package main

import (
	"context"
	"embed"
	"fmt"
	"net/http"
	"strconv"
	"strings"
	"sync"
	"time"

	"git.lehouerou.net/laurent/sorare"
	"git.lehouerou.net/laurent/sorare/football"
	"git.lehouerou.net/laurent/sorare/types"
	"github.com/dustin/go-humanize"
	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
	"github.com/pkg/errors"
	"github.com/robfig/cron/v3"
	"github.com/rs/zerolog/log"
	"github.com/samber/lo"
	"github.com/sourcegraph/conc"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	"github.com/uptrace/bun"

	"git.lehouerou.net/laurent/sorarebuddy/cmd/common"
	"git.lehouerou.net/laurent/sorarebuddy/db"
	"git.lehouerou.net/laurent/sorarebuddy/model"
	"git.lehouerou.net/laurent/sorarebuddy/sorare_utils"
)

var (
	//go:embed all:dist
	dist embed.FS

	//go:embed dist/index.html
	indexHTML     embed.FS
	distDirFS     = echo.MustSubFS(dist, "dist/assets")
	distIndexHtml = echo.MustSubFS(indexHTML, "dist")
)

var Cmd = &cobra.Command{
	Use:               "console",
	Short:             "console",
	Long:              `console`,
	RunE:              run,
	PersistentPreRunE: common.CmdPreRunE,
}

func main() {
	common.Start(Cmd)
}

func init() {
	common.InitParams(Cmd)

	Cmd.PersistentFlags().Bool("devmode", false, "Dev mode")
	_ = viper.BindPFlag("devmode", Cmd.PersistentFlags().Lookup("devmode"))
	viper.SetDefault("devmode", false)
}

func errorResponse(err error) map[string]interface{} {
	return map[string]interface{}{"error": err.Error()}
}

func run(cmd *cobra.Command, _ []string) error {
	var wg conc.WaitGroup

	ctx := cmd.Context()
	dbconn, ok := ctx.Value(common.DbContextKey).(*bun.DB)
	if !ok {
		return errors.New("db not found in context")
	}

	sorareClient, ok := ctx.Value(common.SorareContextKey).(*sorare.Sorare)
	if !ok {
		return errors.New("sorare not found in context")
	}

	devmode := viper.GetBool("devmode")

	dbclient := db.NewClient(dbconn)

	e := echo.New()
	e.FileFS("/*", "index.html", distIndexHtml)
	e.StaticFS("/assets", distDirFS)

	e.Use(middleware.Recover())
	e.HTTPErrorHandler = func(err error, c echo.Context) {
		statusCode := http.StatusInternalServerError
		if he, ok := err.(*echo.HTTPError); ok {
			statusCode = he.Code
		}

		log.Error().
			Err(err).
			Str("method", c.Request().Method).
			Str("url", c.Request().URL.String()).
			Int("status", statusCode).
			Msg("HTTP error encountered")

		if statusCode == http.StatusInternalServerError {
			if err := c.JSON(statusCode, errorResponse(errors.New("internal server error"))); err != nil {
				log.Error().Err(err).Msg("error while sending error response")
			}
		} else {
			if err := c.JSON(statusCode, errorResponse(err)); err != nil {
				log.Error().Err(err).Msg("error while sending error response")
			}
		}
	}
	e.Use(func(next echo.HandlerFunc) echo.HandlerFunc {
		return func(c echo.Context) error {
			start := time.Now()
			err := next(c)
			latency := time.Since(start)

			latencyDisplay := fmt.Sprintf("%dms", latency.Milliseconds())
			if latency > time.Second {
				latencyDisplay = fmt.Sprintf("%.2fs", latency.Seconds())
			}
			clientIP := c.RealIP()

			log.Info().Msgf(
				"%d %4s | %s | %6s | <- %6s | -> %6s | %s",
				c.Response().Status,
				c.Request().Method,
				clientIP,
				latencyDisplay,
				humanize.Bytes(uint64(c.Request().ContentLength)),
				humanize.Bytes(uint64(c.Response().Size)),
				c.Request().RequestURI,
			)

			return err
		}
	})
	e.Use(middleware.GzipWithConfig(middleware.GzipConfig{
		Level: 5,
	}))
	e.Use(middleware.CORSWithConfig(middleware.CORSConfig{
		AllowOrigins: []string{"https://www.sorareplus.xyz", "http://localhost:5173"},
	}))
	e.Use(middleware.SecureWithConfig(middleware.SecureConfig{
		XFrameOptions:         "DENY",
		ContentTypeNosniff:    "nosniff",
		XSSProtection:         "1; mode=block",
		ContentSecurityPolicy: "default-src 'self'; img-src 'self' https://assets.sorare.com https://frontend-assets.sorare.com; script-src 'self' 'wasm-unsafe-eval'; style-src 'self' 'unsafe-inline'",
		HSTSMaxAge:            31536000,
		ReferrerPolicy:        "no-referrer",
	}))

	s := &ApiServer{
		sorare: sorareClient,
		db:     dbclient,
		e:      e,
	}

	api := e.Group("api")

	api.POST("/search/multi", s.SearchMulti)

	fixture := api.Group("/fixture")
	fixture.GET("/all", s.GetAllFixtures)
	fixture.GET("/:slug/games", s.GetFixtureGames)

	player := api.Group("/player")
	player.GET("/:slug", s.GetPlayer)
	player.GET("/:slug/games", s.GetPlayerGames)
	api.GET("/zone/all", s.GetAllZones)
	api.GET("/competition/club", s.GetAllClubCompetitions)
	api.POST("/rankings/single", s.SingleRankings)
	api.GET("/user/:slug/cards", s.GetUserCards)

