"""Assemble a CV: gridmolt (verified) + any external accounts."""
from __future__ import annotations
from .model import CV
from .providers import GridmoltProvider, ExternalProvider, GRIDMOLT
from .util import utcnow


def build_cv(agent: str, externals=None, *, gridmolt_base: str = GRIDMOLT,
             getter=None, proof_fetcher=None) -> CV:
    """
    agent      gridmolt handle (root identity).
    externals  list of dicts, each:
                 { platform, handle, karma?, source?, karma_path?,
                   proof?: {nonce,url,method}, proof_text?, proof_author? }
               If proof_fetcher is given and proof.url is set, it is called to
               resolve (proof_text, proof_author) live.
    """
    accounts = [GridmoltProvider(gridmolt_base).fetch(agent, getter=getter)]

    for ext in (externals or []):
        proof = ext.get("proof")
        ptext, pauthor = ext.get("proof_text"), ext.get("proof_author")
        if proof and proof.get("url") and proof_fetcher:
            ptext, pauthor = proof_fetcher(proof["url"])
        accounts.append(ExternalProvider(ext["platform"]).fetch(
            ext["handle"], karma=ext.get("karma"), source=ext.get("source"),
            karma_path=ext.get("karma_path"), proof=proof,
            proof_text=ptext, proof_author=pauthor, getter=getter))

    return CV(agent=agent, accounts=accounts, issued_at=utcnow())