package v1

import (
	"context"
	"database/sql"
	"errors"

	"github.com/golang-jwt/jwt/v5"
	echojwt "github.com/labstack/echo-jwt/v4"
	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
	swagger "github.com/swaggo/echo-swagger"

	_ "git.jamestombleson.com/jtom38/newsbot-api/docs"
	"git.jamestombleson.com/jtom38/newsbot-api/internal/services"
)

type Handler struct {
	Router *echo.Echo
	//Db     *database.Queries
	config services.Configs
	repo   services.RepositoryService
}

const (
	ErrParameterIdMissing = "The requested parameter ID was not found."
	ErrParameterMissing   = "The requested parameter was not found found:"
	ErrUnableToParseId    = "Unable to parse the requested ID"

	ErrRecordMissing        = "The requested record was not found"
	ErrFailedToCreateRecord = "The record was not created due to a database problem"
	ErrFailedToUpdateRecord = "The requested record was not updated due to a database problem"

	ErrUserUnknown         = "User is unknown"
	ErrYouDontOwnTheRecord = "The record requested does not belong to you"

	ResponseMessageSuccess = "Success"
)

var (
	ErrIdValueMissing        string = "id value is missing"
	ErrValueNotUuid          string = "a value given was expected to be a uuid but was not correct."
	ErrNoRecordFound         string = "no record was found."
	ErrUnableToConvertToJson string = "Unable to convert to json"
)

func NewServer(ctx context.Context, configs services.Configs, conn *sql.DB) *Handler {
	s := &Handler{
		config: configs,
		repo:   services.NewRepositoryService(conn),
	}

	jwtConfig := echojwt.Config{
		NewClaimsFunc: func(c echo.Context) jwt.Claims {
			return new(JwtToken)
		},
		SigningKey: []byte(configs.JwtSecret),
	}

	router := echo.New()
	router.Pre(middleware.RemoveTrailingSlash())
	router.Pre(middleware.Logger())
	router.Pre(middleware.Recover())
	router.GET("/swagger/*", swagger.WrapHandler)

	v1 := router.Group("/api/v1")
	articles := v1.Group("/articles")
	articles.Use(echojwt.WithConfig(jwtConfig))
	articles.GET("", s.listArticles)
	articles.GET(":id", s.getArticle)
	articles.GET(":id/details", s.getArticleDetails)
	articles.GET("by/source/:id", s.ListArticlesBySourceId)

	//dwh := v1.Group("/discord/webhooks")
	//dwh.GET("/", s.ListDiscordWebHooks)
	//dwh.POST("/new", s.NewDiscordWebHook)
	//dwh.GET("/by/serverAndChannel", s.GetDiscordWebHooksByServerAndChannel)
	//dwh.GET("/:ID", s.GetDiscordWebHooksById)
	//dwh.DELETE("/:ID", s.deleteDiscordWebHook)
	//dwh.POST("/:ID/disable", s.disableDiscordWebHook)
	//dwh.POST("/:ID/enable", s.enableDiscordWebHook)

	//queue := v1.Group("/queue")
	//queue.GET("/discord/webhooks", s.ListDiscordWebhookQueue) // TODO this needs to be reworked

	//settings := v1.Group("/settings")
	//settings.GET("/", s.getSettings)

	sources := v1.Group("/sources")
	sources.Use(echojwt.WithConfig(jwtConfig))
	sources.GET("", s.listSources)
	sources.GET("/by/source", s.listSourcesBySource)
	sources.GET("/by/sourceAndName", s.GetSourceBySourceAndName)
	//sources.POST("/new/reddit", s.newRedditSource)
	//sources.POST("/new/youtube", s.newYoutubeSource)
	//sources.POST("/new/twitch", s.newTwitchSource)
	sources.POST("/new/rss", s.newRssSource)
	sources.GET("/:id", s.getSource)
	sources.DELETE("/:id", s.deleteSources)
	sources.POST("/:id/disable", s.disableSource)
	sources.POST("/:id/enable", s.enableSource)

	users := v1.Group("/users")
	users.POST("/login", s.AuthLogin)
	users.POST("/register", s.AuthRegister)
	users.Use(echojwt.WithConfig(jwtConfig))
	users.POST("/scopes/add", s.AddScopes)
	users.POST("/scopes/remove", s.RemoveScopes)
	users.POST("/refresh/token", s.RefreshJwtToken)
	users.POST("/refresh/sessionToken", s.NewSessionToken)

	s.Router = router
	return s
}

//type ApiStatusModel struct {
//	StatusCode int    `json:"status"`
//	Message    string `json:"message"`
//}

//type ApiError struct {
//	*ApiStatusModel
//}

//func (s *Handler) WriteError(c echo.Context, errMessage error, HttpStatusCode int) error {
//	return c.JSON(HttpStatusCode, domain.BaseResponse{
//		Message: errMessage.Error(),
//		IsError: true,
//	})
//}

//func (s *Handler) WriteMessage(c echo.Context, msg string, HttpStatusCode int) error {
//	return c.JSON(HttpStatusCode, domain.BaseResponse{
//		Message: msg,
//	})
//}

//func (s *Handler) InternalServerErrorResponse(c echo.Context, msg string) error {
//	return c.JSON(http.StatusInternalServerError, domain.BaseResponse{
//		Message: msg,
//	})
//}

//func (s *Handler) UnauthorizedResponse(c echo.Context, msg string) error {
//	return c.JSON(http.StatusUnauthorized, domain.BaseResponse{
//		Message: msg,
//	})
//}

// If the token is not valid then an json error will be returned.
// If the token has the wrong scope, a json error will be returned.
// If the token passes all the checks, it is valid and is returned back to the caller.
func (s *Handler) ValidateJwtToken(c echo.Context, requiredScope string) (JwtToken, error) {
	token, err := s.getJwtTokenFromContext(c)
	if err != nil {
		return JwtToken{}, errors.New(ErrJwtMissing)
	}

	err = token.hasExpired()
	if err != nil {
		return JwtToken{}, errors.New(ErrJwtExpired)
	}

	err = token.hasScope(requiredScope)
	if err != nil {
		return JwtToken{}, errors.New(ErrJwtScopeMissing)
	}

	if token.Iss != s.config.ServerAddress {
		return JwtToken{}, errors.New(ErrJwtInvalidIssuer)
	}

	// If you are the built in admin account, skip the username and session token check
	if token.UserName == "admin" {
		return token, nil
	}

	user, err := s.repo.Users.GetUser(c.Request().Context(), token.UserName)
	if err != nil {
		return JwtToken{}, errors.New("user record not found")
	}

	if user.SessionToken != token.SessionToken {
		return JwtToken{}, errors.New("invalid session token")
	}

	return token, nil
}

func (s *Handler) GetUserIdFromJwtToken(c echo.Context) int64 {
	token, err := s.getJwtTokenFromContext(c)
	if err != nil {
		return -1
	}

	return token.GetUserId()
}