"""Turn every collector's output into `Doc`s.

One adapter per source file. The adapters are the only place in the runtime that
knows a collector's field names — everything downstream sees `Doc`.

Three jobs beyond renaming fields:

1. **Cross-source event dedupe.** AnchorLink and the LiveWhale campus feed are the
   same platform underneath and overlap heavily (82 of AnchorLink's 92 events are
   also in the campus feed). `collectors/events/README.md` states plainly that the
   runtime has to dedupe at read time, and this is that.
2. **Occurrence collapse.** The campus feed publishes one row per *occurrence* —
   633 rows for 534 events, one exhibition repeating 26 times. That's correct data
   and the wrong search result, so one `Doc` per event carries its occurrence dates
   in `extra["occurrences"]`.
3. **Resource attachment.** `resources.json` files hold the "how to engage" layer,
   but `study-abroad/resources.json` is 134 near-identical budget-sheet links, one
   per program. Those attach to their program; only genuinely distinct resources
   (portals, advising, forms) become documents of their own.

Deduplication that already happened *at build time* is trusted, not redone:
duplicate directory records, duplicate map pins, and academic-calendar term
duplication were all settled by the collectors. Their merge artifacts (`alt_ids`,
`aliases`) are folded into the searchable text so "Jacobs Hall" still reaches
Featheringill.
"""
from __future__ import annotations

import json
import logging
import re
from dataclasses import replace
from pathlib import Path

from . import topics
from .doc import Doc

log = logging.getLogger("foresight.kb")

# Files that exist but must never be indexed.
#   *_needs_review.json — a human queue of unresolved records, not student-facing facts
#   structure.json      — the catalog PDF's section tree; wayfinding for the collector
#   collection_meta     — provenance
#   collection_meta.json — provenance, not content
#   structure.json       — the catalog PDF's section tree; collector wayfinding
#   needs_review.json    — NOT a list of records to exclude. It annotates the 447
#     directory entities whose *location* couldn't be confidently resolved; every
#     one of them is also in directory.json with `building_slug: null` and a real
#     phone, email and website. Dropping them would cost the companion 447 real
#     offices. They're indexed, and flagged `location_unknown` so an answer can
#     give the contact without inventing a room.
NEVER_INDEXED = ("collection_meta.json", "structure.json", "needs_review.json")


def _load(root: Path, rel: str):
    f = root / rel
    if not f.exists():
        log.warning("kb: %s is missing — skipping", rel)
        return []
    try:
        return json.loads(f.read_text(encoding="utf-8"))
    except (json.JSONDecodeError, OSError) as err:
        log.error("kb: %s failed to parse (%s) — skipping", rel, err)
        return []


def _join(*parts) -> str:
    """Searchable blob from a mixed bag of strings, lists and Nones."""
    out: list[str] = []
    for p in parts:
        if not p:
            continue
        if isinstance(p, (list, tuple)):
            out.extend(str(x) for x in p if x)
        elif isinstance(p, dict):
            out.extend(f"{k} {v}" for k, v in p.items() if v)
        else:
            out.append(str(p))
    return " ".join(out)


def _domains(rec) -> tuple[str, ...]:
    return tuple(rec.get("domains") or ())


# `extra["audience"]` means three different things depending on `kind`, because three
# collectors independently chose the obvious word. Anything reading it must scope by
# kind — `topics.is_for_students` is only ever handed an event's:
#
#   event   list[str] from `topics.AUDIENCES` — who may/should attend
#           ("undergraduate", "graduate", "faculty-staff", "alumni", "public")
#   office  list[str] of who an office serves ("faculty", "staff", "student",
#           "admissions", "academics", "parents")
#   process a bare string naming a cohort ("first_year", "all", "returning")
#
# Only the event one is a controlled vocabulary with a runtime filter attached.


def _norm_title(t: str | None) -> str:
    return re.sub(r"[^a-z0-9]+", "", (t or "").lower())


