"""
Dashboard, Export, Executive Dashboard Pydantic schemas — extracted from compliance/api/schemas.py.

Phase 1 Step 3: the monolithic ``compliance.api.schemas`` module is being
split per domain under ``compliance.schemas``. This module is re-exported
from ``compliance.api.schemas`` for backwards compatibility.
"""

from datetime import datetime, date
from typing import Optional, List, Any, Dict

from pydantic import BaseModel, ConfigDict, Field

from compliance.schemas.common import (
    PaginationMeta, RegulationType, ControlType, ControlDomain,
    ControlStatus, RiskLevel, EvidenceStatus,
)
from compliance.schemas.evidence import EvidenceResponse
from compliance.schemas.risk import RiskResponse


# ============================================================================
# Dashboard & Export Schemas
# ============================================================================

class DashboardResponse(BaseModel):
    compliance_score: float
    total_regulations: int
    total_requirements: int
    total_controls: int
    controls_by_status: Dict[str, int]
    controls_by_domain: Dict[str, Dict[str, int]]
    total_evidence: int
    evidence_by_status: Dict[str, int]
    total_risks: int
    risks_by_level: Dict[str, int]
    recent_activity: List[Dict[str, Any]]


class ExportRequest(BaseModel):
    export_type: str = "full"  # "full", "controls_only", "evidence_only"
    included_regulations: Optional[List[str]] = None
    included_domains: Optional[List[str]] = None
    date_range_start: Optional[date] = None
    date_range_end: Optional[date] = None


class ExportResponse(BaseModel):
    id: str
    export_type: str
    export_name: Optional[str] = None
    status: str
    requested_by: str
    requested_at: datetime
    completed_at: Optional[datetime] = None
    file_path: Optional[str] = None
    file_hash: Optional[str] = None
    file_size_bytes: Optional[int] = None
    total_controls: Optional[int] = None
    total_evidence: Optional[int] = None
    compliance_score: Optional[float] = None
    error_message: Optional[str] = None

    model_config = ConfigDict(from_attributes=True)


class ExportListResponse(BaseModel):
    exports: List[ExportResponse]
    total: int


# ============================================================================
# Seeding Schemas
# ============================================================================

class SeedRequest(BaseModel):
    force: bool = False


class SeedResponse(BaseModel):
    success: bool
    message: str
    counts: Dict[str, int]


class PaginatedEvidenceResponse(BaseModel):
    """Paginated response for evidence."""
    data: List[EvidenceResponse]
    pagination: PaginationMeta


class PaginatedRiskResponse(BaseModel):
    """Paginated response for risks."""
    data: List[RiskResponse]
    pagination: PaginationMeta


# ============================================================================
# Executive Dashboard Schemas (Phase 3 - Sprint 1)
# ============================================================================

class TrendDataPoint(BaseModel):
    """A single data point for trend charts."""
    date: str  # ISO date string
    score: float
    label: Optional[str] = None  # Formatted date for display (e.g., "Jan 26")


class RiskSummary(BaseModel):
    """Summary of a risk for executive display."""
    id: str
    risk_id: str
    title: str
    risk_level: str  # "low", "medium", "high", "critical"
    owner: Optional[str] = None
    status: str
    category: str
    impact: int
    likelihood: int


class DeadlineItem(BaseModel):
    """An upcoming deadline for executive display."""
    id: str
    title: str
    deadline: str  # ISO date string
    days_remaining: int
    type: str  # "control_review", "evidence_expiry", "audit"
    status: str  # "on_track", "at_risk", "overdue"
    owner: Optional[str] = None


class TeamWorkloadItem(BaseModel):
    """Workload distribution for a team or person."""
    name: str
    pending_tasks: int
    in_progress_tasks: int
    completed_tasks: int
    total_tasks: int
    completion_rate: float


class ExecutiveDashboardResponse(BaseModel):
    """
    Executive Dashboard Response

    Provides a high-level overview for managers and executives:
    - Traffic light status (green/yellow/red)
    - Overall compliance score
    - 12-month trend data
    - Top 5 risks
    - Upcoming deadlines
    - Team workload distribution
    """
    traffic_light_status: str  # "green", "yellow", "red"
    overall_score: float
    score_trend: List[TrendDataPoint]
    previous_score: Optional[float] = None
    score_change: Optional[float] = None  # Positive = improvement

    # Counts
    total_regulations: int
    total_requirements: int
    total_controls: int
    open_risks: int

    # Top items
    top_risks: List[RiskSummary]
    upcoming_deadlines: List[DeadlineItem]

    # Workload
    team_workload: List[TeamWorkloadItem]

    # Last updated
    last_updated: str


class ComplianceSnapshotCreate(BaseModel):
    """Request to create a compliance snapshot."""
    notes: Optional[str] = None


class ComplianceSnapshotResponse(BaseModel):
    """Response for a compliance snapshot."""
    id: str
    snapshot_date: str
    overall_score: float
    scores_by_regulation: Dict[str, float]
    scores_by_domain: Dict[str, float]
    total_controls: int
    passed_controls: int
    failed_controls: int
    notes: Optional[str] = None
    created_at: str