package http

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

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

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

	transactionCategoryID, err := getNullUUIDFromForm(c, "category_id")
	if err != nil {
		c.AbortWithError(http.StatusNotAcceptable, fmt.Errorf("category_id: %w", err))
		return
	}

	transactionPayeeID, err := getNullUUIDFromForm(c, "payee_id")
	if err != nil {
		c.AbortWithError(http.StatusNotAcceptable, fmt.Errorf("payee_id: %w", 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)

	transactionUUID, err := getNullUUIDFromParam(c, "transactionid")
	if err != nil {
		c.AbortWithError(http.StatusInternalServerError, fmt.Errorf("parse transaction id: %w", err))
		return
	}

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

		return
	}

	_, delete := c.GetPostForm("delete")
	if delete {
		err = h.Service.DeleteTransaction(c.Request.Context(), transactionUUID.UUID)
		if err != nil {
			c.AbortWithError(http.StatusInternalServerError, fmt.Errorf("delete transaction: %w", err))
		}
		return
	}

	update := postgres.UpdateTransactionParams{
		ID:         transactionUUID.UUID,
		Memo:       transactionMemo,
		Date:       transactionDateValue,
		Amount:     amount,
		AccountID:  transactionAccountID,
		PayeeID:    transactionPayeeID,
		CategoryID: transactionCategoryID,
	}
	err = h.Service.UpdateTransaction(c.Request.Context(), update)
	if err != nil {
		c.AbortWithError(http.StatusInternalServerError, fmt.Errorf("update transaction: %w", err))
	}
}