# --- AnchorLink -------------------------------------------------------------
def anchorlink_orgs(root: Path) -> list[Doc]:
    docs = []
    for r in _load(root, "anchorlink/organizations.json"):
        if r.get("status") and r["status"] != "Active":
            continue
        docs.append(Doc(
            id=f"anchorlink:org:{r['id']}",
            source="anchorlink", kind="organization",
            title=r.get("name") or "",
            text=_join(r.get("name"), r.get("short_name"), r.get("summary"),
                       r.get("description"), r.get("categories"),
                       topics.labels(r.get("topics"))),
            url=r.get("url"), domains=_domains(r),
            extra={"categories": r.get("categories") or [],
                   "topics": r.get("topics") or [],
                   "audience": r.get("audience") or [],
                   "short_name": r.get("short_name")},
        ))
    return docs


# --- Events (two sources, one index) ----------------------------------------
def events(root: Path) -> list[Doc]:
    """AnchorLink events + the LiveWhale campus feed, collapsed and deduped."""
    docs: list[Doc] = []
    seen_urls: set[str] = set()
    seen_titles: set[tuple[str, str]] = set()

    # AnchorLink first — it carries host and org linkage, so it wins a collision.
    for r in _load(root, "anchorlink/events.json"):
        if r.get("is_canceled"):
            continue
        url, day = r.get("url"), r.get("start_date") or ""
        docs.append(Doc(
            id=f"anchorlink:event:{r['id']}",
            source="anchorlink", kind="event",
            title=r.get("title") or "",
            text=_join(r.get("title"), r.get("description"), r.get("categories"),
                       r.get("hosts"), r.get("location"),
                       topics.labels(r.get("topics"))),
            url=url, domains=_domains(r),
            start=r.get("start"), end=r.get("end"),
            extra={"location": r.get("location"), "hosts": r.get("hosts") or [],
                   "topics": r.get("topics") or [],
                   "audience": r.get("audience") or [],
                   "contact_email": r.get("author_email"),
                   "occurrences": [r.get("start")] if r.get("start") else []},
        ))
        if url:
            seen_urls.add(url)
        seen_titles.add((_norm_title(r.get("title")), day))

    # LiveWhale: group occurrences by event id before deduping against AnchorLink.
    by_event: dict = {}
    for r in _load(root, "events/events.json"):
        if r.get("is_canceled"):
            continue
        by_event.setdefault(r["id"], []).append(r)

    dropped = 0
    for event_id, rows in by_event.items():
        rows.sort(key=lambda r: r.get("date_iso") or "")
        first = rows[0]
        url = first.get("url")
        day = (first.get("date_iso") or "")[:10]
        if (url and url in seen_urls) or (_norm_title(first.get("title")), day) in seen_titles:
            dropped += 1
            continue
        docs.append(Doc(
            id=f"events:event:{event_id}",
            source="events", kind="event",
            title=first.get("title") or "",
            text=_join(first.get("title"), first.get("description"), first.get("tags"),
                       first.get("group_title"), first.get("location"),
                       topics.labels(first.get("topics"))),
            url=url, domains=_domains(first),
            start=first.get("date_iso"), end=rows[-1].get("end_iso") or rows[-1].get("date_iso"),
            extra={"location": first.get("location"),
                   "topics": first.get("topics") or [],
                   "audience": first.get("audience") or [],
                   # The contact published *for the event*, not the listing owner —
                   # they disagree on 437 of 447 records and this is the one to show.
                   "contact_email": first.get("contact_email"),
                   "contact_info": first.get("contact_info"),
                   "cost": first.get("cost"),
                   "has_registration": first.get("has_registration"),
                   "occurrences": [r.get("date_iso") for r in rows if r.get("date_iso")]},
        ))
    log.info("kb: events — %d docs (%d LiveWhale events deduped against AnchorLink)",
             len(docs), dropped)
    return docs


