package api

import (
	"encoding/json"
	"errors"
	"strconv"

	"srs.epita.fr/fic-server/libfic"

	"github.com/julienschmidt/httprouter"
)

func init() {
	router.POST("/api/qa/", apiHandler(importExerciceQA))
	router.POST("/api/qa/:qid/comments", apiHandler(qaHandler(importQAComment)))
}

func qaHandler(f func(fic.QAQuery, []byte) (interface{}, error)) func(httprouter.Params, []byte) (interface{}, error) {
	return func(ps httprouter.Params, body []byte) (interface{}, error) {
		if qid, err := strconv.ParseInt(string(ps.ByName("qid")), 10, 64); err != nil {
			return nil, err
		} else if query, err := fic.GetQAQuery(qid); err != nil {
			return nil, err
		} else {
			return f(query, body)
		}
	}
}

func importExerciceQA(_ httprouter.Params, body []byte) (interface{}, error) {
	// Create a new query
	var uq fic.QAQuery
	if err := json.Unmarshal(body, &uq); err != nil {
		return nil, err
	}

	var exercice fic.Exercice
	var err error
	if uq.IdExercice == 0 {
		return nil, errors.New("id_exercice not filled")
	} else if exercice, err = fic.GetExercice(uq.IdExercice); err != nil {
		return nil, err
	}

	if len(uq.State) == 0 {
		return nil, errors.New("State not filled")
	}

	if len(uq.Subject) == 0 {
		return nil, errors.New("Subject not filled")
	}

	if qa, err := exercice.NewQAQuery(uq.Subject, uq.IdTeam, uq.User, uq.State); err != nil {
		return nil, err
	} else {
		qa.Creation = uq.Creation
		qa.Solved = uq.Solved
		qa.Closed = qa.Closed

		_, err = qa.Update()
		return qa, err
	}
}

func importQAComment(query fic.QAQuery, body []byte) (interface{}, error) {
	// Create a new query
	var uc fic.QAComment
	if err := json.Unmarshal(body, &uc); err != nil {
		return nil, err
	}

	if len(uc.Content) == 0 {
		return nil, errors.New("Empty comment")
	}

	if qac, err := query.AddComment(uc.Content, uc.IdTeam, uc.User); err != nil {
		return nil, err
	} else {
		qac.Date = uc.Date

		_, err = qac.Update()
		return qac, err
	}
}