package lingxian

import (
	"chatapp3-golang/internal/common"
	"chatapp3-golang/internal/model"
	"chatapp3-golang/internal/utils"
	"context"
	"net/http"
	"strings"
	"time"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
)

func (s *Service) defaultRuntimeConfig(sysOrigin string) runtimeConfig {
	return runtimeConfig{
		SysOrigin:   normalizeSysOrigin(sysOrigin),
		Profile:     profileProd,
		GameListURL: defaultIfBlank(s.cfg.Lingxian.GameListURL, defaultListURL),
		AppKey:      strings.TrimSpace(s.cfg.Lingxian.AppKey),
	}
}

func (s *Service) activeProfile(ctx context.Context, sysOrigin string) (string, error) {
	sysOrigin = normalizeSysOrigin(sysOrigin)
	var row model.LingxianProviderConfig
	err := s.db.WithContext(ctx).
		Where("sys_origin = ? AND active = ?", sysOrigin, true).
		Order("update_time DESC").
		Limit(1).
		First(&row).Error
	if err == nil {
		return normalizeProfile(row.Profile), nil
	}
	if err == gorm.ErrRecordNotFound {
		return profileProd, nil
	}
	return "", err
}

func (s *Service) requestProfile(ctx context.Context, sysOrigin, profile string) (string, error) {
	if strings.TrimSpace(profile) != "" {
		return normalizeProfile(profile), nil
	}
	return s.activeProfile(ctx, sysOrigin)
}

func (s *Service) resolveRuntimeConfigForProfile(ctx context.Context, sysOrigin, profile string) (runtimeConfig, error) {
	sysOrigin = normalizeSysOrigin(sysOrigin)
	profile = normalizeProfile(profile)
	base := s.defaultRuntimeConfig(sysOrigin)
	base.Profile = profile

	var row model.LingxianProviderConfig
	err := s.db.WithContext(ctx).
		Where("sys_origin = ? AND profile = ?", sysOrigin, profile).
		Limit(1).
		First(&row).Error
	if err == nil {
		return configToRuntime(base, row), nil
	}
	if err == gorm.ErrRecordNotFound {
		return base, nil
	}
	return runtimeConfig{}, err
}

func (s *Service) requireRuntimeConfigForProfile(ctx context.Context, sysOrigin, profile string) (runtimeConfig, error) {
	cfg, err := s.resolveRuntimeConfigForProfile(ctx, sysOrigin, profile)
	if err != nil {
		return runtimeConfig{}, err
	}
	if strings.TrimSpace(cfg.GameListURL) == "" || strings.TrimSpace(cfg.AppKey) == "" {
		return runtimeConfig{}, common.NewAppError(http.StatusBadRequest, "lingxian_config_missing", "lingxian config is missing")
	}
	return cfg, nil
}

func (s *Service) GetProviderConfig(ctx context.Context, sysOrigin, profile string) (*ProviderConfigItem, error) {
	sysOrigin = normalizeSysOrigin(sysOrigin)
	activeProfile, err := s.activeProfile(ctx, sysOrigin)
	if err != nil {
		return nil, err
	}
	profile, err = s.requestProfile(ctx, sysOrigin, profile)
	if err != nil {
		return nil, err
	}
	runtimeCfg, err := s.resolveRuntimeConfigForProfile(ctx, sysOrigin, profile)
	if err != nil {
		return nil, err
	}

	var row model.LingxianProviderConfig
	_ = s.db.WithContext(ctx).
		Where("sys_origin = ? AND profile = ?", sysOrigin, profile).
		Limit(1).
		First(&row).Error

	return &ProviderConfigItem{
		ID:            row.ID,
		SysOrigin:     runtimeCfg.SysOrigin,
		Profile:       runtimeCfg.Profile,
		ActiveProfile: activeProfile,
		Active:        runtimeCfg.Profile == activeProfile,
		GameListURL:   defaultIfBlank(runtimeCfg.GameListURL, defaultListURL),
		AppKey:        runtimeCfg.AppKey,
		TestUID:       runtimeCfg.TestUID,
		TestToken:     runtimeCfg.TestToken,
		TestRoomID:    runtimeCfg.TestRoomID,
		UpdateTime:    formatTime(row.UpdateTime),
	}, nil
}