# --- Academics --------------------------------------------------------------
def courses(root: Path) -> list[Doc]:
    """Catalog course details, topped up with Kuali-only courses."""
    docs, seen = [], set()
    for r in _load(root, "academics/catalog/course_details.json"):
        cid = r.get("id")
        if not cid:
            continue
        seen.add(cid)
        tags = r.get("tags") or {}
        docs.append(Doc(
            id=f"academics:course:{cid}",
            source="academics", kind="course",
            title=f"{cid} — {r.get('title') or ''}".strip(" —"),
            text=_join(cid, r.get("title"), r.get("subject_name"), r.get("description"),
                       tags.get("axle"), tags.get("core"), tags.get("le")),
            url=(r.get("source") or {}).get("url"), domains=_domains(r),
            extra={"course_id": cid, "subject": r.get("subject"),
                   "subject_name": r.get("subject_name"),
                   "credit_hours": r.get("credit_hours"),
                   "axle": tags.get("axle") or [], "core": tags.get("core") or [],
                   "relations": r.get("relations") or {},
                   "description": r.get("description")},
        ))
    # Courses in Kuali but not in the printed catalog — identity only, no description.
    for r in _load(root, "academics/courses.json"):
        cid = r.get("course_id")
        if not cid or cid in seen:
            continue
        seen.add(cid)
        docs.append(Doc(
            id=f"academics:course:{cid}",
            source="academics", kind="course",
            title=f"{cid} — {r.get('title') or ''}".strip(" —"),
            text=_join(cid, r.get("title"), r.get("subject_name")),
            url=None, domains=_domains(r),
            extra={"course_id": cid, "subject": r.get("subject"),
                   "subject_name": r.get("subject_name")},
        ))
    return docs


def programs(root: Path) -> list[Doc]:
    """Kuali program list + the catalog's requirement trees, merged by title."""
    docs = []
    reqs_by_title = {}
    for r in _load(root, "academics/catalog/program_requirements.json"):
        reqs_by_title[_norm_title(r.get("title"))] = r

    used = set()
    for r in _load(root, "academics/programs.json"):
        key = _norm_title(r.get("title"))
        req = reqs_by_title.get(key)
        if req:
            used.add(key)
        rule_text = _join(*[g.get("rule_text") for g in (req or {}).get("requirement_groups", [])])
        docs.append(Doc(
            id=f"academics:program:{r.get('code') or key}",
            source="academics", kind="program",
            title=r.get("title") or "",
            text=_join(r.get("title"), r.get("kind"), r.get("schools"), rule_text),
            url=r.get("api_url"), domains=_domains(r),
            extra={"program_kind": r.get("kind"), "schools": r.get("schools") or [],
                   "requirements": (req or {}).get("requirement_groups"),
                   "total_hours": (req or {}).get("total_hours")},
        ))

    # Requirement trees with no Kuali counterpart (combined/joint degrees, mostly).
    for key, req in reqs_by_title.items():
        if key in used:
            continue
        rule_text = _join(*[g.get("rule_text") for g in req.get("requirement_groups", [])])
        docs.append(Doc(
            id=f"academics:program:{req.get('id')}",
            source="academics", kind="program",
            title=req.get("title") or "",
            text=_join(req.get("title"), req.get("kind"), req.get("school"), rule_text),
            url=None, domains=("vu",),
            extra={"program_kind": req.get("kind"),
                   "schools": [req.get("school")] if req.get("school") else [],
                   "requirements": req.get("requirement_groups"),
                   "total_hours": req.get("total_hours")},
        ))
    return docs


