package main

import (
	"bytes"
	"fmt"
	"html/template"
	"log"
	"net/http"
	"os"
	"strings"

	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/template/html/v2"
	"github.com/yuin/goldmark"
	"lmika.dev/web/isknow/models"
)

func main() {
	questions := models.Game

	prefix, _ := os.LookupEnv("PATH_PREFIX")

	engine := html.New("./views", ".html")
	engine.AddFunc("prefix", func() string { return prefix })
	engine.AddFunc("markdown", func(s string) template.HTML {
		if s == "" {
			return ""
		}

		var buf bytes.Buffer
		if err := goldmark.Convert([]byte(strings.TrimSpace(s)), &buf); err != nil {
			return ""
		}
		return template.HTML(buf.String())
	})

	app := fiber.New(fiber.Config{
		Views:             engine,
		ViewsLayout:       "layout",
		PassLocalsToViews: true,
	})

	app.Get("/", func(c *fiber.Ctx) error {
		c.Locals("fadeIn", true)
		return c.Render("index", fiber.Map{})
	})
	app.Get("/results", func(c *fiber.Ctx) error {
		c.Locals("fadeIn", true)
		return c.Render("results", fiber.Map{})
	})
	app.Get("/end", func(c *fiber.Ctx) error {
		c.Locals("fadeIn", true)
		return c.Render("end", fiber.Map{})
	})
	app.Get("/:qid", func(c *fiber.Ctx) error {
		qID, err := c.ParamsInt("qid")
		if err != nil {
			return c.SendStatus(http.StatusBadRequest)
		}

		idx := qID - 1
		if idx < 0 || idx >= len(questions.Questions) {
			return c.SendStatus(http.StatusBadRequest)
		}

		rq, err := questions.Questions[idx].Render()
		if err != nil {
			return err
		}

		nextURL := prefix + "/results"
		reachedEnd := true
		if idx+1 < len(questions.Questions) {
			nextURL = fmt.Sprintf("%v/%d", prefix, idx+2)
			reachedEnd = true
		}

		c.Locals("fadeIn", idx == 0)
		return c.Render("question", fiber.Map{
			"q":          rq,
			"qIdx":       qID,
			"nextURL":    nextURL,
			"reachedEnd": reachedEnd,
		})
	})
	app.Static("/assets", "./public")

	log.Fatal(app.Listen(":3000"))
}