import os
from typing import ClassVar
from smolagents import Tool
import datetime
from PIL import Image
import pandas as pd
from prompts import SYSTEM_PROMPT
from PIL import Image
from smolagents import WikipediaSearchTool
from dotenv import load_dotenv
import time
from langchain_google_community import GoogleSearchAPIWrapper
from google import genai
from langchain_community.document_loaders import WikipediaLoader
from langchain_community.document_loaders import ArxivLoader


load_dotenv()


class AnyTypeFileAnalyzerTool(Tool):
    name: ClassVar[str] = "any_type_file_analyzer_tool"
    description: ClassVar[str] = (
        "Analyze an image or audio mp3 file using Gemini. Supports jpg, png, and mp3."
    )
    inputs: ClassVar[dict] = {
        "analysis_description": {
            "type": "string",
            "description": "Describe what you want to analyze from the file",
        },
        "file_path": {"type": "string", "description": "Path to image/audio file"},
    }
    output_type: ClassVar[str] = "string"

    def forward(self, analysis_description: str, file_path: str):

        client = genai.Client(
            api_key=os.getenv("GEMINI_API_KEY"),
        )
        try:
            file = client.files.upload(file=file_path)
        except Exception as e:
            return f"Error uploading file: {e}"

        try:
            full_description = SYSTEM_PROMPT + f"\n\n{analysis_description}"
            GENAI_MODEL = os.getenv("GENAI_MODEL")
            response = client.models.generate_content(
                model=GENAI_MODEL,
                contents=[full_description, file],
            )
            return response.text
        except Exception as e:
            return f"Error from Gemini: {e}"

    def _get_mime_type(self, file_path: str) -> str:
        if file_path.endswith(".png"):
            return "image/png"
        elif file_path.endswith(".jpg") or file_path.endswith(".jpeg"):
            return "image/jpeg"
        elif file_path.endswith(".mp3"):
            return "audio/mpeg"
        else:
            raise ValueError(
                "Unsupported file type: only .png, .jpg, .jpeg, .mp3 are supported"
            )


class CodeFileReadTool(Tool):
    name: ClassVar[str] = "read_code_file"
    description: ClassVar[str] = (
        "Read a code or text file (Python, JavaScript, Java, HTML, CSS, etc.) and return its content as a formatted code block with the correct language extension."
    )
    inputs: ClassVar[dict] = {
        "file_path": {"type": "string", "description": "Path to the code or text file"},
    }
    output_type: ClassVar[str] = "string"

    def forward(self, file_path: str):
        try:
            # Detect extension and map to language
            ext = os.path.splitext(file_path)[-1].lower()
            ext_to_lang = {
                ".py": "python",
                ".js": "javascript",
                ".java": "java",
                ".html": "html",
                ".css": "css",
                ".json": "json",
                ".txt": "",
                ".md": "markdown",
                ".c": "c",
                ".cpp": "cpp",
                ".ts": "typescript",
                ".sh": "bash",
                ".xml": "xml",
                ".yml": "yaml",
                ".yaml": "yaml",
            }
            lang = ext_to_lang.get(ext, "")

            with open(file_path, "r", encoding="utf-8") as f:
                content = f.read()

            # Format as markdown code block
            if lang:
                return f"```{lang}\n{content}\n```"
            else:
                return f"```\n{content}\n```"
        except Exception as e:
            return f"Error reading file: {e}"


class ExcelAndCSVTableInspectorTool(Tool):
    name: ClassVar[str] = "excel_csv_file_analyzer"
    description: ClassVar[str] = (
        "Load a CSV or Excel file and return table info and summary stats in Markdown format."
    )
    inputs: ClassVar[dict] = {
        "file_path": {
            "type": "string",
            "description": "Path to CSV or Excel file (.csv, .xls, .xlsx)",
        }
    }
    output_type: ClassVar[str] = "string"

    def forward(self, file_path: str):
        try:
            if file_path.endswith(".csv"):
                df = pd.read_csv(file_path)
            elif file_path.endswith(".xls") or file_path.endswith(".xlsx"):
                df = pd.read_excel(file_path)
            else:
                return "Unsupported file type. Only CSV and Excel (.xls/.xlsx) are supported."

