from __future__ import annotations

import re
from datetime import date, datetime
from typing import Any
from urllib.parse import urlparse

import gradio as gr
from fastapi import Body
from fastapi.responses import HTMLResponse
from pydantic import BaseModel, ValidationError

from src.dataset_store import DatasetStore, DatasetStoreError
from src.llm_client import LLMClient, LLMError
from src.olostep_client import OlostepClient, OlostepError
from src.schemas import Opportunity, ResearchResult, UserProfile


class ResearchRequest(BaseModel):
    origin: str
    applying_for: str
    field_of_study: str
    preferences: str = ""


class SaveRequest(BaseModel):
    session_id: str
    opportunity_title: str


STORE = DatasetStore()
OLOSTEP = OlostepClient()
RANKER = LLMClient()
SESSIONS: dict[str, ResearchResult] = {}


def build_app() -> gr.Server:
    app = gr.Server()

    @app.api(name="research")
    def research_api(profile: dict[str, Any]) -> dict[str, Any]:
        return research_payload(ResearchRequest(**profile))

    @app.api(name="save")
    def save_api(session_id: str, opportunity_title: str) -> dict[str, Any]:
        return save_payload(SaveRequest(session_id=session_id, opportunity_title=opportunity_title))

    @app.get("/", response_class=HTMLResponse)
    async def homepage() -> str:
        return FRONTEND_HTML

    @app.get("/health")
    async def health() -> dict[str, str]:
        return {"status": "ok"}

    @app.get("/custom/config")
    async def config() -> dict[str, Any]:
        return config_status()

    @app.get("/custom/history")
    async def history(q: str = "") -> dict[str, Any]:
        if q and q.strip():
            return {"records": search_history_records(q.strip()), "query": q.strip()}
        return {"records": history_records()}

    @app.post("/custom/research")
    async def research(request: ResearchRequest = Body(...)) -> dict[str, Any]:
        return research_payload(request)

    @app.post("/custom/save")
    async def save(request: SaveRequest = Body(...)) -> dict[str, Any]:
        return save_payload(request)

    return app


def research_payload(request: ResearchRequest) -> dict[str, Any]:
    try:
        profile = UserProfile(**request.model_dump())
    except ValidationError as exc:
        return {
            "ok": False,
            "message": f"Input error: {exc.errors()[0]['msg']}",
            "result": None,
            "history": history_records(),
        }

    errors: list[str] = []
    live_research_enabled = OLOSTEP.enabled and RANKER.enabled
    if not live_research_enabled:
        return {
            "ok": False,
            "message": "Live research is unavailable. Configure OLOSTEP_API_KEY and HF_TOKEN to search real funding sources.",
            "result": None,
            "history": history_records(),
        }

    try:
        pages = OLOSTEP.search(profile, limit=15)
    except OlostepError as exc:
        errors.append(str(exc))
        pages = []

    opportunities: list[Opportunity] = []
    if pages:
        base = opportunities_from_sources(profile, pages)
        ranked: list[Opportunity] = []
        if RANKER.enabled:
            try:
                ranked = RANKER.rank_opportunities(profile, pages[:8])
            except LLMError as exc:
                errors.append(str(exc))
        opportunities = select_providers(base, ranked) if ranked else []
        if not opportunities:
            opportunities = filter_direct_providers(base)
        opportunities = enrich_opportunities(opportunities, pages)
        opportunities = drop_expired_opportunities(opportunities)

    if not opportunities:
        message = "No direct funding-provider pages were found for this profile. Try broadening the origin, degree, field, or preferences."
        if errors:
            message += " Service note: " + " | ".join(errors[:2])
        return {
            "ok": False,
            "message": message,
            "result": None,
            "history": history_records(),
        }
    else:
        result = ResearchResult(
            profile=profile,
            query=profile.search_query(),
            opportunities=opportunities,
            errors=errors,
        )

    try:
        STORE.record_search(result)
    except DatasetStoreError as exc:
        result.errors.append(str(exc))

    SESSIONS[result.session_id] = result
    return {
        "ok": True,
        "message": result_status(result),
        "result": result.model_dump(mode="json"),
        "history": history_records(),
    }


def save_payload(request: SaveRequest) -> dict[str, Any]:
    result = SESSIONS.get(request.session_id)
    if not result:
        return {"ok": False, "message": "Research session was not found.", "history": history_records()}
    opportunity = find_opportunity(result, request.opportunity_title)
    if not opportunity:
        return {"ok": False, "message": "Selected opportunity was not found.", "history": history_records()}
    try:
        STORE.save_opportunity(result, opportunity)
        message = f"Saved: {opportunity.title}"
    except DatasetStoreError as exc:
        message = f"Saved locally, but dataset write failed: {exc}"
    return {
        "ok": True,
        "message": message,
        "opportunity": opportunity.model_dump(mode="json"),
        "history": history_records(),
    }


def find_opportunity(result: ResearchResult, title: str) -> Opportunity | None:
    return next((opportunity for opportunity in result.opportunities if opportunity.title == title), None)


_MONTHS = (
    r"(?:Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May|Jun(?:e)?|"
    r"Jul(?:y)?|Aug(?:ust)?|Sep(?:t(?:ember)?)?|Oct(?:ober)?|Nov(?:ember)?|Dec(?:ember)?)"
)
_DATE_PATTERN = (
    r"\d{1,2}\s+" + _MONTHS + r"\.?\s+\d{4}"
    r"|" + _MONTHS + r"\.?\s+\d{1,2},?\s+\d{4}"
    r"|\d{4}-\d{2}-\d{2}"
    r"|\d{1,2}/\d{1,2}/\d{2,4}"
    r"|\d{1,2}[\s-]" + _MONTHS + r"[\s-]\d{4}"
    r"|(?:Spring|Summer|Fall|Autumn|Winter)\s+\d{4}"
)
_MONEY_PATTERN = re.compile(
    r"[$€£]\s?\d[\d,]*(?:\.\d+)?\s?(?:thousand|million|mill|k|m|bn)?"
    r"(?:\s?/\s?(?:year|yr|month|mo|annum|day|week))?"
    r"|(?:USD|EUR|GBP|CA\$|AU\$)\s?\d[\d,]*(?:\.\d+)?\s?(?:thousand|million)?"
    r"(?:\s?(?:per|/)\s?(?:year|month|annum))?"
    r"|(?:up to|worth|award(?:ed)? of|prize of|stipend of|value of|grant(?:s)? of|"
    r"scholarship of|fellowship of|totaling|totalling|maximum of|amount of)\s+[$€£]?\s?\d[\d,]*(?:\.\d+)?"
    r"\s?(?:thousand|million|k|m)?"
    r"|[$€£]\s?\d[\d,]*(?:\.\d+)?\s?(?:to|[\-–—])\s?[$€£]?\s?\d[\d,]*"
    r"|full[\s-]?(?:tuition|ride|scholarship|funding|coverage)",
    re.IGNORECASE,
)
_DEADLINE_KEYWORDS = (
    r"(?:deadline|apply by|application(?:s)?\s+(?:close|end|due|deadline|open)|"
    r"closes?\s+(?:on|date)?|due(?:\s+date|s)?|submit(?:ted)?\s+by|submission\s+deadline|"
    r"closing\s+date|last\s+date|expires?|next\s+deadline|final\s+deadline|deadline\s+for|"
    r"applications?\s+(?:will\s+close|must\s+be\s+received))"
)
_DEADLINE_PATTERN = re.compile(
    _DEADLINE_KEYWORDS + r"[^A-Za-z0-9]{0,28}(" + _DATE_PATTERN + r")",
    re.IGNORECASE,
)
_ROLLING_PATTERN = re.compile(
    r"\brolling\s+(?:deadline|admissions?|applications?|basis|review)\b|\brolling\b",
    re.IGNORECASE,
)
_FUTURE_YEAR = re.compile(r"20(?:2[4-9]|3[0-1])")
_ANY_DATE = re.compile(_DATE_PATTERN, re.IGNORECASE)


