"""MiniFam — gradio.Server entry point.

This serves a custom React frontend (the Dia-styled design under `frontend/`)
and exposes the local agent + Markdown store as queued JSON endpoints the
frontend calls with `@gradio/client`.

  GET  /            -> the React app (frontend/index.html)
  /app/*           -> static assets (CSS, JSX)
  api "chat"       -> one agent turn (live model + tools), with tool-call cards
  api "recipes"    -> the recipe box as JSON
  api "notes"      -> a member's notes as JSON
  api "meal_plan"  -> the weekly plan + shopping list as JSON

Everything runs on this machine: the model is an OpenAI-compatible endpoint
(Ollama in dev, llama.cpp later) and all data lives in local Markdown files.

The classic Gradio Blocks UI is preserved in app_blocks.py.
"""

from pathlib import Path

import gradio as gr
from fastapi.responses import HTMLResponse
from fastapi.staticfiles import StaticFiles

from minifam import agent, bootstrap, calendar_store, config, llm, serialize

FRONTEND = Path(__file__).resolve().parent / "frontend"

app = gr.Server(title="MiniFam")

# On a Hugging Face GPU Space, stand up a local Ollama server (no Docker) so the
# agent reaches it at localhost:11434 just like in dev. No-op locally — only
# runs when MINIFAM_BOOTSTRAP_OLLAMA=1 is set on the Space. Returns immediately;
# the model downloads in the background while the UI comes up.
bootstrap.ensure_ollama()

# ZeroGPU scans this, the main app module, for an @spaces.GPU function at startup.
# It's already imported transitively via `agent` → `llm`, but bind it here too so
# the decorated function is unmistakably present in app.py's own namespace.
if llm.BACKEND == "zerogpu":
    from minifam.llm_zerogpu import _generate as _gpu_generate  # noqa: F401


class NoCacheStaticFiles(StaticFiles):
    """Serve the frontend with caching off so edits show up on reload."""

    async def get_response(self, path, scope):
        response = await super().get_response(path, scope)
        response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
        return response


# --- Tool-call cards ---------------------------------------------------------
# Map each real tool the agent runs to the "agent working" card the Chat screen
# shows: an icon, a friendly label, and a short status verb.
_TOOL_CARDS = {
    "add_note":               ("notes",   "Wrote to notes",         "Saved"),
    "list_notes":             ("notes",   "Read the notes",         "Read"),
    "add_recipe":             ("recipes", "Saved a recipe",         "Saved"),
    "import_recipe_from_url": ("recipes", "Fetched the page",       "Read"),
    "list_recipes":           ("recipes", "Checked the recipe box", "Read"),
    "get_recipe":             ("recipes", "Looked up a recipe",     "Read"),
    "search_recipes":         ("recipes", "Searched recipes",       "Read"),
    "save_meal_plan":         ("meals",   "Saved the meal plan",    "Saved"),
    "get_meal_plan":          ("meals",   "Checked the meal plan",  "Read"),
    "generate_shopping_list": ("cart",    "Built the shopping list","Ready"),
    "add_member":             ("user",    "Added a family member",  "Saved"),
    "set_food_preferences":   ("user",    "Updated food preferences", "Saved"),
    "list_members":           ("user",    "Checked the family",     "Read"),
    "add_event":              ("calendar","Added an event",         "Saved"),
    "add_task":               ("check",   "Added a task",           "Saved"),
    "list_calendar":          ("calendar","Checked the calendar",   "Read"),
    "complete_task":          ("check",   "Checked off a task",     "Done"),
}

