"""
DungeonMaster AI - Game State Models

Pydantic models for game entities including events, combat state,
characters, NPCs, scenes, and adventure data.
"""

from __future__ import annotations

import uuid
from datetime import datetime
from enum import Enum
from typing import Optional

from pydantic import BaseModel, Field, computed_field


# =============================================================================
# Enums
# =============================================================================


class EventType(str, Enum):
    """Types of game events for logging."""

    ROLL = "roll"
    COMBAT_START = "combat_start"
    COMBAT_END = "combat_end"
    COMBAT_ACTION = "combat_action"
    DAMAGE = "damage"
    HEALING = "healing"
    MOVEMENT = "movement"
    DIALOGUE = "dialogue"
    DISCOVERY = "discovery"
    ITEM_ACQUIRED = "item_acquired"
    REST = "rest"
    LEVEL_UP = "level_up"
    DEATH = "death"
    STORY_FLAG = "story_flag"
    SYSTEM = "system"


class CombatantStatus(str, Enum):
    """Status of a combatant in combat."""

    ACTIVE = "active"
    UNCONSCIOUS = "unconscious"
    DEAD = "dead"
    FLED = "fled"


class HPStatus(str, Enum):
    """Health status based on HP percentage."""

    HEALTHY = "healthy"  # > 50%
    WOUNDED = "wounded"  # 25-50%
    CRITICAL = "critical"  # 1-25%
    UNCONSCIOUS = "unconscious"  # 0


# =============================================================================
# Event Models
# =============================================================================


class SessionEvent(BaseModel):
    """
    A single event in the game session.

    Events are logged for context building and session history.
    """

    event_id: str = Field(
        default_factory=lambda: str(uuid.uuid4()),
        description="Unique event identifier",
    )
    event_type: EventType = Field(
        description="Type of event",
    )
    description: str = Field(
        description="Human-readable event description",
    )
    data: dict[str, object] = Field(
        default_factory=dict,
        description="Event-specific data",
    )
    timestamp: datetime = Field(
        default_factory=datetime.now,
        description="When the event occurred",
    )
    turn: int = Field(
        default=0,
        description="Game turn when event occurred",
    )
    is_significant: bool = Field(
        default=False,
        description="Whether this event is significant for context",
    )


# =============================================================================
# Combat Models
# =============================================================================


class Combatant(BaseModel):
    """
    A participant in combat.

    Tracks initiative, HP, conditions, and status.
    """

    combatant_id: str = Field(
        description="Unique combatant identifier",
    )
    name: str = Field(
        description="Combatant name",
    )
    initiative: int = Field(
        description="Initiative roll result",
    )
    is_player: bool = Field(
        default=False,
        description="Whether this is a player character",
    )
    hp_current: int = Field(
        default=0,
        description="Current hit points",
    )
    hp_max: int = Field(
        default=1,
        description="Maximum hit points",
    )
    armor_class: int = Field(
        default=10,
        description="Armor class",
    )
    conditions: list[str] = Field(
        default_factory=list,
        description="Active conditions",
    )
    status: CombatantStatus = Field(
        default=CombatantStatus.ACTIVE,
        description="Combat status",
    )

    @computed_field
    @property
    def hp_percent(self) -> float:
        """HP as percentage of max."""
        if self.hp_max <= 0:
            return 0.0
        return (self.hp_current / self.hp_max) * 100.0

    @computed_field
    @property
    def hp_status(self) -> HPStatus:
        """Health status based on HP percentage."""
        if self.hp_current <= 0:
            return HPStatus.UNCONSCIOUS
        pct = self.hp_percent
        if pct > 50:
            return HPStatus.HEALTHY
        if pct > 25:
            return HPStatus.WOUNDED
        return HPStatus.CRITICAL

    @computed_field
    @property
    def is_bloodied(self) -> bool:
        """Whether combatant is at 50% HP or below."""
        return self.hp_percent <= 50.0


class CombatState(BaseModel):
    """
    State of an active combat encounter.

