package handlers

import (
	"log"
	"slices"

	"git.odit.services/lfk/document-server/models"
	"git.odit.services/lfk/document-server/services"
	"git.odit.services/lfk/document-server/templates"
	"github.com/gofiber/fiber/v2"
)

// GenerateCertificate godoc
// @Summary Generate runner certificates
// @Description Generate certificates based on the provided data
// @Tags certificates
// @Accept json
// @Param data body models.CertificateRequest true "Certificate data"
// @Produce application/pdf
// @Router /certificates [post]
func GenerateCertificate(c *fiber.Ctx) error {
	certificateRequest := new(models.CertificateRequest)
	if err := c.BodyParser(certificateRequest); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"error": err.Error(),
		})
	}
	if !slices.Contains([]string{"en", "de"}, certificateRequest.Locale) {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"error": "Invalid locale",
		})
	}

	generator := services.DefaultTemplater{}
	templateString, err := templates.GetTemplate(certificateRequest.Locale, "certificate")
	if err != nil {
		log.Println(err)
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"error": "Template not found",
		})
	}
	template, err := generator.StringToTemplate(templateString)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": err.Error(),
		})
	}

	genConfig := &models.CertificateTemplateOptions{
		Runners:        addUpRunnerDonations(certificateRequest.Runners),
		EventName:      "Event name",
		Footer:         "Footer",
		CurrencySymbol: "€",
		Locale:         certificateRequest.Locale,
	}

	result, err := generator.Execute(template, genConfig)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": err.Error(),
		})
	}
	c.Set(fiber.HeaderContentType, "text/html")
	converter := services.GotenbergConverter{BaseUrl: "http://localhost:3001"}
	pdf, err := converter.ToPdf(result, "a4", false)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": err.Error(),
		})
	}

	c.Set(fiber.HeaderContentType, "application/pdf")
	return c.Send(pdf)
}

func addUpRunnerDonations(runners []models.RunnerWithDonations) []models.RunnerWithDonations {
	for i := 0; i < len(runners); i++ {
		for j := 0; j < len(runners[i].DistanceDonations); j++ {
			runners[i].TotalDonations += runners[i].DistanceDonations[j].Amount
			runners[i].TotalPerDistance += runners[i].DistanceDonations[j].AmountPerDistance
		}
	}
	return runners
}