def _clean(value: str) -> str:
    return re.sub(r"\s+", " ", value).strip().rstrip(".,;:")


def _extract_funding(text: str) -> str | None:
    if not text:
        return None
    match = _MONEY_PATTERN.search(text)
    return _clean(match.group(0)) if match else None


def _extract_deadline(text: str) -> str | None:
    if not text:
        return None
    if _ROLLING_PATTERN.search(text):
        return "Rolling"
    match = _DEADLINE_PATTERN.search(text)
    if match:
        return _clean(match.group(1))
    for date_match in _ANY_DATE.finditer(text):
        candidate = date_match.group(0)
        if _FUTURE_YEAR.search(candidate):
            return _clean(candidate)
    return None


def _url_key(url: Any) -> str:
    parsed = urlparse(str(url))
    host = (parsed.netloc or "").lower()
    host = host[4:] if host.startswith("www.") else host
    return f"{host}{(parsed.path or '').rstrip('/')}".lower()


def _parse_deadline_date(deadline: str) -> date | None:
    if not deadline or deadline.strip().lower() in ("rolling", "not listed", "open", "ongoing", ""):
        return None
    candidates = [deadline.strip(), *(match.group(0) for match in _ANY_DATE.finditer(deadline))]
    for candidate in candidates:
        normalized = re.sub(r"(?<=\d)(st|nd|rd|th)\b", "", candidate, flags=re.IGNORECASE)
        for fmt in (
            "%B %d, %Y", "%b %d, %Y", "%Y-%m-%d", "%d %B %Y", "%d %b %Y",
            "%m/%d/%Y", "%d/%m/%Y", "%m/%d/%y", "%d/%m/%y",
        ):
            try:
                return datetime.strptime(normalized, fmt).date()
            except ValueError:
                continue
    return None


def drop_expired_opportunities(opportunities: list[Opportunity]) -> list[Opportunity]:
    """Drop clearly closed or expired opportunities; retain unclear deadlines."""
    today = date.today()
    alive: list[Opportunity] = []
    for opp in opportunities:
        status = opp.deadline.strip().lower()
        if re.search(r"\b(closed|expired|deadline passed|applications? ended)\b", status):
            continue
        d = _parse_deadline_date(opp.deadline)
        if d is None or d >= today:
            alive.append(opp)
    return alive


def _host_of(url: Any) -> str:
    host = (urlparse(str(url)).netloc or "").lower()
    return host[4:] if host.startswith("www.") else host


def enrich_opportunities(opportunities: list[Opportunity], pages: list[Any]) -> list[Opportunity]:
    """Fill in missing funding amount / deadline from the scraped source content."""
    by_key = {_url_key(page.url): page for page in pages}
    by_host: dict[str, Any] = {}
    for page in pages:
        by_host.setdefault(_host_of(page.url), page)
    enriched: list[Opportunity] = []
    for opportunity in opportunities:
        page = by_key.get(_url_key(opportunity.source_url)) or by_host.get(_host_of(opportunity.source_url))
        text = ""
        if page:
            text = " ".join(part for part in (getattr(page, "snippet", ""), getattr(page, "content", "")) if part)
        updates: dict[str, Any] = {}
        if opportunity.funding_amount == "Not listed":
            found = _extract_funding(text)
            if found:
                updates["funding_amount"] = found
        if opportunity.deadline == "Not listed":
            found = _extract_deadline(text)
            if found:
                updates["deadline"] = found
        enriched.append(opportunity.model_copy(update=updates) if updates else opportunity)
    return enriched


def select_providers(
    base: list[Opportunity], ranked: list[Opportunity]
) -> list[Opportunity]:
    """Layer AI analysis onto sources, retaining credible sources the AI omitted."""
    by_key = {_url_key(opp.source_url): opp for opp in ranked}
    by_host: dict[str, Opportunity] = {}
    for opp in ranked:
        by_host.setdefault(_host_of(opp.source_url), opp)
    selected: list[Opportunity] = []
    for opp in base:
        if _is_aggregator(opp.source_url, opp.title):
            continue
        match = by_key.get(_url_key(opp.source_url)) or by_host.get(_host_of(opp.source_url))
        if match is None:
            if _has_funding_evidence(opp):
                selected.append(opp)
            continue
        updates: dict[str, Any] = {}
        if isinstance(match.match_score, int) and match.match_score:
            updates["match_score"] = match.match_score
        for field in ("why_it_fits", "eligibility_summary"):
            value = getattr(match, field, "")
            if value and value.strip():
                updates[field] = value
        if match.concerns:
            updates["concerns"] = list(match.concerns)
        if match.funding_amount != "Not listed":
            updates["funding_amount"] = match.funding_amount
        if match.deadline != "Not listed":
            updates["deadline"] = match.deadline
        selected.append(opp.model_copy(update=updates) if updates else opp)
    return selected


def _has_funding_evidence(opportunity: Opportunity) -> bool:
    text = " ".join(
        (
            opportunity.title,
            str(opportunity.source_url),
            opportunity.eligibility_summary,
        )
    ).lower()
    return any(
        term in text
        for term in ("scholarship", "grant", "fellowship", "financial aid", "funding", "stipend")
    )


_AGGREGATOR_PARTS = (
    "portal.com", "mastersportal", "scholarshipportal", "bachelorsportal", "phdportal",
    "studyportals", "shortcoursesportal", "distancelearningportal", "abroadin.com",
    "scholarships.com", "scholarship.com", "fastweb.com", "cappex.com", "niche.com",
    "goingmerry.com", "scholarshipdb", "scholars4dev", "scholarshipaz", "scholarshippositions",
    "indeed.com", "glassdoor.com", "jooble.org", "simplyhired.com", "ziprecruiter.com",
    "monster.com", "medium.com", "wordpress.com", "blogspot.com", "quora.com", "youtube.com",
    "wemakescholars.com",
    "computerscience.org",
    "timesconsultant.com",
    "tiktok.com", "facebook.com", "instagram.com", "linkedin.com", "reddit.com",
    "pinterest.com", "twitter.com", "x.com", "wikipedia.org", "wikihow.com",
)