	wg.Go(func() {
		defer func() {
			log.Debug().Msg("http server stopped")
		}()
		err := e.Start(":8080")
		if err != nil && !errors.Is(err, http.ErrServerClosed) {
			log.Error().Err(err).Msg("running api http server")
		}
	})

	c := cron.New()
	if !devmode {
		_, err := c.AddFunc("0 6 * * *", func() {
			us := sorare_utils.NewUpdateService(sorareClient, db.NewClient(dbconn))
			err := us.UpdateLastClosedStartedAndOpenedFixtures(ctx)
			if err != nil {
				log.Error().Err(err).Msg("syncing database")
			}
		})
		if err != nil {
			return errors.Wrap(err, "adding database sync job")
		}

		var updateMutex sync.Mutex
		_, err = c.AddFunc("*/1 * * * *", func() {
			if updateMutex.TryLock() {
				defer updateMutex.Unlock()
				us := sorare_utils.NewUpdateService(sorareClient, db.NewClient(dbconn))
				err := us.UpdateCurrentlyPlayingGames(ctx)
				if err != nil {
					log.Error().Err(err).Msg("syncing database")
				}
			} else {
				log.Info().Msg("Previous update still running, skipping this cycle.")
			}
		})
		if err != nil {
			return errors.Wrap(err, "adding database sync job")
		}
	}
	c.Start()

	log.Info().Msgf("%d scheduled jobs", len(c.Entries()))
	for _, entry := range c.Entries() {
		log.Info().Msgf("next @ %s", entry.Next)
	}

	<-ctx.Done()
	c.Stop()
	ctxhttp, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	err := e.Shutdown(ctxhttp)
	if err != nil {
		log.Error().Err(err).Msg("shutting down api http server")
	}

	wg.Wait()
	return nil
}

type ApiServer struct {
	sorare *sorare.Sorare
	db     *db.Client
	e      *echo.Echo
}

func (s *ApiServer) GetAllZones(c echo.Context) error {
	ctx := c.Request().Context()
	res, err := s.db.Zones.GetAll(ctx)
	if err != nil {
		return err
	}
	return c.JSON(http.StatusOK, res)
}

func (s *ApiServer) GetPlayer(c echo.Context) error {
	ctx := c.Request().Context()
	slug := c.Param("slug")
	res, err := s.db.Players.GetOne(ctx, slug)
	if err != nil {
		return err
	}
	return c.JSON(http.StatusOK, res)
}

func (s *ApiServer) SingleRankings(c echo.Context) error {
	ctx := c.Request().Context()
	var opts db.SingleRankingsOptions
	if err := c.Bind(&opts); err != nil {
		return errors.Wrap(err, "parsing ranking request options")
	}
	res, err := s.db.Players.SingleRankings(ctx, opts)
	if err != nil {
		return errors.Wrap(err, "getting rankings")
	}
	return c.JSON(http.StatusOK, res)
}

func (s *ApiServer) GetAllClubCompetitions(c echo.Context) error {
	ctx := c.Request().Context()
	zones := c.QueryParam("zones")
	zoneArray := lo.Filter(strings.Split(zones, ","), func(s string, _ int) bool {
		return s != ""
	})
	res, err := s.db.Competitions.GetAllClubCompetitions(ctx, lo.Map(zoneArray, func(s string, _ int) int {
		return lo.Must(strconv.Atoi(s))
	}))
	if err != nil {
		return err
	}
	return c.JSON(http.StatusOK, res)
}

func (s *ApiServer) GetAllFixtures(c echo.Context) error {
	ctx := c.Request().Context()
	res, err := s.db.Fixtures.GetAll(ctx)
	if err != nil {
		return err
	}
	return c.JSON(http.StatusOK, res)
}

func (s *ApiServer) GetFixtureGames(c echo.Context) error {
	ctx := c.Request().Context()
	slug := c.Param("slug")
	res, err := s.db.Games.GetByFixture(ctx, slug)
	if err != nil {
		return err
	}
	return c.JSON(http.StatusOK, res)
}

func (s *ApiServer) GetUserCards(c echo.Context) error {
	ctx := c.Request().Context()
	slug := c.Param("slug")
	res, err := s.sorare.Users.FootballCards(slug).Get(ctx, football.CardsParams{
		Rarities: []types.Rarity{types.RarityLimited, types.RarityRare, types.RaritySuperRare, types.RarityUnique},
	})
	if err != nil {
		return err
	}
	return c.JSON(http.StatusOK, lo.Map(res, func(card football.Card, _ int) model.Card {
		return model.NewCardFromSorare(card)
	}))
}

func (s *ApiServer) GetPlayerGames(c echo.Context) error {
	ctx := c.Request().Context()
	slug := c.Param("slug")
	res, err := s.db.GamePlayers.GetByPlayer(ctx, slug)
	if err != nil {
		return err
	}
	return c.JSON(http.StatusOK, res)
}

func (s *ApiServer) SearchMulti(c echo.Context) error {
	ctx := c.Request().Context()

	var searchText struct {
		Query string `json:"query"`
		Limit int    `json:"limit"`
	}
	if err := c.Bind(&searchText); err != nil {
		return c.JSON(http.StatusBadRequest, errorResponse(err))
	}

	var res struct {
		Players []model.Player `json:"players"`
		Teams   []model.Team   `json:"teams"`
	}

	players, err := s.db.Players.SearchByDisplayName(ctx, searchText.Query, searchText.Limit)
	if err != nil {
		return err
	}
	res.Players = players

	teams, err := s.db.Teams.SearchByDisplayName(ctx, searchText.Query, searchText.Limit)
	if err != nil {
		return err
	}
	res.Teams = teams

	return c.JSON(http.StatusOK, res)
}