import Dependencies
import Fluent
import Vapor

struct VendorApiController: RouteCollection {

  @Dependency(\.vendors) var vendors

  func boot(routes: any RoutesBuilder) throws {
    let protected = routes.apiProtected(route: "vendors")
    protected.get(use: index(req:))
    protected.post(use: create(req:))
    protected.group(":id") {
      $0.put(use: update(req:))
      $0.delete(use: delete(req:))
    }
  }

  @Sendable
  func index(req: Request) async throws -> [Vendor.DTO] {
    let params = try req.query.decode(VendorsIndexQuery.self)
    return try await vendors.fetchAll(params.fetchRequest)
  }

  @Sendable
  func create(req: Request) async throws -> Vendor.DTO {
    try await vendors.create(req.ensureValidContent(Vendor.Create.self))
  }

  @Sendable
  func update(req: Request) async throws -> Vendor.DTO {
    guard let id = req.parameters.get("id", as: Vendor.IDValue.self) else {
      throw Abort(.badRequest, reason: "Vendor id not provided.")
    }
    try Vendor.Update.validate(content: req)
    let updates = try req.content.decode(Vendor.Update.self)
    return try await vendors.update(id, updates)
  }

  @Sendable
  func delete(req: Request) async throws -> HTTPStatus {
    guard let id = req.parameters.get("id", as: Vendor.IDValue.self) else {
      throw Abort(.badRequest, reason: "Vendor id not provided.")
    }
    try await vendors.delete(id)
    return .ok
  }
}

struct VendorsIndexQuery: Content {
  let branches: Bool?

  var fetchRequest: VendorDB.FetchRequest {
    if branches == true { return .withBranches }
    return .default
  }
}