use actix_multipart::Multipart;
use actix_web::{HttpResponse, web};
use serde::Deserialize;
use utoipa::IntoParams;

use crate::api::response::{ApiErrorResponse, ApiResponse};
use crate::api::user::upload_avatar::parse_avatar_field;
use crate::error::AppError;
use crate::service::AppService;
use crate::session::Session;

#[derive(Debug, Deserialize, IntoParams)]
pub struct PathParams {
    pub workspace_name: String,
    pub repo_name: String,
    pub release_id: uuid::Uuid,
}

#[derive(Debug, Deserialize, IntoParams)]
pub struct AssetPathParams {
    pub workspace_name: String,
    pub repo_name: String,
    pub release_id: uuid::Uuid,
    pub asset_id: uuid::Uuid,
}

#[derive(Debug, Deserialize, IntoParams)]
pub struct ListQueryParams {
    pub limit: Option<i64>,
    pub offset: Option<i64>,
}

#[utoipa::path(
    post,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/releases/{release_id}/assets",
    tag = "Repos",
    operation_id = "repoUploadReleaseAsset",
    params(PathParams),
    request_body(content_type = "multipart/form-data"),
    responses(
        (status = 201, description = "Asset uploaded", body = ApiResponse<crate::service::repo::release_assets::ReleaseAssetData>),
        (status = 401, description = "Unauthorized", body = ApiErrorResponse),
        (status = 404, description = "Release not found", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn upload_asset(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    payload: Multipart,
) -> Result<HttpResponse, AppError> {
    let (data, content_type, file_name) = parse_avatar_field(payload).await?;
    let filename = file_name.unwrap_or_else(|| "asset.bin".to_string());
    let result = service
        .repo
        .repo_upload_release_asset(
            &session,
            &path.workspace_name,
            &path.repo_name,
            path.release_id,
            &filename,
            data,
            content_type
                .as_deref()
                .unwrap_or("application/octet-stream"),
        )
        .await?;
    Ok(HttpResponse::Created().json(ApiResponse::new(result)))
}

#[utoipa::path(
    get,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/releases/{release_id}/assets",
    tag = "Repos",
    operation_id = "repoListReleaseAssets",
    params(PathParams, ListQueryParams),
    responses(
        (status = 200, description = "List of release assets", body = ApiResponse<Vec<crate::service::repo::release_assets::ReleaseAssetData>>),
        (status = 401, description = "Unauthorized", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn list_assets(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    query: web::Query<ListQueryParams>,
) -> Result<HttpResponse, AppError> {
    let result = service
        .repo
        .repo_list_release_assets(
            &session,
            &path.workspace_name,
            &path.repo_name,
            path.release_id,
            query.limit.unwrap_or(50),
            query.offset.unwrap_or(0),
        )
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new(result)))
}

#[utoipa::path(
    delete,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/releases/{release_id}/assets/{asset_id}",
    tag = "Repos",
    operation_id = "repoDeleteReleaseAsset",
    params(AssetPathParams),
    responses(
        (status = 200, description = "Asset deleted", body = ApiResponse<String>),
        (status = 401, description = "Unauthorized", body = ApiErrorResponse),
        (status = 404, description = "Not found", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn delete_asset(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<AssetPathParams>,
) -> Result<HttpResponse, AppError> {
    service
        .repo
        .repo_delete_release_asset(
            &session,
            &path.workspace_name,
            &path.repo_name,
            path.release_id,
            path.asset_id,
        )
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new("asset deleted".to_string())))
}

#[utoipa::path(
    get,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/releases/{release_id}/assets/{asset_id}/download",
    tag = "Repos",
    operation_id = "repoDownloadReleaseAsset",
    params(AssetPathParams),
    responses(
        (status = 302, description = "Redirect to download URL"),
        (status = 404, description = "Not found", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn download_asset(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<AssetPathParams>,
) -> Result<HttpResponse, AppError> {
    let url = service
        .repo
        .repo_get_release_asset_download_url(
            &session,
            &path.workspace_name,
            &path.repo_name,
            path.release_id,
            path.asset_id,
        )
        .await?;
    Ok(HttpResponse::Found()
        .insert_header(("Location", url))
        .finish())
}