"""Silent Knowledge Pass — recognise everything possible BEFORE asking a single question (Phase 0).

The Advisor can say "I need 5 answers" but does not yet decide WHAT it can find out by itself. The Silent
Pass runs first: from signals that existing scanners/parsers already produce (website, repository,
documents, product data) it deterministically derives capabilities the company demonstrably HAS and
product facts that drive scope — so every recognised item shrinks the delta and removes a question.

The customer then experiences "we already recognised 11 of 17 — only these 4 remain" instead of a
question wall. This is NOT new architecture: it is one orchestration step in front of the Advisor
  Company -> Silent Intake -> Company Profile -> Hypotheses -> Delta -> Top Questions
All building blocks already exist. SIGNALS are INJECTED (the scanners produce them); the signal->capability
map is curated DATA, also injected. Pure, deterministic, no I/O. Python 3.9 compatible.
"""

from __future__ import annotations

from typing import Dict, List, Optional, Sequence, Set

from pydantic import BaseModel, Field


class IntakeSignal(BaseModel):
    """A CANONICAL signal the Silent Pass consumes. Producer-agnostic: the same `signal` may have come
    from a website, a repo, a PDF, a tender or the user — normalize_signals() unified them (see signals.py)."""

    source: str                                 # source_type: website / repository / document / product / tender / user
    signal: str                                 # CANONICAL signal id, e.g. "sbom_present"
    kind: str = "observation"                   # "observation" (I saw X) | "requirement" (someone DEMANDS X)
    confidence: float = 1.0                     # carried from the producer
    evidence: Optional[str] = None              # the artifact already in hand
    provenance: str = ""                        # where it came from (url / filename / tender clause) — audit trail
    detail: str = ""                            # free-text (kept for back-compat)


class SignalMapping(BaseModel):
    """Curated: what a signal lets us conclude. A signal yields a capability OR a product fact."""

    signal: str
    capability: Optional[str] = None            # capability the signal evidences
    relationship: str = "detected"              # detected (concrete artifact) / partial (indicative)
    evidence: Optional[str] = None              # the artifact found (already in hand -> no upload needed)
    product_fact: Optional[str] = None          # e.g. "connected_to_internet"
    fact_value: str = "true"


class DetectedCapability(BaseModel):
    capability: str
    relationship: str = "detected"
    source: str = ""                            # which signal/source detected it (audit trail)
    evidence: Optional[str] = None
    confidence: float = 1.0                     # carried from the producing signal
    provenance: str = ""                        # where the signal came from


class ProductFact(BaseModel):
    key: str
    value: str = "true"
    source: str = ""


class SilentIntakeResult(BaseModel):
    detected_capabilities: List[DetectedCapability] = Field(default_factory=list)
    product_facts: List[ProductFact] = Field(default_factory=list)
    evidence_found: List[str] = Field(default_factory=list)
    requirements_seen: List[str] = Field(default_factory=list)   # requirement-kind signals — preserved, NOT present
    summary: str = ""

    def capability_ids(self) -> List[str]:
        """The DETECTED capability ids (relationship == detected) — fed into the Advisor as already-present
        (delta-reducing, not asked). ONLY observation-kind signals reach here (requirements never become a
        present capability); a merely PARTIAL/indicative signal does NOT (see indicative_capability_ids)."""
        return sorted({d.capability for d in self.detected_capabilities if d.relationship == "detected"})

    def indicative_capability_ids(self) -> List[str]:
        """Capabilities backed only by a PARTIAL/indicative signal — they raise assumption strength but do
        NOT replace a question (the gap stays open and is still asked, just with an indication shown)."""
        return sorted({d.capability for d in self.detected_capabilities if d.relationship != "detected"})


def silent_intake(
    signals: Sequence[IntakeSignal], signal_map: Sequence[SignalMapping]
) -> SilentIntakeResult:
    """Derive capabilities + product facts from injected scanner signals (deterministic, no questions).

    Each signal is matched to curated mappings by `signal` id; a mapping contributes either a detected
    capability (+ optional evidence already in hand) or a product fact. Deduped, deterministic order.
    """
    by_signal: Dict[str, List[SignalMapping]] = {}
    for m in signal_map:
        by_signal.setdefault(m.signal, []).append(m)

    caps: Dict[str, DetectedCapability] = {}
    facts: Dict[str, ProductFact] = {}
    evidence: Set[str] = set()
    requirements: Set[str] = set()
    for s in signals:
        if s.kind != "observation":             # a requirement describes a TARGET, never the present state
            requirements.add(s.signal)          # preserved + visible, but NEVER turned into a capability
            continue
        for m in by_signal.get(s.signal, []):
            if m.capability and m.capability not in caps:
                caps[m.capability] = DetectedCapability(
                    capability=m.capability, relationship=m.relationship,
                    source="%s:%s" % (s.source, s.signal), evidence=m.evidence,
                    confidence=s.confidence, provenance=s.provenance)
                if m.evidence:
                    evidence.add(m.evidence)
            if m.product_fact:
                facts[m.product_fact] = ProductFact(key=m.product_fact, value=m.fact_value, source=s.source)

    detected = [caps[k] for k in sorted(caps)]
    product_facts = [facts[k] for k in sorted(facts)]
    requirements_seen = sorted(requirements)
    summary = (
        "Stille Vorbefüllung: %d Fähigkeit(en) automatisch erkannt, %d Produktfakt(en), %d Nachweis(e) "
        "bereits vorhanden, %d Anforderung(en) erkannt (nicht als vorhanden gewertet)."
        % (len(detected), len(product_facts), len(evidence), len(requirements_seen))
    )
    return SilentIntakeResult(
        detected_capabilities=detected, product_facts=product_facts,
        evidence_found=sorted(evidence), requirements_seen=requirements_seen, summary=summary)