def academic_misc(root: Path) -> list[Doc]:
    docs = []
    for r in _load(root, "academics/catalog/policies.json"):
        docs.append(Doc(
            id=f"academics:policy:{r.get('id')}",
            source="academics", kind="policy",
            title=r.get("title") or "",
            text=_join(r.get("title"), r.get("summary"), r.get("content")),
            url=None, domains=_domains(r) or ("vu",),
            extra={"policy_type": r.get("type"), "rules": r.get("rules"),
                   "summary": r.get("summary"), "entry_year": r.get("entry_year")},
        ))
    for r in _load(root, "academics/calendar.json"):
        docs.append(Doc(
            id=f"academics:calendar:{r.get('occurrence_id') or r.get('id')}",
            source="academics", kind="key_date",
            title=r.get("title") or "",
            text=_join(r.get("title"), r.get("description"), r.get("terms"), r.get("tags")),
            url=r.get("url"), domains=_domains(r) or ("vu",),
            start=r.get("date_iso"), end=r.get("end_iso"),
            extra={"terms": r.get("terms") or [], "date": r.get("date")},
        ))
    for r in _load(root, "academics/catalog/liberal_ed_index.json"):
        docs.append(Doc(
            id=f"academics:liberal_ed:{r.get('curriculum')}:{r.get('category')}",
            source="academics", kind="liberal_ed",
            title=f"{r.get('curriculum')} — {r.get('category_name')}",
            # The 685 course ids stay out of the searchable text and live in extra;
            # indexing them would let one category match almost any course query.
            text=_join(r.get("curriculum"), r.get("curriculum_name"),
                       r.get("category"), r.get("category_name")),
            url=None, domains=("vu",),
            extra={"curriculum": r.get("curriculum"), "category": r.get("category"),
                   "count": r.get("count"), "courses": r.get("courses") or []},
        ))
    for r in _load(root, "academics/campuses.json"):
        docs.append(Doc(
            id=f"academics:campus:{r.get('slug')}",
            source="academics", kind="page",
            title=r.get("title") or "",
            text=_join(r.get("title"), r.get("summary"), r.get("content")),
            url=r.get("url"), domains=_domains(r),
            extra={"campus": r.get("campus")},
        ))
    return docs


# --- YES class schedule (per-term offerings) ---------------------------------
def yes_offerings(root: Path) -> list[Doc]:
    """What is actually offered each term, from the public YES class search.

    One Doc per course per term — sections stay inline in `extra` rather than
    becoming documents, or MATH 1200's twenty-five sections would fill every
    result list. The term name is in the *title* deliberately: "fall" in a query
    then title-boosts the right term's offering.

    Distinct from `academics` courses: that source is the catalog of everything
    that *exists*; this one is what actually *runs* in a term, with meeting
    times, instructors, and an enrollment snapshot (`fetched_at` says how old).
    """
    yes_root = root / "yes"
    if not yes_root.is_dir():
        return []
    docs = []
    for f in sorted(yes_root.glob("*/*.json")):
        for r in _load(root, f.relative_to(root).as_posix()):
            sections = r.get("sections") or []
            instructors = sorted({i for s in sections
                                  for i in (s.get("instructors") or [])})
            docs.append(Doc(
                id=f"yes:offering:{r.get('term_code')}:"
                   f"{(r.get('course_id') or '').replace(' ', '')}",
                source="yes", kind="class_offering",
                title=f"{r.get('course_id')} — {r.get('title') or ''} "
                      f"({r.get('term_name')})",
                text=_join(r.get("course_id"), r.get("title"),
                           r.get("subject_name"), r.get("term_name"),
                           r.get("career"), r.get("school"), r.get("description"),
                           r.get("attributes"), instructors),
                url=r.get("url"), domains=_domains(r),
                extra={"course_id": r.get("course_id"),
                       "subject": r.get("subject"),
                       "subject_name": r.get("subject_name"),
                       "term_code": r.get("term_code"),
                       "term_name": r.get("term_name"),
                       "career": r.get("career"), "school": r.get("school"),
                       "credit_hours": r.get("credit_hours"),
                       "session": r.get("session"),
                       "session_start": r.get("session_start"),
                       "session_end": r.get("session_end"),
                       "description": r.get("description"),
                       "requirements": r.get("requirements"),
                       "attributes": r.get("attributes") or [],
                       "notes": r.get("notes") or [],
                       "sections": sections,
                       "fetched_at": r.get("fetched_at")},
            ))
    return docs


