package loader

import (
	"bytes"
	_ "embed"
	"encoding/json"
	"io"
	"log"
)

//go:embed conf/default.json
var defaultConf []byte

// DefaultConf loads the defaultConf of the package. The base
// is the default.json inside the package definition.
func DefaultConf() *Conf {
	buf := bytes.NewBuffer(defaultConf)
	conf := &Conf{}
	err := conf.DecodeJSON(buf)
	if err != nil {
		log.Println("cannot decode default conf: ", err)
	}
	return conf
}

// Conf configures the mapping from the excel version
// to the eCalc structure
type Conf struct {
	Title   string  `json:"title"`
	Version string  `json:"version"`
	Type    string  `json:"type"`
	Values  []Value `json:"values"`
	Areas   []Area  `json:"areas"`
	Rating  Rating  `json:"rating"`
	Matrix  Matrix  `json:"matrix"`
}

// EncodeJSON writes the JSON of the conf into the Writer
func (c Conf) EncodeJSON(w io.Writer) error {
	enc := json.NewEncoder(w)
	enc.SetIndent("", "  ")
	return enc.Encode(c)
}

// DecodeJSON writes the configuration from the reader into
// the pointer of the conf
func (c *Conf) DecodeJSON(r io.Reader) error {
	dec := json.NewDecoder(r)
	return dec.Decode(c)
}

// Value defines a single value inside the excel workbook
type Value struct {
	Sheet   int    `json:"sheet"`
	Cell    string `json:"cell"`
	Type    string `json:"type"`
	Struct  string `json:"struct"`
	Field   string `json:"field"`
	Default string `json:"default"`
}

// Area defines rows and cols, which are maped to
// a slice of a type. For example IndustrySector
type Area struct {
	Sheet    int       `json:"sheet"`
	StartRow int       `json:"start_row"`
	EndRow   int       `json:"end_row"`
	Struct   string    `json:"struct"`
	Cols     []AreaCol `json:"cols"`
}

// AreaCol defines each col of an area. As Col-Definition
// the letter from the Excel should be used.
// For example "A" for the first col, "B" for the second ...
type AreaCol struct {
	Col     string `json:"col"`
	Field   string `json:"field"`
	Type    string `json:"type"`
	Split   string `json:"split"`
	Default string `json:"default"`
}

// Rating defines the area of the ratingarea
// The cols must be defined by the letter of the col
// for example "A" for the first col
type Rating struct {
	Sheet             int         `json:"sheet"`
	StartRow          int         `json:"start_row"`
	EndRow            int         `json:"end_row"`
	Cols              []RatingCol `json:"cols"`
	PointsCol         string      `json:"points_col"`
	MaxPointsCol      string      `json:"max_points_col"`
	IDCol             string      `json:"id_col"`
	ShortNameCol      string      `json:"short_name_col"`
	NameCol           string      `json:"name_col"`
	EstimationsCol    string      `json:"estimations_col"`
	WeightCol         string      `json:"weight_col"`
	SelectedByUserCol string      `json:"selected_by_user_col"`
}

type RatingCol struct {
	Col     string `json:"col"`
	Field   string `json:"field"`
	Type    string `json:"type"`
	Default string `json:"default"`
}

type Matrix struct {
	Sheet        int           `json:"sheet"`
	Stakeholders []Stakeholder `json:"stakeholders"`
	Values       []MatrixValue `json:"values"`
}

type Stakeholder struct {
	Row       int    `json:"row"`
	ShortName string `json:"short_name"`
	Name      string `json:"name"`
}

type MatrixValue struct {
	ShortName            string `json:"short_name"`
	PointsCol            string `json:"points_col"`
	PercentageReachedCol string `json:"percentage_reached_col"`
	MaxPointsCol         string `json:"max_points_col"`
}