package gameplay_service

import (
	"context"
	"errors"
	"evening_detective_server/internal/modules/cleaner"
	"evening_detective_server/internal/modules/storytelling"
	"evening_detective_server/internal/repos/actions_repo"
	"evening_detective_server/internal/repos/applications_repo"
	"evening_detective_server/internal/repos/games_repo"
	"evening_detective_server/internal/repos/teams_repo"
	"evening_detective_server/internal/services/game_model"
	"evening_detective_server/internal/services/scenarios_service"
	"fmt"
)

var (
	// ErrTeamNotFound indicates that a team was not found.
	ErrTeamNotFound = errors.New("команда не найдена")
	// ErrGameNotFound indicates that a game was not found.
	ErrGameNotFound = errors.New("игра не найдена")
)

// GameplayService handles team gameplay operations.
type GameplayService struct {
	gamesRepo        *games_repo.GamesRepo
	teamsRepo        *teams_repo.TeamsRepo
	scenarioService  *scenarios_service.ScenarioService
	storyteller      storytelling.IStory
	actionsRepo      *actions_repo.ActionsRepo
	applicationsRepo *applications_repo.ApplicationsRepo
	cleaner          cleaner.ICleaner
	domain           string
}

// NewGameplayService creates a gameplay service.
func NewGameplayService(
	gamesRepo *games_repo.GamesRepo,
	teamsRepo *teams_repo.TeamsRepo,
	scenarioService *scenarios_service.ScenarioService,
	storyteller storytelling.IStory,
	actionsRepo *actions_repo.ActionsRepo,
	applicationsRepo *applications_repo.ApplicationsRepo,
	cleaner cleaner.ICleaner,
	domain string,
) *GameplayService {
	return &GameplayService{
		gamesRepo:        gamesRepo,
		teamsRepo:        teamsRepo,
		scenarioService:  scenarioService,
		storyteller:      storyteller,
		actionsRepo:      actionsRepo,
		applicationsRepo: applicationsRepo,
		cleaner:          cleaner,
		domain:           domain,
	}
}

// GiveTeamApplications grants an application to a team.
func (s *GameplayService) GiveTeamApplications(ctx context.Context, teamID int, name string) error {
	return mapGameplayError(s.applicationsRepo.UpdateApplicationStatus(ctx, teamID, name, "done"))
}

// GetTeamActions returns the current story, game, and available team actions.
func (s *GameplayService) GetTeamActions(ctx context.Context, teamID int, password string) (*storytelling.Story, *game_model.Game, []actions_repo.Action, error) {
	team, err := s.teamsRepo.GetTeamByID(ctx, teamID)
	if err != nil {
		return nil, nil, nil, mapGameplayError(err)
	}

	if team.Password != password || team.ParticipationStatus == "cancelled" {
		return nil, nil, nil, fmt.Errorf("%w: %v", ErrTeamNotFound, teams_repo.ErrTeamNotFound)
	}

	game, err := s.gamesRepo.GetGameByID(ctx, team.GameID)
	if err != nil {
		return nil, nil, nil, mapGameplayError(err)
	}
	if game.Status == "finish" {
		return &storytelling.Story{}, game_model.MapGame(game, s.domain), nil, nil
	}

	actions, err := s.actionsRepo.GetActionsByTeamID(ctx, teamID)
	if err != nil {
		return nil, nil, nil, mapGameplayError(err)
	}

	scenario, err := s.scenarioService.GetFullScenarioByID(ctx, game.ScenarioID)
	if err != nil {
		return nil, nil, nil, mapGameplayError(err)
	}

	codes := make([]string, len(actions))
	for i, action := range actions {
		codes[i] = action.Code
	}
	story := s.storyteller.GetStory(scenario.Story, codes)
	filterTeamStory(story, game.Format)
	return story, game_model.MapGame(game, s.domain), actions, nil
}

// AddTeamAction records an action performed by a team.
func (s *GameplayService) AddTeamAction(ctx context.Context, teamID int, password string, actionCode string, viaMCP bool) error {
	team, err := s.teamsRepo.GetTeamByID(ctx, teamID)
	if err != nil {
		return mapGameplayError(err)
	}

	if team.Password != password || team.ParticipationStatus == "cancelled" {
		return fmt.Errorf("%w: %v", ErrTeamNotFound, teams_repo.ErrTeamNotFound)
	}

	_, err = s.actionsRepo.AddAction(ctx, teamID, actionCode, viaMCP)
	if err != nil {
		return mapGameplayError(err)
	}
	if team.ParticipationStatus == "pending" {
		if err := s.teamsRepo.ConfirmParticipationByFirstAction(ctx, teamID); err != nil {
			return mapGameplayError(err)
		}
	}

	game, err := s.gamesRepo.GetGameByID(ctx, team.GameID)
	if err != nil {
		return mapGameplayError(err)
	}

	actionDetails, err := s.actionsRepo.GetActionsByTeamID(ctx, teamID)
	if err != nil {
		return mapGameplayError(err)
	}

	scenario, err := s.scenarioService.GetFullScenarioByID(ctx, game.ScenarioID)
	if err != nil {
		return mapGameplayError(err)
	}

	actions := make([]string, len(actionDetails))
	for i, action := range actionDetails {
		actions[i] = action.Code
	}
	teamStory := s.storyteller.GetStory(scenario.Story, actions)

	lastPlace := teamStory.Places[len(teamStory.Places)-1]

	for _, application := range lastPlace.Applications {
		app := newApplication(application, s.domain)
		app.Name = s.cleaner.ClearText(app.Name)
		if _, err := s.applicationsRepo.AddApplication(ctx, teamID, app.Name, app.Image, app.FileType); err != nil {
			return mapGameplayError(err)
		}
	}

	return nil
}

// DeleteLastTeamAction removes the latest action for a team.
func (s *GameplayService) DeleteLastTeamAction(ctx context.Context, teamID int) error {
	team, err := s.teamsRepo.GetTeamByID(ctx, teamID)
	if err != nil {
		return mapGameplayError(err)
	}

	game, err := s.gamesRepo.GetGameByID(ctx, team.GameID)
	if err != nil {
		return mapGameplayError(err)
	}

	actionDetails, err := s.actionsRepo.GetActionsByTeamID(ctx, teamID)
	if err != nil {
		return mapGameplayError(err)
	}

	scenario, err := s.scenarioService.GetFullScenarioByID(ctx, game.ScenarioID)
	if err != nil {
		return mapGameplayError(err)
	}

	actions := make([]string, len(actionDetails))
	for i, action := range actionDetails {
		actions[i] = action.Code
	}
	teamStory := s.storyteller.GetStory(scenario.Story, actions)

	lastPlace := teamStory.Places[len(teamStory.Places)-1]

	for _, application := range lastPlace.Applications {
		if err := s.applicationsRepo.DeleteApplicationByTeamIDAndName(ctx, teamID, application.Name); err != nil {
			return mapGameplayError(err)
		}
	}

	return mapGameplayError(s.actionsRepo.DeleteLastActionByTeamID(ctx, teamID))
}

func mapGameplayError(err error) error {
	if errors.Is(err, teams_repo.ErrTeamNotFound) {
		return fmt.Errorf("%w: %v", ErrTeamNotFound, err)
	}
	if errors.Is(err, games_repo.ErrGameNotFound) {
		return fmt.Errorf("%w: %v", ErrGameNotFound, err)
	}
	return err
}