"""Vista Overview: tarjeta con tags clave en vivo (Sprint 6)."""

from __future__ import annotations

from PySide6.QtCore import Qt
from PySide6.QtWidgets import (
    QFrame,
    QGridLayout,
    QHBoxLayout,
    QLabel,
    QScrollArea,
    QVBoxLayout,
    QWidget,
)

from vmssailor.studio.theme import (
    C_CYAN,
    C_FOAM,
    C_FOG,
    C_MIDNIGHT,
    C_OK,
    C_STEEL,
    C_WARN,
    mono_font,
    ui_font,
)


class _TagTile(QFrame):
    """Tarjeta visual con valor en vivo de un tag."""

    def __init__(self, tag_id: str, description: str, unit: str) -> None:
        super().__init__()
        self._tag_id = tag_id
        self._unit = unit
        self.setObjectName("tagTile")
        self.setStyleSheet(
            f"#tagTile {{ background: {C_MIDNIGHT}; "
            f"border: 1px solid {C_STEEL}; border-radius: 8px; }}"
        )
        layout = QVBoxLayout(self)
        layout.setContentsMargins(14, 12, 14, 12)
        layout.setSpacing(2)

        self._desc_label = QLabel(description or tag_id)
        self._desc_label.setFont(ui_font(9))
        self._desc_label.setStyleSheet(f"color: {C_FOG}; letter-spacing: 1.5px;")
        layout.addWidget(self._desc_label)

        self._id_label = QLabel(tag_id)
        self._id_label.setFont(mono_font(9))
        self._id_label.setStyleSheet(f"color: {C_CYAN};")
        layout.addWidget(self._id_label)

        self._value_label = QLabel("—")
        self._value_label.setFont(mono_font(20))
        self._value_label.setStyleSheet(f"color: {C_FOAM}; font-weight: 600;")
        layout.addWidget(self._value_label)

        self._meta_label = QLabel("sin datos")
        self._meta_label.setFont(mono_font(8))
        self._meta_label.setStyleSheet(f"color: {C_FOG};")
        layout.addWidget(self._meta_label)

    def update_value(self, value, quality: str, timestamp: str) -> None:
        value_str = f"{value:.2f}" if isinstance(value, float) else str(value)
        self._value_label.setText(f"{value_str} {self._unit}")
        ts_short = timestamp[-12:-3] if timestamp else "—"
        self._meta_label.setText(f"q={quality} · {ts_short}")
        color = C_OK if quality == "good" else C_WARN
        self._meta_label.setStyleSheet(f"color: {color};")


class OverviewView(QWidget):
    """Grid de tiles con tags clave."""

    def __init__(self, parent: QWidget | None = None) -> None:
        super().__init__(parent)
        self._tiles: dict[str, _TagTile] = {}

        outer = QVBoxLayout(self)
        outer.setContentsMargins(20, 20, 20, 20)
        outer.setSpacing(12)

        title_row = QHBoxLayout()
        self._title = QLabel("Overview")
        self._title.setFont(ui_font(20))
        self._title.setStyleSheet(f"color: {C_FOAM}; font-weight: 600;")
        title_row.addWidget(self._title)
        title_row.addStretch(1)
        self._tag_count_label = QLabel("0 tags")
        self._tag_count_label.setFont(mono_font(10))
        self._tag_count_label.setStyleSheet(f"color: {C_FOG};")
        title_row.addWidget(self._tag_count_label)
        outer.addLayout(title_row)

        scroll = QScrollArea()
        scroll.setWidgetResizable(True)
        scroll.setFrameShape(QFrame.Shape.NoFrame)
        outer.addWidget(scroll, 1)

        grid_wrapper = QWidget()
        self._grid = QGridLayout(grid_wrapper)
        self._grid.setSpacing(10)
        scroll.setWidget(grid_wrapper)

        self._empty_label = QLabel("Conecta al Runtime para ver tags en vivo (panel Conexión).")
        self._empty_label.setFont(ui_font(11))
        self._empty_label.setStyleSheet(f"color: {C_FOG};")
        self._empty_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
        self._grid.addWidget(self._empty_label, 0, 0)

    def set_project(self, project: dict) -> None:
        # Pre-popula tiles a partir de stats del proyecto (sin valores aún)
        self._title.setText(f"Overview · {project.get('name', '')}")

    def handle_event(self, event: dict) -> None:
        if event.get("type") != "tag_update":
            return
        tag_id = event.get("tag_id")
        if not tag_id:
            return
        if tag_id not in self._tiles:
            # Crear nueva tile dinámicamente
            if self._empty_label is not None:
                self._empty_label.setVisible(False)
            tile = _TagTile(tag_id, description="", unit="")
            row = len(self._tiles) // 4
            col = len(self._tiles) % 4
            self._grid.addWidget(tile, row, col)
            self._tiles[tag_id] = tile
            self._tag_count_label.setText(f"{len(self._tiles)} tags")
        self._tiles[tag_id].update_value(
            event.get("value"),
            event.get("quality", "—"),
            event.get("timestamp", ""),
        )