_GENERIC_SCHOLARSHIP_TITLES = (
    "top scholarships", "best scholarships", "scholarships list",
    "study scholarships in", "scholarships for students", "scholarships for pakistani",
)


def _is_aggregator(url: Any, title: str = "") -> bool:
    text = str(url).lower()
    if any(part in text for part in _AGGREGATOR_PARTS):
        return True
    parsed = urlparse(text)
    path = parsed.path or ""
    if "/search" in path and "scholarship" in path:
        return True
    if "/list-of-" in path or "/list_of" in path:
        return True
    host = parsed.netloc.removeprefix("www.")
    institutional = any(marker in host for marker in (".edu", ".gov", ".ac."))
    if not institutional and any(phrase in title.lower() for phrase in _GENERIC_SCHOLARSHIP_TITLES):
        return True
    return False


def filter_direct_providers(opportunities: list[Opportunity]) -> list[Opportunity]:
    """Heuristic fallback: drop obvious aggregators / boards / listing pages."""
    return [opp for opp in opportunities if not _is_aggregator(opp.source_url, opp.title)]


def opportunities_from_sources(profile: UserProfile, pages: list[Any]) -> list[Opportunity]:
    opportunities: list[Opportunity] = []
    for index, page in enumerate(pages[:15]):
        hostname = urlparse(str(page.url)).hostname or "Funding provider"
        organization = hostname.removeprefix("www.").lower()
        summary_source = page.snippet or page.content[:260]
        eligibility_summary = (
            summary_source.strip()
            if summary_source.strip()
            else "Review the provider page for eligibility requirements, deadlines, award amount, and application rules."
        )
        try:
            opportunities.append(
                Opportunity(
                    title=page.title or f"Funding opportunity from {organization}",
                    organization=organization,
                    source_url=page.url,
                    deadline="Not listed",
                    funding_amount="Not listed",
                    eligibility_region="Not listed",
                    match_score=max(55, 82 - (index * 5)),
                    eligibility_summary=eligibility_summary[:500],
                    why_it_fits=(
                        "This is a real web result returned for the submitted origin, target degree, field, and funding search context. "
                        "Open the source to verify exact fit before applying."
                    ),
                    concerns=[
                        "The source is relevant to the search, but deadline, amount, and eligibility must be verified on the provider page."
                    ],
                )
            )
        except ValueError:
            continue
    return opportunities


def result_status(result: ResearchResult) -> str:
    message = f"Live research: found {len(result.opportunities)} opportunities for {result.profile.field_of_study}."
    if result.errors:
        message += " Showing real source results; verify details on provider websites."
    return message


def history_records() -> list[dict[str, Any]]:
    records = [
        record
        for record in STORE.recent_records(limit=100)
        if not is_demo_history_record(record.source_url, record.opportunity_title)
    ]
    return [record.model_dump(mode="json") for record in _top_result_per_session(records)[-20:]]


def search_history_records(query: str) -> list[dict[str, Any]]:
    records = [
        record
        for record in STORE.search_records(query, limit=50)
        if not is_demo_history_record(record.source_url, record.opportunity_title)
    ]
    return [record.model_dump(mode="json") for record in _top_result_per_session(records)[-50:]]


def _top_result_per_session(records: list[Any]) -> list[Any]:
    """Return one highest-scoring search result per session, preserving session order."""
    top_by_session: dict[str, Any] = {}
    order: list[str] = []
    for record in records:
        if record.session_id not in top_by_session:
            top_by_session[record.session_id] = record
            order.append(record.session_id)
        elif record.match_score > top_by_session[record.session_id].match_score:
            top_by_session[record.session_id] = record
    return [top_by_session[session_id] for session_id in order]


def is_demo_history_record(source_url: str, title: str) -> bool:
    text = f"{source_url} {title}".lower()
    parsed = urlparse(source_url)
    host = parsed.netloc.lower()
    demo_hosts = ("example.org", "example.com", "example.edu", "demo.", "localhost")
    return "demo" in text or any(part in host for part in demo_hosts)


def config_status() -> dict[str, Any]:
    missing: list[str] = []
    if not OLOSTEP.enabled:
        missing.append("OLOSTEP_API_KEY")
    if not RANKER.enabled:
        missing.append("HF_TOKEN")
    if not STORE.enabled:
        missing.extend(["HF_TOKEN", "HF_DATASET_REPO"])
    return {
        "live_research_enabled": OLOSTEP.enabled and RANKER.enabled,
        "dataset_storage_enabled": STORE.enabled,
        "missing": missing,
    }


FRONTEND_HTML = r"""
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <title>ScholarScope</title>
  <link rel="icon" href="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 36 32'%3E%3Cdefs%3E%3ClinearGradient id='g' x1='0' y1='0' x2='1' y2='1'%3E%3Cstop offset='0' stop-color='%2314b8a6'/%3E%3Cstop offset='.55' stop-color='%23059669'/%3E%3Cstop offset='1' stop-color='%2316a34a'/%3E%3C/linearGradient%3E%3C/defs%3E%3Crect width='36' height='32' rx='7' fill='url(%23g)'/%3E%3Cpath d='M18 5L33 12L18 19L3 12Z' fill='white'/%3E%3Cpath d='M7 15V20.5C7 23.5 12 25 18 25 24 25 29 23.5 29 20.5V15' stroke='white' stroke-width='2.6' stroke-linecap='round' fill='none'/%3E%3Cpath d='M33 12V18' stroke='white' stroke-width='2' stroke-linecap='round'/%3E%3Ccircle cx='33' cy='20' r='2' fill='white'/%3E%3C/svg%3E" />
  <style>
    :root {
      --bg: #f4f6fb;
      --ink: #0f172a;
      --muted: #64748b;
      --faint: #94a3b8;
      --line: #e4e8f0;
      --panel: #ffffff;
      --panel-soft: #f8fafc;
      --accent: #059669;
      --accent-dark: #047857;
      --accent-soft: #ecfdf5;
      --teal: #0d9488;
      --teal-soft: #ccfbf1;
      --green: #16a34a;
      --green-soft: #dcfce7;
      --rose: #e11d48;
      --amber: #b45309;
      --amber-soft: #fef3c7;
      --shadow: 0 20px 50px -20px rgba(15, 23, 42, .25);
      --shadow-sm: 0 6px 18px -8px rgba(15, 23, 42, .18);
      --radius: 16px;
      --ease: cubic-bezier(.2, .8, .2, 1);
    }
    * { box-sizing: border-box; }
    html, body { height: 100%; max-width: 100%; }
    body {
      margin: 0;
      overflow: hidden;
      color: var(--ink);
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background:
        radial-gradient(1100px 540px at 12% -8%, #d1fae5 0%, transparent 60%),
        radial-gradient(900px 520px at 100% 0%, #cffafe 0%, transparent 55%),
        radial-gradient(800px 600px at 50% 120%, #fef3c7 0%, transparent 60%),
        var(--bg);
    }
    body::before {
      content: "";
      position: fixed; inset: 0; pointer-events: none; z-index: 0;
      background-image:
        linear-gradient(rgba(15,23,42,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15,23,42,.04) 1px, transparent 1px);
      background-size: 44px 44px;
      mask-image: radial-gradient(circle at 50% 30%, #000, transparent 80%);
    }
    a { color: var(--accent); font-weight: 700; text-decoration: none; }
    a:hover { text-decoration: underline; }
    button, input, select, textarea { font: inherit; color: inherit; }
    button {
      min-height: 42px;
      border: 1px solid var(--line);
      border-radius: 10px;
      background: #fff;
      cursor: pointer;
      padding: 9px 14px;
      font-weight: 700;
      transition: transform .16s var(--ease), box-shadow .16s var(--ease), background .16s var(--ease), border-color .16s var(--ease), color .16s var(--ease);
    }
    button:hover:not(:disabled):not(.primary) { transform: translateY(-1px); box-shadow: var(--shadow-sm); }
    button.primary:hover:not(:disabled) { transform: translateY(-1px); }
    button:active:not(:disabled) { transform: translateY(0); }
    button.primary {
      background: linear-gradient(135deg, var(--accent), #0d9488);
      border-color: transparent; color: #fff;
    }
    button.primary:hover:not(:disabled) { filter: brightness(1.05); }
    button.ghost { background: transparent; border-color: transparent; color: var(--muted); }
    button.ghost:hover:not(:disabled) { background: var(--panel-soft); color: var(--ink); }
    button.chip {
      min-height: 34px; padding: 7px 12px; border-radius: 999px;
      background: #fff; border-color: var(--line); color: var(--muted);
      font-size: 12.5px; font-weight: 700;
    }
    button.chip:hover:not(:disabled) { color: var(--accent); border-color: var(--accent); }
    button:disabled { cursor: not-allowed; opacity: .55; }

