"""FlowDeck — Dashboard : settings.

Découpe A28 de l'ancien app/routers/dashboard.py (2 735 lignes, 63 routes) — un module par concern, contrat inchangé.
"""
from __future__ import annotations

import logging

from fastapi import APIRouter, Body, Request
from fastapi.responses import HTMLResponse, JSONResponse, RedirectResponse

from app.auth.session import SessionManager
from app.db import get_conn

from ._common import _format_size, _get_active_workspace, _get_user_id, _sidebar_data

logger = logging.getLogger(__name__)
router = APIRouter(tags=["dashboard"])




# ═══════════ Settings Page ═══════════

@router.get("/settings", response_class=HTMLResponse)
def app_settings_page(request: Request):
    """Settings & configuration page."""
    from app.templating import ENV
    env = ENV
    sidebar = _sidebar_data(request, [])
    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
    if not user:
        return RedirectResponse("/auth/login?provider=local", status_code=302)
    ctx = {**sidebar, "user": user}
    # Pass active workspace for breadcrumb nav menu
    ws = _get_active_workspace(request, user_id=_get_user_id(request))
    ctx["nav_workspace_id"] = ws["id"] if ws else 0
    template = env.get_template("settings.html")
    return template.render(**ctx)




@router.post("/api/settings/avatar")
async def upload_avatar(request: Request):
    """Upload a user avatar image."""
    import os
    import uuid
    from pathlib import Path
    form = await request.form()
    file = form.get("file")
    if not file:
        return {"error": "No file"}, 400
    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
    if not user:
        return {"error": "Not authenticated"}, 401
    # Save to data/avatars
    avatars_dir = Path("/data/avatars")
    avatars_dir.mkdir(parents=True, exist_ok=True)
    ext = os.path.splitext(file.filename)[1] or ".png"
    filename = f"{user['id']}_{uuid.uuid4().hex[:8]}{ext}"
    filepath = avatars_dir / filename
    content = await file.read()
    filepath.write_bytes(content)
    # Update user avatar_url
    avatar_url = f"/api/settings/avatar/{filename}"
    with get_conn() as conn:
        conn.execute("UPDATE users SET avatar_url = ? WHERE id = ?", (avatar_url, user["id"]))
        conn.commit()
    return {"avatar_url": avatar_url}




@router.get("/api/settings/avatar/{filename:path}")
def serve_avatar_file(filename: str):
    """Serve an uploaded avatar image file."""
    from pathlib import Path

    from fastapi.responses import FileResponse
    # A11 : garde path traversal (motif de serve_uploaded_file) — `:path` Starlette
    # accepte les `/`, donc `..%2f` ressortirait du dossier avatars.
    base_dir = Path("/data/avatars").resolve()
    filepath = (base_dir / filename).resolve()
    try:
        filepath.relative_to(base_dir)
    except ValueError:
        return JSONResponse({"error": "Path traversal denied"}, status_code=403)
    if not filepath.is_file():
        return JSONResponse({"error": "Not found"}, status_code=404)
    return FileResponse(filepath)




@router.get("/api/avatar/{user_id:int}")
def get_avatar(user_id: int):
    """Redirect to the user's avatar."""
    with get_conn() as conn:
        row = conn.execute("SELECT avatar_url FROM users WHERE id = ?", (user_id,)).fetchone()
    if row and row["avatar_url"]:
        return RedirectResponse(row["avatar_url"], status_code=302)
    return JSONResponse({"error": "No avatar"}, status_code=404)




@router.post("/api/settings/avatar-color")
def set_avatar_color(request: Request, body: dict = Body(default={})):
    """Set the user's avatar background color."""
    color = body.get("color", "#3A3A3A")
    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
    if not user:
        return {"error": "Not authenticated"}, 401
    with get_conn() as conn:
        conn.execute("UPDATE users SET avatar_url = '', avatar_color = ? WHERE id = ?", (color, user["id"]))
        conn.commit()
    return {"status": "ok", "color": color}


