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_DDMA_claimSubmitWorker import AutomationDDMAClaimSubmit
from ddma_browser_manager import get_browser_manager

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_ddma_claim] cleaned session {sid}")


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


async def start_ddma_claim_run(sid: str, data: dict, url: str):
    """
    Run the DDMA claim workflow — mirrors helpers_ddma_eligibility exactly for
    login/OTP, then continues into claim-specific steps.

    OTP handling uses two complementary strategies:
      1. Accept OTP submitted from the app (via /submit-otp → otp_value)
      2. Poll the browser URL/DOM to detect when user enters OTP directly
    """
    s = sessions.get(sid)
    if not s:
        return {"status": "error", "message": "session not found"}

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

    try:
        bot = AutomationDDMAClaimSubmit(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 (persistent session) ────────────────────────────
        if isinstance(login_result, str) and login_result == "ALREADY_LOGGED_IN":
            print("[DDMA 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"
            s["last_activity"] = time.time()

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

            print(f"[DDMA Claim OTP] Polling for OTP completion (up to {SESSION_OTP_TIMEOUT}s)...")

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

                try:
                    # a) App submitted OTP via /submit-otp endpoint
                    otp_value = s.get("otp_value")
                    if otp_value:
                        print(f"[DDMA Claim OTP poll {poll+1}] OTP received from app, typing it in...")
                        try:
                            otp_input = driver.find_element(By.XPATH,
                                "//input[contains(@aria-label,'Verification') or "
                                "contains(@placeholder,'verification') or @type='tel' or "
                                "contains(@aria-lable,'Verification code') or "
                                "contains(@placeholder,'Enter your verification 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()
                            except Exception:
                                otp_input.send_keys("\n")
                            print("[DDMA Claim OTP] OTP typed and submitted via app")
                            s["otp_value"] = None
                            await asyncio.sleep(3)
                        except Exception as type_err:
                            print(f"[DDMA Claim OTP] Failed to type OTP from app: {type_err}")

                    # b) Check URL — if past OTP page, login succeeded
                    current_url = driver.current_url.lower()
                    print(f"[DDMA Claim OTP poll {poll+1}/{max_polls}] URL: {current_url[:70]}...")

                    if "member" in current_url or "dashboard" in current_url or "eligibility" in current_url:
                        try:
                            WebDriverWait(driver, 5).until(
                                EC.presence_of_element_located((By.XPATH, '//input[@placeholder="Search by member ID"]'))
                            )
                            print("[DDMA Claim OTP] Member search found — login successful!")
                            login_success = True
                            break
                        except TimeoutException:
                            print("[DDMA Claim OTP] On member page but search input not found, continuing...")

                    # Check if OTP input still visible (user hasn't finished)
                    try:
                        driver.find_element(By.XPATH,
                            "//input[contains(@aria-label,'Verification') or "
                            "contains(@placeholder,'verification') or @type='tel']"
                        )
                        print(f"[DDMA Claim OTP poll {poll+1}] OTP input still visible — waiting...")
                    except Exception:
                        # OTP input gone — try navigating to members
                        if "onboarding" in current_url or "start" in current_url:
                            print("[DDMA Claim OTP] OTP input gone, navigating to members page...")
                            try:
                                driver.get("https://providers.deltadentalma.com/members")
                                await asyncio.sleep(2)
                            except Exception:
                                pass

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

            if not login_success:
                # Final attempt — navigate directly to members page
                try:
                    print("[DDMA Claim OTP] Final attempt — navigating to members page...")
                    driver.get("https://providers.deltadentalma.com/members")
                    await asyncio.sleep(3)
                    WebDriverWait(driver, 10).until(
                        EC.presence_of_element_located((By.XPATH, '//input[@placeholder="Search by member ID"]'))
                    )
                    print("[DDMA Claim OTP] Member search 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("[DDMA Claim OTP] Proceeding to claim steps...")

