from __future__ import annotations

from backend.ai.classifier import classify_email
from backend.ai.composer import compose_reply
from backend.ai.extractor import extract_email_data


def email_received(trigger: dict) -> dict:
    return trigger


def schedule(trigger: dict) -> dict:
    return trigger


def file_uploaded(trigger: dict) -> dict:
    return trigger


def manual_trigger(trigger: dict) -> dict:
    return trigger


def ai_extract(params: dict, runtime: dict) -> dict:
    email = runtime["trigger"]["email"]
    return extract_email_data(email["from"], email.get("subject", ""), email.get("body", ""))


def ai_classify(params: dict, runtime: dict) -> dict:
    email = runtime["trigger"]["email"]
    return classify_email(email["from"], email.get("subject", ""), email.get("body", ""), runtime["owner"].get("business_description", ""))


def ai_compose(params: dict, runtime: dict) -> dict:
    context = _resolve_value(params.get("context"), runtime)
    return {"reply_body": compose_reply(context if isinstance(context, dict) else {"customer_name": "there"})}


def sheets_read(params: dict, runtime: dict) -> dict:
    sheet_name = params["sheet_name"]
    return {"rows": runtime["db"].read_sheet(runtime["owner_id"], sheet_name)}


def sheets_write(params: dict, runtime: dict) -> dict:
    data = _resolve_value(params["data"], runtime)
    sheet_name = params["sheet_name"]
    runtime["db"].append_sheet_row(runtime["owner_id"], sheet_name, data)
    return {"written": data}


def sheets_update(params: dict, runtime: dict) -> dict:
    runtime["db"].update_sheet_row(
        runtime["owner_id"],
        params["sheet_name"],
        params["lookup_column"],
        _resolve_value(params["lookup_value"], runtime),
        params["update_column"],
        _resolve_value(params["update_value"], runtime),
    )
    return {"updated": True}


def send_email(params: dict, runtime: dict) -> dict:
    message = {
        "to": _resolve_value(params["to"], runtime),
        "subject": params["subject"],
        "body": _resolve_value(params["body"], runtime),
    }
    runtime["db"].record_outbound_email(runtime["owner_id"], message)
    return message


def notify_owner(params: dict, runtime: dict) -> dict:
    payload = {
        "message": params["message"],
        "severity": params.get("severity", "info"),
        "options": params.get("options", []),
    }
    runtime["db"].create_escalation(runtime["owner_id"], runtime["workflow_id"], runtime.get("execution_id", "pending"), payload)
    return payload


def condition(params: dict, runtime: dict) -> dict:
    check = params["check"]
    if "needs_clarification" in check:
        extracted = runtime["step_results"].get("step_extract", {})
        return {"next_step": params["if_false"] if extracted.get("needs_clarification") else params["if_true"]}
    return {"next_step": params["if_true"]}


def loop(params: dict, runtime: dict) -> dict:
    items = _resolve_value(params["items"], runtime)
    return {"items": items}


def wait_for_input(params: dict, runtime: dict) -> dict:
    return notify_owner(
        {
            "message": params["prompt"],
            "severity": "warning",
            "options": params["options"],
        },
        runtime,
    )


def _resolve_value(value, runtime: dict):
    if isinstance(value, dict):
        return {key: _resolve_value(item, runtime) for key, item in value.items()}
    if isinstance(value, list):
        return [_resolve_value(item, runtime) for item in value]
    if isinstance(value, str) and value.startswith("{{") and value.endswith("}}"):
        path = value[2:-2].strip().split(".")
        current = runtime
        for part in path:
            if part in current:
                current = current[part]
            elif part == "trigger":
                current = runtime["trigger"]
            elif part in runtime["step_results"]:
                current = runtime["step_results"][part]
            elif isinstance(current, dict) and part in current:
                current = current[part]
            elif part == "config":
                current = runtime["owner"]
            else:
                return value
        return current
    return value