# --- Places: directory + buildings ------------------------------------------
def places(root: Path) -> list[Doc]:
    """Offices and buildings. Build-time dedupe is trusted; `alt_ids` and
    `aliases` are folded into the text so merged names stay findable."""
    docs = []
    for r in _load(root, "directory/directory.json"):
        docs.append(Doc(
            id=f"directory:office:{r.get('id')}",
            source="directory", kind="office",
            title=r.get("name") or "",
            text=_join(r.get("name"), r.get("alt_ids"), r.get("kind"),
                       r.get("building_name"), r.get("audience"), r.get("evidence_quote")),
            url=r.get("website"), domains=_domains(r),
            extra={"building_slug": r.get("building_slug"),
                   "building_name": r.get("building_name"), "room": r.get("room"),
                   "address": r.get("address"), "phone": r.get("phone"),
                   "email": r.get("email"), "office_kind": r.get("kind"),
                   "audience": r.get("audience") or [], "verified": r.get("verified"),
                   # The collector refuses to guess a building rather than get one
                   # wrong. Carry that forward so an answer says "I have their
                   # email but not a room" instead of inventing one.
                   "location_unknown": not r.get("building_slug")},
        ))
    for r in _load(root, "buildings/pages.json"):
        docs.append(Doc(
            id=f"buildings:building:{r.get('slug')}",
            source="buildings", kind="building",
            title=r.get("name") or "",
            text=_join(r.get("name"), r.get("aliases"), r.get("address"), r.get("description")),
            url=r.get("website") or r.get("map_url"), domains=(),
            extra={"slug": r.get("slug"), "address": r.get("address"),
                   "lat": r.get("lat"), "lng": r.get("lng"),
                   "map_url": r.get("map_url"), "aliases": r.get("aliases") or []},
        ))
    return docs


# --- Residential ------------------------------------------------------------
def residential(root: Path) -> list[Doc]:
    docs = []
    for r in _load(root, "residential/houses.json"):
        docs.append(Doc(
            id=f"residential:house:{_norm_title(r.get('name'))}",
            source="residential", kind="house",
            title=r.get("name") or "",
            text=_join(r.get("name"), r.get("type"), r.get("description"),
                       r.get("namesake"), r.get("neighborhood"), r.get("class_years")),
            url=r.get("url"), domains=_domains(r),
            extra={"house_type": r.get("type"), "class_years": r.get("class_years") or [],
                   "room_types": r.get("room_types") or [], "location": r.get("location"),
                   "building_slug": r.get("building_slug")},
        ))
    for r in _load(root, "residential/contacts.json"):
        c = r.get("contact") or {}
        docs.append(Doc(
            id=f"residential:contact:{r.get('role')}",
            source="residential", kind="contact",
            title=(r.get("scenario") or r.get("role") or "").capitalize(),
            text=_join(r.get("role"), r.get("scenario"), c.get("office"), c.get("portal")),
            url=c.get("url"), domains=_domains(r),
            extra={"role": r.get("role"), "scenario": r.get("scenario"),
                   "phone": c.get("phone"), "email": c.get("email"),
                   "hours": c.get("hours"), "office": c.get("office")},
        ))
    for r in _load(root, "residential/processes.json"):
        docs.append(Doc(
            id=f"residential:process:{r.get('process')}",
            source="residential", kind="process",
            title=(r.get("process") or "").replace("_", " ").capitalize(),
            text=_join(r.get("process"), r.get("audience"), r.get("summary"),
                       *[s.get("description") for s in (r.get("steps") or [])]),
            url=r.get("source_url"), domains=_domains(r),
            extra={"audience": r.get("audience"), "summary": r.get("summary"),
                   "steps": r.get("steps") or [], "key_dates": r.get("key_dates")},
        ))
    for r in _load(root, "residential/policies.json"):
        docs.append(Doc(
            id=f"residential:policy:{_norm_title(r.get('title'))}",
            source="residential", kind="policy",
            title=r.get("title") or "",
            text=_join(r.get("title"), r.get("category"), r.get("summary"), r.get("detail")),
            url=r.get("source_url"), domains=_domains(r),
            extra={"category": r.get("category"), "summary": r.get("summary")},
        ))
    return docs


# --- Recreation & sports ----------------------------------------------------
def recreation(root: Path) -> list[Doc]:
    """The Rec Center, intramurals, club sports, and varsity games.