    .field { display: grid; gap: 6px; }
    .field > span { color: var(--muted); font-size: 11.5px; font-weight: 800; letter-spacing: .03em; text-transform: uppercase; }
    fieldset.field { border: 0; padding: 0; margin: 0; }
    .checkgroup { display: flex; flex-wrap: wrap; gap: 7px; }
    .check { position: relative; display: inline-block; }
    .check input { position: absolute; opacity: 0; inset: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
    .check > span {
      display: inline-block; padding: 8px 13px; border-radius: 999px;
      border: 1px solid var(--line); background: #fff; color: var(--muted);
      font-size: 12.5px; font-weight: 700; cursor: pointer; user-select: none;
      transition: border-color .16s var(--ease), background .16s var(--ease), color .16s var(--ease);
    }
    .check:hover > span { border-color: rgba(5,150,105,.5); color: var(--ink); }
    .check input:checked + span { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-dark); }
    .check input:focus-visible + span { box-shadow: 0 0 0 3px rgba(5,150,105,.16); }
    input, select, textarea {
      width: 100%; border: 1px solid var(--line); border-radius: 10px;
      background: #fff; padding: 10px 12px; outline: none; font-size: 14px;
      transition: border-color .16s var(--ease), box-shadow .16s var(--ease);
    }
    input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(5,150,105,.18); }
    textarea { min-height: 52px; resize: none; }

    .app { position: relative; z-index: 1; height: 100vh; height: 100dvh; min-width: 0; display: grid; grid-template-rows: auto 1fr; gap: 12px; padding: 12px; max-width: 1480px; margin: 0 auto; }

    /* Top bar */
    .topbar {
      display: flex; align-items: center; gap: 14px;
      padding: 10px 14px;
      background: rgba(255,255,255,.72);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      backdrop-filter: blur(14px);
      box-shadow: var(--shadow-sm);
    }
    .brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
    .logo {
      width: 44px; height: 44px; border-radius: 13px; flex: 0 0 auto;
      display: grid; place-items: center;
      background: linear-gradient(135deg, #14b8a6, #059669 55%, #16a34a);
      box-shadow: 0 10px 22px -8px rgba(5, 150, 105, .6);
    }
    .logo svg { width: 26px; height: 26px; display: block; }
    .brand h1 { margin: 0; font-size: 18px; letter-spacing: -.02em; line-height: 1.1; }
    .brand p { margin: 0; color: var(--muted); font-size: 12px; font-weight: 600; }
    .topbar-spacer { flex: 1 1 auto; }
    .status-pill {
      display: inline-flex; align-items: center; gap: 8px;
      max-width: 420px;
      padding: 8px 13px; border-radius: 999px;
      background: var(--panel-soft); border: 1px solid var(--line);
      color: var(--muted); font-size: 12.5px; font-weight: 700;
      white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    }
    .status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--faint); flex: 0 0 auto; }
    .status-pill.ok { color: #15803d; background: #f0fdf4; border-color: #bbf7d0; }
    .status-pill.ok .status-dot { background: var(--green); box-shadow: 0 0 0 4px var(--green-soft); }
    .status-pill.live { color: #0f766e; background: #f0fdfa; border-color: #99f6e4; }
    .status-pill.live .status-dot { background: var(--teal); box-shadow: 0 0 0 4px var(--teal-soft); animation: pulse 1.6s ease-in-out infinite; }
    .status-pill.error { color: #be123c; background: #fff1f2; border-color: #fecdd3; }
    .status-pill.error .status-dot { background: var(--rose); box-shadow: 0 0 0 4px #ffe4e6; }
    .iconbtn {
      position: relative; min-height: 40px; padding: 0 14px; border-radius: 10px;
      display: inline-flex; align-items: center; gap: 8px; font-size: 13px;
    }
    .badge {
      position: absolute; top: -6px; right: -6px; min-width: 18px; height: 18px; padding: 0 5px;
      border-radius: 999px; background: var(--accent); color: #fff; font-size: 11px; font-weight: 800;
      display: grid; place-items: center; border: 2px solid #fff;
    }
    .badge[data-count="0"] { display: none; }

    /* Main */
    main.workspace { display: grid; grid-template-columns: minmax(340px, 390px) minmax(0, 1fr); gap: 12px; min-width: 0; min-height: 0; }

    .panel {
      background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
      box-shadow: var(--shadow-sm); display: flex; flex-direction: column; min-width: 0; min-height: 0;
    }
    .panel-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--line); }
    .panel-head h2 { margin: 0; font-size: 15px; letter-spacing: -.01em; }
    .panel-head .sub { color: var(--muted); font-size: 12px; font-weight: 600; }

    /* Form panel */
    .form-body { padding: 14px 16px; overflow: auto; min-width: 0; display: flex; flex-direction: column; gap: 12px; }
    .form-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px; min-width: 0; }
    .full { grid-column: 1 / -1; }
    .collapsible { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--panel-soft); }
    .collapsible > summary {
      list-style: none; cursor: pointer; padding: 11px 14px;
      display: flex; align-items: center; justify-content: space-between;
      font-size: 12.5px; font-weight: 800; color: var(--muted); letter-spacing: .03em; text-transform: uppercase;
    }
    .collapsible > summary::-webkit-details-marker { display: none; }
    .collapsible > summary .chev { transition: transform .2s var(--ease); }
    .collapsible[open] > summary .chev { transform: rotate(180deg); }
    .collapsible-body { padding: 12px 14px 14px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; border-top: 1px solid var(--line); }
    .chips { display: flex; flex-wrap: wrap; gap: 7px; }
    .actions { display: grid; grid-template-columns: 1fr auto; gap: 8px; margin-top: 2px; }
    .actions .primary { font-size: 14.5px; }

