package api

import (
	"log"
	"net/http"

	"git.rosemyrtle.work/personal-finance/server/internal/dal"
	"git.rosemyrtle.work/personal-finance/server/internal/entity"
	"github.com/labstack/echo/v4"
)

//go:generate go run github.com/deepmap/oapi-codegen/v2/cmd/oapi-codegen@v2.1.0 --config=api.cfg.yaml ../../docs/openapi.yaml

type ServerImpl struct {
	Dal dal.DAL
}

func (server *ServerImpl) GetBanks(ctx echo.Context) error {
	log.Print("GetBanks")

	banks, err := server.Dal.Banks()
	if err != nil {
		return ctx.NoContent(http.StatusInternalServerError)
	}

	if len(banks) == 0 {
		return ctx.NoContent(http.StatusNoContent)
	}

	return ctx.JSON(http.StatusOK, convertBanks(banks))
}

func (server *ServerImpl) GetBankById(ctx echo.Context, bankId string) error {
	log.Printf("GetBankById(%v)", bankId)

	bank, err := server.Dal.Bank(bankId)
	if err != nil {
		log.Printf("%v", err)
		return ctx.NoContent(http.StatusInternalServerError)
	}

	if bank == nil {
		return ctx.NoContent(http.StatusNotFound)
	}

	return ctx.JSON(http.StatusOK, convertBank(*bank))
}

func (server *ServerImpl) GetTransactions(ctx echo.Context, params GetTransactionsParams) error {
	log.Print("GetTransactions")

	limit := 100
	if params.Limit != nil {
		limit = int(*params.Limit)
	}

	offset := 0
	if params.Offset != nil {
		offset = int(*params.Offset)
	}

	transactions, err := server.Dal.Transactions(limit, offset)
	if err != nil {
		return err
	}

	if len(transactions) == 0 {
		return ctx.NoContent(http.StatusNoContent)
	}

	return ctx.JSON(http.StatusOK, convertTransactions(transactions))
}

func (server *ServerImpl) GetTransactionById(ctx echo.Context, transactionId int64) error {
	log.Printf("GetTransactionById(%v)", transactionId)

	transaction, err := server.Dal.Transaction(transactionId)
	if err != nil {
		log.Printf("%v", err)
		return ctx.NoContent(http.StatusInternalServerError)
	}

	if transaction == nil {
		return ctx.NoContent(http.StatusNotFound)
	}

	return ctx.JSON(http.StatusOK, entity2transaction(*transaction))
}

func (server *ServerImpl) CreateTransaction(ctx echo.Context) error {
	t := new(Transaction)
	if err := ctx.Bind(t); err != nil {
		log.Printf("%v", err)
		return ctx.NoContent(http.StatusBadRequest)
	}

	transaction, err := server.Dal.InsertTransaction(transaction2entity(*t))
	if err != nil {
		log.Printf("%v", err)
		return ctx.NoContent(http.StatusInternalServerError)
	}

	return ctx.JSON(http.StatusCreated, entity2transaction(transaction))
}

func (server *ServerImpl) UpdateTransaction(ctx echo.Context, transactionId int64) error {
	if exists, err := server.Dal.TransactionExists(entity.TransactionId(transactionId)); err != nil {
		log.Printf("%v", err)
		return ctx.NoContent(http.StatusInternalServerError)
	} else if !exists {
		return ctx.NoContent(http.StatusNotFound)
	}

	update := new(UpdateTransactionJSONBody)
	if err := ctx.Bind(update); err != nil {
		log.Printf("%v", err)
		return ctx.NoContent(http.StatusBadRequest)
	}

	success, err := server.Dal.UpdateTransaction(entity.TransactionId(transactionId), update.Category)
	if err != nil {
		log.Printf("%v", err)
		return ctx.NoContent(http.StatusInternalServerError)
	}

	if !success {
		return ctx.NoContent(http.StatusBadRequest)
	}
	return ctx.NoContent(http.StatusNoContent)
}

func (server *ServerImpl) GetCategories(ctx echo.Context) error {
	categories, err := server.Dal.Categories()
	if err != nil {
		return ctx.NoContent(http.StatusInternalServerError)
	}

	if len(categories) == 0 {
		return ctx.NoContent(http.StatusNoContent)
	}

	return ctx.JSON(http.StatusOK, entities2categories(categories))
}