from __future__ import annotations

from typing import Any, Literal, TypedDict


Completeness = Literal["complete", "partial", "missing"]
Resolution = Literal["resolved", "partial", "missing", "unsafe"]


class EvidenceSpec(TypedDict):
    availability: Literal[
        "direct-read",
        "returned-to-agent",
        "available-upstream",
        "produced-by-run",
        "visualization-derived",
        "unavailable",
    ]
    adoption: Literal[
        "explicitly-adopted",
        "explicitly-rejected",
        "not-recorded",
        "not-applicable",
    ]
    confidence: Literal["exact", "safe-association", "deterministic", "unconfirmed"]


class SourceBinding(TypedDict):
    id: str
    sourceId: str
    role: Literal["input", "basis", "constraint", "process", "output", "status"]
    selector: dict[str, Any]
    transform: dict[str, Any]
    evidence: EvidenceSpec
    resolution: Resolution


class SourceRecord(TypedDict, total=False):
    id: str
    kind: Literal[
        "database",
        "runtime-event",
        "artifact",
        "log-anchor",
        "calculation",
        "historical-fallback",
        "missing",
    ]
    label: str
    locator: dict[str, Any]
    status: str
    durationMs: int | None
    completeness: Completeness
    resultState: Literal["present", "empty", "missing", "unavailable"]
    truncated: bool
    omittedCharacters: int
    selectedValues: list[dict[str, Any]]
    rawRecord: Any


def unresolved_binding(
    binding_id: str,
    *,
    reason: str,
    role: str = "basis",
    source_id: str | None = None,
    resolution: Resolution = "missing",
    code: str | None = None,
) -> SourceBinding:
    selector = {"kind": "unresolved", "reason": reason}
    if code:
        selector["code"] = code
    return {
        "id": binding_id,
        "sourceId": source_id or f"missing:{binding_id}",
        "role": role,  # type: ignore[typeddict-item]
        "selector": selector,
        "transform": {"kind": "direct"},
        "evidence": {
            "availability": "unavailable",
            "adoption": "not-recorded",
            "confidence": "unconfirmed",
        },
        "resolution": resolution,
    }