# ═══════════ Tag Management API (per-user) ═══════════




# ═══════════ Tag Management API (per-user) ═══════════

@router.post("/api/settings/tags")
def create_tag_global(request: Request, body: dict = Body(default={})):
    """Create a tag for the current user."""
    tag_name = body.get("name", "").strip().lower()
    color = body.get("color", "#787774")
    uid = _get_user_id(request)
    if not tag_name or not uid:
        return {"error": "Tag name required"}, 400
    with get_conn() as conn:
        tag = conn.execute("SELECT id FROM tags WHERE name = ? AND user_id = ?", (tag_name, uid)).fetchone()
        if tag:
            conn.execute("UPDATE tags SET color = ? WHERE id = ?", (color, tag["id"]))
            conn.commit()
            return {"tag": {"id": tag["id"], "name": tag_name, "color": color}}
        cursor = conn.execute("INSERT INTO tags (name, color, user_id) VALUES (?, ?, ?)", (tag_name, color, uid))
        conn.commit()
        return {"tag": {"id": cursor.lastrowid, "name": tag_name, "color": color}}




@router.put("/api/settings/tags/{tag_id:int}")
def update_tag_global(tag_id: int, request: Request, body: dict = Body(default={})):
    """Update a tag (name or color) — only if owned by user."""
    uid = _get_user_id(request)
    with get_conn() as conn:
        if "name" in body:
            conn.execute("UPDATE tags SET name = ? WHERE id = ? AND user_id = ?", (body["name"].strip().lower(), tag_id, uid))
        if "color" in body:
            conn.execute("UPDATE tags SET color = ? WHERE id = ? AND user_id = ?", (body["color"], tag_id, uid))
        conn.commit()
    return {"status": "ok"}




@router.delete("/api/settings/tags/{tag_id:int}")
def delete_tag_global(tag_id: int, request: Request):
    """Delete a tag — only if owned by user."""
    uid = _get_user_id(request)
    with get_conn() as conn:
        conn.execute("DELETE FROM page_tags WHERE tag_id = ?", (tag_id,))
        conn.execute("DELETE FROM tags WHERE id = ? AND user_id = ?", (tag_id, uid))
        conn.commit()
    return {"status": "ok"}




@router.get("/api/settings/tags/all")
def list_all_tags_global(request: Request):
    """List current user's tags with counts."""
    uid = _get_user_id(request)
    with get_conn() as conn:
        rows = conn.execute(
            "SELECT t.id, t.name, t.color, COUNT(pt.page_id) as count "
            "FROM tags t LEFT JOIN page_tags pt ON pt.tag_id = t.id "
            "WHERE t.user_id = ? GROUP BY t.id ORDER BY t.name",
            (uid,),
        ).fetchall()
    return JSONResponse(
        {"tags": [dict(r) for r in rows]},
        headers={"Cache-Control": "no-store"},
    )


# ═══════════ Workspace Tags API ═══════════




# ═══════════ Workspace Tags API ═══════════

@router.get("/api/local-workspace/tags")
def list_tags(request: Request):
    """List ALL user tags with counts scoped to the active workspace."""
    ws = _get_active_workspace(request, user_id=_get_user_id(request))
    ws_id = ws["id"] if ws else None
    uid = _get_user_id(request)
    if not ws_id:
        return {"tags": []}
    with get_conn() as conn:
        rows = conn.execute(
            "SELECT t.id, t.name, t.color, "
            "(SELECT COUNT(*) FROM page_tags pt "
            " JOIN pages p ON p.id = pt.page_id AND p.workspace_id = ? "
            " WHERE pt.tag_id = t.id) as count "
            "FROM tags t WHERE t.user_id = ? ORDER BY t.name",
            (ws_id, uid),
        ).fetchall()
    return JSONResponse(
        {"tags": [dict(r) for r in rows]},
        headers={"Cache-Control": "no-store"},
    )