    Tracks round, turn order, and all combatants.
    """

    combat_id: str = Field(
        default_factory=lambda: str(uuid.uuid4()),
        description="Unique combat identifier",
    )
    round_number: int = Field(
        default=1,
        description="Current combat round",
    )
    turn_index: int = Field(
        default=0,
        description="Index of current combatant in turn order",
    )
    combatants: list[Combatant] = Field(
        default_factory=list,
        description="All combatants in initiative order",
    )
    started_at: datetime = Field(
        default_factory=datetime.now,
        description="When combat started",
    )

    @computed_field
    @property
    def current_combatant(self) -> Optional[Combatant]:
        """Get the combatant whose turn it is."""
        if not self.combatants or self.turn_index >= len(self.combatants):
            return None
        return self.combatants[self.turn_index]

    @computed_field
    @property
    def turn_order(self) -> list[str]:
        """List of combatant names in initiative order."""
        return [c.name for c in self.combatants]

    @computed_field
    @property
    def active_combatants(self) -> list[Combatant]:
        """List of combatants still active in combat."""
        return [c for c in self.combatants if c.status == CombatantStatus.ACTIVE]

    @computed_field
    @property
    def is_player_turn(self) -> bool:
        """Whether it's currently a player's turn."""
        current = self.current_combatant
        return current.is_player if current else False

    def advance_turn(self) -> Optional[Combatant]:
        """
        Advance to the next turn, skipping inactive combatants.

        Returns:
            The new current combatant, or None if combat should end.
        """
        if not self.active_combatants:
            return None

        # Find next active combatant
        start_index = self.turn_index
        attempts = 0
        max_attempts = len(self.combatants)

        while attempts < max_attempts:
            self.turn_index = (self.turn_index + 1) % len(self.combatants)

            # Check for new round
            if self.turn_index == 0:
                self.round_number += 1

            current = self.combatants[self.turn_index]
            if current.status == CombatantStatus.ACTIVE:
                return current

            attempts += 1

        return None

    def get_combatant(self, combatant_id: str) -> Optional[Combatant]:
        """Get a combatant by ID."""
        for c in self.combatants:
            if c.combatant_id == combatant_id:
                return c
        return None

    def update_combatant(self, combatant_id: str, **updates: object) -> bool:
        """
        Update a combatant's attributes.

        Args:
            combatant_id: ID of combatant to update
            **updates: Attribute updates

        Returns:
            True if combatant was found and updated
        """
        for i, c in enumerate(self.combatants):
            if c.combatant_id == combatant_id:
                updated_data = c.model_dump()
                updated_data.update(updates)
                self.combatants[i] = Combatant.model_validate(updated_data)
                return True
        return False


# =============================================================================
# Character Models
# =============================================================================


class CharacterSnapshot(BaseModel):
    """
    Cached snapshot of character data from MCP.

    Used for quick access without hitting MCP on every request.
    """

    character_id: str = Field(
        description="Character ID from MCP",
    )
    name: str = Field(
        description="Character name",
    )
    race: str = Field(
        default="Unknown",
        description="Character race",
    )
    character_class: str = Field(
        default="Unknown",
        description="Character class",
    )
    level: int = Field(
        default=1,
        description="Character level",
    )
    hp_current: int = Field(
        default=0,
        description="Current hit points",
    )
    hp_max: int = Field(
        default=1,
        description="Maximum hit points",
    )
    armor_class: int = Field(
        default=10,
        description="Armor class",
    )
    initiative_bonus: int = Field(
        default=0,
        description="Initiative modifier",
    )
    speed: int = Field(
        default=30,
        description="Movement speed in feet",
    )
    conditions: list[str] = Field(
        default_factory=list,
        description="Active conditions",
    )
    ability_scores: dict[str, int] = Field(
        default_factory=lambda: {
            "strength": 10,
            "dexterity": 10,
            "constitution": 10,
            "intelligence": 10,
            "wisdom": 10,
            "charisma": 10,
        },
        description="Ability scores",
    )
    proficiency_bonus: int = Field(
        default=2,
        description="Proficiency bonus",
    )
    cached_at: datetime = Field(
        default_factory=datetime.now,
        description="When this snapshot was created",
    )

    @computed_field
    @property
    def hp_percent(self) -> float:
        """HP as percentage of max."""
        if self.hp_max <= 0:
            return 0.0
        return (self.hp_current / self.hp_max) * 100.0

    @computed_field
    @property
    def hp_status(self) -> HPStatus:
        """Health status based on HP percentage."""
        if self.hp_current <= 0:
            return HPStatus.UNCONSCIOUS
        pct = self.hp_percent
        if pct > 50:
            return HPStatus.HEALTHY
        if pct > 25:
            return HPStatus.WOUNDED
        return HPStatus.CRITICAL

    @computed_field
    @property
    def is_bloodied(self) -> bool:
        """Whether character is at 50% HP or below."""
        return self.hp_percent <= 50.0

    @classmethod
    def from_mcp_result(cls, data: dict[str, object]) -> CharacterSnapshot:
        """
        Create a CharacterSnapshot from MCP get_character result.

