"""FlowDeck — Public API v2 : engagement.

Découpe A28 de l'ancien app/routers/api_v2.py (2 110 lignes, 115 routes) — un module par concern, contrat inchangé (Bearer+scopes, pagination, RFC7807, audit + idempotency).
"""
from __future__ import annotations

import json
import logging

from fastapi import APIRouter, Body, Header, HTTPException, Request

from app.db import get_conn
from app.services.api_v2_helpers import (  # noqa: F401 — require_scope est utilisé par les handlers
    audit_log,
    check_idempotency,
    check_v2_rate_limit,
    get_bearer_user,
    has_scope,
    paginate_headers,
    parse_pagination,
    require_scope,
    row_to_dict,
    store_idempotency,
    to_iso8601,
    validate_scopes_input,
)
from app.services.automations import fire_event as _fire_event
from app.services.automations import run_event_sync

from ._common import _v2_rate_check

logger = logging.getLogger(__name__)
router = APIRouter(tags=["api-v2"])



@router.get("/pages/{page_id}/comments")
def list_comments_v2(page_id: int, request: Request, authorization: str | None = Header(default=None)):
    user = get_bearer_user(request, authorization)
    _v2_rate_check(request, user)
    limit, offset = parse_pagination(request)
    with get_conn() as conn:
        total = conn.execute("SELECT COUNT(*) FROM comments WHERE target_id=? OR page_id=?", (page_id, page_id)).fetchone()[0]
        rows = conn.execute("SELECT c.*, u.login, u.full_name FROM comments c LEFT JOIN users u ON u.id=c.user_id WHERE c.target_id=? OR c.page_id=? ORDER BY c.created_at LIMIT ? OFFSET ?", (page_id, page_id, limit, offset)).fetchall()
    return {"comments": [row_to_dict(r) for r in rows], "total": total, "limit": limit, "offset": offset}


@router.post("/pages/{page_id}/comments")
def create_comment_v2(page_id: int, request: Request, authorization: str | None = Header(default=None), body: dict = Body(default={})):
    user = require_scope("write")(request, authorization)
    _v2_rate_check(request, user)
    text = (body.get("body") or body.get("content") or "").strip()
    if not text:
        raise HTTPException(400, "body is required")
    with get_conn() as conn:
        cur = conn.execute("INSERT INTO comments (page_id, user_id, body, target_type, target_id, anchor_block_id, anchor_start, anchor_end) VALUES (?, ?, ?, 'page', ?, ?, ?, ?)", (page_id, user["id"], text, page_id, body.get("anchor_block_id"), body.get("anchor_start"), body.get("anchor_end")))
        nid = cur.lastrowid
        conn.commit()
        row = conn.execute("SELECT * FROM comments WHERE id=?", (nid,)).fetchone()
    audit_log(user, "comment.create", "comment", nid, text[:80], request)
    try:
        run_event_sync(_fire_event("comment.added", {"comment_id": nid, "page_id": page_id, "user_id": user["id"]}))
    except Exception:
        logger.exception("create_comment_v2")
    return {"id": nid, "status": "created", "comment": row_to_dict(row)}


@router.patch("/comments/{comment_id}")
def patch_comment_v2(comment_id: int, request: Request, authorization: str | None = Header(default=None), body: dict = Body(default={})):
    user = require_scope("write")(request, authorization)
    _v2_rate_check(request, user)
    with get_conn() as conn:
        row = conn.execute("SELECT * FROM comments WHERE id=?", (comment_id,)).fetchone()
        if not row:
            raise HTTPException(404, "Comment not found")
        if row["user_id"] != user["id"] and not user.get("is_admin"):
            raise HTTPException(403, "Not your comment")
        body_text = body.get("body", row["body"])
        resolved = body.get("resolved", row["resolved"])
        was_resolved = int(row["resolved"] or 0)
        conn.execute("UPDATE comments SET body=?, resolved=?, updated_at=CURRENT_TIMESTAMP WHERE id=?", (body_text, int(bool(resolved)), comment_id))
        conn.commit()
    if int(bool(resolved)) and not was_resolved:
        try:
            run_event_sync(_fire_event("comment.resolved", {"comment_id": comment_id, "page_id": row["page_id"]}))
        except Exception:
            logger.exception("patch_comment_v2")
    return {"id": comment_id, "status": "updated"}


