"""Print Format tools — create, list, update Frappe Print Formats (Jinja/HTML)."""

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


def tools() -> list[Tool]:
    return [
        Tool(
            name="frappe_list_print_formats",
            description="List all Print Formats, optionally filtered by DocType.",
            inputSchema={
                "type": "object",
                "properties": {
                    "doc_type": {"type": "string", "description": "Filter by DocType"},
                    "limit": {"type": "integer", "default": 30},
                },
            },
        ),
        Tool(
            name="frappe_get_print_format",
            description="Get the full definition of a Print Format including its HTML template.",
            inputSchema={
                "type": "object",
                "required": ["name"],
                "properties": {
                    "name": {"type": "string"},
                },
            },
        ),
        Tool(
            name="frappe_create_print_format",
            description=(
                "Create a new custom Print Format with a Jinja2/HTML template. "
                "Use {{ doc.field_name }} syntax to access document fields."
            ),
            inputSchema={
                "type": "object",
                "required": ["name", "doc_type", "html"],
                "properties": {
                    "name": {"type": "string"},
                    "doc_type": {"type": "string", "description": "DocType this format applies to"},
                    "html": {"type": "string", "description": "Jinja2 HTML template"},
                    "css": {"type": "string", "description": "Optional custom CSS"},
                    "standard": {"type": "string", "default": "No", "enum": ["Yes", "No"]},
                    "disabled": {"type": "integer", "default": 0},
                    "default_print_language": {"type": "string", "default": "en"},
                    "print_format_type": {
                        "type": "string",
                        "enum": ["Jinja", "JS"],
                        "default": "Jinja",
                    },
                },
            },
        ),
        Tool(
            name="frappe_update_print_format",
            description="Update an existing Print Format's HTML, CSS, or properties.",
            inputSchema={
                "type": "object",
                "required": ["name"],
                "properties": {
                    "name": {"type": "string"},
                    "html": {"type": "string"},
                    "css": {"type": "string"},
                    "disabled": {"type": "integer"},
                    "updates": {"type": "object", "description": "Any additional fields to update"},
                },
            },
        ),
        Tool(
            name="frappe_preview_print_format",
            description="Get a rendered HTML preview of a Print Format for a specific document.",
            inputSchema={
                "type": "object",
                "required": ["doctype", "docname", "print_format"],
                "properties": {
                    "doctype": {"type": "string"},
                    "docname": {"type": "string"},
                    "print_format": {"type": "string"},
                    "letterhead": {"type": "string", "description": "Letterhead name (optional)"},
                },
            },
        ),
    ]


def handlers() -> dict:
    return {
        "frappe_list_print_formats": _list_print_formats,
        "frappe_get_print_format": _get_print_format,
        "frappe_create_print_format": _create_print_format,
        "frappe_update_print_format": _update_print_format,
        "frappe_preview_print_format": _preview_print_format,
    }


async def _list_print_formats(args: dict) -> str:
    client = FrappeClient()
    filters = []
    if doc_type := args.get("doc_type"):
        filters.append(["doc_type", "=", doc_type])
    result = await client.get_list(
        "Print Format",
        fields=["name", "doc_type", "disabled", "standard", "modified"],
        filters=filters if filters else None,
        limit=args.get("limit", 30),
    )
    return json.dumps(result, indent=2)


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


async def _create_print_format(args: dict) -> str:
    client = FrappeClient()
    payload = {
        "name": args["name"],
        "doc_type": args["doc_type"],
        "html": args["html"],
        "css": args.get("css", ""),
        "standard": args.get("standard", "No"),
        "disabled": args.get("disabled", 0),
        "default_print_language": args.get("default_print_language", "en"),
        "print_format_type": args.get("print_format_type", "Jinja"),
    }
    result = await client.create_doc("Print Format", payload)
    return json.dumps(result, indent=2)


async def _update_print_format(args: dict) -> str:
    client = FrappeClient()
    updates = args.get("updates", {})
    for field in ("html", "css", "disabled"):
        if field in args:
            updates[field] = args[field]
    result = await client.update_doc("Print Format", args["name"], updates)
    return json.dumps(result, indent=2)


async def _preview_print_format(args: dict) -> str:
    client = FrappeClient()
    params = {
        "doctype": args["doctype"],
        "name": args["docname"],
        "print_format": args["print_format"],
    }
    if letterhead := args.get("letterhead"):
        params["letterhead"] = letterhead
    result = await client.get("/api/method/frappe.www.printview.get_html_and_style", params=params)
    return json.dumps(result, indent=2)