"""
DungeonMaster AI - Combat Tracker Component

Turn order display with HP tracking and condition management.
"""

from __future__ import annotations

from dataclasses import dataclass
from pathlib import Path
from typing import TYPE_CHECKING

import gradio as gr

from ui import styles
from ui.utils.portrait_mapper import get_combatant_portrait

if TYPE_CHECKING:
    pass


# =============================================================================
# Portrait Constants
# =============================================================================

MONSTERS_PATH = Path(__file__).parent.parent / "assets" / "images" / "portraits" / "monsters"
IMAGE_EXTENSIONS = (".webp", ".jpg", ".jpeg", ".png")


def get_default_monster_portrait() -> str | None:
    """Get default monster portrait path."""
    for ext in IMAGE_EXTENSIONS:
        default_path = MONSTERS_PATH / f"default{ext}"
        if default_path.exists():
            return str(default_path)
    return None


# =============================================================================
# Data Models
# =============================================================================


@dataclass
class Combatant:
    """A participant in combat."""

    id: str
    name: str
    initiative: int
    hp_current: int
    hp_max: int
    armor_class: int
    conditions: list[str]
    is_player: bool
    is_current_turn: bool = False
    portrait_path: str | None = None

    @classmethod
    def from_dict(cls, data: dict[str, object], is_current: bool = False) -> "Combatant":
        """Create from dictionary."""
        # Get portrait for this combatant
        portrait = get_combatant_portrait(data)
        if not portrait:
            portrait = get_default_monster_portrait()

        return cls(
            id=str(data.get("id", data.get("character_id", ""))),
            name=str(data.get("name", "Unknown")),
            initiative=int(data.get("initiative", 0)),
            hp_current=int(data.get("hp_current", data.get("current_hp", 0))),
            hp_max=int(data.get("hp_max", data.get("max_hp", 1))),
            armor_class=int(data.get("armor_class", data.get("ac", 10))),
            conditions=list(data.get("conditions", [])),
            is_player=bool(data.get("is_player", False)),
            is_current_turn=is_current,
            portrait_path=portrait,
        )


@dataclass
class CombatState:
    """Current combat state."""

    round_number: int
    turn_order: list[Combatant]
    current_turn_index: int
    is_active: bool

    @classmethod
    def from_dict(cls, data: dict[str, object] | None) -> "CombatState | None":
        """Create from dictionary."""
        if not data:
            return None

        turn_order_data = data.get("turn_order", [])
        current_idx = int(data.get("current_turn_index", data.get("current_turn", 0)))

        combatants = []
        for i, c_data in enumerate(turn_order_data):
            combatant = Combatant.from_dict(c_data, is_current=i == current_idx)
            combatants.append(combatant)

        return cls(
            round_number=int(data.get("round", data.get("round_number", 1))),
            turn_order=combatants,
            current_turn_index=current_idx,
            is_active=bool(data.get("is_active", True)),
        )


# =============================================================================
# Formatting Helpers
# =============================================================================


def get_hp_percentage(current: int, maximum: int) -> float:
    """Calculate HP percentage."""
    if maximum <= 0:
        return 100.0
    return (current / maximum) * 100


def get_hp_color_class(percentage: float) -> str:
    """Get HP bar color class based on percentage."""
    if percentage > 50:
        return "hp-bar-healthy"
    elif percentage > 25:
        return "hp-bar-wounded"
    else:
        return "hp-bar-critical"


def format_combatant_row(combatant: Combatant) -> str:
    """Format a single combatant row with inline styles."""
    hp_pct = get_hp_percentage(combatant.hp_current, combatant.hp_max)
    hp_color_class = get_hp_color_class(hp_pct)

    # Base row style
    row_style = (
        "display: flex; "
        "align-items: center; "
        "gap: 8px; "
        "padding: 8px 12px; "
        "margin: 4px 0; "
        "border-radius: 6px; "
        "background: rgba(30, 26, 18, 0.6); "
    )

    # Add type indicator (ally=blue, enemy=red border)
    if combatant.is_player:
        row_style += "border-left: 3px solid #4a9eff; "
    else:
        row_style += f"border-left: 3px solid {styles.BLOOD_RED_LIGHT}; "

    # Highlight current turn
    if combatant.is_current_turn:
        row_style += styles.current_turn_style()

    # Initiative style
    init_style = f"min-width: 24px; text-align: center; font-weight: bold; color: {styles.GOLD};"

    # Name style
    name_style = f"flex: 1; color: {styles.PARCHMENT}; font-weight: {'bold' if combatant.is_current_turn else 'normal'};"
    turn_indicator = "▶ " if combatant.is_current_turn else ""

