"""Server-rendered operator pages for the GTI Fiscal control panel."""

from urllib.parse import parse_qs

from fastapi import APIRouter, Request
from fastapi.responses import HTMLResponse, RedirectResponse
from fastapi.templating import Jinja2Templates
from sqlalchemy import select

from .config import settings
from .blocker_resolution import _company_key, resolve_blocker_with_context
from .context_keys import ALLOWED_KEYS, ENUMS
from .control_plane import blocker_detail, dashboard_summary, list_blockers, list_installations, list_jobs, list_panel_events
from .human_auth import create_session, current_session, require_csrf, verify_password
from .models import AdminUser, Agent, BlockedProduct, FiscalContextEntry, Installation, Job, Tenant
from .jobs import create_job
from .audit import record_audit


def router(session_factory):
    routes = APIRouter()
    templates = Jinja2Templates(directory="central/templates")

    def auth(request, session):
        return current_session(request, session)

    def render(request, template, context=None, status_code=200):
        values = {"request": request, "csrf_token": request.cookies.get("gti_csrf", ""), **(context or {})}
        return templates.TemplateResponse(request=request, name=template, context=values, status_code=status_code)

    @routes.get("/login", response_class=HTMLResponse)
    def login_page(request: Request):
        return render(request, "login.html", {"error": None})

    @routes.post("/login")
    async def login(request: Request):
        values = {key: items[0] for key, items in parse_qs((await request.body()).decode()).items() if items}
        with session_factory() as session:
            admin = session.scalar(select(AdminUser).where(AdminUser.username == values.get("username", "").strip().lower()))
            if not admin or not admin.is_active or not verify_password(values.get("password", ""), admin.password_hash):
                return render(request, "login.html", {"error": "Credenciais inválidas"}, 401)
            token, csrf = create_session(session, admin, request)
        response = RedirectResponse("/", status_code=303)
        response.set_cookie(settings.web_cookie_name, token, max_age=settings.web_session_seconds, httponly=True, secure=settings.web_cookie_secure, samesite="lax")
        response.set_cookie("gti_csrf", csrf, max_age=settings.web_session_seconds, httponly=False, secure=settings.web_cookie_secure, samesite="lax")
        return response

    @routes.post("/logout")
    async def logout(request: Request):
        with session_factory() as session:
            web_session, admin = current_session(request, session)
            if web_session:
                values = await form_values(request)
                require_csrf(web_session, values.get("csrf_token"))
                session.delete(web_session); session.commit()
        response = RedirectResponse("/login", status_code=303)
        response.delete_cookie(settings.web_cookie_name); response.delete_cookie("gti_csrf")
        return response

    def page_auth(request):
        session = session_factory()
        web_session, admin = current_session(request, session)
        if not admin:
            session.close(); return None, None, RedirectResponse("/login", status_code=303)
        return session, (web_session, admin), None

    async def form_values(request):
        return {key: items[0] for key, items in parse_qs((await request.body()).decode()).items() if items}

    @routes.get("/", response_class=HTMLResponse)
    def dashboard(request: Request):
        session, auth_data, redirect = page_auth(request)
        if redirect: return redirect
        try: return render(request, "dashboard.html", {"summary": dashboard_summary(session), "auth": auth_data})
        finally: session.close()

    @routes.get("/agents", response_class=HTMLResponse)
    def agents(request: Request, page: int = 1, search: str | None = None, health: str | None = None):
        session, auth_data, redirect = page_auth(request)
        if redirect: return redirect
        try: return render(request, "agents.html", {"result": list_installations(session, page=page, page_size=50, search=search, health=health), "auth": auth_data, "search": search or "", "health_filter": health or ""})
        finally: session.close()

    @routes.get("/agents/{agent_id}", response_class=HTMLResponse)
    def agent_detail(request: Request, agent_id: int, tab: str = "overview"):
        session, auth_data, redirect = page_auth(request)
        if redirect: return redirect
        try:
            result = list_installations(session, page=1, page_size=100)
            detail = next((item for item in result["items"] if item["agent_id"] == agent_id), None)
            if detail is None: return HTMLResponse("Agent not found", status_code=404)
            installation = session.scalar(select(Installation).where(Installation.agent_id == agent_id))
            return render(request, "agent_detail.html", {"detail": detail, "tab": tab, "blockers": list_blockers(session, tenant_id=installation.tenant_id, agent_id=agent_id, page=1, page_size=25), "jobs": list_jobs(session, agent_id=agent_id, page=1, page_size=25), "events": list_panel_events(session, installation.id, page=1, page_size=25), "auth": auth_data, "csrf_token": request.cookies.get("gti_csrf", "")})
        finally: session.close()

