import Vapor

/// The decoder to extract caps from JSON payloads given to the `cap` route.
private let decoder = JSONDecoder()

private func authorize(_ request: Request) throws {
    let key = try request.query.get(String.self, at: "key")
    guard server.hasAuthorization(for: key) else {
        throw Abort(.forbidden)
    }
}

func routes(_ app: Application) throws {

    // Add or change a cap
    app.postCatching("cap") { request in
        try authorize(request)
        guard let buffer = request.body.data else {
            log("Invalid body data")
            throw CapError.invalidBody
        }
        let cap = try decoder.decode(Cap.self, from: buffer)
        try server.addOrUpdate(cap)
    }
    
    // Upload an image
    app.postCatching("images", ":n") { request in
        try authorize(request)
        guard let cap = request.parameters.get("n", as: Int.self) else {
            log("Invalid parameter for cap")
            throw Abort(.badRequest)
        }
        guard let buffer = request.body.data else {
            log("Invalid body data")
            throw CapError.invalidBody
        }
        let data = Data(buffer: buffer)
        try server.save(image: data, for: cap)
    }
}