func (s *Service) SaveProviderConfig(ctx context.Context, req SaveProviderConfigRequest) (*ProviderConfigItem, error) {
	sysOrigin := normalizeSysOrigin(req.SysOrigin)
	profile := normalizeProfile(req.Profile)
	gameListURL := defaultIfBlank(req.GameListURL, defaultListURL)
	appKey := strings.TrimSpace(req.AppKey)
	if gameListURL == "" {
		return nil, common.NewAppError(http.StatusBadRequest, "game_list_url_required", "gameListUrl is required")
	}
	if appKey == "" {
		return nil, common.NewAppError(http.StatusBadRequest, "app_key_required", "appKey is required")
	}

	id, err := utils.NextID()
	if err != nil {
		return nil, err
	}
	now := time.Now()
	row := model.LingxianProviderConfig{
		ID:          id,
		SysOrigin:   sysOrigin,
		Profile:     profile,
		GameListURL: gameListURL,
		AppKey:      appKey,
		TestUID:     strings.TrimSpace(req.TestUID),
		TestToken:   strings.TrimSpace(req.TestToken),
		TestRoomID:  strings.TrimSpace(req.TestRoomID),
		CreateTime:  now,
		UpdateTime:  now,
	}

	var activeCount int64
	if err := s.db.WithContext(ctx).
		Model(&model.LingxianProviderConfig{}).
		Where("sys_origin = ? AND active = ?", sysOrigin, true).
		Count(&activeCount).Error; err != nil {
		return nil, err
	}
	row.Active = activeCount == 0

	if err := s.db.WithContext(ctx).Clauses(clause.OnConflict{
		Columns: []clause.Column{{Name: "sys_origin"}, {Name: "profile"}},
		DoUpdates: clause.AssignmentColumns([]string{
			"game_list_url", "app_key", "test_uid", "test_token", "test_room_id", "update_time",
		}),
	}).Create(&row).Error; err != nil {
		return nil, err
	}
	if row.Active {
		s.clearJavaGameListCache(ctx)
	}
	return s.GetProviderConfig(ctx, sysOrigin, profile)
}

func (s *Service) ActivateProviderProfile(ctx context.Context, req ActivateProviderProfileRequest) (*ProviderConfigItem, error) {
	sysOrigin := normalizeSysOrigin(req.SysOrigin)
	profile := normalizeProfile(req.Profile)
	var row model.LingxianProviderConfig
	if err := s.db.WithContext(ctx).
		Where("sys_origin = ? AND profile = ?", sysOrigin, profile).
		Limit(1).
		First(&row).Error; err != nil {
		if err == gorm.ErrRecordNotFound {
			return nil, common.NewAppError(http.StatusBadRequest, "profile_config_missing", "profile config is missing")
		}
		return nil, err
	}

	now := time.Now()
	if err := s.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
		if err := tx.Model(&model.LingxianProviderConfig{}).
			Where("sys_origin = ?", sysOrigin).
			Updates(map[string]any{"active": false, "update_time": now}).Error; err != nil {
			return err
		}
		return tx.Model(&model.LingxianProviderConfig{}).
			Where("sys_origin = ? AND profile = ?", sysOrigin, profile).
			Updates(map[string]any{"active": true, "update_time": now}).Error
	}); err != nil {
		return nil, err
	}
	s.clearJavaGameListCache(ctx)
	return s.GetProviderConfig(ctx, sysOrigin, profile)
}

func (s *Service) clearJavaGameListCache(ctx context.Context) {
	if s.cache == nil {
		return
	}
	_ = s.cache.Del(ctx, "GAME_LIST").Err()
}