package http

import (
	"fmt"
	"net/http"
	"time"

	"git.javil.eu/jacob1123/budgeteer/postgres"
	"github.com/gin-gonic/gin"
	"github.com/google/uuid"
)

func getUUID(c *gin.Context, name string) (uuid.UUID, error) {
	value, succ := c.GetPostForm(name)
	if !succ {
		return uuid.UUID{}, fmt.Errorf("not set")
	}

	id, err := uuid.Parse(value)
	if err != nil {
		return uuid.UUID{}, fmt.Errorf("not a valid uuid: %w", err)
	}

	return id, nil
}

func getNullUUID(c *gin.Context, name string) (uuid.NullUUID, error) {
	value, succ := c.GetPostForm(name)
	if !succ {
		return uuid.NullUUID{}, nil
	}

	id, err := uuid.Parse(value)
	if err != nil {
		return uuid.NullUUID{}, fmt.Errorf("not a valid uuid: %w", err)
	}

	return uuid.NullUUID{
		UUID:  id,
		Valid: true,
	}, nil
}

func (h *Handler) newTransaction(c *gin.Context) {
	transactionMemo, _ := c.GetPostForm("memo")
	transactionAccountID, err := getUUID(c, "account_id")
	if err != nil {
		c.AbortWithError(http.StatusNotAcceptable, err)
		return
	}

	transactionCategoryID, err := getNullUUID(c, "category_id")
	if err != nil {
		c.AbortWithError(http.StatusNotAcceptable, err)
		return
	}

	transactionDate, succ := c.GetPostForm("date")
	if !succ {
		c.AbortWithError(http.StatusNotAcceptable, fmt.Errorf("date missing"))
		return
	}

	transactionDateValue, err := time.Parse("2006-01-02", transactionDate)
	if err != nil {
		c.AbortWithError(http.StatusNotAcceptable, fmt.Errorf("date is not a valid date"))
		return
	}

	transactionAmount, succ := c.GetPostForm("amount")
	if !succ {
		c.AbortWithError(http.StatusNotAcceptable, fmt.Errorf("amount missing"))
		return
	}

	amount := postgres.Numeric{}
	amount.Set(transactionAmount)
	new := postgres.CreateTransactionParams{
		Memo:       transactionMemo,
		Date:       transactionDateValue,
		Amount:     amount,
		AccountID:  transactionAccountID,
		PayeeID:    uuid.NullUUID{},
		CategoryID: transactionCategoryID,
	}
	_, err = h.Service.CreateTransaction(c.Request.Context(), new)
	if err != nil {
		c.AbortWithError(http.StatusInternalServerError, fmt.Errorf("create transaction: %w", err))
		return
	}
}