@router.get("/api/local-workspace/items/{item_id:int}/tags")
def get_item_tags(item_id: int):
    """Get tags for a specific item."""
    with get_conn() as conn:
        rows = conn.execute(
            "SELECT t.id, t.name, t.color FROM tags t "
            "JOIN page_tags pt ON pt.tag_id = t.id "
            "WHERE pt.page_id = ? ORDER BY t.name",
            (item_id,),
        ).fetchall()
    return {"tags": [dict(r) for r in rows]}




@router.post("/api/local-workspace/items/{item_id:int}/tags")
def add_item_tag(request: Request, item_id: int, body: dict = Body(default={})):
    """Add a tag to an item (creates tag if new, scoped to user)."""
    tag_name = body.get("name", "").strip().lower()
    tag_color = body.get("color", "#787774")
    uid = _get_user_id(request)
    if not tag_name:
        return {"error": "Tag name required"}, 400

    with get_conn() as conn:
        # Get or create tag (per user)
        tag = conn.execute("SELECT id, name, color FROM tags WHERE name = ? AND user_id = ?", (tag_name, uid)).fetchone()
        if not tag:
            cursor = conn.execute(
                "INSERT INTO tags (name, color, user_id) VALUES (?, ?, ?)", (tag_name, tag_color, uid)
            )
            conn.commit()
            tag_id = cursor.lastrowid
            tag = {"id": tag_id, "name": tag_name, "color": tag_color}
        else:
            tag_id = tag["id"]

        # Link tag to page (ignore duplicate)
        try:
            conn.execute(
                "INSERT OR IGNORE INTO page_tags (page_id, tag_id) VALUES (?, ?)",
                (item_id, tag_id),
            )
            conn.commit()
        except Exception:
            logger.exception("add_item_tag")

    return {"tag": {"id": tag["id"], "name": tag["name"], "color": tag["color"]}}




@router.delete("/api/local-workspace/items/{item_id:int}/tags/{tag_id:int}")
def remove_item_tag(item_id: int, tag_id: int):
    """Remove a tag from an item."""
    with get_conn() as conn:
        conn.execute(
            "DELETE FROM page_tags WHERE page_id = ? AND tag_id = ?",
            (item_id, tag_id),
        )
        conn.commit()
    return {"status": "ok"}




@router.get("/api/local-workspace/tags/search")
def search_by_tags(request: Request, tags: str = ""):
    """Search items by tags (comma-separated)."""
    ws = _get_active_workspace(request, user_id=_get_user_id(request))
    ws_id = ws["id"] if ws else None
    if not ws_id:
        return {"items": []}
    tag_names = [t.strip().lower() for t in tags.split(",") if t.strip()]
    if not tag_names:
        return {"items": []}
    with get_conn() as conn:
        placeholders = ",".join("?" for _ in tag_names)
        rows = conn.execute(
            f"SELECT DISTINCT p.id, p.title, p.content_format, p.parent_section, "
            f"p.content, p.created_at, p.updated_at "
            f"FROM pages p "
            f"JOIN page_tags pt ON pt.page_id = p.id "
            f"JOIN tags t ON t.id = pt.tag_id "
            f"WHERE t.name IN ({placeholders}) AND p.workspace_id = ? AND p.deleted_at IS NULL "
            f"ORDER BY p.updated_at DESC",
            tag_names + [ws_id],
        ).fetchall()
    items = []
    for r in rows:
        is_folder = r["parent_section"] == "Workspace"
        size = len(r["content"] or "")
        items.append({
            "id": r["id"],
            "name": r["title"] or "Untitled",
            "is_folder": is_folder,
            "content_format": r["content_format"],
            "created_at": r["created_at"],
            "updated_at": r["updated_at"],
            "size": size,
            "size_display": _format_size(size),
        })
    return {"items": items}