    /* Results panel */
    .results-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
    .count { color: var(--muted); font-size: 12.5px; font-weight: 700; }
    .progress { height: 4px; background: var(--line); border-radius: 999px; overflow: hidden; position: relative; }
    .progress > div { width: 0%; height: 100%; background: linear-gradient(90deg, var(--accent), var(--teal)); transition: width .15s linear; }
    .progress-time { position: absolute; right: 0; top: -18px; font-size: 11px; color: var(--muted); font-weight: 600; font-variant-numeric: tabular-nums; }
    .results-body { padding: 14px 16px 18px; overflow: auto; min-height: 0; }
    .welcome {
      height: 100%; min-height: 320px; display: grid; place-items: center; text-align: center; gap: 6px;
      color: var(--muted); padding: 30px;
    }
    .welcome .glow {
      width: 74px; height: 74px; border-radius: 22px; margin-bottom: 6px;
      display: grid; place-items: center; font-size: 34px;
      background: linear-gradient(135deg, #ecfdf5, #cffafe); border: 1px solid var(--line);
    }
    .welcome h3 { margin: 0; color: var(--ink); font-size: 19px; letter-spacing: -.02em; }
    .welcome p { margin: 0; max-width: 420px; font-size: 13.5px; line-height: 1.5; }
    .empty { padding: 18px; text-align: center; color: var(--muted); font-size: 13.5px; border: 1px dashed var(--line); border-radius: 12px; background: #fff; }
    .loading {
      position: relative; overflow: hidden; border-radius: 14px; min-height: 200px; padding: 18px;
      color: var(--muted); background: #fff; border: 1px solid var(--line);
    }
    .loading::after {
      content: ""; position: absolute; inset: 0; transform: translateX(-100%);
      background: linear-gradient(90deg, transparent, rgba(5,150,105,.09), transparent);
      animation: shimmer 1.2s linear infinite;
    }
    .cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; align-content: start; }
    .opportunity-card {
      position: relative; padding: 15px; display: grid; gap: 9px; align-content: start;
      border: 1px solid var(--line); border-radius: 14px; background: #fff;
      transition: transform .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
      animation: cardIn .4s var(--ease) both;
    }
    .opportunity-card::before { content: ""; position: absolute; left: 0; top: 14px; bottom: 14px; width: 3px; border-radius: 3px; background: linear-gradient(var(--accent), #0d9488); opacity: .85; }
    .opportunity-card:hover, .opportunity-card.selected { transform: translateY(-3px); border-color: rgba(5,150,105,.45); box-shadow: var(--shadow-sm); }
    .opportunity-card h3 { margin: 0; font-size: 15.5px; line-height: 1.3; letter-spacing: -.01em; padding-left: 8px; overflow-wrap: anywhere; }
    .tag-row { display: flex; flex-wrap: wrap; gap: 6px; padding-left: 8px; }
    .score { border-radius: 999px; padding: 3px 9px; font-size: 11.5px; font-weight: 900; background: var(--teal-soft); color: #115e59; }
    .score.high { background: var(--accent-soft); color: var(--accent-dark); }
    .meta { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.45; padding-left: 8px; overflow-wrap: anywhere; }
    .card-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 2px; padding-left: 8px; }
    .card-foot button { min-height: 34px; padding: 7px 12px; font-size: 12.5px; border-radius: 9px; }
    .opportunity-card h3 a { color: inherit; text-decoration: none; }
    .opportunity-card h3 a:hover { color: var(--accent); }
    .card-foot .visit {
      display: inline-flex; align-items: center; gap: 4px; min-height: 34px; padding: 7px 14px;
      border-radius: 9px; font-size: 12.5px; font-weight: 800;
      background: var(--accent-soft); color: var(--accent-dark); border: 1px solid var(--accent);
      transition: background .16s var(--ease), color .16s var(--ease);
    }
    .card-foot .visit:hover { background: var(--accent); color: #fff; text-decoration: none; }

    /* Slide-over */
    .sidenav { position: fixed; inset: 0; z-index: 30; display: none; }
    .sidenav.open { display: block; }
    .sidenav-backdrop { position: absolute; inset: 0; background: rgba(9, 16, 29, .45); backdrop-filter: blur(2px); animation: fade .2s ease; }
    .sidenav-card {
      position: absolute; right: 0; top: 0; bottom: 0; width: min(400px, 100%);
      background: #fff; border-left: 1px solid var(--line); box-shadow: var(--shadow);
      display: flex; flex-direction: column; animation: slideIn .26s var(--ease) both;
    }
    .sidenav-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; border-bottom: 1px solid var(--line); }
    .search-box { padding: 10px 14px; border-bottom: 1px solid var(--line); }
    .search-box input { padding: 9px 12px; font-size: 13px; }
    .tabs { display: flex; gap: 4px; padding: 10px 12px 0; }
    .tabs button { flex: 1; min-height: 38px; border-radius: 10px 10px 0 0; border: 1px solid transparent; background: transparent; color: var(--muted); font-size: 13px; }
    .tabs button.active { background: #fff; color: var(--ink); border-color: var(--line); border-bottom-color: #fff; box-shadow: 0 -2px 6px -4px rgba(15,23,42,.12); }
    .tab-panels { flex: 1; overflow: auto; padding: 12px; }
    .tab-panel[hidden] { display: none; }
    .list { display: grid; gap: 9px; }
    .list-item { border: 1px solid var(--line); border-radius: 12px; padding: 11px 12px; background: #fff; transition: border-color .16s var(--ease), transform .16s var(--ease); }
    .list-item:hover { border-color: rgba(5,150,105,.4); transform: translateX(2px); }
    .list-item strong { display: block; font-size: 13.5px; line-height: 1.35; margin-bottom: 3px; }
    .list-item .meta { padding: 0; }
    .history-button { width: 100%; text-align: left; background: #fff; }

    /* Drawer (details) */
    .drawer { position: fixed; inset: 0; z-index: 40; display: none; place-items: center; padding: 18px; background: rgba(9,16,29,.5); backdrop-filter: blur(2px); }
    .drawer.open { display: grid; }
    .drawer-card { width: min(640px, 100%); max-height: 88vh; overflow: auto; background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); animation: popIn .24s var(--ease) both; }
    .drawer-top { position: sticky; top: 0; background: #fff; display: flex; justify-content: space-between; gap: 12px; align-items: start; padding: 18px 20px 12px; border-bottom: 1px solid var(--line); }
    .drawer-body { padding: 16px 20px 22px; display: grid; gap: 12px; }
    .drawer-body h2 { margin: 0; font-size: 19px; letter-spacing: -.02em; }
    .detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
    .fact { border: 1px solid var(--line); border-radius: 11px; padding: 10px 11px; background: var(--panel-soft); }
    .fact strong { display: block; font-size: 10.5px; color: var(--muted); margin-bottom: 3px; text-transform: uppercase; letter-spacing: .04em; }
    .drawer-body p { margin: 0; line-height: 1.5; font-size: 13.5px; }
    .drawer-body ul { margin: 0; padding-left: 18px; line-height: 1.5; font-size: 13.5px; }
    .x-btn { min-height: 36px; min-width: 36px; padding: 0; border-radius: 10px; font-size: 16px; }

