package api

import (
	"fmt"
	"log"
	"net/http"
	"strconv"

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

	"github.com/gin-gonic/gin"
)

func declareThemesRoutes(router *gin.RouterGroup) {
	router.GET("/themes", listThemes)
	router.GET("/themes.json", exportThemes)

	themesRoutes := router.Group("/themes/:thid")
	themesRoutes.Use(themeHandler)
	themesRoutes.GET("", showTheme)

	declareExercicesRoutes(themesRoutes)
}

func themeHandler(c *gin.Context) {
	var theme *fic.Theme
	if thid, err := strconv.ParseInt(string(c.Param("thid")), 10, 64); err != nil {
		c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{"errmsg": "Bad theme identifier."})
		return
	} else if theme, err = fic.GetTheme(thid); err != nil {
		c.AbortWithStatusJSON(http.StatusNotFound, gin.H{"errmsg": "Theme not found."})
		return
	}

	c.Set("theme", theme)

	c.Next()
}

func listThemes(c *gin.Context) {
	themes, err := fic.GetThemes()
	if err != nil {
		log.Println("Unable to GetThemes: ", err.Error())
		c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"errmsg": fmt.Sprintf("Unable to list themes: %s", err.Error())})
		return
	}

	c.JSON(http.StatusOK, themes)
}

func exportThemes(c *gin.Context) {
	themes, err := fic.ExportThemes()
	if err != nil {
		log.Println("Unable to ExportThemes: ", err.Error())
		c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"errmsg": fmt.Sprintf("Unable to export themes: %s", err.Error())})
		return
	}

	c.JSON(http.StatusOK, themes)
}

func showTheme(c *gin.Context) {
	c.JSON(http.StatusOK, c.MustGet("theme"))
}