src/case_zero/api/case_adapter.py

"""Project a generated ``CaseFile`` into the PUBLIC wire view (the same contract the
golden case uses). Deterministic: it synthesizes the display surface from the case's
own fields. Nothing from the sealed solution (culprit, true motive id, breaker chain)
is exposed; the true motive's *text* appears only as one option among the decoys.

Generated evidence renders as paper exhibits (reveal_text); richer per-type payloads
(threads, keycard tables, voicemail) and authored tags/quotes are a later enhancement.
"""

from __future__ import annotations

from ..schemas.case import CaseFile
from ..schemas.clue import Clue
from .public_view import (
    FlashbackAccount,
    PublicCase,
    PublicEvidence,
    PublicFlashback,
    PublicMotive,
    PublicSuspect,
    PublicVictim,
    StoryBeat,
    SuggestedQuestion,
    TimelineBeat,
)
from .questions import FIXED_QUESTIONS

_SCENES = ("skyline", "atrium", "interro", "seawall", "mezzanine", "desk")
_WEATHER = (
    "Rain, and a wind off the water.", "Fog thick enough to lean on.",
    "A dry cold that gets into the joints.", "Sleet against every window.",
)
_GREETS = (
    "Detective. Let's get this over with.",
    "I already told the others everything I know.",
    "Ask what you came to ask.",
    "I have nothing to hide, if that's what you think.",
)
_APPARENT = (
    "Was close enough to the victim to have a reason - and a chance.",
    "Had more to lose tonight than they're letting on.",
    "Their story has a seam in it, if you pull the right thread.",
    "Stood to gain from a death no one saw coming.",
)
_DECOY_MOTIVES = (
    "To bury a debt that was about to surface.",
    "Jealousy that had festered for years.",
    "To keep a buried secret buried.",
    "To settle an old score, finally.",
    "Fear of being exposed and ruined.",
)
_ICONS = ("photoEv", "receipt", "keycard", "compass", "phone", "cctv")
# Noir city names so CITY reads as an actual city, not the venue (the venue goes in SCENE).
_CITIES = (
    "Graymoor", "Blackport", "Ashmoor", "Harrowgate", "Duskwater", "Coldhaven",
    "Ravenreach", "Mortlake", "Greyharbor", "Thornehaven", "Mistport", "Hollowmere",
    "Saltmarsh", "Ironhaven", "Blackwater", "Fellgate",
)


def _hash(s: str) -> int:
    h = 0
    for ch in s:
        h = (h * 31 + ord(ch)) & 0x7FFFFFFF
    return h


def _clock(minute: int) -> str:
    h = (minute // 60) % 24
    m = minute % 60
    suffix = "AM" if h < 12 else "PM"
    h12 = h % 12 or 12
    return f"{h12}:{m:02d} {suffix}"


def _loc_name(case: CaseFile, loc_id: str) -> str:
    for loc in case.setting.locations:
        if loc.loc_id == loc_id:
            return loc.name
    return loc_id


def _suspect_public(case: CaseFile, idx: int) -> PublicSuspect:
    s = case.suspects[idx]
    seed = _hash(s.sus_id)
    role_word = (s.role.split()[-1] if s.role else "").strip(".,").upper()
    tag = f"THE {role_word}" if role_word else "PERSON OF INTEREST"
    quote = (s.persona_summary.split(".")[0] + ".") if s.persona_summary else "I've nothing to hide."
    gender = "female" if ((s.visual.gender if s.visual else "") or "").lower().startswith("f") else "male"
    return PublicSuspect(
        id=s.sus_id,
        name=s.name,
        role=s.role,
        age=30 + (seed % 35),
        sprite=s.sus_id,
        gender=gender,
        tag=tag[:22],
        baseline_suspicion=25 + (seed % 16),
        motive=_APPARENT[idx % len(_APPARENT)],
        alibi=s.stated_alibi.claim_text,
        quote=quote,
        greet=_GREETS[idx % len(_GREETS)],
        suggested_questions=tuple(SuggestedQuestion(id=q, q=text) for q, text in FIXED_QUESTIONS),
    )


def _evidence_public(case: CaseFile, clue: Clue, idx: int) -> PublicEvidence:
    at = next((f.at_min for f in case.facts if f.fact_id == clue.supports_fact_id and f.at_min is not None), None)
    time = _clock(at) if at is not None else _clock(case.setting.murder_window.start_min + 7 * (idx + 1))
    return PublicEvidence(
        id=clue.clue_id,
        name=clue.name.upper(),
        type=clue.discovery_method.value.upper(),
        icon=_ICONS[idx % len(_ICONS)],
        time=time,
        found=f"Recovered from {_loc_name(case, clue.discoverable_at_loc_id)}.",
        summary=clue.reveal_text,
        detail=clue.reveal_text,
    )


