"""
Club & Organization Management Endpoints for Shinkan Jinkendo

Handles CRUD operations for clubs, divisions, and training groups.
"""
from typing import Any, List, Optional
from fastapi import APIRouter, HTTPException, Depends, Query

from db import get_db, get_cursor, r2d
from auth import require_auth
from club_tenancy import (
    assert_club_member,
    can_manage_club_org,
    can_plan_in_club,
    club_ids_for_profile,
    is_platform_admin,
)

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


# ── List Clubs ────────────────────────────────────────────────────────
@router.get("/clubs")
def list_clubs(
    status: Optional[str] = Query(default=None),
    session=Depends(require_auth),
):
    """
    Vereine: für normale Nutzer nur Mitgliedschaft-Vereine; Plattform-Admins sehen alle.
    """
    role = session.get("role")
    profile_id = session["profile_id"]
    with get_db() as conn:
        cur = get_cursor(conn)
        query = "SELECT * FROM clubs"
        params: List[Any] = []
        conds = []

        if not is_platform_admin(role):
            cids = club_ids_for_profile(cur, profile_id)
            if not cids:
                return []
            conds.append("id IN (" + ",".join(["%s"] * len(cids)) + ")")
            params.extend(sorted(cids))

        if status:
            conds.append("status = %s")
            params.append(status)

        if conds:
            query += " WHERE " + " AND ".join(conds)

        query += " ORDER BY name"

        cur.execute(query, params)
        rows = cur.fetchall()
        return [r2d(r) for r in rows]


# ── Get Club ──────────────────────────────────────────────────────────
@router.get("/clubs/{club_id}")
def get_club(club_id: int, session=Depends(require_auth)):
    """Get club by ID with divisions and groups – nur Mitglied oder Plattform-Admin."""
    profile_id = session["profile_id"]
    role = session.get("role")
    with get_db() as conn:
        cur = get_cursor(conn)
        if not is_platform_admin(role):
            assert_club_member(cur, profile_id, club_id)

        # Get club
        cur.execute("SELECT * FROM clubs WHERE id = %s", (club_id,))
        club = cur.fetchone()

        if not club:
            raise HTTPException(404, "Verein nicht gefunden")

        club = r2d(club)

        # Get divisions
        cur.execute(
            """
            SELECT * FROM divisions
            WHERE club_id = %s
            ORDER BY name
        """,
            (club_id,),
        )
        club["divisions"] = [r2d(r) for r in cur.fetchall()]

        # Get training groups
        cur.execute(
            """
            SELECT g.*,
                p.name as trainer_name
            FROM training_groups g
            LEFT JOIN profiles p ON g.trainer_id = p.id
            WHERE g.club_id = %s
            ORDER BY g.weekday, g.time_start
        """,
            (club_id,),
        )
        club["training_groups"] = [r2d(r) for r in cur.fetchall()]

        return club


# ── Create Club ───────────────────────────────────────────────────────
@router.post("/clubs")
def create_club(data: dict, session=Depends(require_auth)):
    """Neuen Verein anlegen – nur Plattform-Admin; Pflicht: primary_admin_profile_id (Hauptverwalter:in)."""
    role = session.get("role")
    if not is_platform_admin(role):
        raise HTTPException(403, "Nur Plattform-Administratoren dürfen neue Vereine anlegen")

    name = data.get("name")
    primary_admin_profile_id = data.get("primary_admin_profile_id")
    if not name:
        raise HTTPException(400, "Name ist Pflichtfeld")
    if not primary_admin_profile_id:
        raise HTTPException(400, "primary_admin_profile_id ist Pflichtfeld (Hauptverwalter:in)")

    try:
        aid = int(primary_admin_profile_id)
    except (TypeError, ValueError):
        raise HTTPException(400, "primary_admin_profile_id ungültig")

    with get_db() as conn:
        cur = get_cursor(conn)
        cur.execute("SELECT id FROM profiles WHERE id = %s", (aid,))
        if not cur.fetchone():
            raise HTTPException(404, "Profil für Hauptverwalter nicht gefunden")

