package sync

import (
	"path"

	"github.com/BurntSushi/toml"
)

// ExerciceHintParams holds EHint definition infomation.
type ExerciceHintParams struct {
	Filename string
	Content  string
	Cost     int64
	Title    string
}

// ExerciceDependency holds dependency definitions information.
type ExerciceDependency struct {
	Id    int64
	Theme string `toml:",omitempty"`
}

// ExerciceUnlockFile holds parameters related to a locked file.
type ExerciceUnlockFile struct {
	Filename string `toml:",omitempty"`
}

// ExerciceFlagChoice holds informations about a choice (for MCQ and UCQ).
type ExerciceFlagChoice struct {
	Label         string        `toml:",omitempty"`
	Value         interface{}   `toml:",omitempty"`
	Justification *ExerciceFlag `toml:",omitempty""`
}

// ExerciceFlag holds informations about one flag.
type ExerciceFlag struct {
	Id          int64
	Label       string               `toml:",omitempty"`
	Type        string               `toml:",omitempty"`
	Raw         interface{}
	Separator   string               `toml:",omitempty"`
	Ordered     bool                 `toml:",omitempty"`
	IgnoreCase  bool                 `toml:",omitempty"`
	ValidatorRe string               `toml:"validator_regexp,omitempty"`
	Help        string               `toml:",omitempty"`
	ChoicesCost int64                `toml:"choices_cost,omitempty"`
	Choice      []ExerciceFlagChoice
	LockedFile  []ExerciceUnlockFile `toml:"unlock_file,omitempty"`
	NeedFlag    []ExerciceDependency `toml:"need_flag,omitempty"`
	NoShuffle   bool
}

// ExerciceParams contains values parsed from defines.txt.
type ExerciceParams struct {
	Gain         int64
	Tags         []string
	Hints        []ExerciceHintParams `toml:"hint"`
	Dependencies []ExerciceDependency `toml:"depend"`
	Flags        []ExerciceFlag       `toml:"flag"`
	FlagsMCQ     []ExerciceFlag       `toml:"flag_mcq"`
	FlagsUCQ     []ExerciceFlag       `toml:"flag_ucq"`
}

// parseExerciceParams reads challenge definitions from defines.txt and extract usefull data to set up the challenge.
func parseExerciceParams(i Importer, exPath string) (p ExerciceParams, err error) {
	var defs string
	defs, err = getFileContent(i, path.Join(exPath, "challenge.txt"))

	_, err = toml.Decode(defs, &p)

	return
}