# ── Account update ──




# ── Account update ──
@router.put("/api/settings/account")
def update_account(request: Request, body: dict = Body(default={})):
    """Update current user's profile: full_name, login, email, password."""
    from app.password_utils import hash_password
    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
    if not user:
        return JSONResponse({"error": "Not authenticated"}, status_code=401)
    with get_conn() as conn:
        uid = user["id"]
        if "full_name" in body:
            conn.execute("UPDATE users SET full_name=? WHERE id=?", (body["full_name"].strip(), uid))
        if "login" in body:
            new_login = body["login"].strip()
            if new_login and new_login != user.get("login"):
                existing = conn.execute("SELECT id FROM users WHERE login=? AND id!=?", (new_login, uid)).fetchone()
                if existing:
                    return JSONResponse({"error": "Username already taken"}, status_code=409)
                conn.execute("UPDATE users SET login=? WHERE id=?", (new_login, uid))
        if "email" in body:
            conn.execute("UPDATE users SET email=? WHERE id=?", (body["email"].strip(), uid))
        if "password" in body and body["password"].strip():
            pw = body["password"].strip()
            if len(pw) < 6:
                return JSONResponse({"error": "Password must be at least 6 characters"}, status_code=400)
            conn.execute("UPDATE users SET password_hash=? WHERE id=?", (hash_password(pw), uid))
        conn.commit()
        row = conn.execute("SELECT * FROM users WHERE id=?", (uid,)).fetchone()
        user_data = dict(row)
    # Refresh session cookie with updated data (keeps the same session id)
    cookie = request.cookies.get("flowdeck_session", "")
    new_session = SessionManager.refresh_session(cookie, user_data, request)
    response = JSONResponse({"status": "ok", "user": {k: user_data[k] for k in ("id","login","full_name","email","is_admin")}})
    response.set_cookie("flowdeck_session", new_session, httponly=True, max_age=86400 * 7, samesite="lax", path="/")
    return response


# ═══════════ Sidebar Refresh API ═══════════




# ═══════════ Sidebar Refresh API ═══════════

@router.get("/api/sidebar/workspace-tree")
def sidebar_workspace_tree(request: Request):
    """Return the sidebar workspace tree as HTML fragment.

    Called by appState().refreshSidebarTree() after CRUD operations
    in the main content area to keep the sidebar in sync.
    """
    from app.routers.board import _load_workspace_pages
    from app.templating import ENV

    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
    if not user:
        return HTMLResponse("")

    ws_cookie = request.cookies.get("flowdeck_workspace", "")
    if not ws_cookie:
        return HTMLResponse('<li class="sidebar-item empty-hint"><span class="page-icon">📄</span><span class="page-name text-dim">No pages yet</span></li>')

    # Gitea workspace — no server-side tree, loaded client-side
    if ws_cookie.startswith("gitea:"):
        return HTMLResponse('<li class="sidebar-item empty-hint"><span class="page-icon">🔗</span><span class="page-name text-dim">Remote workspace</span></li>')

    try:
        ws_id = int(ws_cookie)
        with get_conn() as conn:
            # Verify workspace belongs to user
            row = conn.execute(
                "SELECT id FROM workspaces WHERE id=? AND owner_id=?",
                (ws_id, user["id"])
            ).fetchone()
            if not row:
                return HTMLResponse(
                    '<li class="sidebar-item empty-hint"><span class="page-icon">📄</span>'
                    '<span class="page-name text-dim">No pages yet</span></li>'
                )

        pages = _load_workspace_pages(ws_cookie)
        if not pages:
            return HTMLResponse(
                '<li class="sidebar-item empty-hint"><span class="page-icon">📄</span>'
                '<span class="page-name text-dim">No pages yet</span></li>'
            )

        # Render the tree using the extracted macro
        env = ENV
        template = env.from_string(
            "{% from '_workspace_tree_macro.html' import render_workspace_tree %}"
            "{{ render_workspace_tree(pages) }}"
        )
        html = template.render(pages=pages)
        return HTMLResponse(html)
    except (ValueError, Exception) as e:
        logger.error(f"sidebar_workspace_tree failed: {e}", exc_info=True)
        return HTMLResponse(
            '<li class="sidebar-item empty-hint"><span class="page-icon">📄</span>'
            '<span class="page-name text-dim">No pages yet</span></li>'
        )


# ═══════════ Public Published Page ═══════════