    /* Warning banner (slim, non-blocking) */
    .warn-banner { display: none; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 12px; background: var(--amber-soft); border: 1px solid #fcd34d; color: #78350f; font-size: 12.5px; font-weight: 700; }
    .warn-banner.show { display: flex; }
    .warn-banner button { min-height: 32px; padding: 5px 10px; font-size: 12px; border-radius: 8px; background: #fff; border-color: #fcd34d; color: #78350f; }

    @keyframes pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.25); } }
    @keyframes fade { from { opacity: 0; } to { opacity: 1; } }
    @keyframes cardIn { from { opacity: 0; transform: translateY(10px) scale(.985); } to { opacity: 1; transform: none; } }
    @keyframes slideIn { from { transform: translateX(100%); } to { transform: none; } }
    @keyframes popIn { from { opacity: 0; transform: translateY(8px) scale(.98); } to { opacity: 1; transform: none; } }
    @keyframes shimmer { to { transform: translateX(100%); } }
    @media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; } }

    @media (max-width: 980px) {
      body { overflow: auto; }
      .app { height: auto; min-height: 100vh; min-height: 100dvh; }
      main.workspace { grid-template-columns: 1fr; }
      .results-body { min-height: 360px; }
      .form-grid, .collapsible-body { grid-template-columns: 1fr; }
    }

    @media (max-width: 640px) {
      .app { gap: 8px; padding: 8px; }
      .topbar {
        display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px;
        padding: 9px 10px;
      }
      .topbar-spacer { display: none; }
      .brand { grid-column: 1; grid-row: 1; }
      .brand p { display: none; }
      .logo { width: 40px; height: 40px; border-radius: 11px; }
      .status-pill {
        grid-column: 1 / -1; grid-row: 2; width: 100%; max-width: none;
        justify-content: center; padding: 7px 10px;
      }
      #open-history { grid-column: 2; grid-row: 1; min-height: 44px; }
      .panel-head { padding: 12px 14px; }
      .form-body, .results-body { padding-left: 14px; padding-right: 14px; }
      .actions { grid-template-columns: minmax(0, 1fr) minmax(0, .45fr); }
      .actions button { width: 100%; min-width: 0; padding-left: 8px; padding-right: 8px; }
      .chips { gap: 6px; }
      button.chip { flex: 1 1 auto; min-height: 38px; }
      .cards { grid-template-columns: minmax(0, 1fr); }
      .card-foot { flex-wrap: wrap; align-items: stretch; }
      .card-foot button, .card-foot .visit { flex: 1 1 120px; justify-content: center; text-align: center; }
      .welcome { min-height: 260px; padding: 24px 14px; }
      .drawer { align-items: end; padding: 0; }
      .drawer-card { width: 100%; max-height: 92dvh; border-radius: 18px 18px 0 0; border-bottom: 0; }
      .drawer-top { padding: 14px 16px 10px; }
      .drawer-body { padding: 14px 16px 20px; }
      .detail-grid { grid-template-columns: 1fr; }
      .sidenav-card { width: 100%; border-left: 0; }
      .warn-banner { align-items: flex-start; flex-wrap: wrap; }
      .warn-banner button { margin-left: auto; }
    }

    @media (max-width: 380px) {
      .brand h1 { font-size: 16px; }
      #open-history { padding: 0 9px; }
      .panel-head .sub { display: none; }
      .actions { grid-template-columns: 1fr; }
      .actions button { min-height: 44px; }
    }

    @media (hover: none), (pointer: coarse) {
      button:hover:not(:disabled), .opportunity-card:hover, .list-item:hover { transform: none; }
    }
  </style>
</head>
<body>
  <div class="app">
    <header class="topbar">
      <div class="brand">
        <div class="logo" aria-hidden="true">
          <svg viewBox="0 0 36 32" fill="none" xmlns="http://www.w3.org/2000/svg">
            <path d="M18 5 L33 12 L18 19 L3 12 Z" fill="#fff"/>
            <path d="M7 15 V20.5 C7 23.5 12 25 18 25 C24 25 29 23.5 29 20.5 V15" stroke="#fff" stroke-width="2.6" stroke-linecap="round" stroke-linejoin="round"/>
            <path d="M33 12 V18" stroke="#fff" stroke-width="2" stroke-linecap="round"/>
            <circle cx="33" cy="20" r="2" fill="#fff"/>
          </svg>
        </div>
        <div>
          <h1>ScholarScope</h1>
          <p>AI funding research</p>
        </div>
      </div>
      <div class="topbar-spacer"></div>
      <div id="status" class="status-pill"><span class="status-dot"></span><span id="status-text">Ready</span></div>
      <button class="iconbtn ghost" id="open-history" type="button" aria-label="Research history">History</button>
    </header>

    <div id="warn-banner" class="warn-banner">
      <span id="warn-text"></span>
      <button type="button" id="warn-close">Dismiss</button>
    </div>

    <main class="workspace">
      <section class="panel" aria-label="Research profile">
        <div class="panel-head">
          <div><h2>Research Profile</h2></div>
          <span class="sub">Quick start</span>
        </div>
        <form id="profile-form" class="form-body">
          <div class="form-grid">
            <label class="field"><span>Applicant origin</span><input name="origin" value="Pakistan" placeholder="Country or region you are from" required minlength="2"></label>
            <label class="field"><span>Applying for</span>
              <select name="applying_for">
                <option>Undergraduate degree</option>
                <option selected>Master's degree</option>
                <option>PhD</option>
                <option>Postdoctoral research</option>
                <option>Research project</option>
              </select>
            </label>
            <label class="field full"><span>Field of study</span><input name="field_of_study" value="Computer science or data science" required></label>
            <label class="field full"><span>Preferences</span><input name="preferences" value="Fully funded and open to international applicants"></label>
          </div>

          <div class="chips" aria-label="Example profiles">
            <button class="chip" type="button" data-example="ai-pakistan">Pakistan · AI Master's</button>
            <button class="chip" type="button" data-example="health-kenya">Kenya · Public Health Postdoc</button>
            <button class="chip" type="button" data-example="cs-canada">Canada · CS PhD</button>
          </div>

          <div class="actions">
            <button id="research-button" class="primary" type="submit">Research Opportunities</button>
            <button id="clear-button" class="ghost" type="button">Clear</button>
          </div>
        </form>
      </section>

      <section class="panel" aria-label="Results">
        <div class="panel-head">
          <div class="results-head">
            <h2>Ranked Opportunities</h2>
            <span id="count" class="count"></span>
          </div>
        </div>
        <div class="progress" aria-hidden="true"><div id="progress-bar"></div><span id="progress-time" class="progress-time"></span></div>
        <div id="results" class="results-body"></div>
      </section>
    </main>
  </div>