        Args:
            data: Raw result from mcp_get_character

        Returns:
            CharacterSnapshot instance
        """
        # Handle nested character data
        char_data = data.get("character", data)

        # Extract ability scores
        ability_scores = {}
        raw_abilities = char_data.get("ability_scores", {})
        if isinstance(raw_abilities, dict):
            for ability in [
                "strength",
                "dexterity",
                "constitution",
                "intelligence",
                "wisdom",
                "charisma",
            ]:
                ability_scores[ability] = int(raw_abilities.get(ability, 10))
        else:
            ability_scores = {
                "strength": 10,
                "dexterity": 10,
                "constitution": 10,
                "intelligence": 10,
                "wisdom": 10,
                "charisma": 10,
            }

        return cls(
            character_id=str(char_data.get("id", "")),
            name=str(char_data.get("name", "Unknown")),
            race=str(char_data.get("race", "Unknown")),
            character_class=str(char_data.get("character_class", "Unknown")),
            level=int(char_data.get("level", 1)),
            hp_current=int(char_data.get("current_hp", char_data.get("hp_current", 0))),
            hp_max=int(char_data.get("max_hp", char_data.get("hp_max", 1))),
            armor_class=int(char_data.get("armor_class", 10)),
            initiative_bonus=int(char_data.get("initiative_bonus", 0)),
            speed=int(char_data.get("speed", 30)),
            conditions=list(char_data.get("conditions", [])),
            ability_scores=ability_scores,
            proficiency_bonus=int(char_data.get("proficiency_bonus", 2)),
        )


# =============================================================================
# NPC and Scene Models
# =============================================================================


class NPCInfo(BaseModel):
    """
    Information about an NPC.

    Includes personality, voice, and dialogue hooks.
    """

    npc_id: str = Field(
        description="Unique NPC identifier",
    )
    name: str = Field(
        description="NPC name",
    )
    description: str = Field(
        default="",
        description="Physical and role description",
    )
    personality: str = Field(
        default="",
        description="Personality traits",
    )
    voice_profile: str = Field(
        default="dm",
        description="Voice profile for TTS",
    )
    dialogue_hooks: list[str] = Field(
        default_factory=list,
        description="Sample dialogue lines",
    )
    monster_stat_block: Optional[str] = Field(
        default=None,
        description="Monster stat block name if applicable",
    )
    relationship: str = Field(
        default="neutral",
        description="Relationship to players (friendly, neutral, hostile)",
    )


class SceneInfo(BaseModel):
    """
    Information about a location/scene.

    Includes description, sensory details, exits, and present NPCs.
    """

    scene_id: str = Field(
        description="Unique scene identifier",
    )
    name: str = Field(
        description="Scene/location name",
    )
    description: str = Field(
        default="",
        description="Scene description",
    )
    sensory_details: dict[str, str] = Field(
        default_factory=dict,
        description="Sensory details (sight, sound, smell)",
    )
    exits: dict[str, str] = Field(
        default_factory=dict,
        description="Available exits (direction -> destination scene_id)",
    )
    npcs_present: list[str] = Field(
        default_factory=list,
        description="NPC IDs present in scene",
    )
    items: list[dict[str, object]] = Field(
        default_factory=list,
        description="Items in the scene",
    )
    encounter_id: Optional[str] = Field(
        default=None,
        description="Encounter ID if scene has combat",
    )
    searchable_objects: list[dict[str, object]] = Field(
        default_factory=list,
        description="Objects that can be searched/investigated",
    )


# =============================================================================
# Save/Load Models
# =============================================================================


class GameSaveData(BaseModel):
    """
    Complete game state for save/load.

    Includes all state needed to restore a game session.
    """

    version: str = Field(
        default="1.0.0",
        description="Save file version",
    )
    saved_at: datetime = Field(
        default_factory=datetime.now,
        description="When the game was saved",
    )
    session_id: str = Field(
        description="Game session ID",
    )
    turn_count: int = Field(
        default=0,
        description="Current turn count",
    )
    party_ids: list[str] = Field(
        default_factory=list,
        description="Character IDs in party",
    )
    active_character_id: Optional[str] = Field(
        default=None,
        description="Currently active character ID",
    )
    character_snapshots: list[CharacterSnapshot] = Field(
        default_factory=list,
        description="Cached character data",
    )
    current_location: str = Field(
        default="Unknown",
        description="Current location name",
    )
    current_scene: Optional[SceneInfo] = Field(
        default=None,
        description="Current scene data",
    )
    in_combat: bool = Field(
        default=False,
        description="Whether combat is active",
    )
    combat_state: Optional[CombatState] = Field(
        default=None,
        description="Combat state if in combat",
    )
    story_flags: dict[str, object] = Field(
        default_factory=dict,
        description="Story/quest progress flags",
    )
    known_npcs: dict[str, NPCInfo] = Field(
        default_factory=dict,
        description="NPCs encountered (id -> info)",
    )
    recent_events: list[SessionEvent] = Field(
        default_factory=list,
        description="Recent session events",
    )
    adventure_name: Optional[str] = Field(
        default=None,
        description="Loaded adventure name",
    )
    conversation_history: list[dict[str, object]] = Field(
        default_factory=list,
        description="Chat history for restoration",
    )


