"""
modules/conversation.py — FRIDAY Continuous Conversation Engine

REMOVES THE WAKE WORD BARRIER:
- Free-talk mode - no "hey FRIDAY" needed
- Context carries across turns
- Intent detection, not just commands
- Seamless multi-turn conversations
"""

import time
import json
import os
from config import DATA_DIR


CONV_FILE = os.path.join(DATA_DIR, "conversation.json")


def _load() -> dict:
    if not os.path.exists(CONV_FILE):
        return {"mode": "command", "context": {}, "last_intent": "", "free_talk": False}
    try:
        with open(CONV_FILE, "r") as f:
            return json.load(f)
    except Exception:
        return {"mode": "command", "context": {}, "last_intent": "", "free_talk": False}


def _save(data: dict):
    os.makedirs(DATA_DIR, exist_ok=True)
    try:
        with open(CONV_FILE, "w") as f:
            json.dump(data, f, indent=2)
    except Exception:
        pass


# ── Mode Control ────────────────────────────────────────────────────────

def enable_free_talk(enabled: bool = True):
    """Enable/disable free-talk mode."""
    data = _load()
    data["free_talk"] = enabled
    data["mode"] = "free_talk" if enabled else "command"
    _save(data)


def is_free_talk() -> bool:
    """Check if free-talk is enabled."""
    return _load().get("free_talk", False)


def get_mode() -> str:
    """Get current conversation mode."""
    return _load().get("mode", "command")


# ── Intent Detection ────────────────────────────────────────────

def detect_intent(text: str) -> str:
    """Detect intent from text."""
    t = (text or "").lower()

    # Question intents
    if any(w in t for w in ["what", "how", "why", "when", "where", "which", "?"]):
        return "question"

    # Command intents
    if any(t.startswith(w) for w in ["open", "close", "start", "stop", "play", "pause", "set", "turn"]):
        return "command"

    # Request intents
    if any(w in t for w in ["can you", "please", "would you", "could", "help me"]):
        return "request"

    # Statement intents
    if any(w in t for w in ["i am", "i'm", "feeling", "working on", "doing"]):
        return "statement"

    # Opinion intents
    if any(w in t for w in ["think", "believe", "opinion", "should i"]):
        return "opinion"

    # Greeting intents
    if any(w in t for w in ["hey", "hi", "hello", "yo", "bro"]):
        return "greeting"

    # Emotional intents
    if any(w in t for w in ["frustrated", "annoyed", "happy", "excited", "sad", "tired"]):
        return "emotion"

    return "statement"


# ── Context Management ────────────────────────────────────────────

def set_context(key: str, value):
    """Set conversation context."""
    data = _load()
    data.setdefault("context", {})[key] = value
    _save(data)


def get_context(key: str):
    """Get conversation context."""
    return _load().get("context", {}).get(key)


def clear_context():
    """Clear conversation context."""
    data = _load()
    data["context"] = {}
    _save(data)


# ── Multi-turn Continuation ─────────────────────────────────────────

def is_follow_up(text: str) -> bool:
    """Check if this is a follow-up to previous turn."""
    t = (text or "").lower()

    # Follow-up words
    follow_ups = ["that", "it", "them", "this", "also", "and", "but", "again", "more", "yes", "no", "ok", "sure"]

    # Pronouns that need context
    pronouns = ["it", "that", "this", "them", "they", "he", "she", "you", "we"]

    # Check for follow-up patterns
    first_word = t.split()[0] if t.split() else ""

    if first_word in follow_ups:
        return True

    # Short responses that need context
    if len(t.split()) <= 3 and first_word in pronouns:
        return True

    return False


def get_follow_up_context() -> dict:
    """Get context needed for follow-up."""
    data = _load()
    return data.get("context", {})


# ── Should Respond ─────────────────────────────────────────────────

def should_respond(text: str) -> bool:
    """Decide if FRIDAY should respond without wake word."""
    # Check free-talk mode
    if not is_free_talk():
        return False

    t = (text or "").strip()
    if not t:
        return False

    # Check for name mentions
    if "friday" in t.lower() or "jarvis" in t.lower():
        return True

    # Check for direct address
    if any(t.lower().startswith(w) for w in ["hey", "hi", "yo", "bro", "ok"]):
        return True

    # Follow-ups always respond
    if is_follow_up(t):
        return True

    # Check for question
    if "?" in t:
        return True

    # Short commands without wake word
    if detect_intent(t) == "command" and len(t.split()) <= 4:
        return True

    return False


# ── Natural Response Generation ────────────────────────────────────────

def get_natural_response(intent: str, context: dict) -> str:
    """Generate natural response based on intent."""
    responses = {
        "question": [
            "Good question. Let me think.",
            "Here's what I know:",
            "Let me look into that.",
        ],
        "command": [
            "On it.",
            "Done.",
            "Consider it done.",
        ],
        "request": [
            "Got it.",
            "Sure thing.",
            "I'll handle it.",
        ],
        "statement": [
            "Interesting.",
            "Got it.",
            "Noted.",
        ],
        "emotion": [
            "I hear you.",
            "Got it.",
            "I'm here.",
        ],
    }

    intents = responses.get(intent, responses["statement"])
    import random
    return random.choice(intents)


# ── Brain Integration ─────────────────────────────────────────

def prepare_for_brain(text: str) -> dict:
    """Prepare conversation context for brain."""
    intent = detect_intent(text)
    data = _load()

    # Update context
    data["last_intent"] = intent
    data["last_text"] = text
    data["last_time"] = time.time()
    _save(data)

    return {
        "mode": get_mode(),
        "intent": intent,
        "context": get_follow_up_context(),
        "is_follow_up": is_follow_up(text),
        "should_respond": should_respond(text),
    }


# ── Toggle via Command ──────────────────────────────────────────

def toggle_free_talk_command(enable: bool = None) -> str:
    """Toggle free-talk mode via voice command."""
    if enable is None:
        enable = not is_free_talk()

    enable_free_talk(enable)

    if enable:
        return "Free talk enabled. Just talk to me."
    else:
        return "Free talk disabled. Say my name to get my attention."