@router.delete("/comments/{comment_id}")
def delete_comment_v2(comment_id: int, request: Request, authorization: str | None = Header(default=None)):
    user = require_scope("write")(request, authorization)
    _v2_rate_check(request, user)
    with get_conn() as conn:
        row = conn.execute("SELECT * FROM comments WHERE id=?", (comment_id,)).fetchone()
        if not row:
            raise HTTPException(404, "Comment not found")
        if row["user_id"] != user["id"] and not user.get("is_admin"):
            raise HTTPException(403, "Not your comment")
        conn.execute("DELETE FROM comments WHERE id=?", (comment_id,))
        conn.commit()
    return {"id": comment_id, "status": "deleted"}


@router.post("/pages/{page_id}/mentions")
def create_mention_v2(page_id: int, request: Request, authorization: str | None = Header(default=None), body: dict = Body(default={})):
    user = require_scope("write")(request, authorization)
    _v2_rate_check(request, user)
    targets = body.get("user_ids") or body.get("mentions") or []
    if isinstance(targets, int):
        targets = [targets]
    if not targets:
        raise HTTPException(400, "user_ids required")
    created = 0
    with get_conn() as conn:
        for uid in targets:
            try:
                conn.execute("INSERT INTO notifications (user_id, actor_id, ntype, title, message, resource_type, resource_id, url) VALUES (?, ?, 'mention', 'You were mentioned', ?, 'page', ?, ?)", (uid, user["id"], body.get("message") or f"Mentioned in page {page_id}", page_id, f"/pages/{page_id}"))
                created += 1
            except Exception:
                logger.exception("create_mention_v2")
        conn.commit()
    if created:
        try:
            run_event_sync(_fire_event("mention.added", {"page_id": page_id, "user_ids": [u for u in targets if isinstance(u, int)], "count": created}))
        except Exception:
            logger.exception("create_mention_v2")
    return {"mentions": created, "status": "created"}


@router.get("/notifications")
def list_notifications_v2(request: Request, authorization: str | None = Header(default=None)):
    user = get_bearer_user(request, authorization)
    _v2_rate_check(request, user)
    limit, offset = parse_pagination(request)
    unread = request.query_params.get("unread")
    with get_conn() as conn:
        where = "user_id=?"
        params: list = [user["id"]]
        if unread == "1":
            where += " AND is_read=0"
        total = conn.execute(f"SELECT COUNT(*) FROM notifications WHERE {where}", params).fetchone()[0]
        rows = conn.execute(f"SELECT * FROM notifications WHERE {where} ORDER BY created_at DESC LIMIT ? OFFSET ?", (*params, limit, offset)).fetchall()
    return {"notifications": [row_to_dict(r) for r in rows], "total": total, "limit": limit, "offset": offset}


@router.get("/notifications/unread-count")
def unread_count(request: Request, authorization: str | None = Header(default=None)):
    user = get_bearer_user(request, authorization)
    _v2_rate_check(request, user)
    with get_conn() as conn:
        cnt = conn.execute("SELECT COUNT(*) FROM notifications WHERE user_id=? AND is_read=0", (user["id"],)).fetchone()[0]
    return {"unread": cnt}


@router.post("/notifications/{notif_id}/read")
def mark_read(notif_id: int, request: Request, authorization: str | None = Header(default=None)):
    user = get_bearer_user(request, authorization)
    _v2_rate_check(request, user)
    with get_conn() as conn:
        conn.execute("UPDATE notifications SET is_read=1 WHERE id=? AND user_id=?", (notif_id, user["id"]))
        conn.commit()
    return {"id": notif_id, "status": "read"}


