package api

import (
	"dancefloor/patterns"
	"github.com/gin-gonic/gin"
	"net/http"
	"reflect"
)

var all = map[string]func() patterns.Pattern{
	"SolidColour":   func() patterns.Pattern { return &patterns.SolidColour{} },
	"SuperRgb":      func() patterns.Pattern { return &patterns.SuperRgb{} },
	"Character":     func() patterns.Pattern { return &patterns.Character{} },
	"ScrollingText": func() patterns.Pattern { return &patterns.ScrollingText{} },
}

func indexPatterns(ctx *gin.Context) {
	var out []map[string]string

	for _, generator := range all {
		fieldsMap := make(map[string]string)

		pattern := generator()
		patternType := reflect.TypeOf(pattern)
		if patternType.Kind() == reflect.Ptr {
			patternType = reflect.Indirect(reflect.ValueOf(pattern)).Type()
		}

		for i := 0; i < patternType.NumField(); i++ {
			field := patternType.Field(i)
			if field.PkgPath == "" { // if field is exported, this is empty
				fieldsMap[field.Name] = field.Type.Name()
			}
		}
		out = append(out, fieldsMap)
	}

	ctx.JSON(200, out)
}

func putPattern(ctx *gin.Context) {
	query := ctx.Param("name")
	generator, ok := all[query]
	if !ok {
		ctx.AbortWithStatus(http.StatusNotFound)
		return
	}

	pattern := generator()
	err := ctx.BindJSON(pattern)
	if err != nil {
		ctx.AbortWithStatus(http.StatusBadRequest)
		return
	}

	setter(pattern)
	ctx.Status(http.StatusNoContent)
}