# Calendar tools whose card offers an "Add to Google Calendar" button.
_GCAL_TOOLS = {"add_event": "Add event to Google Calendar",
               "add_task": "Add task to Google Calendar"}


def _gcal_from_args(name: str, args: dict) -> str:
    """Build the Google Calendar link for a just-created event/task card."""
    return calendar_store.gcal_url(
        {
            "title": args.get("title"),
            "date": args.get("date"),
            "time": args.get("time"),
            "end": args.get("end_time"),
            "members": args.get("members"),
            "details": args.get("details"),
            "type": "task" if name == "add_task" else "event",
        }
    )


def _card(event: dict) -> dict:
    kind, label, ok = _TOOL_CARDS.get(
        event["name"], ("sparkle", event["name"], "Done")
    )
    rows = [
        [str(k).replace("_", " ").title(), str(v)[:80]]
        for k, v in (event.get("args") or {}).items()
    ][:3]
    # `name` lets the frontend react to roster-changing turns (refresh members).
    card = {"name": event["name"], "kind": kind, "label": label, "ok": ok, "rows": rows}
    if event["name"] in _GCAL_TOOLS:
        card["gcalUrl"] = _gcal_from_args(event["name"], event.get("args") or {})
        card["gcalLabel"] = _GCAL_TOOLS[event["name"]]
    return card


# --- API endpoints -----------------------------------------------------------
@app.api(name="chat")
def chat(message: str, member: str = "elena", history: list | None = None) -> dict:
    """Run one agent turn. Returns the reply, the tool cards, and updated history."""
    history = history or []
    convo = history + [{"role": "user", "content": message}]
    events: list[dict] = []
    try:
        reply, convo = agent.run_agent(convo, member, events=events)
    except Exception as e:  # surface model/backend issues gracefully in the UI
        # While the Space is still downloading/starting the model, say so
        # instead of the generic error (warmup_message() is None locally).
        reply = bootstrap.warmup_message() or (
            f"I couldn't reach the local model ({e}). Is it running?"
        )
        return {"reply": reply, "tools": [], "history": history}
    if not (reply or "").strip():
        # Small models sometimes emit only reasoning; never show a blank bubble.
        reply = "Done." if events else "I'm not sure how to help with that — could you rephrase?"
    return {"reply": reply, "tools": [_card(e) for e in events], "history": convo}


@app.api(name="recipes")
def recipes() -> list:
    """The whole recipe box as structured cards."""
    return serialize.recipes()


@app.api(name="notes")
def notes() -> list:
    """The shared family notes, projected as note cards."""
    return serialize.notes()


@app.api(name="meal_plan")
def meal_plan() -> dict:
    """The latest weekly plan plus a shopping list built from its recipes."""
    return serialize.meal_plan()


@app.api(name="members")
def members() -> list:
    """The family roster as avatar-ready cards."""
    return serialize.members()


@app.api(name="add_member")
def add_member(name: str, food_preferences: str = "") -> dict:
    """Add a family member and return the full updated roster."""
    config.add_member(name, food_preferences=food_preferences)
    return {"members": serialize.members()}


@app.api(name="remove_member")
def remove_member(member: str) -> dict:
    """Remove a family member by id and return the full updated roster."""
    config.remove_member(member)
    return {"members": serialize.members()}


@app.api(name="calendar")
def calendar() -> list:
    """The family calendar (events + tasks) as UI-ready items."""
    return serialize.calendar()


@app.api(name="set_task_done")
def set_task_done(item: str, done: bool = True) -> dict:
    """Check/uncheck a task by id; return the updated calendar."""
    calendar_store.set_done(item, done)
    return {"calendar": serialize.calendar()}


@app.api(name="remove_calendar_item")
def remove_calendar_item(item: str) -> dict:
    """Remove an event/task by id; return the updated calendar."""
    calendar_store.remove_item(item)
    return {"calendar": serialize.calendar()}


# --- Static frontend ---------------------------------------------------------
app.mount("/app", NoCacheStaticFiles(directory=str(FRONTEND / "app")), name="assets")


@app.get("/", response_class=HTMLResponse)
def index() -> str:
    return (FRONTEND / "index.html").read_text(encoding="utf-8")


if __name__ == "__main__":
    app.launch(server_name="0.0.0.0", server_port=7860, show_error=True)