  <!-- Slide-over for History -->
  <aside id="sidenav" class="sidenav" aria-hidden="true">
    <div class="sidenav-backdrop" data-close-sidenav></div>
    <div class="sidenav-card">
      <div class="sidenav-head">
        <strong>History</strong>
        <button class="ghost x-btn" type="button" data-close-sidenav aria-label="Close">&#10005;</button>
      </div>
      <div class="search-box">
        <input id="history-search" type="search" placeholder="Search history &mdash; title, field, origin, org" autocomplete="off" />
      </div>
      <div class="tab-panels">
        <div class="tab-panel">
          <div id="history-list" class="list"><div class="empty">Past research will appear here.</div></div>
        </div>
      </div>
    </div>
  </aside>

  <!-- Detail drawer -->
  <div id="drawer" class="drawer" role="dialog" aria-modal="true" aria-labelledby="drawer-title">
    <div class="drawer-card">
      <div class="drawer-top">
        <h2 id="drawer-title">Opportunity details</h2>
        <button class="ghost x-btn" type="button" id="drawer-close" aria-label="Close details">&#10005;</button>
      </div>
      <div id="drawer-content" class="drawer-body"></div>
    </div>
  </div>

  <script>
    const form = document.querySelector("#profile-form");
    const button = document.querySelector("#research-button");
    const clearButton = document.querySelector("#clear-button");
    const exampleButtons = document.querySelectorAll("[data-example]");
    const statusEl = document.querySelector("#status");
    const statusText = document.querySelector("#status-text");
    const progressBar = document.querySelector("#progress-bar");
    const resultsEl = document.querySelector("#results");
    const countEl = document.querySelector("#count");
    const historyList = document.querySelector("#history-list");
    const drawer = document.querySelector("#drawer");
    const drawerContent = document.querySelector("#drawer-content");
    const drawerClose = document.querySelector("#drawer-close");
    const sidenav = document.querySelector("#sidenav");
    const warnBanner = document.querySelector("#warn-banner");
    const warnText = document.querySelector("#warn-text");
    const warnClose = document.querySelector("#warn-close");

    let currentResult = null;
    let selectedTitle = null;
    let statusTimers = [];
    let apiReady = null;

    const EXAMPLE_PROFILES = {
      "ai-pakistan": { origin: "Pakistan", applying_for: "Master's degree", field_of_study: "Artificial intelligence", preferences: "Fully funded, responsible AI, international applicants" },
      "health-kenya": { origin: "Kenya", applying_for: "Postdoctoral research", field_of_study: "Public health", preferences: "Implementation research and international applicants" },
      "cs-canada": { origin: "Canada", applying_for: "PhD", field_of_study: "Computer science", preferences: "AI safety, systems, and human-centered computing" }
    };

    const escapeHtml = (v) => String(v ?? "").replace(/[&<>"']/g, (c) => ({"&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#39;"}[c]));

    function setStatus(message, progress = null, tone = "") {
      statusText.textContent = message;
      statusEl.title = message;
      statusEl.classList.remove("ok", "live", "error");
      if (tone) statusEl.classList.add(tone);
      if (progress !== null) progressBar.style.width = `${progress}%`;
    }
    function clearStatusTimers() { statusTimers.forEach((t) => clearInterval(t)); statusTimers = []; }
    function scheduleStatus(m, p, d, tone) { statusTimers.push(setTimeout(() => setStatus(m, p, tone), d)); }
    function readyStatus() {
      if (apiReady) setStatus("Ready", 0, "ok");
      else if (apiReady === false) setStatus("Offline", 0, "error");
      else setStatus("Ready", 0);
    }

    let _searchTimer = null;
    let _searchStart = 0;
    const progressTime = document.querySelector("#progress-time");
    function startSearchTimer() {
      _searchStart = Date.now();
      clearStatusTimers();
      _searchTimer = setInterval(() => {
        const elapsed = ((Date.now() - _searchStart) / 1000).toFixed(1);
        const pct = Math.min(95, Math.round((Date.now() - _searchStart) / 600 * 100));
        progressBar.style.width = `${pct}%`;
        progressTime.textContent = `${elapsed}s`;
        let phase = "Searching\u2026";
        if (pct > 50) phase = "Scanning\u2026";
        if (pct > 78) phase = "Ranking\u2026";
        statusText.textContent = phase;
        statusEl.title = `${phase} (${elapsed}s elapsed)`;
      }, 100);
    }
    function stopSearchTimer(finalPct) {
      if (_searchTimer) { clearInterval(_searchTimer); _searchTimer = null; }
      const elapsed = ((Date.now() - _searchStart) / 1000).toFixed(1);
      progressBar.style.width = `${finalPct}%`;
      progressTime.textContent = `${elapsed}s`;
    }

    function payloadFromForm() {
      return Object.fromEntries(new FormData(form).entries());
    }
    function fillForm(values) {
      Object.entries(values).forEach(([n, v]) => {
        const f = form.elements[n];
        if (f) f.value = v;
      });
    }

    function renderWelcome() {
      resultsEl.innerHTML = `
        <div class="welcome">
          <div class="glow">&#127891;</div>
          <h3>Find your next scholarship</h3>
          <p>Fill in your profile on the left and hit <strong>Research Opportunities</strong>. ScholarScope searches live funding sources and ranks the best matches for you.</p>
        </div>`;
      countEl.textContent = "";
    }

    function clearResearchView() {
      currentResult = null; selectedTitle = null;
      clearStatusTimers();
      if (_searchTimer) { clearInterval(_searchTimer); _searchTimer = null; }
      if (progressTime) progressTime.textContent = "";
      renderWelcome();
      readyStatus();
    }

    async function postJson(url, payload) {
      const r = await fetch(url, { method: "POST", headers: {"Content-Type": "application/json"}, body: JSON.stringify(payload) });
      if (!r.ok) throw new Error(`Request failed with ${r.status}`);
      return r.json();
    }

    clearButton.addEventListener("click", () => {
      form.reset();
      form.querySelectorAll("input, textarea").forEach((f) => { if (f.type !== "checkbox") f.value = ""; });
      clearResearchView();
    });

    exampleButtons.forEach((b) => b.addEventListener("click", () => {
      fillForm(EXAMPLE_PROFILES[b.dataset.example] || {});
      clearResearchView();
    }));

    form.addEventListener("submit", async (event) => {
      event.preventDefault();
      button.disabled = true;
      currentResult = null; selectedTitle = null;
      resultsEl.innerHTML = `<div class="loading"><strong>Researching funding sources</strong><p class="meta">Searching, reading, and ranking live opportunities.</p></div>`;
      countEl.textContent = "";
      setStatus("Searching\u2026", 2, "live");
      startSearchTimer();
      try {
        const data = await postJson("/custom/research", payloadFromForm());
        stopSearchTimer(100);
        if (!data.ok) {
          setStatus("No results", 0, "error");
          resultsEl.innerHTML = `<div class="empty">${escapeHtml(data.message)}</div>`;
          renderHistory(data.history);
          return;
        }
        currentResult = data.result;
        const opps = currentResult.opportunities || [];
        selectedTitle = opps[0]?.title ?? null;
        renderResults(opps);
        if (historySearch) historySearch.value = "";
        historyQuery = "";
        renderHistory(data.history);
        const elapsed = ((Date.now() - _searchStart) / 1000).toFixed(1);
        setStatus(`${opps.length} found \u00b7 ${elapsed}s`, 100, "ok");
        if (opps[0]) openDrawer(opps[0]);
      } catch (error) {
        stopSearchTimer(0);
        setStatus("Failed", 0, "error");
        resultsEl.innerHTML = `<div class="empty">Live research failed. No fallback results were substituted.</div>`;
      } finally {
        button.disabled = false;
      }
    });

