"""API batch prediction call wrappers."""

from io import StringIO
from pathlib import Path

import requests
import typer
from Bio import SeqIO
from folding_studio_data_models import (
    AF2Request,
    BatchRequest,
    FoldingModel,
    OpenFoldRequest,
    Sequence,
)
from rich import print  # pylint:disable=redefined-builtin

from folding_studio.config import API_URL, REQUEST_TIMEOUT
from folding_studio.utils.data_model import (
    PredictRequestCustomFiles,
    PredictRequestParams,
)
from folding_studio.utils.headers import get_auth_headers
from folding_studio.utils.project_validation import define_project_code_or_raise


def _extract_sequences_from_file(file: Path) -> list[Sequence]:
    content = SeqIO.parse(StringIO(file.read_text()), "fasta")
    sequences = []
    for records in content:
        description = str(records.description)
        sequences.append(
            Sequence(description=description, fasta_sequence=str(records.seq))
        )
    return sequences


def _build_request_from_fasta(
    file: Path,
    folding_model: FoldingModel,
    params: PredictRequestParams,
    custom_files: PredictRequestCustomFiles,
) -> AF2Request | OpenFoldRequest:
    """Build an AF2Request from a fasta file path and request parameters.

    Args:
        file (Path): Path to a file describing the protein.
        folding_model (FoldingModel): Folding model to run the inference with.
        params (PredictRequestParams): API request parameters.
        custom_files (PredictRequestCustomFiles): API request custom files.

    Returns:
        AF2Request | OpenFoldRequest: Request object.
    """
    parameters = dict(
        num_recycle=params.num_recycle,
        random_seed=params.random_seed,
        custom_templates=params.custom_template_ids
        + [str(f) for f in custom_files.templates],
        custom_msas=[str(f) for f in custom_files.msas],
        gap_trick=params.gap_trick,
        msa_mode=params.msa_mode,
        max_msa_clusters=params.max_msa_clusters,
        max_extra_msa=params.max_extra_msa,
        template_mode=params.template_mode,
        model_subset=params.model_subset,
        initial_guess_file=custom_files.initial_guess_files,
        templates_masks_file=custom_files.templates_masks_files,
    )
    if folding_model == FoldingModel.AF2:
        return AF2Request(
            complex_id=file.stem,
            sequences=_extract_sequences_from_file(file),
            parameters=parameters,
            ignore_cache=params.ignore_cache,
        )
    return OpenFoldRequest(
        complex_id=file.stem,
        sequences=_extract_sequences_from_file(file),
        parameters=parameters,
        ignore_cache=params.ignore_cache,
    )


def batch_prediction(
    files: list[Path],
    folding_model: FoldingModel,
    params: PredictRequestParams,
    custom_files: PredictRequestCustomFiles,
    project_code: str | None = None,
    num_seed: int | None = None,
) -> dict:
    """Make a batch prediction from a list of files.

    Args:
        files (list[Path]): List of data source file paths.
        params (PredictRequestParams): API request parameters.
        custom_files (PredictRequestCustomFiles): API request custom files.
        project_code (str|None): Project code under which the jobs are billed.
        num_seed (int | None, optional): Number of random seeds. Defaults to None.

    Raises:
        typer.Exit: If an error occurs during the API call.
    """
    project_code = define_project_code_or_raise(project_code=project_code)
    # upload custom files if any
    custom_files.upload()

    if num_seed is not None:
        folding_requests = []
        for seed in range(num_seed):
            params.random_seed = seed
            folding_requests += [
                _build_request_from_fasta(
                    file=file,
                    folding_model=folding_model,
                    params=params,
                    custom_files=custom_files,
                )
                for file in files
            ]
    else:
        folding_requests = [
            _build_request_from_fasta(
                file=file,
                folding_model=folding_model,
                params=params,
                custom_files=custom_files,
            )
            for file in files
        ]
    batch_request = BatchRequest(requests=folding_requests)
    url = API_URL + "batchPredict"

    response = requests.post(
        url,
        data={"batch_jobs_request": batch_request.model_dump_json()},
        params={"project_code": project_code},
        headers=get_auth_headers(),
        timeout=REQUEST_TIMEOUT,
    )

    if not response.ok:
        print(f"An error occurred: {response.content.decode()}")
        raise typer.Exit(code=1)

    response_json = response.json()
    return response_json


def batch_prediction_from_file(
    file: Path,
    project_code: str | None = None,
) -> dict:
    """Make a batch prediction from a configuration files.

    Args:
        file (Path): Configuration file path.
        project_code (str|None): Project code under which the jobs are billed.

    Raises:
        typer.Exit: If an error occurs during the API call.
    """
    project_code = define_project_code_or_raise(project_code=project_code)
    url = API_URL + "batchPredictFromFile"

    custom_files = PredictRequestCustomFiles.from_batch_jobs_file(batch_jobs_file=file)
    local_to_uploaded = custom_files.upload()

    if local_to_uploaded:
        content = file.read_text()
        for local, uploaded in local_to_uploaded.items():
            content = content.replace(local, uploaded)
        tmp_file = Path("tmp_batch_job" + file.suffix)
        tmp_file.write_text(content)
        file_to_upload = tmp_file
    else:
        tmp_file = None
        file_to_upload = file

    with file_to_upload.open("rb") as input_file:
        response = requests.post(
            url,
            headers=get_auth_headers(),
            files=[("batch_jobs_file", input_file)],
            params={"project_code": project_code},
            timeout=REQUEST_TIMEOUT,
        )

    if tmp_file and tmp_file.exists():
        tmp_file.unlink()

    if not response.ok:
        print(f"An error occurred: {response.content.decode()}")
        raise typer.Exit(code=1)

    return response.json()