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

from datetime import datetime, timezone
from urllib.parse import parse_qs, urlencode

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, blocker_filter_summary, dashboard_summary, installation_view, list_blockers, list_installations, list_jobs, list_panel_events
from .human_auth import create_session, current_session, require_csrf, verify_password
from .panel_presentation import format_ui_datetime
from .models import AdminUser, Agent, AgentSnapshot, 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)

    def query_base(**values):
        return urlencode({key: value for key, value in values.items() if value not in (None, "")})

    def date_filter(value, *, end_of_day=False):
        if not value:
            return None
        try:
            parsed = datetime.fromisoformat(value)
            if parsed.tzinfo is None:
                parsed = parsed.replace(tzinfo=timezone.utc)
            return parsed.replace(hour=23, minute=59, second=59, microsecond=999999) if end_of_day and len(value) == 10 else parsed
        except ValueError:
            return None

    @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, sort: str = "display_name"):
        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, sort=sort), "auth": auth_data, "search": search or "", "health_filter": health or "", "sort": sort, "query_base": query_base(search=search, health=health, sort=sort)})
        finally: session.close()

    @routes.get("/agents/{agent_id}", response_class=HTMLResponse)
    def agent_detail(request: Request, agent_id: int, tab: str = "overview", event_page: int = 1, severity: str | None = None, event_type: str | None = None, job_id: int | None = None, product_code: str | None = None, since: str | None = None, until: str | None = None):
        session, auth_data, redirect = page_auth(request)
        if redirect: return redirect
        try:
            row = session.execute(select(Installation, Agent, Tenant, AgentSnapshot).join(Agent, Agent.id == Installation.agent_id).join(Tenant, Tenant.id == Installation.tenant_id).outerjoin(AgentSnapshot, AgentSnapshot.installation_id == Installation.id).where(Agent.id == agent_id)).first()
            if row is None: return HTMLResponse("Agent not found", status_code=404)
            installation, agent, tenant, snapshot = row
            detail = installation_view(installation, agent, tenant, snapshot)
            event_page = max(1, event_page)
            events = list_panel_events(session, installation.id, page=event_page, page_size=25, include_more=True, severity=severity, event_type=event_type, job_id=job_id, product_code=product_code, since=date_filter(since), until=date_filter(until, end_of_day=True))
            has_more = len(events) > 25
            events = events[:25]
            for event in events:
                event["occurred_display"] = format_ui_datetime(datetime.fromisoformat(event["occurred_at"]) if event["occurred_at"] else None)
            agent_blockers = list_blockers(session, tenant_id=installation.tenant_id, agent_id=agent_id, page=1, page_size=25)
            return render(request, "agent_detail.html", {"detail": detail, "tab": tab, "blockers": agent_blockers, "blocker_breakdown": blocker_filter_summary(session, tenant_id=installation.tenant_id, agent_id=agent_id, status="OPEN")["blocker_breakdown"], "jobs": list_jobs(session, agent_id=agent_id, page=1, page_size=25), "events": events, "event_page": max(1, event_page), "has_more": has_more, "severity": severity or "", "event_type": event_type or "", "job_id": job_id or "", "product_code": product_code or "", "since": since or "", "until": until or "", "event_query_base": query_base(tab=tab, severity=severity, event_type=event_type, job_id=job_id, product_code=product_code, since=since, until=until), "auth": auth_data, "csrf_token": request.cookies.get("gti_csrf", "")})
        finally: session.close()

    @routes.get("/agents/{agent_id}/reprocess-confirmation", response_class=HTMLResponse)
    def reprocess_confirmation(request: Request, agent_id: int):
        session, auth_data, redirect = page_auth(request)
        if redirect: return redirect
        try:
            if not session.scalar(select(Agent.id).where(Agent.id == agent_id)):
                return HTMLResponse("Agent not found", status_code=404)
            return render(request, "reprocess_confirmation.html", {"agent_id": agent_id, "auth": auth_data})
        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 render(request, "reprocess_confirmation.html", {"agent_id": agent_id, "auth": auth_data, "error": "Confirme explicitamente o reprocessamento."}, 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, client: str | None = None, installation: str | None = None, field: str | None = None, blocker_type: str | None = None, status: str = "OPEN", age: str | None = None, search: str | None = None, agent_id: int | None = None, product_code: str | None = None):
        session, auth_data, redirect = page_auth(request)
        if redirect: return redirect
        try:
            filters = {"agent_id": agent_id, "product_code": product_code, "client": client, "installation": installation, "field": field, "blocker_type": blocker_type, "status": status, "age": age, "search": search}
            result = list_blockers(session, page=page, page_size=50, **filters)
            summary = blocker_filter_summary(session, **filters)
            return render(request, "blockers.html", {"result": result, "summary": summary, "auth": auth_data, "csrf_token": request.cookies.get("gti_csrf", ""), "client_filter": client or "", "installation_filter": installation or "", "field_filter": field or "", "blocker_type_filter": blocker_type or "", "status_filter": status or "OPEN", "age_filter": age or "", "search": search or "", "query_base": query_base(**filters)})
        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, search: str | None = None, kind: str | None = None, job_id: int | 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, search=search, kind=kind, job_id=job_id), "auth": auth_data, "status_filter": status or "", "search": search or "", "kind_filter": kind or "", "query_base": query_base(status=status, search=search, kind=kind, job_id=job_id)})
        finally: session.close()

    return routes