    `how_to_participate` is deliberately first in the searchable text: the whole
    point of this source is that a student asking "how do I sign up for
    intramural basketball" gets procedure, not a phone number (issue #46).
    """
    docs = []
    for r in _load(root, "recreation/programs.json"):
        docs.append(Doc(
            id=f"recreation:program:{r.get('id')}",
            source="recreation", kind=r.get("type") or "program",
            title=r.get("name") or "",
            text=_join(r.get("name"), r.get("how_to_participate"), r.get("summary"),
                       # the words students actually use ("gym", "free", "sign up"),
                       # which the source pages frequently don't contain
                       r.get("search_terms"),
                       r.get("eligibility"), r.get("exclusions"), r.get("cost_note"),
                       r.get("hours"), r.get("hours_text"), r.get("administered_by"),
                       *(r.get("sports") or []),
                       *(f"{lt.get('name')} {lt.get('description')}"
                         for lt in (r.get("league_types") or []))),
            url=r.get("url"), domains=_domains(r),
            extra={"category": r.get("category"),
                   "how_to_participate": r.get("how_to_participate"),
                   "requires_login": r.get("requires_login"),
                   "registration_url": r.get("registration_url"),
                   "cost": r.get("cost"), "eligibility": r.get("eligibility"),
                   "building_slug": r.get("building_slug"),
                   "contact": r.get("contact"), "hours_url": r.get("hours_url")},
        ))
    for r in _load(root, "recreation/club_sports.json"):
        docs.append(Doc(
            id=f"recreation:club:{r.get('id')}",
            source="recreation", kind="club_sport",
            title=f"{r.get('name')} (club sport)",
            text=_join(r.get("name"), "club sport team", r.get("summary"),
                       r.get("how_to_participate"), r.get("eligibility")),
            url=r.get("anchorlink_url") or r.get("url"), domains=_domains(r),
            extra={"category": r.get("category"),
                   "anchorlink_org_id": r.get("anchorlink_org_id"),
                   "how_to_participate": r.get("how_to_participate"),
                   "building_slug": r.get("building_slug"),
                   "contact": r.get("contact")},
        ))
    for r in _load(root, "recreation/games.json"):
        home = "home" if r.get("is_home") else "away"
        free = "free student tickets" if r.get("tickets_free_to_students") else ""
        docs.append(Doc(
            id=f"recreation:game:{r.get('id')}",
            source="recreation", kind="game",
            title=r.get("name") or "",
            text=_join(r.get("name"), r.get("sport"), home, "game",
                       r.get("location"), r.get("time_note"), free, r.get("ticket_note")),
            url=r.get("url"), domains=_domains(r),
            start=r.get("date_iso"), end=r.get("date_iso"),
            extra={"category": r.get("category"), "sport": r.get("sport"),
                   "opponent": r.get("opponent"), "is_home": r.get("is_home"),
                   "start_time": r.get("start_time"), "time_note": r.get("time_note"),
                   "location": r.get("location"), "building_slug": r.get("building_slug"),
                   "tickets_free_to_students": r.get("tickets_free_to_students"),
                   "ticket_url": r.get("ticket_url"), "ticket_note": r.get("ticket_note")},
        ))
    for r in _load(root, "recreation/calendar.json"):
        docs.append(Doc(
            id=f"recreation:im:{r.get('id')}",
            source="recreation", kind="registration_window",
            title=f"{r.get('sport')} — intramural registration",
            text=_join(r.get("sport"), "intramural registration deadline league",
                       r.get("season"), r.get("how_to_participate")),
            url=r.get("url"), domains=_domains(r),
            start=r.get("registration_opens") or r.get("date_iso"),
            end=r.get("end_iso"),
            extra={"category": r.get("category"), "sport": r.get("sport"),
                   "registration_opens": r.get("registration_opens"),
                   "registration_closes": r.get("registration_closes"),
                   "season": r.get("season"),
                   # a deadline without the procedure is a date the student
                   # can't act on — carry the how-to onto the dated record too
                   "how_to_participate": r.get("how_to_participate"),
                   "requires_login": r.get("requires_login"),
                   "registration_url": r.get("registration_url")},
        ))
    for r in _load(root, "recreation/fusion_products.json"):
        docs.append(Doc(
            id=f"recreation:class:{_norm_title(r.get('name'))}",
            source="recreation", kind="class",
            title=r.get("name") or "",
            text=_join(r.get("name"), r.get("classification"), r.get("day"),
                       r.get("time"), r.get("location")),
            url=r.get("url"), domains=_domains(r),
            extra={"classification": r.get("classification"), "day": r.get("day"),
                   "time": r.get("time"), "location": r.get("location"),
                   "cost": None, "requires_login": r.get("requires_login"),
                   "registration_url": r.get("registration_url")},
        ))
    return docs