        cur.execute(
            """
            INSERT INTO clubs (name, abbreviation, description, status, primary_admin_profile_id)
            VALUES (%s, %s, %s, %s, %s)
            RETURNING id
        """,
            (
                name,
                data.get("abbreviation"),
                data.get("description"),
                data.get("status", "active"),
                aid,
            ),
        )

        club_id = cur.fetchone()["id"]

        cur.execute(
            """
            INSERT INTO club_members (profile_id, club_id, status)
            VALUES (%s, %s, 'active')
            ON CONFLICT (profile_id, club_id)
            DO UPDATE SET status = 'active', updated_at = NOW()
            RETURNING id
        """,
            (aid, club_id),
        )
        cm_id = cur.fetchone()["id"]
        for rc in ("club_admin", "trainer"):
            cur.execute(
                """
                INSERT INTO club_member_roles (club_member_id, role_code)
                VALUES (%s, %s)
                ON CONFLICT (club_member_id, role_code) DO NOTHING
            """,
                (cm_id, rc),
            )

        conn.commit()

    return get_club(club_id, session)


# ── Update Club ───────────────────────────────────────────────────────
@router.put("/clubs/{club_id}")
def update_club(club_id: int, data: dict, session=Depends(require_auth)):
    """Verein bearbeiten – Plattform-Admin oder Vereinsadmin."""
    profile_id = session["profile_id"]
    role = session.get("role")

    with get_db() as conn:
        cur = get_cursor(conn)

        # Check existence
        cur.execute("SELECT id FROM clubs WHERE id = %s", (club_id,))
        if not cur.fetchone():
            raise HTTPException(404, "Verein nicht gefunden")

        if not can_manage_club_org(cur, profile_id, club_id, role):
            raise HTTPException(403, "Keine Berechtigung für diesen Verein")

        # Nur Plattform-Admin darf primary_admin_profile_id ändern
        if "primary_admin_profile_id" in data and data["primary_admin_profile_id"] is not None:
            if not is_platform_admin(role):
                raise HTTPException(403, "Nur Plattform-Admins dürfen den Hauptverwalter ändern")

        # Update
        cur.execute(
            """
            UPDATE clubs SET
                name = COALESCE(%s, name),
                abbreviation = COALESCE(%s, abbreviation),
                description = COALESCE(%s, description),
                status = COALESCE(%s, status),
                primary_admin_profile_id = COALESCE(%s, primary_admin_profile_id),
                updated_at = NOW()
            WHERE id = %s
        """,
            (
                data.get("name"),
                data.get("abbreviation"),
                data.get("description"),
                data.get("status"),
                data.get("primary_admin_profile_id"),
                club_id,
            ),
        )

        conn.commit()

    return get_club(club_id, session)


# ── Delete Club ───────────────────────────────────────────────────────
@router.delete("/clubs/{club_id}")
def delete_club(club_id: int, session=Depends(require_auth)):
    """Delete club (superadmin only)."""
    role = session.get('role')
    if role != 'superadmin':
        raise HTTPException(403, "Nur Superadmins dürfen Vereine löschen")

    with get_db() as conn:
        cur = get_cursor(conn)

        # Check existence
        cur.execute("SELECT id FROM clubs WHERE id = %s", (club_id,))
        if not cur.fetchone():
            raise HTTPException(404, "Verein nicht gefunden")

