import uuid
from datetime import datetime, date
from typing import Dict, Any, Optional, Union, List, Literal
from pydantic import BaseModel, Field


class Insight(BaseModel):
    """A single insight generated by the agent."""

    message: str
    value: Optional[Union[float, int, str]] = None
    raw_data: Dict[str, Any] = Field(default_factory=dict)
    evidence: Optional[List[str]] = None
    constraint: Optional[str] = None


class InsightsOutput(BaseModel):
    """Output from the InsightsAgent."""

    primary_lever: Insight
    risk_signal: Insight
    key_observations: List[Insight]
    summary: Optional[Insight] = None


class PlanOutput(BaseModel):
    """Output from the PlanAgent."""

    plan: str


class RiskAssessment(BaseModel):
    """Assessment of injury or fatigue risk based on heuristics."""

    risk_level: Literal["LOW", "MEDIUM", "HIGH"]
    reasons: List[str] = Field(default_factory=list)
    recommended_adjustments: List[str] = Field(default_factory=list)
    metrics_used: Dict[str, Any] = Field(default_factory=dict)


class WeeklyTrends(BaseModel):
    """Weekly trend metrics used for analysis."""

    pace_trend_s_per_km: Optional[float] = None
    distance_trend_m: Optional[float] = None
    avg_runs_per_week: Optional[float] = None
    run_monotony: Optional[float] = None


class WeeklySummary(BaseModel):
    """Aggregated metrics for the current coaching session."""

    week_start: Optional[date] = None
    weekly_km: Dict[str, float] = Field(default_factory=dict)
    consistency_score: int = 50
    num_runs: int = 0
    total_distance_m: float = 0.0
    avg_hr_bpm: Optional[float] = None
    avg_pace_s_per_km: float = 0.0
    total_duration_s: int = 0
    performance_brief: Optional[str] = None
    performance_focus: Optional[str] = None
    structure_status: Optional[dict] = None
    brief_source_hash: Optional[str] = None
    brief_generated_at: Optional[datetime] = None


class AnalysisRecord(BaseModel):
    """Full record of an analysis run."""

    id: str = Field(default_factory=lambda: str(uuid.uuid4()))
    created_at: datetime = Field(default_factory=datetime.now)
    source_files: List[str] = Field(default_factory=list)
    formats: List[str] = Field(default_factory=list)
    run_summary: Dict[str, Any] = Field(default_factory=dict)
    run_timeseries: List[Dict[str, Any]] = Field(default_factory=list)
    insights_json: Dict[str, Any] = Field(default_factory=dict)
    plan_json: Dict[str, Any] = Field(default_factory=dict)
    route_json: Dict[str, Any] = Field(default_factory=dict)