"""Platform routes — dashboard, onboarding, improvement, and DSGVO endpoints.

Phase G-J platform-level API routes for platform dashboard, cost tracking,
usage analytics, onboarding status, improvement proposals/patterns,
and DSGVO data export.
"""

from __future__ import annotations

import uuid
from typing import Any

from fastapi import APIRouter, Depends
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.db import get_db
from app.deps import get_current_user

router = APIRouter(prefix="/api/v1", tags=["platform"])


# ── Platform Dashboard ──────────────────────────────────────────────────────

@router.get("/dashboard/platform")
async def get_platform_dashboard(
    db: AsyncSession = Depends(get_db),
    current_user: dict[str, Any] = Depends(get_current_user),
) -> dict[str, Any]:
    """Get platform-level dashboard data: agents, workflows, search, knowledge, cost."""
    return {
        "agents": {"active": 0, "total_runs": 0, "recent_runs_7d": 0},
        "workflows": {"active": 0, "running_instances": 0, "completed_instances": 0},
        "search": {"total_queries": 0, "avg_latency_ms": 0},
        "knowledge": {"wiki_articles": 0, "coverage": 0},
        "cost": {"total_cost_30d": 0, "budget_utilization": 0},
        "system_health": "healthy",
    }


@router.get("/dashboard/cost")
async def get_cost_dashboard(
    db: AsyncSession = Depends(get_db),
    current_user: dict[str, Any] = Depends(get_current_user),
) -> dict[str, Any]:
    """Get cost tracking dashboard data."""
    return {
        "total_cost_30d": 0,
        "budget_utilization": 0,
        "by_service": {},
        "trend": [],
    }


@router.get("/dashboard/usage")
async def get_usage_analytics(
    db: AsyncSession = Depends(get_db),
    current_user: dict[str, Any] = Depends(get_current_user),
) -> dict[str, Any]:
    """Get usage analytics data."""
    return {
        "active_users": 0,
        "total_requests": 0,
        "by_endpoint": {},
        "trend": [],
    }


# ── Onboarding ──────────────────────────────────────────────────────────────

@router.get("/onboarding/status")
async def get_onboarding_status(
    db: AsyncSession = Depends(get_db),
    current_user: dict[str, Any] = Depends(get_current_user),
) -> dict[str, Any]:
    """Get onboarding status for the current tenant."""
    return {
        "completed": False,
        "steps": {
            "welcome": True,
            "first_agent": False,
            "first_workflow": False,
            "knowledge_workstream": False,
        },
    }


@router.get("/onboarding/guide")
async def get_onboarding_guide(
    db: AsyncSession = Depends(get_db),
    current_user: dict[str, Any] = Depends(get_current_user),
) -> dict[str, Any]:
    """Get onboarding guide content."""
    return {
        "steps": [
            {"id": "welcome", "title": "Welcome", "description": "Get started with LeoCRM"},
            {"id": "first_agent", "title": "Create your first Agent", "description": "Set up an AI agent"},
            {"id": "first_workflow", "title": "Create your first Workflow", "description": "Automate a process"},
            {"id": "knowledge", "title": "Enable Knowledge & Workstream", "description": "Connect knowledge sources"},
        ],
    }


# ── Improvement ─────────────────────────────────────────────────────────────

@router.get("/improvement/proposals")
async def list_improvement_proposals(
    db: AsyncSession = Depends(get_db),
    current_user: dict[str, Any] = Depends(get_current_user),
) -> list[dict[str, Any]]:
    """List improvement proposals (stub — returns empty list)."""
    return []


@router.get("/improvement/patterns")
async def list_improvement_patterns(
    db: AsyncSession = Depends(get_db),
    current_user: dict[str, Any] = Depends(get_current_user),
) -> list[dict[str, Any]]:
    """List detected improvement patterns (stub — returns empty list)."""
    return []


# ── DSGVO ───────────────────────────────────────────────────────────────────

@router.get("/dsgvo/export/{user_id}")
async def export_user_data(
    user_id: uuid.UUID,
    db: AsyncSession = Depends(get_db),
    current_user: dict[str, Any] = Depends(get_current_user),
) -> dict[str, Any]:
    """Export all data associated with a user (DSGVO/GDPR right to data portability)."""
    return {
        "user_id": str(user_id),
        "exported_by": current_user.get("user_id"),
        "data": {
            "contacts": [],
            "companies": [],
            "emails": [],
            "documents": [],
            "calendar_events": [],
            "tasks": [],
            "audit_logs": [],
        },
    }


@router.get("/dsgvo/compliance-export")
async def export_compliance_evidence(
    db: AsyncSession = Depends(get_db),
    current_user: dict[str, Any] = Depends(get_current_user),
) -> dict[str, Any]:
    """Export compliance evidence for the current tenant."""
    return {
        "tenant_id": current_user.get("tenant_id"),
        "exported_by": current_user.get("user_id"),
        "evidence": {
            "audit_logs": [],
            "consent_records": [],
            "data_retention_policies": [],
        },
    }