        # Delete (CASCADE handles divisions and groups)
        cur.execute("DELETE FROM clubs WHERE id = %s", (club_id,))
        conn.commit()

    return {"ok": True}


# ── List Divisions ────────────────────────────────────────────────────
@router.get("/divisions")
def list_divisions(
    club_id: Optional[int] = Query(default=None),
    session=Depends(require_auth),
):
    """Sparten – ohne Admin-Rechte nur in eigenen Vereinen sichtbar."""
    profile_id = session["profile_id"]
    role = session.get("role")

    with get_db() as conn:
        cur = get_cursor(conn)

        mine = club_ids_for_profile(cur, profile_id)
        if not is_platform_admin(role) and not mine:
            return []

        query = """
            SELECT d.*, c.name as club_name
            FROM divisions d
            LEFT JOIN clubs c ON d.club_id = c.id
        """
        where = []
        params = []

        if club_id is not None:
            where.append("d.club_id = %s")
            params.append(club_id)
            if not is_platform_admin(role) and club_id not in mine:
                return []

        if not is_platform_admin(role):
            where.append(
                "d.club_id IN (" + ",".join(["%s"] * len(mine)) + ")"
            )
            params.extend(sorted(mine))

        if where:
            query += " WHERE " + " AND ".join(where)

        query += " ORDER BY d.name"

        cur.execute(query, params)
        rows = cur.fetchall()
        return [r2d(r) for r in rows]


# ── Create Division ───────────────────────────────────────────────────
@router.post("/divisions")
def create_division(data: dict, session=Depends(require_auth)):
    """Create new division – Vereinsadmin / Plattform-Admin."""
    profile_id = session["profile_id"]
    role = session.get("role")

    club_id = data.get("club_id")
    name = data.get("name")

    if not club_id or not name:
        raise HTTPException(400, "club_id und name sind Pflichtfelder")

    with get_db() as conn:
        cur = get_cursor(conn)

        if not can_manage_club_org(cur, profile_id, int(club_id), role):
            raise HTTPException(403, "Keine Berechtigung, Sparten in diesem Verein anzulegen")

        # Check club exists
        cur.execute("SELECT id FROM clubs WHERE id = %s", (club_id,))
        if not cur.fetchone():
            raise HTTPException(404, "Verein nicht gefunden")

        # Insert
        cur.execute(
            """
            INSERT INTO divisions (club_id, name, focus_area)
            VALUES (%s, %s, %s)
            RETURNING id
        """,
            (
                club_id,
                name,
                data.get("focus_area"),
            ),
        )

        division_id = cur.fetchone()["id"]
        conn.commit()

        # Return created division
        cur.execute(
            """
            SELECT d.*, c.name as club_name
            FROM divisions d
            LEFT JOIN clubs c ON d.club_id = c.id
            WHERE d.id = %s
        """,
            (division_id,),
        )
        return r2d(cur.fetchone())


# ── Update Division ───────────────────────────────────────────────────
@router.put("/divisions/{division_id}")
def update_division(division_id: int, data: dict, session=Depends(require_auth)):
    """Update division – Vereinsadmin / Plattform-Admin."""
    profile_id = session["profile_id"]
    role = session.get("role")

    with get_db() as conn:
        cur = get_cursor(conn)

        cur.execute("SELECT id, club_id FROM divisions WHERE id = %s", (division_id,))
        div = cur.fetchone()
        if not div:
            raise HTTPException(404, "Sparte nicht gefunden")

        if not can_manage_club_org(cur, profile_id, div["club_id"], role):
            raise HTTPException(403, "Keine Berechtigung")

        cur.execute(
            """
            UPDATE divisions SET
                name = %s,
                focus_area = %s,
                updated_at = NOW()
            WHERE id = %s
        """,
            (
                data.get("name"),
                data.get("focus_area"),
                division_id,
            ),
        )

        conn.commit()

        cur.execute(
            """
            SELECT d.*, c.name as club_name
            FROM divisions d
            LEFT JOIN clubs c ON d.club_id = c.id
            WHERE d.id = %s
        """,
            (division_id,),
        )
        return r2d(cur.fetchone())