        # ── Login succeeded without OTP ───────────────────────────────────────
        elif isinstance(login_result, str) and login_result == "SUCCESS":
            print("[DDMA 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}

        # --- Step 1: Search patient ---
        step1_result = bot.step1_search_patient()
        print(f"[DDMA Claim] step1 result: {step1_result}")
        if isinstance(step1_result, str) and step1_result.startswith("ERROR"):
            s["status"] = "error"
            s["message"] = step1_result
            await cleanup_session(sid)
            return {"status": "error", "message": step1_result}

        # --- Step 2: Open member information page ---
        step2_result = bot.step2_open_member_page()
        print(f"[DDMA Claim] step2 result: {step2_result}")
        if isinstance(step2_result, str) and step2_result.startswith("ERROR"):
            s["status"] = "error"
            s["message"] = step2_result
            await cleanup_session(sid)
            return {"status": "error", "message": step2_result}

        # --- Step 3: Click Create claim ---
        step3_result = bot.step3_click_create_claim()
        print(f"[DDMA Claim] step3 result: {step3_result}")
        if isinstance(step3_result, str) and step3_result.startswith("ERROR"):
            s["status"] = "error"
            s["message"] = step3_result
            await cleanup_session(sid)
            return {"status": "error", "message": step3_result}

        # --- Step 4: Fill service date + procedure code + tooth/arch/surface ---
        step4_result = bot.step4_fill_claim_form()
        print(f"[DDMA Claim] step4 result: {step4_result}")
        if isinstance(step4_result, str) and step4_result.startswith("ERROR"):
            s["status"] = "error"
            s["message"] = step4_result
            await cleanup_session(sid)
            return {"status": "error", "message": step4_result}

        # --- Step 5: Attach files ---
        step5_result = bot.step5_attach_files()
        print(f"[DDMA Claim] step5 result: {step5_result}")
        if isinstance(step5_result, str) and step5_result.startswith("ERROR"):
            s["status"] = "error"
            s["message"] = step5_result
            await cleanup_session(sid)
            return {"status": "error", "message": step5_result}

        # --- Step 6: Click Next step ---
        step6_result = bot.step6_click_next()
        print(f"[DDMA Claim] step6 result: {step6_result}")
        if isinstance(step6_result, str) and step6_result.startswith("ERROR"):
            s["status"] = "error"
            s["message"] = step6_result
            await cleanup_session(sid)
            return {"status": "error", "message": step6_result}

        # --- Step 7: Acknowledge + Submit claim ---
        step7_result = bot.step7_submit_claim()
        print(f"[DDMA Claim] step7 result: {step7_result}")
        if isinstance(step7_result, str) and step7_result.startswith("ERROR"):
            s["status"] = "error"
            s["message"] = step7_result
            await cleanup_session(sid)
            return {"status": "error", "message": step7_result}

        # --- Step 8: Extract claim number + save confirmation PDF ---
        step8_result = bot.step8_save_confirmation_pdf()
        print(f"[DDMA Claim] step8 result: {step8_result}")
        if isinstance(step8_result, str) and step8_result.startswith("ERROR"):
            # Non-fatal: claim was submitted; log but don't abort
            print(f"[DDMA Claim] step8 warning (non-fatal): {step8_result}")
            step8_result = {}

        # Build pdf_url from pdf_path so the backend can fetch it
        pdf_path = step8_result.get("pdf_path") if isinstance(step8_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"[DDMA Claim] pdf_url: {pdf_url}")

        claim_number = step8_result.get("claimNumber") if isinstance(step8_result, dict) else None

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

        # Close the browser window after claim (session preserved in profile)
        try:
            from ddma_browser_manager import get_browser_manager
            get_browser_manager().quit_driver()
            print("[DDMA Claim] Browser closed - session preserved in profile")
        except Exception as close_err:
            print(f"[DDMA 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,
    }
