"""FlowDeck — Dashboard: liste des projets Gitea + sidebar data."""
from __future__ import annotations

import logging

from fastapi import APIRouter, Request, Query
from fastapi.responses import HTMLResponse, RedirectResponse

from app.services.gitea_client import gitea
from app.auth.session import SessionManager
from app.db import get_conn

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


def _get_user_or_redirect(request: Request):
    """Return decoded user or a RedirectResponse to login page.
    Skips redirect when DB has no users (fresh install / test env)."""
    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
    if not user:
        # Allow through if no users exist yet (fresh install / tests)
        try:
            with get_conn() as conn:
                count = conn.execute("SELECT COUNT(*) FROM users").fetchone()[0]
                if count == 0:
                    return {"id": 1, "login": "admin", "full_name": "Admin", "is_admin": True}
        except Exception:
            pass
        return RedirectResponse("/auth/login?provider=local", status_code=302)
    return user


def _sidebar_data(request: Request, repos: list[dict]) -> dict:
    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
    ws = user.get("login", "Bruno") if user else "Bruno"
    initial = ws[0].upper() if ws else "B"

    recent_pages = []
    for repo in repos[:10]:
        full_name = repo.get("full_name", "")
        recent_pages.append({
            "id": full_name,
            "name": repo.get("name", full_name),
            "icon": "📁",
            "url": f"/board/{full_name}",
            "active": False,
            "indent": 0,
            "depth": 0,
            "has_children": False,
            "children": [],
        })

    return {
        "workspace_name": ws, "workspace_initial": initial,
        "current_page": "Dashboard", "last_edited": "now",
        "recent_pages": recent_pages,
        "private_pages": [],
        "favorite_pages": [],
        "user": user,
        "workspace_key": "",
    }


@router.get("/trash", response_class=HTMLResponse)
async def trash_page(request: Request, owner: str = Query(default=""), repo: str = Query(default="")):
    """Trash page — scoped to workspace if owner/repo provided."""
    from jinja2 import Environment, FileSystemLoader
    from app.routers.board import _sidebar_data as board_sidebar
    env = Environment(loader=FileSystemLoader("app/templates"))
    sidebar = board_sidebar(request, owner, repo)
    with get_conn() as conn:
        ws_key = f"{owner}/{repo}" if owner and repo else ""
        # Pages are soft-deleted via parent_section='Trash'
        if ws_key:
            rows = conn.execute(
                "SELECT id, title, workspace FROM pages WHERE parent_section='Trash' AND workspace=? ORDER BY updated_at DESC",
                (ws_key,),
            ).fetchall()
        else:
            rows = conn.execute(
                "SELECT id, title, workspace FROM pages WHERE parent_section='Trash' ORDER BY updated_at DESC",
            ).fetchall()
    sidebar["trash_items"] = [{"id": r["id"], "name": r["title"] or "Untitled", "workspace": r["workspace"]} for r in rows]
    template = env.get_template("trash.html")
    return template.render(**sidebar)


@router.get("/library", response_class=HTMLResponse)
async def library_page(request: Request, owner: str = Query(default=""), repo: str = Query(default="")):
    """Library page avec onglets Recents, Favorites, Shared, Private — scopé au workspace.
    
    La sidebar garde exactement la même arborescence que dans le workspace.
    Seul le contenu principal change pour afficher les pages triées par catégorie.
    """
    from jinja2 import Environment, FileSystemLoader
    from app.routers.board import _sidebar_data as board_sidebar
    env = Environment(loader=FileSystemLoader("app/templates"))
    sidebar = board_sidebar(request, owner, repo)  # Sidebar intacte, inchangée

    ws_key = f"{owner}/{repo}" if owner and repo else ""
    with get_conn() as conn:
        base_query = (
            "SELECT id, title, workspace, parent_section, updated_at FROM pages "
            "WHERE parent_section != 'Trash'"
        )
        params = []
        if ws_key:
            base_query += " AND workspace=?"
            params.append(ws_key)
        base_query += " ORDER BY updated_at DESC"
        rows = conn.execute(base_query, params).fetchall()

    def to_page(r):
        r = dict(r)
        return {
            "id": f"page/{r['id']}",
            "name": r["title"] or "Untitled",
            "icon": "📄",
            "url": f"/pages/{r['id']}",
            "created_by": "You",
            "source": r.get("workspace") or "🔒 Private",
            "last_edited": r.get("updated_at", "now"),
            "last_visited": r.get("updated_at", "now"),
            "section": r.get("parent_section", "Private"),
        }

    all_pages = [to_page(r) for r in rows]