# ── Delete Division ───────────────────────────────────────────────────
@router.delete("/divisions/{division_id}")
def delete_division(division_id: int, session=Depends(require_auth)):
    """Delete division – Vereinsadmin / Plattform-Admin."""
    profile_id = session["profile_id"]
    role = session.get("role")

    with get_db() as conn:
        cur = get_cursor(conn)

        cur.execute("SELECT id, club_id FROM divisions WHERE id = %s", (division_id,))
        div = cur.fetchone()
        if not div:
            raise HTTPException(404, "Sparte nicht gefunden")

        if not can_manage_club_org(cur, profile_id, div["club_id"], role):
            raise HTTPException(403, "Keine Berechtigung")

        cur.execute("DELETE FROM divisions WHERE id = %s", (division_id,))
        conn.commit()

    return {"ok": True}


# ── List Training Groups ──────────────────────────────────────────────
@router.get("/groups")
def list_training_groups(
    club_id: Optional[int] = Query(default=None),
    division_id: Optional[int] = Query(default=None),
    status: Optional[str] = Query(default=None),
    session=Depends(require_auth),
):
    """
    Trainingsgruppen – ohne Plattform-Admin nur in eigenen Vereinen.
    """
    profile_id = session["profile_id"]
    role = session.get("role")

    with get_db() as conn:
        cur = get_cursor(conn)

        mine = club_ids_for_profile(cur, profile_id)
        if not is_platform_admin(role) and not mine:
            return []

        query = """
            SELECT g.*,
                c.name as club_name,
                d.name as division_name,
                p.name as trainer_name
            FROM training_groups g
            LEFT JOIN clubs c ON g.club_id = c.id
            LEFT JOIN divisions d ON g.division_id = d.id
            LEFT JOIN profiles p ON g.trainer_id = p.id
        """

        where = []
        params = []

        if club_id is not None:
            where.append("g.club_id = %s")
            params.append(club_id)
            if not is_platform_admin(role) and club_id not in mine:
                return []

        if division_id is not None:
            where.append("g.division_id = %s")
            params.append(division_id)

        if status:
            where.append("g.status = %s")
            params.append(status)

        if not is_platform_admin(role):
            where.append("g.club_id IN (" + ",".join(["%s"] * len(mine)) + ")")
            params.extend(sorted(mine))

        if where:
            query += " WHERE " + " AND ".join(where)

        query += " ORDER BY g.weekday, g.time_start"

        cur.execute(query, params)
        rows = cur.fetchall()
        return [r2d(r) for r in rows]


# ── Get Training Group ────────────────────────────────────────────────
@router.get("/groups/{group_id}")
def get_training_group(group_id: int, session=Depends(require_auth)):
    """Trainingsgruppe – nur mit Vereinszugriff."""
    profile_id = session["profile_id"]
    role = session.get("role")
    with get_db() as conn:
        cur = get_cursor(conn)

        cur.execute(
            """
            SELECT g.*,
                c.name as club_name,
                d.name as division_name,
                p.name as trainer_name
            FROM training_groups g
            LEFT JOIN clubs c ON g.club_id = c.id
            LEFT JOIN divisions d ON g.division_id = d.id
            LEFT JOIN profiles p ON g.trainer_id = p.id
            WHERE g.id = %s
        """,
            (group_id,),
        )

        group = cur.fetchone()

        if not group:
            raise HTTPException(404, "Trainingsgruppe nicht gefunden")

        cid = group["club_id"]
        if not is_platform_admin(role):
            assert_club_member(cur, profile_id, cid)

        return r2d(group)


# ── Create Training Group ─────────────────────────────────────────────
@router.post("/groups")
def create_training_group(data: dict, session=Depends(require_auth)):
    """Trainingsgruppe anlegen – Mitglied mit Planungs-/Admin-Rolle im Verein."""
    profile_id = session["profile_id"]
    role = session.get("role")
    if role not in ["admin", "superadmin", "trainer", "user"]:
        raise HTTPException(403, "Keine Berechtigung, Trainingsgruppen anzulegen")

    club_id = data.get("club_id")
    name = data.get("name")

    if not club_id or not name:
        raise HTTPException(400, "club_id und name sind Pflichtfelder")

    trainer_id = data.get("trainer_id")
    if trainer_id in (None, "", 0) and role in ("trainer", "user"):
        trainer_id = profile_id

    with get_db() as conn:
        cur = get_cursor(conn)

        if not can_plan_in_club(cur, profile_id, int(club_id), role):
            raise HTTPException(403, "Keine Berechtigung für diesen Verein")