            md = df.to_markdown(index=False, tablefmt="pipe")

            return md

        except Exception as e:
            return f"Error loading file: {str(e)}"


class YouTubeVideoAnalyzerTool(Tool):
    name: ClassVar[str] = "youtube_video_analyzer"
    description: ClassVar[str] = (
        "Given a YouTube URL, analyzes the video content using Gemini (google-genai SDK) and answers user queries about it."
    )
    inputs: ClassVar[dict] = {
        "url": {"type": "string", "description": "Full YouTube video URL"},
        "user_prompt": {
            "type": "string",
            "description": "What you want to analyze from the video content",
        },
    }
    output_type: ClassVar[str] = "string"

    def forward(self, url: str, user_prompt: str):
        api_key = os.getenv("GEMINI_API_KEY")
        if not api_key:
            return "Error: GEMINI_API_KEY environment variable is not set."
        try:
            genai.configure(api_key=api_key)
            model_name = os.getenv("GENAI_MODEL", "gemini-1.5-pro")
            model = genai.GenerativeModel(model_name)
            prompt = f"""
You are an AI video analyzer. A user wants to analyze the following YouTube video.

### Video URL
{url}

### User Request
{user_prompt}

### Instructions:
- Analyze the video content based on the user's request.
- Identify the main key thing needed to be analyzed.
- Provide the answer as per system prompt.
"""
            response = model.generate_content([prompt])
            return response.text if hasattr(response, "text") else str(response)
        except Exception as e:
            return f"Error analyzing video with Gemini: {e}"


# --- Math Tools ---
class CalculatorTool(Tool):
    name: ClassVar[str] = "calculator"
    description: ClassVar[str] = (
        "Evaluate a basic mathematical expression (supports +, -, *, /, **, %, etc.)."
    )
    inputs: ClassVar[dict] = {
        "expression": {
            "type": "string",
            "description": "A mathematical expression to evaluate",
        }
    }
    output_type: ClassVar[str] = "number"

    def forward(self, expression: str):
        # Safely evaluate the expression using ast
        import ast, operator

        # Allowed node types
        allowed_nodes = {
            ast.Expression,
            ast.BinOp,
            ast.UnaryOp,
            ast.Num,
            ast.Constant,
            ast.Add,
            ast.Sub,
            ast.Mult,
            ast.Div,
            ast.Pow,
            ast.Mod,
            ast.USub,
            ast.UAdd,
        }
        node = ast.parse(expression, mode="eval")
        for subnode in ast.walk(node):
            if type(subnode) not in allowed_nodes:
                raise ValueError(f"Unsafe or unsupported expression: {expression}")
        return eval(compile(node, "<string>", "eval"))


# Optionally, separate basic operations could be defined (e.g., add, subtract).
class AddTool(Tool):
    name: ClassVar[str] = "add"
    description: ClassVar[str] = "Add two numbers together."
    inputs: ClassVar[dict] = {
        "a": {"type": "number", "description": "First number"},
        "b": {"type": "number", "description": "Second number"},
    }
    output_type: ClassVar[str] = "number"

    def forward(self, a: float, b: float):
        return a + b


class MultiplyTool(Tool):
    name: ClassVar[str] = "multiply"
    description: ClassVar[str] = "Multiply two numbers."
    inputs: ClassVar[dict] = {
        "a": {"type": "number", "description": "First number"},
        "b": {"type": "number", "description": "Second number"},
    }
    output_type: ClassVar[str] = "number"