    /* Drawer */
    drawerClose.addEventListener("click", () => drawer.classList.remove("open"));
    drawer.addEventListener("click", (e) => { if (e.target === drawer) drawer.classList.remove("open"); });
    document.addEventListener("keydown", (e) => {
      if (e.key === "Escape") { drawer.classList.remove("open"); sidenav.classList.remove("open"); }
    });

    function detailMarkup(item) {
      const concerns = (item.concerns || []).length
        ? item.concerns.map((c) => `<li>${escapeHtml(c)}</li>`).join("")
        : "<li>No concerns identified.</li>";
      return `
        <span class="score ${item.match_score >= 80 ? 'high' : ''}">${escapeHtml(item.match_score)}% match</span>
        <h2>${escapeHtml(item.title)}</h2>
        <p class="meta">${escapeHtml(item.organization)} &middot; ${escapeHtml(item.eligibility_region)}</p>
        <div class="detail-grid">
          <div class="fact"><strong>Funding</strong>${escapeHtml(item.funding_amount)}</div>
          <div class="fact"><strong>Deadline</strong>${escapeHtml(item.deadline)}</div>
          <div class="fact"><strong>Source</strong><a href="${escapeHtml(item.source_url)}" target="_blank" rel="noopener noreferrer">Open provider &nearr;</a></div>
        </div>
        <p><strong>Eligibility:</strong> ${escapeHtml(item.eligibility_summary)}</p>
        <p><strong>Why it fits:</strong> ${escapeHtml(item.why_it_fits)}</p>
        <p><strong>Concerns / missing info:</strong></p>
        <ul>${concerns}</ul>`;
    }
    function openDrawer(item) {
      if (!item) return;
      drawerContent.innerHTML = detailMarkup(item);
      drawer.classList.add("open");
    }

    function renderResults(opportunities) {
      if (!opportunities.length) {
        resultsEl.innerHTML = `<div class="empty">No opportunities found. Try broadening the profile or deadline preferences.</div>`;
        countEl.textContent = "";
        return;
      }
      countEl.textContent = `${opportunities.length} found`;
      resultsEl.innerHTML = `<div class="cards">${opportunities.map((item, i) => `
        <article class="opportunity-card ${i === 0 ? "selected" : ""}" style="animation-delay:${i * 60}ms">
          <span class="score ${item.match_score >= 80 ? 'high' : ''}">${escapeHtml(item.match_score)}% match</span>
          <h3><a href="${escapeHtml(item.source_url)}" target="_blank" rel="noopener noreferrer">${escapeHtml(item.title)}</a></h3>
          <p class="meta">${escapeHtml(item.organization)}</p>
          <p class="meta">${escapeHtml(item.funding_amount)} &middot; ${escapeHtml(item.deadline)}</p>
          <div class="card-foot">
            <button type="button" data-title="${escapeHtml(item.title)}">Details</button>
            <a class="visit" href="${escapeHtml(item.source_url)}" target="_blank" rel="noopener noreferrer">Visit &nearr;</a>
          </div>
        </article>`).join("")}</div>`;
      resultsEl.querySelectorAll("button[data-title]").forEach((b) => {
        b.addEventListener("click", () => {
          selectedTitle = b.dataset.title;
          const item = (currentResult?.opportunities || opportunities).find((o) => o.title === selectedTitle);
          resultsEl.querySelectorAll(".opportunity-card").forEach((c) => c.classList.remove("selected"));
          b.closest(".opportunity-card")?.classList.add("selected");
          openDrawer(item);
        });
      });
    }

    function renderHistory(records) {
      if (!records || !records.length) { historyList.innerHTML = `<div class="empty">${historyQuery ? "No matching records." : "Past research will appear here."}</div>`; return; }
      const visible = records.slice(-8).reverse();
      historyList.innerHTML = visible.map((record, index) => `
        <button class="list-item history-button" type="button" data-history-index="${index}">
          <strong>${escapeHtml(record.opportunity_title)}</strong>
          <p class="meta">${escapeHtml(String(record.created_at).slice(0, 19))} &middot; ${escapeHtml(record.match_score)}% match</p>
        </button>`).join("");
      historyList.querySelectorAll("[data-history-index]").forEach((b) => {
        b.addEventListener("click", () => {
          const item = opportunityFromHistory(visible[Number(b.dataset.historyIndex)]);
          currentResult = null; selectedTitle = item.title;
          renderResults([item]);
          openDrawer(item);
          sidenav.classList.remove("open");
          setStatus("Past result", 100, "ok");
        });
      });
    }

    function opportunityFromHistory(record) {
      const profile = record.user_profile || {};
      return {
        title: record.opportunity_title, organization: record.organization, source_url: record.source_url,
        deadline: record.deadline, funding_amount: record.funding_amount,
        eligibility_region: "Not listed", match_score: record.match_score,
        eligibility_summary: record.eligibility_summary, why_it_fits: record.reasoning_summary,
        concerns: ["Past research result. Verify current deadlines and eligibility on the provider website."]
      };
    }

    /* Slide-over */
    function openSidenav() {
      sidenav.classList.add("open");
      sidenav.setAttribute("aria-hidden", "false");
    }
    function closeSidenav() { sidenav.classList.remove("open"); sidenav.setAttribute("aria-hidden", "true"); }
    document.querySelector("#open-history").addEventListener("click", openSidenav);
    document.querySelectorAll("[data-close-sidenav]").forEach((el) => el.addEventListener("click", closeSidenav));

    /* Config / warning */
    function showWarn(missing) {
      if (!missing || !missing.length) return;
      warnText.textContent = "Missing keys: " + missing.join(", ") + ". Live research needs OLOSTEP_API_KEY and HF_TOKEN.";
      warnBanner.classList.add("show");
      setStatus("Offline", 0, "error");
    }
    warnClose.addEventListener("click", () => warnBanner.classList.remove("show"));

    /* History search */
    let historyQuery = "";
    let historySearchTimer = null;
    const historySearch = document.querySelector("#history-search");
    function loadHistory(query = historyQuery) {
      historyQuery = (query || "").trim();
      const url = historyQuery ? `/custom/history?q=${encodeURIComponent(historyQuery)}` : "/custom/history";
      fetch(url).then((r) => r.json()).then((d) => renderHistory(d.records)).catch(() => {});
    }
    if (historySearch) {
      historySearch.addEventListener("input", () => {
        clearTimeout(historySearchTimer);
        historySearchTimer = setTimeout(() => loadHistory(historySearch.value), 250);
      });
    }

    renderWelcome();
    fetch("/custom/config").then((r) => r.json()).then((c) => {
      apiReady = !!c.live_research_enabled;
      if (apiReady) setStatus("Ready", 0, "ok");
      else showWarn(c.missing);
    }).catch(() => { apiReady = false; setStatus("Offline", 0, "error"); });
    loadHistory("");
  </script>
</body>
</html>
"""