package codequest

import (
	"github.com/gunk/opt/http"
	"github.com/gunk/opt/openapiv2"
	"github.com/gunk/opt/proto"
	"time"
)

type QuestService interface {
	// Questions returns the list of available questions.
	// Each question is also listed with whether it has been answered, and
	// the points awarded for answering it correctly.
	//
	// The Text field will not be populated. To get the text, use QuestionByID.
	//
	// +gunk http.Match{
	//         Method: "GET",
	//         Path:   "/v1/questions",
	// }
	Questions(QuestionsRequest) QuestionsResponse

	// QuestionByID returns the question with the given ID.
	//
	// +gunk http.Match{
	//         Method: "GET",
	//         Path:   "/v1/questions/{ID}",
	// }
	QuestionByID(QuestionByIDRequest) Question

	// QuestionInput returns the question input for the given question.
	// The input is the same for part 1 and part 2.
	//
	// +gunk http.Match{
	//         Method: "GET",
	//         Path:   "/v1/questions/{ID}/input",
	// }
	QuestionInput(QuestionInputRequest) QuestionInput

	// Submit submits the answer to the given question and part.
	//
	// +gunk http.Match{
	//         Method: "POST",
	//         Path:   "/v1/questions/{ID}/{Part}",
	//         Body:   "Body",
	// }
	Submit(SubmitRequest) SubmitResponse

	// Leaderboard returns the global ranking of all participatants.
	// The leaderboard is sorted by score, descending.
	//
	// +gunk http.Match{
	//         Method: "GET",
	//         Path:   "/v1/questions/leaderboard",
	// }
	Leaderboard(LeaderboardRequest) LeaderboardResponse
}

type QuestionsRequest struct{}

type Difficulty int

const (
	Level1 Difficulty = iota
	Level2
)

type PartData struct {
	Completed   bool `pb:"1" json:"completed"`
	PointsWorth int  `pb:"2" json:"pointsWorth"`
}

type Question struct {
	ID         string     `pb:"1" json:"id"`
	Title      string     `pb:"2" json:"title"`
	Text       string     `pb:"3" json:"text"`
	Difficulty Difficulty `pb:"4" json:"difficulty"`
	Part1      PartData   `pb:"5" json:"part1"`
	Part2      PartData   `pb:"6" json:"part2"`
}

type QuestionsResponse struct {
	Questions []Question `pb:"1" json:"questions"`
}

type QuestionByIDRequest struct {
	ID string `pb:"1" json:"id"`
}

type QuestionInputRequest struct {
	ID string `pb:"1" json:"id"`
}

type QuestionInput struct {
	ID    string `pb:"1" json:"id"`
	Input string `pb:"2" json:"input"`
}

type SubmitRequestData struct {
	Answer string `pb:"2" json:"answer"`
	Code   string `pb:"4" json:"code"`
}

type SubmitRequest struct {
	ID   string            `pb:"1" json:"id"`
	Part int               `pb:"3" json:"part"`
	Body SubmitRequestData `pb:"2" json:"Body"`
}

type SubmitResponse struct {
	Correct bool `pb:"3" json:"correct"`
	Points  int  `pb:"5" json:"points"`
}

type LeaderboardRequest struct{}

type LeaderboardResponse struct {
	Leaderboard []LeaderboardEntry `pb:"1" json:"leaderboard"`
}

type LeaderboardEntry struct {
	Username string `pb:"1" json:"username"`
	Points   int    `pb:"2" json:"points"`
}