@router.post("/notifications/read-all")
def mark_all_read(request: Request, authorization: str | None = Header(default=None)):
    user = get_bearer_user(request, authorization)
    _v2_rate_check(request, user)
    with get_conn() as conn:
        conn.execute("UPDATE notifications SET is_read=1 WHERE user_id=?", (user["id"],))
        conn.commit()
    return {"status": "all read"}


@router.patch("/users/me/preferences")
def patch_prefs(request: Request, authorization: str | None = Header(default=None), body: dict = Body(default={})):
    user = get_bearer_user(request, authorization)
    _v2_rate_check(request, user)
    with get_conn() as conn:
        row = conn.execute("SELECT notification_prefs FROM users WHERE id=?", (user["id"],)).fetchone()
        try:
            cur = json.loads(row["notification_prefs"] or "{}")
        except Exception:
            cur = {}
        cur.update(body)
        conn.execute("UPDATE users SET notification_prefs=? WHERE id=?", (json.dumps(cur), user["id"]))
        conn.commit()
    return {"preferences": cur}


@router.get("/favorites")
def list_favorites_v2(request: Request, authorization: str | None = Header(default=None)):
    user = get_bearer_user(request, authorization)
    _v2_rate_check(request, user)
    with get_conn() as conn:
        rows = conn.execute("SELECT f.*, p.title, p.workspace_id FROM favorites f JOIN pages p ON p.id=f.page_id WHERE f.user_id=? ORDER BY f.position", (user["id"],)).fetchall()
    return {"favorites": [row_to_dict(r) for r in rows]}


@router.post("/favorites")
def add_favorite_v2(request: Request, authorization: str | None = Header(default=None), body: dict = Body(default={})):
    user = require_scope("write")(request, authorization)
    _v2_rate_check(request, user)
    pid = body.get("page_id")
    if not pid:
        raise HTTPException(400, "page_id required")
    with get_conn() as conn:
        try:
            conn.execute("INSERT INTO favorites (user_id, page_id) VALUES (?, ?)", (user["id"], pid))
            conn.commit()
        except Exception as e:
            raise HTTPException(409, str(e)) from None
    try:
        run_event_sync(_fire_event("favorite.added", {"page_id": pid, "user_id": user["id"]}))
    except Exception:
        logger.exception("add_favorite_v2")
    return {"page_id": pid, "status": "added"}


@router.delete("/favorites/{page_id}")
def remove_favorite_v2(page_id: int, request: Request, authorization: str | None = Header(default=None)):
    user = require_scope("write")(request, authorization)
    _v2_rate_check(request, user)
    with get_conn() as conn:
        conn.execute("DELETE FROM favorites WHERE user_id=? AND page_id=?", (user["id"], page_id))
        conn.commit()
    try:
        run_event_sync(_fire_event("favorite.removed", {"page_id": page_id, "user_id": user["id"]}))
    except Exception:
        logger.exception("remove_favorite_v2")
    return {"page_id": page_id, "status": "removed"}


@router.get("/tags")
def list_tags_v2(request: Request, authorization: str | None = Header(default=None)):
    user = get_bearer_user(request, authorization)
    _v2_rate_check(request, user)
    q = (request.query_params.get("q") or "").strip()
    with get_conn() as conn:
        if q:
            rows = conn.execute("SELECT * FROM tags WHERE user_id=? AND name LIKE ? ORDER BY name", (user["id"], f"%{q}%")).fetchall()
        else:
            rows = conn.execute("SELECT * FROM tags WHERE user_id=? ORDER BY name", (user["id"],)).fetchall()
    return {"tags": [dict(r) for r in rows]}