    def forward(self, a: float, b: float):
        return a * b


# --- Date/Time Tools ---
class DayOfWeekTool(Tool):
    name: ClassVar[str] = "day_of_week"
    description: ClassVar[str] = "Return the day of week for a given date (YYYY-MM-DD)."
    inputs: ClassVar[dict] = {
        "date": {"type": "string", "description": "Date in format YYYY-MM-DD"}
    }
    output_type: ClassVar[str] = "string"

    def forward(self, date: str):
        year, month, day = map(int, date.split("-"))
        dow = datetime.date(year, month, day).strftime("%A")
        return dow


class AddDaysTool(Tool):
    name: ClassVar[str] = "add_days"
    description: ClassVar[str] = "Add a number of days to a date (YYYY-MM-DD)."
    inputs: ClassVar[dict] = {
        "date": {"type": "string", "description": "Start date (YYYY-MM-DD)"},
        "days": {"type": "integer", "description": "Number of days to add"},
    }
    output_type: ClassVar[str] = "string"

    def forward(self, date: str, days: int):
        year, month, day = map(int, date.split("-"))
        new_date = datetime.date(year, month, day) + datetime.timedelta(days=days)
        return new_date.isoformat()


class DateDiffTool(Tool):
    name: ClassVar[str] = "date_diff"
    description: ClassVar[str] = (
        "Compute difference in days between two dates (YYYY-MM-DD)."
    )
    inputs: ClassVar[dict] = {
        "start_date": {"type": "string", "description": "First date (YYYY-MM-DD)"},
        "end_date": {"type": "string", "description": "Second date (YYYY-MM-DD)"},
    }
    output_type: ClassVar[str] = "integer"

    def forward(self, start_date: str, end_date: str):
        y1, m1, d1 = map(int, start_date.split("-"))
        y2, m2, d2 = map(int, end_date.split("-"))
        d0 = datetime.date(y1, m1, d1)
        d1 = datetime.date(y2, m2, d2)
        return abs((d1 - d0).days)


# --- Unit Conversion Tools ---
class TempConvertTool(Tool):
    name: ClassVar[str] = "convert_temperature"
    description: ClassVar[str] = "Convert temperature between Celsius and Fahrenheit."
    inputs: ClassVar[dict] = {
        "value": {"type": "number", "description": "Temperature value to convert"},
        "from_unit": {"type": "string", "description": "Unit of input ('C' or 'F')"},
    }
    output_type: ClassVar[str] = "number"

    def forward(self, value: float, from_unit: str):
        unit = from_unit.strip().upper()
        if unit == "C":
            # Celsius to Fahrenheit
            return value * 9 / 5 + 32
        elif unit == "F":
            # Fahrenheit to Celsius
            return (value - 32) * 5 / 9
        else:
            raise ValueError("Unit must be 'C' or 'F'.")


class LengthConvertTool(Tool):
    name: ClassVar[str] = "convert_length"
    description: ClassVar[str] = (
        "Convert length between kilometers, miles, meters, and feet."
    )
    inputs: ClassVar[dict] = {
        "value": {"type": "number", "description": "Length value to convert"},
        "from_unit": {
            "type": "string",
            "description": "Original unit ('km','mi','m','ft')",
        },
        "to_unit": {
            "type": "string",
            "description": "Target unit ('km','mi','m','ft')",
        },
    }
    output_type: ClassVar[str] = "number"

    def forward(self, value: float, from_unit: str, to_unit: str):
        u1 = from_unit.lower()
        u2 = to_unit.lower()
        # Convert input to meters first
        if u1 == "km":
            meters = value * 1000
        elif u1 == "m":
            meters = value
        elif u1 == "mi":
            meters = value * 1609.34
        elif u1 == "ft":
            meters = value * 0.3048
        else:
            raise ValueError("Unsupported from_unit")
        # Convert meters to target unit
        if u2 == "km":
            return meters / 1000
        if u2 == "m":
            return meters
        if u2 == "mi":
            return meters / 1609.34
        if u2 == "ft":
            return meters / 0.3048
        raise ValueError("Unsupported to_unit")


