package server

import (
	"net/http"
	"time"

	"git.javil.eu/jacob1123/budgeteer/postgres"
	"github.com/google/uuid"
	"github.com/labstack/echo/v4"
)

type FilterTransactionsRequest struct {
	CategoryID string    `json:"category_id"`
	PayeeID    string    `json:"payee_id"`
	AccountID  string    `json:"account_id"`
	FromDate   time.Time `json:"from_date"`
	ToDate     time.Time `json:"to_date"`
}

func (h *Handler) filteredTransactions(c echo.Context) error {
	budgetID := c.Param("budgetid")
	budgetUUID, err := uuid.Parse(budgetID)
	if err != nil {
		return echo.NewHTTPError(http.StatusBadRequest, err)
	}

	var request FilterTransactionsRequest
	err = c.Bind(&request)
	if err != nil {
		return echo.NewHTTPError(http.StatusBadRequest, err)
	}

	params := postgres.GetFilteredTransactionsParams{
		BudgetID: budgetUUID,
		FromDate: request.FromDate,
		ToDate:   request.ToDate,
	}
	params.CategoryID, params.FilterCategory = parseEmptyUUID(request.CategoryID)
	accountID, filterAccount := parseEmptyUUID(request.AccountID)
	params.AccountID, params.FilterAccount = accountID.UUID, filterAccount
	params.PayeeID, params.FilterPayee = parseEmptyUUID(request.PayeeID)

	transactions, err := h.Service.GetFilteredTransactions(c.Request().Context(), params)
	if err != nil {
		return echo.NewHTTPError(http.StatusInternalServerError, err)
	}

	return c.JSON(http.StatusOK, TransactionsResponse{nil, transactions})
}

func parseEmptyUUID(value string) (uuid.NullUUID, bool) {
	if value == "" {
		return uuid.NullUUID{}, false
	}

	val, err := uuid.Parse(value)
	if err != nil {
		return uuid.NullUUID{}, false
	}

	return uuid.NullUUID{val, true}, true
}

func (h *Handler) problematicTransactions(c echo.Context) error {
	budgetID := c.Param("budgetid")
	budgetUUID, err := uuid.Parse(budgetID)
	if err != nil {
		return echo.NewHTTPError(http.StatusBadRequest, err)
	}

	transactions, err := h.Service.GetProblematicTransactions(c.Request().Context(), budgetUUID)
	if err != nil {
		return err
	}

	return c.JSON(http.StatusOK, TransactionsResponse{nil, transactions})
}

func (h *Handler) transactionsForAccount(c echo.Context) error {
	accountID := c.Param("accountid")
	accountUUID, err := uuid.Parse(accountID)
	if err != nil {
		return echo.NewHTTPError(http.StatusBadRequest, err)
	}

	account, err := h.Service.GetAccount(c.Request().Context(), accountUUID)
	if err != nil {
		return echo.NewHTTPError(http.StatusNotFound, err)
	}

	transactions, err := h.Service.GetTransactionsForAccount(c.Request().Context(), accountUUID)
	if err != nil {
		return echo.NewHTTPError(http.StatusNotFound, err)
	}

	return c.JSON(http.StatusOK, TransactionsResponse{&account, transactions})
}

type TransactionsResponse struct {
	Account      *postgres.Account
	Transactions []postgres.DisplayTransaction
}

type EditAccountRequest struct {
	Name     string `json:"name"`
	OnBudget bool   `json:"onBudget"`
	IsOpen   bool   `json:"isOpen"`
}

func (h *Handler) editAccount(c echo.Context) error {
	accountID := c.Param("accountid")
	accountUUID, err := uuid.Parse(accountID)
	if err != nil {
		return echo.NewHTTPError(http.StatusBadRequest, err)
	}

	var request EditAccountRequest
	err = c.Bind(&request)
	if err != nil {
		return echo.NewHTTPError(http.StatusBadRequest, err)
	}

	updateParams := postgres.UpdateAccountParams{
		Name:     request.Name,
		OnBudget: request.OnBudget,
		IsOpen:   request.IsOpen,
		ID:       accountUUID,
	}
	account, err := h.Service.UpdateAccount(c.Request().Context(), updateParams)
	if err != nil {
		return echo.NewHTTPError(http.StatusNotFound, err)
	}

	return h.getBudget(c, account.BudgetID)
}