# =============================================================================
# Adventure Models
# =============================================================================


class AdventureMetadata(BaseModel):
    """
    Metadata for an adventure module.
    """

    name: str = Field(
        description="Adventure name",
    )
    description: str = Field(
        default="",
        description="Adventure description",
    )
    difficulty: str = Field(
        default="medium",
        description="Difficulty level (easy, medium, hard)",
    )
    estimated_time: str = Field(
        default="1-2 hours",
        description="Estimated play time",
    )
    recommended_level: int = Field(
        default=1,
        description="Recommended character level",
    )
    tags: list[str] = Field(
        default_factory=list,
        description="Adventure tags",
    )
    author: str = Field(
        default="DungeonMaster AI",
        description="Adventure author",
    )
    version: str = Field(
        default="1.0.0",
        description="Adventure version",
    )


class EncounterData(BaseModel):
    """
    Data for a combat encounter.
    """

    encounter_id: str = Field(
        description="Unique encounter identifier",
    )
    name: str = Field(
        description="Encounter name",
    )
    description: str = Field(
        default="",
        description="Encounter description",
    )
    enemies: list[dict[str, object]] = Field(
        default_factory=list,
        description="Enemy definitions [{monster, count, name?}]",
    )
    difficulty: str = Field(
        default="medium",
        description="Encounter difficulty",
    )
    tactics: str = Field(
        default="",
        description="Enemy tactics description",
    )
    rewards: dict[str, object] = Field(
        default_factory=dict,
        description="Rewards (xp, loot)",
    )


class AdventureData(BaseModel):
    """
    Complete adventure data loaded from JSON.
    """

    metadata: AdventureMetadata = Field(
        description="Adventure metadata",
    )
    starting_scene: dict[str, object] = Field(
        description="Starting scene configuration",
    )
    scenes: list[dict[str, object]] = Field(
        default_factory=list,
        description="All scenes in the adventure",
    )
    npcs: list[dict[str, object]] = Field(
        default_factory=list,
        description="NPC definitions",
    )
    encounters: list[EncounterData] = Field(
        default_factory=list,
        description="Combat encounters",
    )
    loot_tables: list[dict[str, object]] = Field(
        default_factory=list,
        description="Loot table definitions",
    )
    victory_conditions: dict[str, object] = Field(
        default_factory=dict,
        description="Win conditions",
    )
    completion_narrative: str = Field(
        default="",
        description="Narrative text when adventure is completed",
    )

    @classmethod
    def from_json(cls, data: dict[str, object]) -> AdventureData:
        """
        Create AdventureData from raw JSON data.

        Args:
            data: Parsed JSON adventure data

        Returns:
            AdventureData instance
        """
        # Parse metadata
        metadata_raw = data.get("metadata", {})
        if isinstance(metadata_raw, dict):
            metadata = AdventureMetadata.model_validate(metadata_raw)
        else:
            metadata = AdventureMetadata(name="Unknown Adventure")

        # Parse encounters
        encounters_raw = data.get("encounters", [])
        encounters = []
        if isinstance(encounters_raw, list):
            for enc in encounters_raw:
                if isinstance(enc, dict):
                    encounters.append(EncounterData.model_validate(enc))

        return cls(
            metadata=metadata,
            starting_scene=dict(data.get("starting_scene", {})),
            scenes=list(data.get("scenes", [])),
            npcs=list(data.get("npcs", [])),
            encounters=encounters,
            loot_tables=list(data.get("loot_tables", [])),
            victory_conditions=dict(data.get("victory_conditions", {})),
            completion_narrative=str(data.get("completion_narrative", "")),
        )

    def get_scene(self, scene_id: str) -> Optional[dict[str, object]]:
        """Get a scene by ID."""
        for scene in self.scenes:
            if isinstance(scene, dict) and scene.get("scene_id") == scene_id:
                return scene
        return None

    def get_npc(self, npc_id: str) -> Optional[dict[str, object]]:
        """Get an NPC by ID."""
        for npc in self.npcs:
            if isinstance(npc, dict) and npc.get("npc_id") == npc_id:
                return npc
        return None

    def get_encounter(self, encounter_id: str) -> Optional[EncounterData]:
        """Get an encounter by ID."""
        for enc in self.encounters:
            if enc.encounter_id == encounter_id:
                return enc
        return None