use axum::extract::{Path, Query, State};
use export::rest::AppResponseData;
use serde::{Deserialize, Serialize};
use session::Session;
use utoipa::IntoParams;

use crate::errors::{ApiError, GitApiError};
use crate::handler::{RepoPath, require_writer};
use crate::service::GitService;
use crate::service::stars::{RepoStarResp, StargazerDto};

#[derive(Debug, Clone, Deserialize, IntoParams)]
pub struct StarsPath {
    pub space_name: String,
    pub repo_name: String,
}

#[derive(Debug, Clone, Deserialize, IntoParams)]
pub struct StarQuery {
    pub limit: Option<u64>,
    pub offset: Option<u64>,
}

#[derive(Debug, Clone, Serialize, utoipa::ToSchema)]
pub struct StarStatusResp {
    pub starred: bool,
}

#[utoipa::path(
    put,
    path = "/repos/{space_name}/{repo_name}/star",
    tag = "repos",
    params(RepoPath),
    responses(
        (status = 200, description = "star repo", body = AppResponseData<RepoStarResp>)
    )
)]
pub async fn star_repo(
    State(service): State<GitService>,
    session: Session,
    Path(path): Path<RepoPath>,
) -> Result<AppResponseData<RepoStarResp>, ApiError> {
    let (ctx, uid) = require_writer(
        &service,
        &session,
        path.space_name.clone(),
        path.repo_name.clone(),
    )
    .await?;
    let out = service
        .star_repo(&ctx, uid)
        .await
        .map_err(GitApiError::from)?;
    Ok(AppResponseData::ok(out))
}

#[utoipa::path(
    delete,
    path = "/repos/{space_name}/{repo_name}/star",
    tag = "repos",
    params(RepoPath),
    responses(
        (status = 200, description = "unstar repo", body = AppResponseData<RepoStarResp>)
    )
)]
pub async fn unstar_repo(
    State(service): State<GitService>,
    session: Session,
    Path(path): Path<RepoPath>,
) -> Result<AppResponseData<RepoStarResp>, ApiError> {
    let (ctx, uid) = require_writer(
        &service,
        &session,
        path.space_name.clone(),
        path.repo_name.clone(),
    )
    .await?;
    let out = service
        .unstar_repo(&ctx, uid)
        .await
        .map_err(GitApiError::from)?;
    Ok(AppResponseData::ok(out))
}

#[utoipa::path(
    get,
    path = "/repos/{space_name}/{repo_name}/star",
    tag = "repos",
    params(RepoPath),
    responses(
        (status = 200, description = "check star status", body = AppResponseData<StarStatusResp>)
    )
)]
pub async fn is_starred(
    State(service): State<GitService>,
    session: Session,
    Path(path): Path<RepoPath>,
) -> Result<AppResponseData<StarStatusResp>, ApiError> {
    let (ctx, uid) = require_writer(
        &service,
        &session,
        path.space_name.clone(),
        path.repo_name.clone(),
    )
    .await?;
    let starred = service
        .is_starred(&ctx, uid)
        .await
        .map_err(GitApiError::from)?;
    Ok(AppResponseData::ok(StarStatusResp { starred }))
}

#[utoipa::path(
    get,
    path = "/repos/{space_name}/{repo_name}/stargazers",
    tag = "repos",
    params(RepoPath, StarQuery),
    responses(
        (status = 200, description = "list stargazers", body = AppResponseData<Vec<StargazerDto>>)
    )
)]
pub async fn list_stargazers(
    State(service): State<GitService>,
    session: Session,
    Path(path): Path<RepoPath>,
    Query(q): Query<StarQuery>,
) -> Result<AppResponseData<Vec<StargazerDto>>, ApiError> {
    let (ctx, _uid) = require_writer(
        &service,
        &session,
        path.space_name.clone(),
        path.repo_name.clone(),
    )
    .await?;
    let limit = q.limit.unwrap_or(50).clamp(1, 100);
    let offset = q.offset.unwrap_or(0);
    let out = service
        .list_stargazers(&ctx, limit, offset)
        .await
        .map_err(GitApiError::from)?;
    Ok(AppResponseData::ok(out))
}

#[allow(dead_code)]
fn _typecheck(_: AppResponseData<RepoStarResp>) {}