"""Pydantic response/request models for the Prometheus API.

Kept deliberately thin and explicit so the TypeScript types in
``dashboard/src/types`` can mirror them one-to-one.
"""

from __future__ import annotations

from pydantic import BaseModel, Field


class BBox(BaseModel):
    x1: float
    y1: float
    x2: float
    y2: float


class DetectionItem(BaseModel):
    species: str
    class_id: int
    confidence: float
    bbox: BBox


class DetectionResponse(BaseModel):
    """Result of an image detection request.

    ``annotated_image`` is a base64 data URL (PNG) so the frontend can render
    it without a second round-trip; ``heatmap_image`` is optional.
    """

    model: str
    elapsed_ms: float
    image_width: int
    image_height: int
    total: int
    counts: dict[str, int]
    detections: list[DetectionItem]
    annotated_image: str
    heatmap_image: str | None = None


class VideoJobCreated(BaseModel):
    job_id: str


class VideoJobStatus(BaseModel):
    """Polled state of a video detection job.

    ``unique_counts`` are distinct BoT-SORT track IDs per species (estimated
    individuals); ``peak_counts`` are the most simultaneous detections in any
    one frame. ``video_url`` is set once status == "done".
    """

    job_id: str
    status: str = Field(description="queued | processing | done | error")
    progress: float
    error: str | None = None
    filename: str | None = None
    model: str | None = None
    frames_total: int | None = None
    frames_processed: int | None = None
    elapsed_s: float | None = None
    unique_counts: dict[str, int] | None = None
    peak_counts: dict[str, int] | None = None
    total_unique: int | None = None
    video_url: str | None = None
    population: dict | None = None   # distance-sampling estimate when survey params given


class PopulationEstimate(BaseModel):
    """Distance-sampling density estimate + the data to draw the classic plot.

    Every field is a statistical ESTIMATE under standard assumptions — on a
    prototype with assumed camera parameters it is illustrative, not a census.
    """

    n_detections: int
    model: str
    density: float
    density_ci: list[float]
    abundance: float | None = None
    abundance_ci: list[float] | None = None
    esw: float
    p_detect: float
    encounter_rate: float
    cv_density: float
    truncation_w: float
    transect_length: float
    area: float | None = None
    curve: list[dict] = Field(default_factory=list)       # fitted detection function g(y)
    histogram: list[dict] = Field(default_factory=list)   # observed distance histogram
    detections: list[dict] = Field(default_factory=list)  # {lat, lon, species} for the map
    truth: dict | None = None                             # present in synthetic demo


class ModelInfo(BaseModel):
    name: str
    path: str
    size_mb: float
    is_default: bool = False
    recommended_conf: float = 0.3       # suggested confidence for this checkpoint
    viewpoint: str = "general"          # nadir | oblique | general
    note: str = ""                     # one-line guidance shown in the UI


class SystemInfo(BaseModel):
    status: str = "ok"
    version: str
    device: str
    torch_cuda: bool
    models_available: int
    project: str


class ClassInfo(BaseModel):
    id: int
    name: str
    hex: str
    sources: list[str]


class Capability(BaseModel):
    id: str
    title: str
    summary: str
    status: str = Field(description="live | beta | planned")
    category: str
    icon: str