    # Portrait HTML
    portrait_html = ""
    if combatant.portrait_path:
        border_color = "#4a9eff" if combatant.is_player else "#ff4a4a"
        portrait_style = (
            f"width: 32px; height: 32px; border-radius: 50%; object-fit: cover; "
            f"border: 2px solid {border_color}; "
            f"box-shadow: 0 2px 4px rgba(0,0,0,0.3);"
        )
        portrait_html = f'<img src="file={combatant.portrait_path}" alt="{combatant.name}" style="{portrait_style}">'

    # HP bar with inline styles
    hp_bar_container = (
        "position: relative; "
        "width: 70px; "
        "height: 16px; "
        "background: rgba(0, 0, 0, 0.4); "
        "border-radius: 8px; "
        "overflow: hidden; "
    )

    # HP fill color based on status
    if hp_color_class == "hp-bar-healthy":
        fill_color = f"linear-gradient(90deg, {styles.EMERALD_DARK}, {styles.EMERALD})"
    elif hp_color_class == "hp-bar-wounded":
        fill_color = f"linear-gradient(90deg, #d68910, {styles.STATUS_YELLOW})"
    else:
        fill_color = f"linear-gradient(90deg, #922b21, {styles.STATUS_RED})"

    hp_fill_style = f"height: 100%; width: {hp_pct}%; background: {fill_color}; border-radius: 6px;"
    hp_text_style = (
        "position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); "
        "font-size: 10px; font-weight: bold; color: white; text-shadow: 1px 1px 2px rgba(0,0,0,0.8);"
    )

    hp_bar_html = f'''
    <div style="{hp_bar_container}">
        <div style="{hp_fill_style}"></div>
        <span style="{hp_text_style}">{combatant.hp_current}/{combatant.hp_max}</span>
    </div>
    '''

    # Conditions badges with inline styles
    conditions_html = ""
    if combatant.conditions:
        badges = []
        for condition in combatant.conditions[:3]:
            badge_css = styles.condition_badge_style(condition)
            badges.append(f'<span style="{badge_css}">{condition}</span>')
        conditions_html = f'<div style="display: flex; gap: 4px; flex-wrap: wrap;">{"".join(badges)}</div>'

    return f'''
<div style="{row_style}">
    <span style="{init_style}">{combatant.initiative}</span>
    {portrait_html}
    <span style="{name_style}">{turn_indicator}{combatant.name}</span>
    {hp_bar_html}
    {conditions_html}
</div>
'''


def format_combat_display(combat_state: CombatState | None) -> str:
    """Format the full combat tracker display with inline styles."""
    inactive_style = (
        "text-align: center; "
        "padding: 1.5rem; "
        f"color: {styles.PARCHMENT_MUTED}; "
        "font-style: italic;"
    )

    if not combat_state or not combat_state.is_active:
        return f'''
<div style="{inactive_style}">
    <div>Not in combat</div>
    <div style="font-size: 0.85rem; margin-top: 0.5rem;">Combat tracker will appear here when initiative is rolled.</div>
</div>
'''

    # Container style
    container_style = (
        f"background: linear-gradient(180deg, rgba(42, 26, 26, 0.8) 0%, rgba(26, 16, 16, 0.8) 100%); "
        f"border: 2px solid {styles.BLOOD_RED}; "
        "border-radius: 10px; "
        "padding: 1rem; "
        f"box-shadow: 0 4px 12px rgba(139, 35, 50, 0.3);"
    )

    # Header style
    header_style = (
        f"color: {styles.BLOOD_RED_LIGHT}; "
        "font-size: 1.1rem; "
        "font-weight: bold; "
        f"border-bottom: 1px solid {styles.BLOOD_RED}; "
        "padding-bottom: 0.5rem; "
        "margin-bottom: 0.75rem;"
    )

    html_parts = [
        f'<div style="{container_style}">',
        f'<div style="{header_style}">Combat - Round {combat_state.round_number}</div>',
    ]

    for combatant in combat_state.turn_order:
        html_parts.append(format_combatant_row(combatant))

    html_parts.append("</div>")

    return "".join(html_parts)


def format_combat_summary(combat_state: CombatState | None) -> str:
    """Format a text summary of combat state."""
    if not combat_state or not combat_state.is_active:
        return "*Not in combat*"

    current = None
    if 0 <= combat_state.current_turn_index < len(combat_state.turn_order):
        current = combat_state.turn_order[combat_state.current_turn_index]

    summary_lines = [
        f"**Round {combat_state.round_number}**",
    ]

    if current:
        summary_lines.append(f"Current Turn: **{current.name}**")

