# app/gui/dashboard.py
from __future__ import annotations
import tkinter as tk
from tkinter import ttk

class DashboardView:
    def __init__(self, parent, sim, refresh_ms: int = 250):
        self.sim = sim
        self.frame = ttk.LabelFrame(parent, text="Dashboard", padding=6)
        self.refresh_ms = refresh_ms

        cols = ("label", "value", "unit", "key", "module")
        self.tree = ttk.Treeview(self.frame, columns=cols, show="headings")
        for c, w in zip(cols, (160, 80, 40, 160, 80)):
            self.tree.heading(c, text=c.capitalize())
            self.tree.column(c, width=w, anchor="w")
        self.tree.grid(row=0, column=0, sticky="nsew")
        sb_y = ttk.Scrollbar(self.frame, orient="vertical", command=self.tree.yview)
        self.tree.configure(yscrollcommand=sb_y.set); sb_y.grid(row=0, column=1, sticky="ns")

        self.frame.columnconfigure(0, weight=1)
        self.frame.rowconfigure(0, weight=1)

        self._rows = {}
        self._tick()

    def _tick(self):
        snap = self.sim.v.dashboard_snapshot()
        specs = snap.get("specs", {})
        values = snap.get("values", {})
        # sort by priority then label
        ordered = sorted(specs.values(), key=lambda s: (s.get("priority", 100), s.get("label", s["key"])))

        seen_keys = set()
        for spec in ordered:
            k = spec["key"]; seen_keys.add(k)
            label = spec.get("label", k)
            unit  = spec.get("unit", "") or ""
            fmt   = spec.get("fmt")
            src   = spec.get("source", "")
            val   = values.get(k, "")
            if fmt and isinstance(val, (int, float)):
                try:
                    val = format(val, fmt)
                except Exception:
                    pass
            row_id = self._rows.get(k)
            row_vals = (label, val, unit, k, src)
            if row_id is None:
                row_id = self.tree.insert("", "end", values=row_vals)
                self._rows[k] = row_id
            else:
                self.tree.item(row_id, values=row_vals)

        # delete rows that disappeared
        for k, rid in list(self._rows.items()):
            if k not in seen_keys:
                try: self.tree.delete(rid)
                except Exception: pass
                self._rows.pop(k, None)

        try:
            self.frame.after(self.refresh_ms, self._tick)
        except tk.TclError:
            pass