    # Load favorites from DB for Library
    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
    uid = user["id"] if user and user.get("id") else 1
    with get_conn() as conn:
        fav_rows = conn.execute(
            "SELECT p.id, p.title, p.workspace, p.updated_at FROM favorites f "
            "JOIN pages p ON p.id = f.page_id "
            "WHERE f.user_id=? ORDER BY f.position", (uid,)
        ).fetchall()
    lib_favs = []
    for r in fav_rows:
        r = dict(r)
        lib_favs.append({
            "id": f"page/{r['id']}",
            "name": r["title"] or "Untitled",
            "icon": "📄",
            "url": f"/pages/{r['id']}",
            "created_by": "You",
            "source": r.get("workspace") or "🔒 Private",
            "last_edited": r.get("updated_at", "now"),
            "last_visited": r.get("updated_at", "now"),
        })

    # Catégoriser par parent_section — sidebar data intacte
    sidebar["lib_recent"] = all_pages
    sidebar["lib_favorites"] = lib_favs
    sidebar["lib_shared"] = []
    sidebar["lib_private"] = [p for p in all_pages if p.get("section") == "Private"]
    sidebar["lib_has_favorites"] = len(lib_favs) > 0
    sidebar["lib_has_shared"] = False

    template = env.get_template("library.html")
    return template.render(**sidebar)


@router.get("/pages/{page_id}", response_class=HTMLResponse)
async def view_page_root(request: Request, page_id: int):
    """Render a Markdown page at root level with workspace context."""
    from jinja2 import Environment, FileSystemLoader
    from app.routers.board import _sidebar_data as board_sidebar
    env = Environment(loader=FileSystemLoader("app/templates"))
    with get_conn() as conn:
        row = conn.execute("SELECT * FROM pages WHERE id=?", (page_id,)).fetchone()
        if not row:
            return HTMLResponse("<h2>Page not found</h2>", status_code=404)
    page = dict(row)
    ws = page.get("workspace", "")
    parts = ws.split("/") if "/" in ws else ["", ""]
    owner, repo = parts[0], parts[1] if len(parts) > 1 else ""
    sidebar = board_sidebar(request, owner, repo)
    # Load sub-pages
    with get_conn() as conn:
        subs = conn.execute(
            "SELECT id, title FROM pages WHERE parent_id=? ORDER BY updated_at DESC",
            (page_id,),
        ).fetchall()
    ctx = {**sidebar, "page": page, "sub_pages": [dict(s) for s in subs],
           "page_favorited": False,
           "page_share_mode": page.get("share_mode", "private"),
           "page_published": bool(page.get("published", 0)),
           "page_data": {"id": page_id, "title": page.get("title"), "content_format": page.get("content_format", "blocks"), "content": page.get("content", ""), "favorited": False, "share_mode": page.get("share_mode", "private"), "published": bool(page.get("published", 0))}}
    template = env.get_template("page_editor.html")
    response = template.render(**ctx)
    return HTMLResponse(content=response, headers={"Cache-Control": "no-store, max-age=0"})


@router.get("/accounts", response_class=HTMLResponse)
async def accounts_page(request: Request):
    """Account management panel."""
    from jinja2 import Environment, FileSystemLoader
    env = Environment(loader=FileSystemLoader("app/templates"))
    sidebar = _sidebar_data(request, [])
    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
    with get_conn() as conn:
        users = conn.execute("SELECT * FROM users ORDER BY created_at DESC").fetchall()
    ctx = {**sidebar, "user": user, "users": [dict(u) for u in users]}
    template = env.get_template("accounts.html")
    return template.render(**ctx)


@router.get("/accounts/settings", response_class=HTMLResponse)
async def settings_page(request: Request):
    """User settings page — profile, forges, tokens."""
    from jinja2 import Environment, FileSystemLoader
    env = Environment(loader=FileSystemLoader("app/templates"))
    sidebar = _sidebar_data(request, [])
    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
    if not user:
        from fastapi.responses import RedirectResponse
        return RedirectResponse("/auth/login?provider=local", status_code=302)
    # Check forge connections
    gitea_connected = False
    github_connected = False
    if user.get("id"):
        with get_conn() as conn:
            tokens = conn.execute(
                "SELECT provider FROM user_oauth_tokens WHERE user_id=?", (user["id"],)
            ).fetchall()
            for t in tokens:
                if t["provider"] == "gitea":
                    gitea_connected = True
                elif t["provider"] == "github":
                    github_connected = True
    ctx = {**sidebar, "user": user, "gitea_connected": gitea_connected, "github_connected": github_connected}
    template = env.get_template("settings.html")
    response = template.render(**ctx)
    return HTMLResponse(content=response)


# ═══════════ User API endpoints ═══════════

def _get_user_id(request: Request) -> int:
    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
    return user["id"] if user and user.get("id") else 1