    # Count allies and enemies
    allies = sum(1 for c in combat_state.turn_order if c.is_player and c.hp_current > 0)
    enemies = sum(1 for c in combat_state.turn_order if not c.is_player and c.hp_current > 0)

    summary_lines.append(f"Allies: {allies} | Enemies: {enemies}")

    return "\n".join(summary_lines)


def format_turn_order_table(combat_state: CombatState | None) -> list[list[str]]:
    """Format combat state as table data for gr.Dataframe."""
    if not combat_state or not combat_state.is_active:
        return []

    rows = []
    for combatant in combat_state.turn_order:
        current_marker = "▶" if combatant.is_current_turn else ""
        type_marker = "🛡️" if combatant.is_player else "👹"
        hp_display = f"{combatant.hp_current}/{combatant.hp_max}"
        conditions = ", ".join(combatant.conditions) if combatant.conditions else "-"

        rows.append([
            current_marker,
            str(combatant.initiative),
            f"{type_marker} {combatant.name}",
            hp_display,
            conditions,
        ])

    return rows


# =============================================================================
# Component Creation
# =============================================================================


def create_combat_panel() -> tuple[
    gr.Group,     # combat_group (for visibility toggle)
    gr.Markdown,  # combat_header
    gr.HTML,      # combat_display (changed from Markdown)
    gr.Markdown,  # combat_summary
    gr.Button,    # next_turn_btn
    gr.Button,    # end_combat_btn
]:
    """
    Create the combat tracker panel component.

    Returns:
        Tuple of all Gradio components for event wiring.
    """
    with gr.Group(visible=True, elem_classes=["combat-tracker-container"]) as combat_group:
        # Header
        combat_header = gr.Markdown("## ⚔️ Combat Tracker")

        # Combat display (HTML format for styling)
        combat_display = gr.HTML(
            value=format_combat_display(None),
        )

        # Combat summary (text format)
        combat_summary = gr.Markdown(
            value=format_combat_summary(None),
        )

        # Action buttons
        with gr.Row():
            next_turn_btn = gr.Button(
                "Next Turn",
                variant="primary",
                size="sm",
                interactive=False,  # Disabled when not in combat
            )
            end_combat_btn = gr.Button(
                "End Combat",
                variant="stop",
                size="sm",
                interactive=False,  # Disabled when not in combat
            )

    return (
        combat_display,
        combat_summary,
        next_turn_btn,
        end_combat_btn,
        combat_group,  # combat_container
    )


# =============================================================================
# Update Functions
# =============================================================================


def update_combat_tracker(
    combat_state_dict: dict[str, object] | None,
) -> tuple[gr.update, str, str, gr.update, gr.update]:
    """
    Update combat tracker from game state.

    Args:
        combat_state_dict: Combat state dictionary from GameState

    Returns:
        Tuple of component updates (visibility, display, summary, btn states)
    """
    combat_state = CombatState.from_dict(combat_state_dict)

    is_active = combat_state is not None and combat_state.is_active

    return (
        gr.update(visible=True),  # Always show group, just change content
        format_combat_display(combat_state),
        format_combat_summary(combat_state),
        gr.update(interactive=is_active),  # Next turn button
        gr.update(interactive=is_active),  # End combat button
    )


def set_combat_visibility(in_combat: bool) -> gr.update:
    """
    Set combat tracker visibility.

    Args:
        in_combat: Whether currently in combat

    Returns:
        gr.update with visibility setting
    """
    # We always show the tracker but display different content
    return gr.update(visible=True)


async def handle_next_turn(
    toolkit_client: object,
    game_state: object,
) -> tuple[str, str]:
    """
    Handle next turn button click.

    Args:
        toolkit_client: TTRPGToolkitClient instance
        game_state: Current GameState

    Returns:
        Tuple of (combat_display, combat_summary)
    """
    try:
        # Call MCP next_turn tool
        result = await toolkit_client.call_tool("next_turn", {})

        # Parse result and update display
        combat_state = CombatState.from_dict(result)

        return (
            format_combat_display(combat_state),
            format_combat_summary(combat_state),
        )
    except Exception as e:
        return (
            f"Error advancing turn: {e!s}",
            "*Combat state unknown*",
        )


async def handle_end_combat(
    toolkit_client: object,
    game_state: object,
) -> tuple[str, str, gr.update, gr.update]:
    """
    Handle end combat button click.

    Args:
        toolkit_client: TTRPGToolkitClient instance
        game_state: Current GameState

    Returns:
        Tuple of (combat_display, combat_summary, next_btn, end_btn)
    """
    try:
        # Call MCP end_combat tool
        await toolkit_client.call_tool("end_combat", {})

        return (
            format_combat_display(None),
            format_combat_summary(None),
            gr.update(interactive=False),
            gr.update(interactive=False),
        )
    except Exception as e:
        return (
            f"Error ending combat: {e!s}",
            "*Combat state unknown*",
            gr.update(interactive=True),
            gr.update(interactive=True),
        )