def _timeline(case: CaseFile) -> tuple[TimelineBeat, ...]:
    beats: list[TimelineBeat] = []
    w = case.setting.murder_window
    beats.append(TimelineBeat(time=_clock(w.start_min), label="The evening is under way; everyone is in the house.", locked=True))
    culprit = case.culprit.sus_id
    for i, clue in enumerate(case.clues):
        at = next((f.at_min for f in case.facts if f.fact_id == clue.supports_fact_id and f.at_min is not None), None)
        t = at if at is not None else w.start_min + 7 * (i + 1)
        conflict = clue.contradicts_alibi_of == culprit
        beats.append(TimelineBeat(time=_clock(t), label=clue.reveal_text[:80], ev=clue.clue_id, conflict=conflict))
    beats.append(TimelineBeat(time=_clock(case.victim.time_of_death.start_min), label=f"{case.victim.name} is killed. Time of death.", locked=True))
    beats.sort(key=lambda b: b.time)
    return tuple(beats)


def _flashback(case: CaseFile) -> PublicFlashback:
    culprit = next((s for s in case.suspects if s.sus_id == case.culprit.sus_id), case.suspects[0])
    claimed = _loc_name(case, case.culprit.alibi_lie.claimed_loc_id)
    crime = _loc_name(case, case.victim.found_at_loc_id)
    breakers = [c for c in case.clues if c.contradicts_alibi_of == culprit.sus_id][:3]
    return PublicFlashback(
        title="TWO ACCOUNTS",
        a=FlashbackAccount(
            who=f"{culprit.name} SAYS",
            scene=claimed,
            lines=(culprit.stated_alibi.claim_text, f"I was in {claimed} the whole time.", "I never went near it."),
            flags=(),
        ),
        b=FlashbackAccount(
            who="THE EVIDENCE SAYS",
            scene=crime,
            lines=tuple(c.reveal_text[:90] for c in breakers) or ("The evidence places someone at the scene.",),
            flags=tuple(range(len(breakers))),
        ),
    )


def _motives(case: CaseFile, seed: int) -> tuple[PublicMotive, ...]:
    true_text = case.culprit.true_motive.summary
    decoys = [d for d in _DECOY_MOTIVES if d.lower() != true_text.lower()]
    chosen = [PublicMotive(id="M1", text=true_text)]
    for i in range(3):
        chosen.append(PublicMotive(id=f"MD{i + 1}", text=decoys[(seed + i) % len(decoys)]))
    # stable shuffle by seed so the true option isn't always first
    rot = seed % len(chosen)
    return tuple(chosen[rot:] + chosen[:rot])


def _story_beats(case: CaseFile) -> tuple[StoryBeat, ...]:
    v = case.victim
    return (
        StoryBeat(scene="skyline", kicker=case.setting.name.upper(), title="The call", text=case.briefing),
        StoryBeat(scene="atrium", kicker="THE VICTIM", title=v.name, text=f"{v.name}, {v.role}. {v.cause_of_death}"),
        StoryBeat(scene="interro", kicker="THOSE WHO STAYED", title="Persons of interest",
                  text="Each of them had a reason to be here tonight, and a story you'll need to take apart."),
        StoryBeat(scene="seawall", kicker="YOUR CASE NOW", title="Detective",
                  text="One of them is lying to your face. Find the crack in the account and follow it down."),
    )


def casefile_to_public(case: CaseFile) -> PublicCase:
    seed = case.seed
    tod = case.victim.time_of_death.start_min
    building = case.setting.name
    room = _loc_name(case, case.victim.found_at_loc_id)
    scene = f"{building} — {room}"  # building + room; the painter keys off the room
    city = _CITIES[seed % len(_CITIES)]
    return PublicCase(
        id=case.case_id,
        city=city,
        district=building,
        title=case.title,
        tagline="Detective, your presence is required.",
        weather=_WEATHER[seed % len(_WEATHER)],
        victim=PublicVictim(name=case.victim.name, role=case.victim.role, age=40 + (seed % 30), sprite="victim", bio=case.briefing),
        scene=scene,
        tod=_clock(tod),
        found=f"Found in {scene} at {_clock(case.victim.found_at_min)}.",
        cause=case.victim.cause_of_death,
        facts=(
            ("CITY", city),
            ("VICTIM", f"{case.victim.name}"),
            ("SCENE", scene),
            ("TIME OF DEATH", _clock(tod)),
            ("CAUSE", case.victim.cause_of_death),
            ("VERDICT", "Homicide"),
        ),
        boot_lines=(
            "The phone drags you up out of half a sleep.",
            f"{case.setting.name}. A death no one saw coming.",
            f"{case.victim.name} - {case.victim.role}.",
            "They're holding the scene. It's yours now, detective.",
        ),
        story_beats=_story_beats(case),
        suspects=tuple(_suspect_public(case, i) for i in range(len(case.suspects))),
        evidence=tuple(_evidence_public(case, c, i) for i, c in enumerate(case.clues)),
        timeline=_timeline(case),
        flashback=_flashback(case),
        motives=_motives(case, seed),
    )