# --- Funding ----------------------------------------------------------------
def funding(root: Path) -> list[Doc]:
    docs = []
    for r in _load(root, "funding/awards.json"):
        # An award is listed once per applicant level — Lafayette appears for
        # postgraduates and for graduate students, with different deadlines. Those
        # are distinct records, so the level belongs in the id.
        level = r.get("applicant_level") or "any"
        docs.append(Doc(
            id=f"funding:award:{_norm_title(r.get('name'))}:{level}",
            source="funding", kind="award",
            title=r.get("name") or "",
            text=_join(r.get("name"), r.get("description"), r.get("eligibility"),
                       r.get("level_label"), r.get("tier")),
            url=r.get("official_url") or r.get("source_url"), domains=_domains(r),
            extra={"eligibility": r.get("eligibility"), "tier": r.get("tier"),
                   "campus_deadline": r.get("campus_deadline"),
                   "priority_deadline": r.get("priority_deadline"),
                   "applicant_level": level, "level_label": r.get("level_label")},
        ))
    for r in _load(root, "funding/scholarships.json"):
        docs.append(Doc(
            id=f"funding:scholarship:{_norm_title(r.get('name'))}",
            source="funding", kind="award",
            title=r.get("name") or "",
            text=_join(r.get("name"), r.get("description"), r.get("award"), r.get("type")),
            url=r.get("url") or r.get("source_url"), domains=_domains(r),
            extra={"award": r.get("award"), "campus_deadline": r.get("deadline"),
                   "scholarship_type": r.get("type")},
        ))
    for r in _load(root, "funding/research_programs.json"):
        docs.append(Doc(
            id=f"funding:research:{_norm_title(r.get('name'))}",
            source="funding", kind="research_program",
            title=r.get("name") or "",
            text=_join(r.get("name"), r.get("description"), r.get("eligibility_group")),
            url=r.get("url"), domains=_domains(r),
            extra={"stipend": r.get("stipend"), "deadline": r.get("deadline"),
                   "eligibility_group": r.get("eligibility_group")},
        ))
    return docs


# --- Prose pages (immersion, study abroad, funding, residential) ------------
PAGE_FILES = [
    ("immersion/pages.json", "immersion"),
    ("study-abroad/pages.json", "study-abroad"),
    ("study-abroad/summer_pages.json", "study-abroad"),
    ("funding/pages.json", "funding"),
    ("residential/pages.json", "residential"),
    ("recreation/pages.json", "recreation"),
]


def pages(root: Path) -> list[Doc]:
    docs = []
    for rel, source in PAGE_FILES:
        for r in _load(root, rel):
            docs.append(Doc(
                id=f"{source}:page:{r.get('slug') or _norm_title(r.get('title'))}",
                source=source, kind="page",
                title=r.get("title") or "",
                text=_join(r.get("title"), r.get("summary"), r.get("content")),
                url=r.get("url"), domains=_domains(r),
                extra={"page_kind": r.get("kind"), "section": r.get("section"),
                       "summary": r.get("summary")},
            ))
    return docs


