"""
Platform Admin Router — super_admin / platform_admin operations.

GET  /admin/schools   — list all institutes with member + calendar counts
GET  /admin/stats     — platform-level summary
"""
import os
from typing import Any, Dict, List
from fastapi import APIRouter, Depends, HTTPException
from modules.logger_tool import initialise_logger
from modules.auth.supabase_bearer import SupabaseBearer
from modules.auth.platform_admin import require_platform_admin
from modules.database.supabase.utils.client import SupabaseServiceRoleClient

logger = initialise_logger(__name__, os.getenv("LOG_LEVEL"), os.getenv("LOG_PATH"), 'default', True)
router = APIRouter()


def _sb() -> SupabaseServiceRoleClient:
    return SupabaseServiceRoleClient()


@router.get("/schools")
async def list_all_schools(
    _: dict = Depends(require_platform_admin),
) -> Dict[str, Any]:
    """List every institute with basic counts. Platform admin only."""
    sb = _sb()

    institutes = (
        sb.supabase.table("institutes")
        .select("id,name,urn,website,status,created_at,neo4j_uuid_string")
        .order("name")
        .execute()
        .data or []
    )

    if not institutes:
        return {"status": "ok", "schools": [], "total": 0}

    inst_ids = [i["id"] for i in institutes]

    # Member counts per institute
    all_members = (
        sb.supabase.table("institute_memberships")
        .select("institute_id,role")
        .in_("institute_id", inst_ids)
        .execute()
        .data or []
    )
    from collections import defaultdict
    member_counts: Dict[str, Dict[str, int]] = defaultdict(lambda: {"staff": 0, "students": 0})
    staff_roles = {"teacher", "school_admin", "department_head"}
    for m in all_members:
        iid = m["institute_id"]
        if m["role"] in staff_roles:
            member_counts[iid]["staff"] += 1
        elif m["role"] == "student":
            member_counts[iid]["students"] += 1

    # Calendar presence per institute
    term_rows = (
        sb.supabase.table("academic_terms")
        .select("institute_id")
        .in_("institute_id", inst_ids)
        .execute()
        .data or []
    )
    has_calendar = {r["institute_id"] for r in term_rows}

    # Pending invitations count
    inv_rows = (
        sb.supabase.table("invitations")
        .select("institute_id")
        .eq("status", "pending")
        .in_("institute_id", inst_ids)
        .execute()
        .data or []
    )
    from collections import Counter
    inv_counts = Counter(r["institute_id"] for r in inv_rows)

    schools = []
    for inst in institutes:
        iid = inst["id"]
        mc = member_counts.get(iid, {})
        schools.append({
            **inst,
            "staff_count": mc.get("staff", 0),
            "student_count": mc.get("students", 0),
            "has_calendar": iid in has_calendar,
            "pending_invitations": inv_counts.get(iid, 0),
        })

    return {"status": "ok", "schools": schools, "total": len(schools)}


@router.get("/stats")
async def platform_stats(
    _: dict = Depends(require_platform_admin),
) -> Dict[str, Any]:
    """High-level platform counts. Platform admin only."""
    sb = _sb()

    inst_count = len(
        sb.supabase.table("institutes").select("id").execute().data or []
    )
    profile_count = len(
        sb.supabase.table("profiles").select("id").execute().data or []
    )
    lesson_count = len(
        sb.supabase.table("taught_lessons").select("id").execute().data or []
    )
    inv_count = len(
        sb.supabase.table("invitations").select("id").eq("status", "pending").execute().data or []
    )

    return {
        "status": "ok",
        "schools": inst_count,
        "profiles": profile_count,
        "taught_lessons": lesson_count,
        "pending_invitations": inv_count,
    }


@router.post("/reset")
async def reset_environment(
    _: dict = Depends(require_platform_admin),
) -> Dict[str, Any]:
    """DESTRUCTIVE: wipe all test data. Neo4j + Supabase. Platform admin only."""
    import asyncio
    from run.initialization.reset_environment import reset as _reset
    loop = asyncio.get_event_loop()
    result = await loop.run_in_executor(None, _reset)
    return {"status": "ok", **result}


@router.post("/seed")
async def seed_environment(
    _: dict = Depends(require_platform_admin),
) -> Dict[str, Any]:
    """Idempotent rebuild: both schools, global calendar, 20 test accounts. Platform admin only."""
    import asyncio
    from run.initialization.seed_environment import seed as _seed
    loop = asyncio.get_event_loop()
    result = await loop.run_in_executor(None, _seed)
    return {"status": "ok", **result}


@router.post("/seed-timetable")
async def seed_greenfield_timetable(
    _: dict = Depends(require_platform_admin),
) -> Dict[str, Any]:
    """Seed full timetable + taught lessons for Greenfield Academy. Platform admin only."""
    import asyncio
    from run.initialization.seed_greenfield_timetable import seed as _seed
    loop = asyncio.get_event_loop()
    result = await loop.run_in_executor(None, _seed)
    return {"status": "ok", **result}