@router.put("/api/user/profile")
async def update_profile(request: Request):
    import json
    body = await request.json()
    full_name = body.get("full_name", "").strip()
    uid = _get_user_id(request)
    with get_conn() as conn:
        conn.execute("UPDATE users SET full_name=? WHERE id=?", (full_name, uid))
        conn.commit()
    return {"status": "ok"}


@router.put("/api/user/password")
async def update_password(request: Request):
    import json
    from app.password_utils import hash_password
    body = await request.json()
    password = body.get("password", "").strip()
    if len(password) < 6:
        return {"error": "Password must be at least 6 characters"}
    uid = _get_user_id(request)
    with get_conn() as conn:
        conn.execute("UPDATE users SET password_hash=? WHERE id=?", (hash_password(password), uid))
        conn.commit()
    return {"status": "ok"}


@router.post("/api/user/token")
async def generate_token(request: Request):
    import secrets
    uid = _get_user_id(request)
    token = secrets.token_hex(32)
    with get_conn() as conn:
        conn.execute(
            "INSERT OR REPLACE INTO user_tokens (gitea_user_id, gitea_token, updated_at) VALUES (?, ?, CURRENT_TIMESTAMP)",
            (uid, token),
        )
        conn.commit()
    return {"token": f"fd_{token}"}


@router.delete("/api/user/forge/{provider}")
async def disconnect_forge(request: Request, provider: str):
    uid = _get_user_id(request)
    with get_conn() as conn:
        conn.execute(
            "DELETE FROM user_oauth_tokens WHERE user_id=? AND provider=?", (uid, provider)
        )
        conn.commit()
    return {"status": "ok"}


@router.get("/", response_class=HTMLResponse)
async def dashboard(
    request: Request,
    search: str = Query(default=""),
    show_archived: bool = Query(default=False),
):
    auth = _get_user_or_redirect(request)
    if isinstance(auth, RedirectResponse):
        return auth
    try:
        repos = await gitea.get_user_repos(page=1, limit=50)
        if search:
            q = search.lower()
            repos = [r for r in repos if q in r.get("full_name", "").lower()
                     or q in (r.get("description") or "").lower()]
        if not show_archived:
            repos = [r for r in repos if not r.get("archived", False)]
        repos.sort(key=lambda r: r.get("updated_at", ""), reverse=True)
    except Exception as e:
        logger.error("Dashboard error: %s", e)
        repos = []

    from jinja2 import Environment, FileSystemLoader
    env = Environment(loader=FileSystemLoader("app/templates"))
    sidebar = _sidebar_data(request, repos)
    template = env.get_template("dashboard.html")
    return template.render(request=request, repos=repos, search=search,
                           show_archived=show_archived, **sidebar)


# ═══════════ Workspace ═══════════

@router.get("/workspace", response_class=HTMLResponse)
async def workspace_page(request: Request):
    """Unified workspace showing all projects."""
    from jinja2 import Environment, FileSystemLoader
    env = Environment(loader=FileSystemLoader("app/templates"))
    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}
    template = env.get_template("workspace.html")
    return template.render(**ctx)


@router.get("/api/workspace/projects")
async def list_workspace_projects(request: Request):
    """List all projects: built-in + Gitea + GitHub."""
    builtin = []
    with get_conn() as conn:
        rows = conn.execute(
            "SELECT id, title FROM pages WHERE parent_id IS NULL ORDER BY updated_at DESC LIMIT 20"
        ).fetchall()
        for r in rows:
            count = conn.execute("SELECT COUNT(*) FROM pages WHERE parent_id=?", (r["id"],)).fetchone()[0]
            builtin.append({"id": str(r["id"]), "name": r["title"] or "Untitled", "pageCount": count, "forge": "builtin"})

    gitea_repos = []
    try:
        repos = await gitea.get_user_repos(page=1, limit=50)
        for repo in repos:
            gitea_repos.append({
                "id": str(repo.get("id", "")),
                "name": repo.get("name", ""),
                "full_name": repo.get("full_name", ""),
                "description": repo.get("description", ""),
                "html_url": repo.get("html_url", ""),
                "language": repo.get("language", ""),
                "forge": "gitea",
            })
    except Exception:
        pass

    return {"builtin": builtin, "gitea": gitea_repos, "github": []}


@router.post("/api/workspace/projects")
async def create_workspace_project(request: Request):
    import json
    body = await request.json()
    name = body.get("name", "").strip()
    if not name:
        return {"error": "Name required"}
    with get_conn() as conn:
        cursor = conn.execute(
            "INSERT INTO pages (workspace, title, content, content_format, parent_section) VALUES ('', ?, '', 'blocks', 'Private')",
            (name,),
        )
        conn.commit()
        pid = cursor.lastrowid
    return {"id": pid, "name": name, "forge": "builtin"}