@router.post("/tags")
def create_tag_v2(request: Request, authorization: str | None = Header(default=None), body: dict = Body(default={})):
    user = require_scope("write")(request, authorization)
    _v2_rate_check(request, user)
    name = (body.get("name") or "").strip()
    if not name:
        raise HTTPException(400, "name required")
    color = body.get("color", "#787774")
    with get_conn() as conn:
        try:
            cur = conn.execute("INSERT INTO tags (name, color, user_id) VALUES (?, ?, ?)", (name, color, user["id"]))
            tid = cur.lastrowid
            conn.commit()
        except Exception as e:
            raise HTTPException(409, str(e)) from None
    return {"id": tid, "name": name, "color": color, "status": "created"}


@router.patch("/tags/{tag_id}")
def patch_tag_v2(tag_id: int, request: Request, authorization: str | None = Header(default=None), body: dict = Body(default={})):
    user = require_scope("write")(request, authorization)
    _v2_rate_check(request, user)
    with get_conn() as conn:
        row = conn.execute("SELECT * FROM tags WHERE id=? AND user_id=?", (tag_id, user["id"])).fetchone()
        if not row:
            raise HTTPException(404, "Tag not found")
        name = body.get("name", row["name"])
        color = body.get("color", row["color"])
        conn.execute("UPDATE tags SET name=?, color=? WHERE id=?", (name, color, tag_id))
        conn.commit()
    return {"id": tag_id, "status": "updated"}


@router.delete("/tags/{tag_id}")
def delete_tag_v2(tag_id: int, request: Request, authorization: str | None = Header(default=None)):
    user = require_scope("write")(request, authorization)
    _v2_rate_check(request, user)
    with get_conn() as conn:
        conn.execute("DELETE FROM tags WHERE id=? AND user_id=?", (tag_id, user["id"]))
        conn.commit()
    return {"id": tag_id, "status": "deleted"}


@router.post("/pages/{page_id}/tags")
def attach_tag_v2(page_id: int, request: Request, authorization: str | None = Header(default=None), body: dict = Body(default={})):
    user = require_scope("write")(request, authorization)
    _v2_rate_check(request, user)
    tag_id = body.get("tag_id")
    if not tag_id:
        raise HTTPException(400, "tag_id required")
    with get_conn() as conn:
        try:
            conn.execute("INSERT INTO page_tags (page_id, tag_id) VALUES (?, ?)", (page_id, tag_id))
            conn.commit()
        except Exception as e:
            raise HTTPException(409, str(e)) from None
    return {"page_id": page_id, "tag_id": tag_id, "status": "attached"}


@router.delete("/pages/{page_id}/tags/{tag_id}")
def detach_tag_v2(page_id: int, tag_id: int, request: Request, authorization: str | None = Header(default=None)):
    user = require_scope("write")(request, authorization)
    _v2_rate_check(request, user)
    with get_conn() as conn:
        conn.execute("DELETE FROM page_tags WHERE page_id=? AND tag_id=?", (page_id, tag_id))
        conn.commit()
    return {"status": "detached"}


@router.get("/recents")
def list_recents_v2(request: Request, authorization: str | None = Header(default=None)):
    user = get_bearer_user(request, authorization)
    _v2_rate_check(request, user)
    limit = int(request.query_params.get("limit", "20"))
    st = request.query_params.get("source_type")
    with get_conn() as conn:
        if st:
            rows = conn.execute("SELECT * FROM recents WHERE user_id=? AND source_type=? ORDER BY accessed_at DESC LIMIT ?", (user["id"], st, limit)).fetchall()
        else:
            rows = conn.execute("SELECT * FROM recents WHERE user_id=? ORDER BY accessed_at DESC LIMIT ?", (user["id"], limit)).fetchall()
    return {"recents": [row_to_dict(r) for r in rows]}


@router.get("/pages/{page_id}/shares")
def list_shares_v2(page_id: int, request: Request, authorization: str | None = Header(default=None)):
    user = get_bearer_user(request, authorization)
    _v2_rate_check(request, user)
    with get_conn() as conn:
        rows = conn.execute("SELECT * FROM page_shares WHERE page_id=?", (page_id,)).fetchall()
    return {"shares": [dict(r) for r in rows]}