from __future__ import annotations
from collections import defaultdict
import csv
import json
from pathlib import Path
from typing import Dict, List, Optional, Any, Tuple

from conv_data_gen.logger import setup_logger


logger = setup_logger(__name__)


def append_kv(parts: List[str], key: str, value: str, desc: str = "") -> None:
    if desc:
        parts.append(f"- {key}: {value} — {desc}")
    else:
        parts.append(f"- {key}: {value}")


def compose_user_message_for_proxy(
    user_goal: str,
    user_personality: str,
    meta_data: Any,
    user_knobs_dict: Any,
    available_tools: Optional[List[Dict[str, Any]]] = None,
    available_knowledge_bases: Optional[List[Dict[str, str]]] = None,
    agent_variables: Optional[Dict[str, Any]] = None,
) -> str:
    parts: List[str] = []
    # DEFINING USER #
    parts.append("## ABOUT THE USER ##")
    parts.append(f"USER ROLE: {meta_data.get('user_type', '')}")
    parts.append(f"USER DESCRIPTION: {user_personality}")
    parts.append(f"USER GOAL: {user_goal}")

    # DEFINING TASK#
    parts.append("## ABOUT THE TASK ##")
    parts.append(f"COMPANY: {meta_data.get('company', '')}")
    parts.append(f"USE CASE: {meta_data.get('use_case', '')}")
    parts.append(
        f"TYPE OF PERSON YOU WILL BE TALKING TO: {meta_data.get('agent_type', '')}"  # noqa
    )
    parts.append(
        f"DIRECTION OF THE CONVERSATION: {meta_data.get('conversation_direction', '')}"  # noqa
    )

    # DEFINING USER KNOBS #

    parts.append("\nKNOBS:")
    knobs = user_knobs_dict.get("knobs", {})
    knob_descriptions = user_knobs_dict.get("knob_descriptions", {})
    for k, v in knobs.items():
        append_kv(parts, k, v, knob_descriptions.get(k, ""))

    parts.append("\nLANGUAGE:")
    lang = user_knobs_dict.get("language_style", {})
    ldesc = user_knobs_dict.get("language_descriptions", {})
    append_kv(
        parts,
        "language",
        lang.get("language", ""),
        ldesc.get("language_desc", ""),
    )
    append_kv(
        parts,
        "formality",
        lang.get("formality", ""),
        ldesc.get("formality_desc", ""),
    )
    append_kv(
        parts,
        "code_switch_ratio",
        lang.get("code_switch_ratio", ""),
        ldesc.get("code_switch_desc", ""),
    )
    parts.append("  - regionalisms: " + lang.get("regionalisms", ""))

    parts.append("\nDEMOGRAPHICS:")
    demographics = user_knobs_dict.get("demographics", {})
    demographic_descriptions = user_knobs_dict.get(
        "demographic_descriptions", {}
    )
    for k, v in demographics.items():
        append_kv(parts, k, v, demographic_descriptions.get(k, ""))

    # Provide interaction complexity tier information
    parts.append("\nINTERACTION (complexity tier constraints):")
    interaction = user_knobs_dict.get("interaction", {})
    if interaction.get("tier_name"):
        parts.append(f"- tier_name: {interaction.get('tier_name', '')}")
    parts.append(
        f"- turn_range: ["
        f"{interaction.get('turn_min', '')}, "
        f"{interaction.get('turn_max', '')}]"
    )
    parts.append(
        f"- tool_calls_budget: ["
        f"{interaction.get('tool_calls_min', '')}, "
        f"{interaction.get('tool_calls_max', '')}]"
    )
    parts.append(
        f"- kb_queries_budget: ["
        f"{interaction.get('kb_queries_min', '')}, "
        f"{interaction.get('kb_queries_max', '')}]"
    )

    # DEFINING AGENT DETAILS #

    parts.append(f"YOUR VARIABLES AVAILABLE TO THE AGENT: {agent_variables}")
    parts.append(
        f"PROMPT OF THE AGENT YOU WILL BE TALKING TO: {meta_data.get('bot_prompt', '')}"  # noqa
    )
    if available_tools:
        parts.append("\nAVAILABLE_TOOLS:")
        for tool in available_tools:
            tool_name = tool.get("name", "unknown_tool")
            tool_desc = tool.get("description", "No description available")
            parts.append(f"- {tool_name}: {tool_desc}")