    @routes.post("/agents/{agent_id}/reprocess")
    async def reprocess_agent(request: Request, agent_id: int):
        session, auth_data, redirect = page_auth(request)
        if redirect: return redirect
        try:
            values = await form_values(request); web_session, admin = auth_data
            require_csrf(web_session, values.get("csrf_token"))
            if values.get("confirm") != "yes": return HTMLResponse("confirmation required", status_code=400)
            agent = session.get(Agent, agent_id)
            installation = session.scalar(select(Installation).where(Installation.agent_id == agent_id))
            if not agent or not installation: return HTMLResponse("Agent not found", status_code=404)
            existing = next((candidate for candidate in session.scalars(select(Job).where(Job.agent_id == agent.id, Job.kind == "REPROCESS_ALL", Job.status == "PENDING")).all() if candidate.payload == {}), None)
            job = existing or create_job(session, agent, "REPROCESS_ALL", {})
            record_audit(session, admin_user_id=admin.id, tenant_id=installation.tenant_id, action="REPROCESS_ALL", target_type="installation", target_id=installation.installation_id, context={"job_id": job.id})
            session.commit()
            return RedirectResponse(f"/agents/{agent_id}?tab=jobs", status_code=303)
        finally: session.close()

    @routes.get("/blockers", response_class=HTMLResponse)
    def blockers(request: Request, page: int = 1, blocker_type: str | None = None):
        session, auth_data, redirect = page_auth(request)
        if redirect: return redirect
        try: return render(request, "blockers.html", {"result": list_blockers(session, page=page, page_size=50, blocker_type=blocker_type), "auth": auth_data, "csrf_token": request.cookies.get("gti_csrf", "")})
        finally: session.close()

    @routes.get("/blockers/{blocker_id}", response_class=HTMLResponse)
    def blocker_page(request: Request, blocker_id: int):
        session, auth_data, redirect = page_auth(request)
        if redirect: return redirect
        try:
            detail = blocker_detail(session, blocker_id)
            if detail is None: return HTMLResponse("Blocker not found", status_code=404)
            blocker = session.get(BlockedProduct, blocker_id)
            installation = session.get(Installation, blocker.installation_id) if blocker.installation_id else None
            tenant = session.get(Tenant, blocker.tenant_id)
            company_key = _company_key(blocker, installation, tenant)
            current_context = session.scalars(select(FiscalContextEntry).where(FiscalContextEntry.tenant_id == blocker.tenant_id, FiscalContextEntry.company_key == company_key)).all()
            value_choices = sorted({value for values in ENUMS.values() for value in values})
            return render(request, "blocker_detail.html", {"detail": detail, "auth": auth_data, "context_entries": current_context, "context_keys": sorted(ALLOWED_KEYS), "value_choices": value_choices, "error": None})
        finally: session.close()

    @routes.post("/blockers/{blocker_id}/resolve-context")
    async def resolve_blocker_with_context_route(request: Request, blocker_id: int):
        session, auth_data, redirect = page_auth(request)
        if redirect: return redirect
        try:
            values = await form_values(request); web_session, admin = auth_data
            require_csrf(web_session, values.get("csrf_token"))
            payload = {key: values.get(key) for key in ("scope", "scope_key", "key", "value", "reason")}
            try:
                resolve_blocker_with_context(session, blocker_id, admin, payload, request_ip=request.client.host if request.client else None)
            except LookupError:
                return HTMLResponse("Blocker not found", status_code=404)
            except ValueError as error:
                detail = blocker_detail(session, blocker_id)
                return render(request, "blocker_detail.html", {"detail": detail, "auth": auth_data, "context_entries": [], "context_keys": sorted(ALLOWED_KEYS), "value_choices": sorted({value for values in ENUMS.values() for value in values}), "error": str(error)}, 422)
            return RedirectResponse(f"/blockers/{blocker_id}", status_code=303)
        finally:
            session.close()

    @routes.get("/jobs", response_class=HTMLResponse)
    def jobs(request: Request, page: int = 1, status: str | None = None):
        session, auth_data, redirect = page_auth(request)
        if redirect: return redirect
        try: return render(request, "jobs.html", {"result": list_jobs(session, page=page, page_size=50, status=status), "auth": auth_data})
        finally: session.close()

    return routes