package role

import (
	"bytes"
	"context"
	"fmt"
	"time"

	"management/internal/erpserver/model/dto"
	"management/internal/erpserver/model/system"
	"management/internal/erpserver/repository"
	"management/internal/pkg/sqldb"

	"github.com/drhin/logger"
)

type store struct {
	db  *repository.Store
	log *logger.Logger
}

func NewStore(db *repository.Store, log *logger.Logger) system.RoleRepository {
	return &store{
		db:  db,
		log: log,
	}
}

func (s *store) Initialize(ctx context.Context) (*system.Role, error) {
	count, err := s.Count(ctx, dto.SearchDto{})
	if err != nil {
		return nil, err
	}
	if count == 0 {
		obj := system.Role{
			Name:        "Company",
			DisplayName: "公司",
			Vip:         false,
			ParentID:    0,
			ParentPath:  ",0,",
			Status:      0,
			CreatedAt:   time.Now(),
			UpdatedAt:   time.Now(),
		}
		if err := s.Create(ctx, &obj); err != nil {
			return nil, err
		}

		obj1 := system.Role{
			Name:        "SuperAdmin",
			DisplayName: "超级管理员",
			Vip:         true,
			ParentID:    obj.ID,
			ParentPath:  fmt.Sprintf(",0,%d,", obj.ID),
			Status:      0,
			CreatedAt:   time.Now(),
			UpdatedAt:   time.Now(),
		}
		if err := s.Create(ctx, &obj1); err != nil {
			return nil, err
		}
		return &obj1, nil
	}

	return s.GetByVip(ctx, true)

}

func (s *store) Create(ctx context.Context, obj *system.Role) error {
	//goland:noinspection ALL
	const q = `
	INSERT INTO sys_role (
		name, display_name, parent_id, parent_path, vip, status, sort
	) VALUES (
		:name, :display_name, :parent_id, :parent_path, :vip, :status, :sort
	)`

	return sqldb.NamedExecContext(ctx, s.log, s.db.DB(ctx), q, obj)
}

func (s *store) Update(ctx context.Context, obj *system.Role) error {
	const q = `
	UPDATE sys_role
	SET name = :name,
		display_name = :display_name,
		parent_id = :parent_id,
		parent_path = :parent_path,
		status = :status,
		sort = :sort,
		updated_at = :updated_at
	WHERE id = :id;`

	return sqldb.NamedExecContext(ctx, s.log, s.db.DB(ctx), q, obj)
}

func (s *store) GetByVip(ctx context.Context, vip bool) (*system.Role, error) {
	//goland:noinspection ALL
	const q = `
	SELECT
		id, name, display_name, parent_id, parent_path, vip, status, sort, created_at, updated_at
	FROM 
		sys_role
	WHERE 
		vip = :vip;`

	data := map[string]any{
		"vip": vip,
	}

	var role system.Role
	if err := sqldb.NamedQueryStruct(ctx, s.log, s.db.DB(ctx), q, data, &role); err != nil {
		return nil, fmt.Errorf("select vip role: %w", err)
	}

	return &role, nil
}

func (s *store) Get(ctx context.Context, id int32) (*system.Role, error) {
	//goland:noinspection ALL
	const q = `
	SELECT
		id, name, display_name, parent_id, parent_path, vip, status, sort, created_at, updated_at
	FROM 
		sys_role
	WHERE 
		id = :id;`

	data := map[string]any{
		"id": id,
	}

	var role system.Role
	err := sqldb.NamedQueryStruct(ctx, s.log, s.db.DB(ctx), q, data, &role)
	if err != nil {
		return nil, fmt.Errorf("select id role: %w", err)
	}

	return &role, nil
}

func (s *store) All(ctx context.Context) ([]*system.Role, error) {
	//goland:noinspection ALL
	const q = `
	SELECT
		id, name, display_name, parent_id, parent_path, vip, status, sort, created_at, updated_at
	FROM 
		sys_role;`

	data := map[string]any{}

	var roles []system.Role
	err := sqldb.NamedQuerySlice(ctx, s.log, s.db.DB(ctx), q, data, &roles)
	if err != nil {
		return nil, fmt.Errorf("select all role: %w", err)
	}

	return toPointer(roles), nil
}

func (s *store) Count(ctx context.Context, filter dto.SearchDto) (int64, error) {
	//goland:noinspection ALL
	const q = `
	SELECT 
		COUNT(1)
	FROM 
		sys_role`

	data := map[string]any{}

	buf := bytes.NewBufferString(q)
	applyFilter(filter, data, buf)

	var count struct {
		Count int64 `db:"count"`
	}

	err := sqldb.NamedQueryStruct(ctx, s.log, s.db.DB(ctx), buf.String(), data, &count)
	if err != nil {
		return 0, fmt.Errorf("select count role: %w", err)
	}

	return count.Count, nil
}

func (s *store) List(ctx context.Context, filter dto.SearchDto) ([]*system.Role, error) {
	//goland:noinspection ALL
	const q = `
	SELECT
		id, name, display_name, parent_id, parent_path, vip, status, sort, created_at, updated_at
	FROM 
		sys_role`

	data := map[string]any{
		"offset":        (filter.Page - 1) * filter.Rows,
		"rows_per_page": filter.Rows,
	}

	buf := bytes.NewBufferString(q)
	applyFilter(filter, data, buf)

	buf.WriteString(" ORDER BY id DESC")
	buf.WriteString(" LIMIT :rows_per_page OFFSET :offset")

	var roles []system.Role
	err := sqldb.NamedQuerySlice(ctx, s.log, s.db.DB(ctx), buf.String(), data, &roles)
	if err != nil {
		return nil, err
	}
	return toPointer(roles), nil
}

func (s *store) RebuildParentPath(ctx context.Context) error {
	query := `UPDATE sys_role AS tm
	SET parent_path = (SELECT ',' || string_agg(cast(t.parent_id AS VARCHAR), ',') || ','
					   FROM (WITH RECURSIVE temp (id, parent_id) AS (SELECT id, tm.parent_id
																	 FROM sys_role
																	 WHERE id = tm.id
																	 UNION ALL
																	 SELECT sys_role.id, sys_role.parent_id
																	 FROM sys_role,
																		  temp
																	 WHERE sys_role.id = temp.parent_id)
							 SELECT id, parent_id
							 FROM temp
							 ORDER BY id) AS t)
	WHERE tm.status = 0;`
	return sqldb.NamedExecContext(ctx, s.log, s.db.DB(ctx), query, nil)
}

func toPointer(data []system.Role) []*system.Role {
	var res []*system.Role
	for _, v := range data {
		res = append(res, &v)
	}
	return res
}