# --- Text Tools ---
class WordCountTool(Tool):
    name: ClassVar[str] = "word_count"
    description: ClassVar[str] = "Count the number of words in a text string."
    inputs: ClassVar[dict] = {"text": {"type": "string", "description": "Input text"}}
    output_type: ClassVar[str] = "integer"

    def forward(self, text: str):
        return len(text.split())


class FindTextTool(Tool):
    name: ClassVar[str] = "find_text"
    description: ClassVar[str] = (
        "Find occurrences of a substring in a text; returns count."
    )
    inputs: ClassVar[dict] = {
        "text": {"type": "string", "description": "Text to search in"},
        "query": {"type": "string", "description": "Substring to search for"},
    }
    output_type: ClassVar[str] = "integer"

    def forward(self, text: str, query: str):
        return text.count(query)


# --- List/Sequence Tools ---
class SortListTool(Tool):
    name: ClassVar[str] = "sort_list"
    description: ClassVar[str] = "Sort a list of items (numbers or strings)."
    inputs: ClassVar[dict] = {
        "items": {"type": "array", "description": "List of items to sort"}
    }
    output_type: ClassVar[str] = "array"

    def forward(self, items):
        return sorted(items)


class UniqueListTool(Tool):
    name: ClassVar[str] = "unique_list"
    description: ClassVar[str] = (
        "Return a list with duplicate items removed (preserving order)."
    )
    inputs: ClassVar[dict] = {
        "items": {"type": "array", "description": "List of items"}
    }
    output_type: ClassVar[str] = "array"

    def forward(self, items):
        seen = []
        for x in items:
            if x not in seen:
                seen.append(x)
        return seen


# --- File I/O Tools ---
class ReadFileTool(Tool):
    name: ClassVar[str] = "read_file"
    description: ClassVar[str] = "Read and return the contents of a text file."
    inputs: ClassVar[dict] = {
        "file_path": {"type": "string", "description": "Path to a text file"}
    }
    output_type: ClassVar[str] = "string"

    def forward(self, file_path: str):
        try:
            with open(file_path, "r") as f:
                return f.read()
        except FileNotFoundError:
            return f"Error: File not found: {file_path}"


class WriteFileTool(Tool):
    name: ClassVar[str] = "write_file"
    description: ClassVar[str] = "Write a string to a text file (overwrites if exists)."
    inputs: ClassVar[dict] = {
        "file_path": {"type": "string", "description": "Path to write the file"},
        "content": {"type": "string", "description": "Content to write"},
    }
    output_type: ClassVar[str] = "string"

    def forward(self, file_path: str, content: str):
        with open(file_path, "w") as f:
            f.write(content)
        return f"Wrote to {file_path}"


# --- Image Tool (stub) ---
class ImageInfoTool(Tool):
    name: ClassVar[str] = "image_info"
    description: ClassVar[str] = "Load an image and report basic info (size and mode)."
    inputs: ClassVar[dict] = {
        "image_path": {"type": "string", "description": "Path to an image file"}
    }
    output_type: ClassVar[str] = "string"

    def forward(self, image_path: str):
        try:
            img = Image.open(image_path)
            return f"Image {image_path}: size={img.size}, mode={img.mode}"
        except Exception as e:
            return f"Error loading image: {e}"


class WikipediaCustomTool(Tool):
    name: ClassVar[str] = "wikipedia_search_summary"
    description: ClassVar[str] = "Search Wikipedia and return max 3 results"
    inputs: ClassVar[dict] = {
        "query": {
            "type": "string",
            "description": "Search Query for Wikipedia",
        }
    }
    output_type: ClassVar[str] = "string"