        # Check club exists
        cur.execute("SELECT id FROM clubs WHERE id = %s", (club_id,))
        if not cur.fetchone():
            raise HTTPException(404, "Verein nicht gefunden")

        # Insert
        cur.execute(
            """
            INSERT INTO training_groups (
                club_id, division_id, name, focus, level, age_group,
                weekday, time_start, time_end, location,
                trainer_id, co_trainer_ids, status
            ) VALUES (
                %s, %s, %s, %s, %s, %s,
                %s, %s, %s, %s,
                %s, %s, %s
            ) RETURNING id
        """,
            (
                club_id,
                data.get("division_id"),
                name,
                data.get("focus"),
                data.get("level"),
                data.get("age_group"),
                data.get("weekday"),
                data.get("time_start"),
                data.get("time_end"),
                data.get("location"),
                trainer_id,
                data.get("co_trainer_ids"),
                data.get("status", "active"),
            ),
        )

        group_id = cur.fetchone()["id"]
        conn.commit()

    return get_training_group(group_id, session)


# ── Update Training Group ─────────────────────────────────────────────
@router.put("/groups/{group_id}")
def update_training_group(group_id: int, data: dict, session=Depends(require_auth)):
    """Update training group – Vereinsadmin, Plattform-Admin oder zugewiesene Trainer."""
    profile_id = session["profile_id"]
    role = session.get("role")

    with get_db() as conn:
        cur = get_cursor(conn)

        cur.execute(
            "SELECT trainer_id, co_trainer_ids, club_id FROM training_groups WHERE id = %s",
            (group_id,),
        )
        row = cur.fetchone()
        if not row:
            raise HTTPException(404, "Trainingsgruppe nicht gefunden")

        co_trainers = row["co_trainer_ids"] or []
        club_id = row["club_id"]

        allowed = role in ["admin", "superadmin"]
        if not allowed:
            allowed = can_manage_club_org(cur, profile_id, club_id, role)
        if not allowed:
            allowed = row["trainer_id"] == profile_id or profile_id in co_trainers

        if not allowed:
            raise HTTPException(403, "Keine Berechtigung")

        cur.execute(
            """
            UPDATE training_groups SET
                name = %s,
                division_id = %s,
                focus = %s,
                level = %s,
                age_group = %s,
                weekday = %s,
                time_start = %s,
                time_end = %s,
                location = %s,
                trainer_id = %s,
                co_trainer_ids = %s,
                status = %s,
                updated_at = NOW()
            WHERE id = %s
        """,
            (
                data.get("name"),
                data.get("division_id"),
                data.get("focus"),
                data.get("level"),
                data.get("age_group"),
                data.get("weekday"),
                data.get("time_start"),
                data.get("time_end"),
                data.get("location"),
                data.get("trainer_id"),
                data.get("co_trainer_ids"),
                data.get("status"),
                group_id,
            ),
        )

        conn.commit()

    return get_training_group(group_id, session)


# ── Delete Training Group ─────────────────────────────────────────────
@router.delete("/groups/{group_id}")
def delete_training_group(group_id: int, session=Depends(require_auth)):
    """Delete training group – Vereinsadmin oder Plattform-Admin."""
    profile_id = session["profile_id"]
    role = session.get("role")

    with get_db() as conn:
        cur = get_cursor(conn)

        cur.execute("SELECT id, club_id FROM training_groups WHERE id = %s", (group_id,))
        row = cur.fetchone()
        if not row:
            raise HTTPException(404, "Trainingsgruppe nicht gefunden")

        if not can_manage_club_org(cur, profile_id, row["club_id"], role):
            raise HTTPException(403, "Keine Berechtigung")

        cur.execute("DELETE FROM training_groups WHERE id = %s", (group_id,))
        conn.commit()

    return {"ok": True}