    # Add available knowledge bases information
    if available_knowledge_bases:
        parts.append("\nAVAILABLE_KNOWLEDGE_BASES:")
        for kb in available_knowledge_bases:
            kb_name = kb.get("name", "unknown_kb")
            kb_desc = kb.get("description", "No description available")
            parts.append(f"- {kb_name}: {kb_desc}")

    msg = "\n".join(parts)
    return msg


def save_persona_text(base_dir: Path, text: str, index: int) -> str:
    out_path = base_dir / f"persona_{index}.txt"
    out_path.write_text(text, encoding="utf-8")
    logger.info("Saved persona to %s", out_path)
    return str(out_path)


def append_persona_csv(csv_path: Path, rows: List[Dict[str, str]]) -> str:
    write_header = not csv_path.exists()
    fieldnames = sorted({k for row in rows for k in row.keys()})
    with open(csv_path, "a", encoding="utf-8", newline="") as f:
        writer = csv.DictWriter(f, fieldnames=fieldnames)
        if write_header:
            writer.writeheader()
        for row in rows:
            writer.writerow(row)
    logger.info("Appended personas CSV at %s", csv_path)
    return str(csv_path)


def read_proxy_rows(path: str) -> List[Dict[str, Any]]:
    p = Path(path)
    items: List[Dict[str, Any]] = []
    with open(p, "r", encoding="utf-8") as f:
        for line in f:
            try:
                obj = json.loads(line)
                if isinstance(obj, dict):
                    items.append({str(k): v for k, v in obj.items()})
            except Exception:
                continue
    return items


def group_by_key(
    rows: List[Dict[str, Any]],
) -> Dict[Tuple[str, str, str], List[Dict[str, Any]]]:
    groups: Dict[Tuple[str, str, str], List[Dict[str, Any]]] = defaultdict(
        list
    )
    for r in rows:
        company = str(r.get("company", ""))
        agent_type = str(r.get("agent_type", ""))
        use_case = str(r.get("use_case", ""))
        groups[(company, agent_type, use_case)].append(r)
    return groups


def select_rows_for_personas(
    groups: Dict[Tuple[str, str, str], List[Dict[str, Any]]],
    per_group: int,
) -> List[Dict[str, Any]]:
    per = max(1, int(per_group))
    selected: List[Dict[str, Any]] = []
    for _, items in groups.items():
        selected.extend(items[:per])
    return selected


def extract_flat_fields(
    spec: Dict[str, Any],
) -> Tuple[str, str, Dict[str, Any]]:
    user_desc = str(spec.get("user_description", ""))
    goal_in_conv = str(spec.get("goal_in_conversation", ""))
    bft = spec.get("big_five_traits", {})
    big_five_traits: Dict[str, Any] = bft if isinstance(bft, dict) else {}
    return user_desc, goal_in_conv, big_five_traits


def extract_user_goal(spec: Dict[str, Any]) -> str:
    return str(spec.get("goal_in_conversation", ""))


def extract_user_personality_description(spec: Dict[str, Any]) -> str:
    return str(spec.get("user_description", ""))


def extract_user_knobs(spec: Dict[str, Any]) -> str:
    return str(spec.get("knobs", ""))


def extract_meta_data(spec: Dict[str, Any]) -> str:
    meta_data = {
        "company": spec.get("company", ""),
        "use_case": spec.get("use_case", ""),
        "conversation_direction": spec.get("conversation_direction", ""),
        "agent_type": spec.get("agent_type", ""),
        "user_type": spec.get("user_type", ""),
        "bot_prompt": spec.get("bot_prompt", ""),
    }
    return meta_data


def user_knobs_to_dict(user_knobs: Any) -> Dict[str, Any]:
    sample_dict = {
        "knobs": user_knobs.knobs,
        "knob_descriptions": user_knobs.knob_descriptions,
        "language_style": user_knobs.language_style,
        "language_descriptions": user_knobs.language_descriptions,
        "demographics": user_knobs.demographics,
        "demographic_descriptions": user_knobs.demographic_descriptions,
        "interaction": user_knobs.interaction,
    }
    return sample_dict