use axum::Json;
use axum::extract::{Path, State};
use export::rest::AppResponseData;
use session::Session;

use crate::errors::{ApiError, GitApiError};
use crate::handler::resolve_reader;
use crate::service::GitService;
use crate::service::conflicts::MergeStatusDto;

#[derive(Debug, Clone, serde::Deserialize, utoipa::ToSchema)]
pub struct ConflictCheckThreewayBody {
    pub ours: String,
    pub theirs: String,
    pub ancestor: String,
}

#[utoipa::path(
    post,
    path = "/repos/{space_name}/{repo_name}/conflicts/check-threeway",
    tag = "conflicts",
    params(crate::handler::RepoPath),
    request_body = ConflictCheckThreewayBody,
    responses(
        (status = 200, description = "three-way merge conflict check", body = AppResponseData<MergeStatusDto>)
    )
)]
pub async fn conflict_check_threeway(
    State(service): State<GitService>,
    session: Session,
    Path(path): Path<crate::handler::RepoPath>,
    Json(body): Json<ConflictCheckThreewayBody>,
) -> Result<AppResponseData<MergeStatusDto>, ApiError> {
    let _ = resolve_reader(&service, &session, path.space_name.clone(), path.repo_name.clone()).await?;
    let out = service
        .conflict_check_threeway(
            path.space_name,
            path.repo_name,
            body.ours,
            body.theirs,
            body.ancestor,
        )
        .await
        .map_err(GitApiError::from)?;
    Ok(AppResponseData::ok(out))
}