def get_session_status(sid: str) -> Dict[str, Any]:
    s = sessions.get(sid)
    if not s:
        return {"status": "not_found"}
    return {
        "session_id": sid,
        "status": s.get("status"),
        "message": s.get("message"),
        "created_at": s.get("created_at"),
        "last_activity": s.get("last_activity"),
        "result": s.get("result") if s.get("status") in ("completed", "error") else None,
    }
