package postgres

import (
	"context"

	"gorm.io/gorm"

	"github.com/break/junhong_cmp_fiber/internal/model"
	"github.com/break/junhong_cmp_fiber/internal/store"
)

// PermissionStore 权限数据访问层
type PermissionStore struct {
	db *gorm.DB
}

// NewPermissionStore 创建权限 Store
func NewPermissionStore(db *gorm.DB) *PermissionStore {
	return &PermissionStore{db: db}
}

// Create 创建权限
func (s *PermissionStore) Create(ctx context.Context, permission *model.Permission) error {
	return s.db.WithContext(ctx).Create(permission).Error
}

// GetByID 根据 ID 获取权限
func (s *PermissionStore) GetByID(ctx context.Context, id uint) (*model.Permission, error) {
	var permission model.Permission
	if err := s.db.WithContext(ctx).First(&permission, id).Error; err != nil {
		return nil, err
	}
	return &permission, nil
}

// GetByCode 根据权限编码获取权限
func (s *PermissionStore) GetByCode(ctx context.Context, code string) (*model.Permission, error) {
	var permission model.Permission
	if err := s.db.WithContext(ctx).Where("perm_code = ?", code).First(&permission).Error; err != nil {
		return nil, err
	}
	return &permission, nil
}

// Update 更新权限
func (s *PermissionStore) Update(ctx context.Context, permission *model.Permission) error {
	return s.db.WithContext(ctx).Save(permission).Error
}

// Delete 软删除权限
func (s *PermissionStore) Delete(ctx context.Context, id uint) error {
	return s.db.WithContext(ctx).Delete(&model.Permission{}, id).Error
}

// List 查询权限列表
func (s *PermissionStore) List(ctx context.Context, opts *store.QueryOptions, filters map[string]interface{}) ([]*model.Permission, int64, error) {
	var permissions []*model.Permission
	var total int64

	query := s.db.WithContext(ctx).Model(&model.Permission{})

	// 应用过滤条件
	if name, ok := filters["perm_name"].(string); ok && name != "" {
		query = query.Where("perm_name LIKE ?", "%"+name+"%")
	}
	if code, ok := filters["perm_code"].(string); ok && code != "" {
		query = query.Where("perm_code LIKE ?", "%"+code+"%")
	}
	if permType, ok := filters["perm_type"].(int); ok {
		query = query.Where("perm_type = ?", permType)
	}
	if platform, ok := filters["platform"].(string); ok && platform != "" {
		query = query.Where("platform = ?", platform)
	}
	if parentID, ok := filters["parent_id"].(uint); ok {
		query = query.Where("parent_id = ?", parentID)
	}
	if status, ok := filters["status"].(int); ok {
		query = query.Where("status = ?", status)
	}

	// 计算总数
	if err := query.Count(&total).Error; err != nil {
		return nil, 0, err
	}

	// 分页
	if opts == nil {
		opts = store.DefaultQueryOptions()
	}
	offset := (opts.Page - 1) * opts.PageSize
	query = query.Offset(offset).Limit(opts.PageSize)

	// 排序
	if opts.OrderBy != "" {
		query = query.Order(opts.OrderBy)
	} else {
		query = query.Order("sort ASC, id ASC")
	}

	// 执行查询
	if err := query.Find(&permissions).Error; err != nil {
		return nil, 0, err
	}

	return permissions, total, nil
}

// GetByIDs 根据 ID 列表获取权限
func (s *PermissionStore) GetByIDs(ctx context.Context, ids []uint) ([]*model.Permission, error) {
	var permissions []*model.Permission
	if err := s.db.WithContext(ctx).Where("id IN ?", ids).Find(&permissions).Error; err != nil {
		return nil, err
	}
	return permissions, nil
}

// GetAll 获取所有权限（用于构建权限树）
func (s *PermissionStore) GetAll(ctx context.Context) ([]*model.Permission, error) {
	var permissions []*model.Permission
	if err := s.db.WithContext(ctx).Order("sort ASC, id ASC").Find(&permissions).Error; err != nil {
		return nil, err
	}
	return permissions, nil
}

// GetByPlatform 根据端口获取权限列表
// platform: 端口类型（all/web/h5），如果为空则返回所有权限
func (s *PermissionStore) GetByPlatform(ctx context.Context, platform string) ([]*model.Permission, error) {
	var permissions []*model.Permission
	query := s.db.WithContext(ctx).Where("status = ?", 1) // 只获取启用的权限

	if platform != "" {
		// 获取指定端口的权限或通用权限（platform='all'）
		query = query.Where("platform = ? OR platform = ?", platform, "all")
	}

	if err := query.Order("sort ASC, id ASC").Find(&permissions).Error; err != nil {
		return nil, err
	}
	return permissions, nil
}