def study_abroad_programs(root: Path) -> list[Doc]:
    docs = []
    for r in _load(root, "study-abroad/programs.json"):
        stats = r.get("stats") or {}
        docs.append(Doc(
            id=f"study-abroad:program:{r.get('program_id')}",
            source="study-abroad", kind="program",
            title=r.get("name") or "",
            text=_join(r.get("name"), r.get("city"), r.get("country"),
                       r.get("overview"), stats),
            url=r.get("url"), domains=_domains(r) or ("crew", "future"),
            extra={"program_id": r.get("program_id"), "city": r.get("city"),
                   "country": r.get("country"), "stats": stats},
        ))
    return docs


# --- The "how to engage" layer ----------------------------------------------
RESOURCE_FILES = [
    ("immersion/resources.json", "immersion"),
    ("study-abroad/resources.json", "study-abroad"),
    ("funding/resources.json", "funding"),
    ("residential/resources.json", "residential"),
    ("academics/resources.json", "academics"),
    ("recreation/resources.json", "recreation"),
]


def resources(root: Path, by_id: dict[str, Doc]) -> list[Doc]:
    """Application portals, advising links, forms, class search.

    A resource whose every `found_on` is a specific program is an attachment to
    that program, not a document — `study-abroad/resources.json` is 134 copies of
    "See Budget Sheets", one per program, and indexing them would swamp search.
    """
    docs, seen_urls = [], set()
    attach: dict[str, list[dict]] = {}
    for rel, source in RESOURCE_FILES:
        for r in _load(root, rel):
            url, found_on = r.get("url"), r.get("found_on") or []
            entry = {"text": r.get("text"), "url": url, "kind": r.get("kind")}
            program_refs = [f for f in found_on if str(f).startswith("program:")]
            if program_refs and len(program_refs) == len(found_on):
                for ref in program_refs:
                    attach.setdefault(f"{source}:program:{ref.split(':', 1)[1]}", []).append(entry)
                continue
            if not url or url in seen_urls:
                continue
            seen_urls.add(url)
            docs.append(Doc(
                id=f"{source}:resource:{len(seen_urls)}",
                source=source, kind="resource",
                title=r.get("text") or url,
                text=_join(r.get("text"), r.get("kind"), found_on, source),
                url=url, domains=(),
                extra={"resource_kind": r.get("kind"), "found_on": found_on},
            ))

    # Fold program-specific resources onto their program (extras are mutable by design).
    for doc_id, entries in attach.items():
        target = by_id.get(doc_id)
        if target is not None:
            target.extra.setdefault("resources", []).extend(entries)
    return docs


# --- Entry point ------------------------------------------------------------
def load_all(root: Path) -> list[Doc]:
    docs: list[Doc] = []
    for fn in (anchorlink_orgs, events, courses, programs, academic_misc,
               yes_offerings, places, residential, recreation, funding, pages,
               study_abroad_programs):
        try:
            docs.extend(fn(root))
        except Exception:                       # one bad source shouldn't kill the app
            log.exception("kb: adapter %s failed — continuing without it", fn.__name__)

    by_id = {d.id: d for d in docs}
    try:
        docs.extend(resources(root, by_id))
    except Exception:
        log.exception("kb: resource adapter failed — continuing without it")

    # Ids must be unique — they're what a tool result cites back — but a collision
    # means the id scheme is too coarse, not that the record is redundant. Suffix
    # rather than drop, and say so, so a real duplicate shows up in the log instead
    # of silently costing the student an answer.
    seen: set[str] = set()
    out: list[Doc] = []
    collisions = 0
    for d in docs:
        if d.id in seen:
            collisions += 1
            n = 2
            while f"{d.id}#{n}" in seen:
                n += 1
            d = replace(d, id=f"{d.id}#{n}")
        seen.add(d.id)
        out.append(d)
    if collisions:
        log.warning("kb: %d documents needed an id suffix — the id scheme is too "
                    "coarse for those sources", collisions)
    return out