"""Document CRUD tools — create, read, update, delete, list Frappe documents."""

import json
from mcp.types import Tool
from frappe_mcp.client.frappe_api import FrappeClient
from frappe_mcp.config import get_settings


def tools() -> list[Tool]:
    return [
        Tool(
            name="frappe_list_documents",
            description="List documents of a given DocType with optional filters.",
            inputSchema={
                "type": "object",
                "required": ["doctype"],
                "properties": {
                    "doctype": {"type": "string"},
                    "fields": {
                        "type": "array",
                        "items": {"type": "string"},
                        "description": "Fields to return. Defaults to ['name', 'modified'].",
                    },
                    "filters": {
                        "type": "array",
                        "description": "Filter list e.g. [[\"status\", \"=\", \"Open\"]]",
                    },
                    "limit": {"type": "integer", "default": 20},
                    "order_by": {"type": "string", "default": "modified desc"},
                },
            },
        ),
        Tool(
            name="frappe_get_document",
            description="Get a single Frappe document by DocType and name.",
            inputSchema={
                "type": "object",
                "required": ["doctype", "name"],
                "properties": {
                    "doctype": {"type": "string"},
                    "name": {"type": "string"},
                },
            },
        ),
        Tool(
            name="frappe_create_document",
            description="Create a new document in any DocType.",
            inputSchema={
                "type": "object",
                "required": ["doctype", "data"],
                "properties": {
                    "doctype": {"type": "string"},
                    "data": {"type": "object", "description": "Field values for the new document"},
                },
            },
        ),
        Tool(
            name="frappe_update_document",
            description="Update fields on an existing document.",
            inputSchema={
                "type": "object",
                "required": ["doctype", "name", "data"],
                "properties": {
                    "doctype": {"type": "string"},
                    "name": {"type": "string"},
                    "data": {"type": "object", "description": "Fields to update"},
                },
            },
        ),
        Tool(
            name="frappe_delete_document",
            description="Delete a document. Blocked in read-only mode.",
            inputSchema={
                "type": "object",
                "required": ["doctype", "name"],
                "properties": {
                    "doctype": {"type": "string"},
                    "name": {"type": "string"},
                },
            },
        ),
        Tool(
            name="frappe_submit_document",
            description="Submit a submittable document (changes status to Submitted).",
            inputSchema={
                "type": "object",
                "required": ["doctype", "name"],
                "properties": {
                    "doctype": {"type": "string"},
                    "name": {"type": "string"},
                },
            },
        ),
        Tool(
            name="frappe_cancel_document",
            description="Cancel a submitted document.",
            inputSchema={
                "type": "object",
                "required": ["doctype", "name"],
                "properties": {
                    "doctype": {"type": "string"},
                    "name": {"type": "string"},
                },
            },
        ),
    ]


def handlers() -> dict:
    return {
        "frappe_list_documents": _list_documents,
        "frappe_get_document": _get_document,
        "frappe_create_document": _create_document,
        "frappe_update_document": _update_document,
        "frappe_delete_document": _delete_document,
        "frappe_submit_document": _submit_document,
        "frappe_cancel_document": _cancel_document,
    }


async def _list_documents(args: dict) -> str:
    client = FrappeClient()
    result = await client.get_list(
        args["doctype"],
        fields=args.get("fields", ["name", "modified"]),
        filters=args.get("filters"),
        limit=args.get("limit", 20),
        order_by=args.get("order_by", "modified desc"),
    )
    return json.dumps(result, indent=2)


async def _get_document(args: dict) -> str:
    client = FrappeClient()
    result = await client.get_doc(args["doctype"], args["name"])
    return json.dumps(result, indent=2)


async def _create_document(args: dict) -> str:
    client = FrappeClient()
    data = {"doctype": args["doctype"], **args["data"]}
    result = await client.create_doc(args["doctype"], data)
    return json.dumps(result, indent=2)


async def _update_document(args: dict) -> str:
    client = FrappeClient()
    result = await client.update_doc(args["doctype"], args["name"], args["data"])
    return json.dumps(result, indent=2)


async def _delete_document(args: dict) -> str:
    if get_settings().read_only_mode:
        return "Error: read_only_mode is enabled. Deletion blocked."
    client = FrappeClient()
    result = await client.delete_doc(args["doctype"], args["name"])
    return json.dumps(result, indent=2)


async def _submit_document(args: dict) -> str:
    client = FrappeClient()
    result = await client.update_doc(args["doctype"], args["name"], {"docstatus": 1})
    return json.dumps(result, indent=2)


async def _cancel_document(args: dict) -> str:
    client = FrappeClient()
    result = await client.update_doc(args["doctype"], args["name"], {"docstatus": 2})
    return json.dumps(result, indent=2)