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

use crate::api::response::{ApiErrorResponse, ApiResponse};
use crate::error::AppError;
use crate::models::issues::Issue;
use crate::service::AppService;
use crate::service::issues::core::UpdateIssueParams;
use crate::session::Session;

#[derive(Debug, Deserialize, IntoParams)]
pub struct PathParams {
    /// Workspace name (unique identifier)
    pub workspace_name: String,
    /// Issue number (unique within the workspace)
    pub number: i64,
}

/// Update an issue
///
/// Updates an existing issue's metadata such as title, body, priority, visibility, due date, and milestone.
/// Requires write access to the issue (author or workspace member).
///
/// All fields are optional; only provided fields are updated.
/// Returns the updated issue with full metadata.
#[utoipa::path(
    put,
    path = "/api/v1/workspaces/{workspace_name}/issues/{number}",
    tag = "Issues",
    operation_id = "issueUpdate",
    params(PathParams),
    request_body(
        content = UpdateIssueParams,
        description = "Issue update parameters (all fields optional)",
        content_type = "application/json"
    ),
    responses(
        (status = 200, description = "Issue updated successfully. Returns the updated issue with full metadata.", body = ApiResponse<Issue>),
        (status = 400, description = "Invalid parameters: invalid priority, visibility, or milestone", body = ApiErrorResponse),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 403, description = "Insufficient permissions to edit this issue", body = ApiErrorResponse),
        (status = 404, description = "Workspace, issue, or referenced resource not found", body = ApiErrorResponse),
        (status = 500, description = "Internal server error", body = ApiErrorResponse),
    ),
    security(
        ("session_cookie" = [])
    )
)]
pub async fn update(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    params: web::Json<UpdateIssueParams>,
) -> Result<HttpResponse, AppError> {
    let issue = service
        .issue
        .issue_update(
            &session,
            &path.workspace_name,
            path.number,
            params.into_inner(),
        )
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new(issue)))
}