    def forward(self, query: str) -> str:
        try:
            search_docs = WikipediaLoader(query=query, load_max_docs=3).load()
            formatted_search_docs = "\n\n---\n\n".join(
                [
                    f'<Document source="{doc.metadata["source"]}" page="{doc.metadata.get("page", "")}"/>\n{doc.page_content}\n</Document>'
                    for doc in search_docs
                ]
            )
            return {"wiki_results": formatted_search_docs}

        except Exception as e:
            return f"Error using Wikipedia API: {e}"


class ArvixSearchTool(Tool):
    name: ClassVar[str] = "arvix_search"
    description: ClassVar[str] = "Search Arvix for a query and return maximum 3 result"
    inputs: ClassVar[dict] = {
        "query": {
            "type": "string",
            "description": "Search Query for Arvix",
        }
    }
    output_type: ClassVar[str] = "string"

    def forward(self, query: str) -> str:
        try:
            search_docs = ArxivLoader(query=query, load_max_docs=3).load()
            formatted_search_docs = "\n\n---\n\n".join(
                [
                    f'<Document source="{doc.metadata["source"]}" page="{doc.metadata.get("page", "")}"/>\n{doc.page_content[:1000]}\n</Document>'
                    for doc in search_docs
                ]
            )
            return {"arvix_results": formatted_search_docs}

        except Exception as e:
            return f"Error using Arvix Tool: {e}"


class GoogleSearchTool(Tool):
    name: ClassVar[str] = "google_search"
    description: ClassVar[str] = (
        "Search the web  using Google Search Engine and return results"
    )
    inputs: ClassVar[dict] = {
        "query": {
            "type": "string",
            "description": "Search term to find information on Web",
        }
    }
    output_type: ClassVar[str] = "string"

    def forward(self, query: str) -> str:
        try:
            # Initialize Google Search API Wrapper
            google_search = GoogleSearchAPIWrapper(
                google_api_key=os.getenv("GOOGLE_API_KEY"),
                google_cse_id=os.getenv("GOOGLE_CSE_ID"),
            )

            # Perform the search
            results = google_search.results(query, num_results=5)
            if not results:
                return f"No results found for: '{query}'"

            formatted = "\n\n".join(
                f"{i+1}. **{r['title']}**\n{r['link']}\n{r['snippet']}"
                for i, r in enumerate(results)
            )

            return f"**Search Results for '{query}':**\n\n{formatted}"

        except Exception as e:
            return f"Error using Google Search API: {e}"


class AdvanceGoogleAISearchTool(Tool):
    name: ClassVar[str] = "google_ai_search"
    description: ClassVar[str] = (
        "Search the web using Google AI Search Engine and return results"
    )
    inputs: ClassVar[dict] = {
        "query": {
            "type": "string",
            "description": "Search term to find information on Web",
        }
    }
    output_type: ClassVar[str] = "string"

    def forward(self, query: str) -> str:
        try:
            client = genai.Client(api_key=os.getenv("GEMINI_API_KEY"))
            response = client.models.generate_content(
                model=os.getenv("GENAI_MODEL"),
                contents=[query],
            )

            if not response:
                return f"No results found for: '{query}'"

            return f"**Search Results for '{query}':**\n\n{response.text}"

        except Exception as e:
            return f"Error using Google AI Search API: {e}"


# List of all available tools
agent_tools = [
    AnyTypeFileAnalyzerTool(),
    ExcelAndCSVTableInspectorTool(),
    YouTubeVideoAnalyzerTool(),
    CalculatorTool(),
    AddTool(),
    MultiplyTool(),
    DayOfWeekTool(),
    AddDaysTool(),
    DateDiffTool(),
    TempConvertTool(),
    LengthConvertTool(),
    WordCountTool(),
    FindTextTool(),
    SortListTool(),
    UniqueListTool(),
    GoogleSearchTool(),
    WikipediaCustomTool(),
    ArvixSearchTool(),
    AdvanceGoogleAISearchTool(),
]