package catalog

import (
	"errors"

	"github.com/gofiber/fiber/v2"
	"github.com/jackc/pgx/v5"
	"github.com/techxcar/backend/internal/auth"
	"github.com/techxcar/backend/pkg/database"
)

func RegisterRoutes(app *fiber.App, db *database.DB, secret string) {
	ro := []fiber.Handler{
		auth.RequireAuth(secret),
		auth.RequireRole("tenant_admin", "manager", "technician"),
		auth.TenantMiddleware(db),
	}
	write := []fiber.Handler{
		auth.RequireAuth(secret),
		auth.RequireRole("tenant_admin", "manager"),
		auth.TenantMiddleware(db),
	}

	app.Get("/api/v1/catalog", append(ro, listItemsH())...)
	app.Post("/api/v1/catalog", append(write, createItemH())...)
	app.Put("/api/v1/catalog/:id", append(write, updateItemH())...)
	app.Delete("/api/v1/catalog/:id", append(write, deleteItemH())...)
}

func listItemsH() fiber.Handler {
	return func(c *fiber.Ctx) error {
		conn := auth.GetConn(c)
		list, err := ListItems(c.Context(), conn)
		if err != nil {
			return fiber.NewError(500, "erro ao listar catálogo")
		}
		if list == nil {
			list = []*CatalogItem{}
		}
		return c.JSON(fiber.Map{"data": list, "error": nil})
	}
}

type itemBody struct {
	Code      string  `json:"code"`
	Name      string  `json:"name"`
	Category  string  `json:"category"`
	Unit      string  `json:"unit"`
	BasePrice float64 `json:"base_price"`
	Active    bool    `json:"active"`
}

func createItemH() fiber.Handler {
	return func(c *fiber.Ctx) error {
		var b itemBody
		if err := c.BodyParser(&b); err != nil {
			return fiber.NewError(400, "corpo inválido")
		}
		if b.Code == "" || b.Name == "" || b.Category == "" || b.Unit == "" {
			return fiber.NewError(400, "código, nome, categoria e unidade são obrigatórios")
		}
		validUnits := map[string]bool{"un": true, "hora": true, "litro": true, "kg": true}
		if !validUnits[b.Unit] {
			return fiber.NewError(400, "unidade inválida (un, hora, litro, kg)")
		}
		conn := auth.GetConn(c)
		item, err := CreateItem(c.Context(), conn, b.Code, b.Name, b.Category, b.Unit, b.BasePrice)
		if err != nil {
			return fiber.NewError(500, "erro ao criar item")
		}
		return c.Status(201).JSON(fiber.Map{"data": item, "error": nil})
	}
}

func updateItemH() fiber.Handler {
	return func(c *fiber.Ctx) error {
		var b itemBody
		if err := c.BodyParser(&b); err != nil {
			return fiber.NewError(400, "corpo inválido")
		}
		if b.Code == "" || b.Name == "" || b.Category == "" || b.Unit == "" {
			return fiber.NewError(400, "código, nome, categoria e unidade são obrigatórios")
		}
		validUnits := map[string]bool{"un": true, "hora": true, "litro": true, "kg": true}
		if !validUnits[b.Unit] {
			return fiber.NewError(400, "unidade inválida (un, hora, litro, kg)")
		}
		conn := auth.GetConn(c)
		item, err := UpdateItem(c.Context(), conn, c.Params("id"), b.Code, b.Name, b.Category, b.Unit, b.BasePrice, b.Active)
		if err != nil {
			if errors.Is(err, pgx.ErrNoRows) {
				return fiber.NewError(404, "item não encontrado")
			}
			return fiber.NewError(500, "erro ao actualizar item")
		}
		return c.JSON(fiber.Map{"data": item, "error": nil})
	}
}

func deleteItemH() fiber.Handler {
	return func(c *fiber.Ctx) error {
		conn := auth.GetConn(c)
		if err := DeleteItem(c.Context(), conn, c.Params("id")); err != nil {
			return fiber.NewError(500, "erro ao eliminar item")
		}
		return c.SendStatus(204)
	}
}