package model

import (
	"context"
	"errors"
	"fmt"
	"github.com/zeromicro/go-zero/core/stores/sqlc"
	"github.com/zeromicro/go-zero/core/stores/sqlx"
	"strings"
	"time"
)

var _ RoleModel = (*customRoleModel)(nil)

type (
	// RoleModel is an interface to be customized, add more methods here,
	// and implement the added methods in customRoleModel.
	RoleModel interface {
		roleModel
		IncrementID(ctx context.Context) (int64, error)
		TransUpdateStatusByRoleID(
			ctx context.Context,
			session sqlx.Session,
			status int64,
			roleId string) error
		TransUpdateDisplayNameByRoleID(
			ctx context.Context,
			session sqlx.Session,
			roleId string,
			displayName string) error
		Find(ctx context.Context) ([]*Role, error)
		Count(ctx context.Context, role *Role) (int64, error)
		SearchRoles(ctx context.Context, role *Role, pageIndex, PageSize int64) (result []Role, err error)
	}

	customRoleModel struct {
		*defaultRoleModel
	}

	RoleFilter struct {
		PageIndex   *int64
		PageSize    *int64
		RoleId      *string
		DisplayName *string
		Status      *int64
	}
)

// NewRoleModel returns a model for the database table.
func NewRoleModel(conn sqlx.SqlConn) RoleModel {
	return &customRoleModel{
		defaultRoleModel: newRoleModel(conn),
	}
}

func (m *customRoleModel) IncrementID(ctx context.Context) (int64, error) {
	var maxID int64
	query := fmt.Sprintf("select IFNULL(MAX(`id`), 0) from %s", m.table)
	err := m.conn.QueryRowCtx(ctx, &maxID, query)
	if err != nil {
		return 0, err
	}

	// 返回最大 ID 加 1
	return maxID + 1, nil
}

func (m *customRoleModel) TransUpdateDisplayNameByRoleID(
	ctx context.Context,
	session sqlx.Session,
	displayName string,
	roleId string) error {
	query := fmt.Sprintf("update %s set `display_name` = ?, `update_time` = ? where `role_id` = ?", m.table)
	// 執行更新操作
	updateTime := time.Now().UTC().Unix()
	_, err := session.ExecCtx(ctx, query, displayName, updateTime, roleId)
	return err
}

func (m *customRoleModel) TransUpdateStatusByRoleID(
	ctx context.Context,
	session sqlx.Session,
	status int64,
	roleId string) error {
	query := fmt.Sprintf("update %s set `status` = ?, `update_time` = ? where `role_id` = ?", m.table)
	// 執行更新操作
	updateTime := time.Now().UTC().Unix()
	_, err := session.ExecCtx(ctx, query, status, updateTime, roleId)
	return err
}

func (m *defaultRoleModel) Find(ctx context.Context) ([]*Role, error) {
	query := fmt.Sprintf("select %s from %s", roleRows, m.table)
	var resp []*Role
	err := m.conn.QueryRowsCtx(ctx, &resp, query)
	switch {
	case err == nil:
		return resp, nil
	case errors.Is(err, sqlc.ErrNotFound):
		return nil, ErrNotFound
	default:
		return nil, err
	}
}

func (m *defaultRoleModel) Count(ctx context.Context, role *Role) (int64, error) {
	var conditions []string
	var args []any

	// 構建條件
	if role.RoleId != "" {
		conditions = append(conditions, "`role_id` = ?")
		args = append(args, role.RoleId)
	}
	if role.DisplayName != "" {
		conditions = append(conditions, "`display_name` = ?")
		args = append(args, role.DisplayName)
	}

	if role.Status != 0 {
		conditions = append(conditions, "`status` = ?")
		args = append(args, role.Status)
	}

	// 構建基礎查詢語句
	query := fmt.Sprintf("select COUNT(*) from %s", m.table)

	// 如果有條件，添加 WHERE 子句
	if len(conditions) > 0 {
		query += " where " + strings.Join(conditions, " AND ")
	}

	var resp int64
	err := m.conn.QueryRowCtx(ctx, &resp, query, args...)
	switch {
	case err == nil:
		return resp, nil
	case errors.Is(err, sqlc.ErrNotFound):
		return 0, ErrNotFound
	default:
		return 0, err
	}
}

func (m *customRoleModel) SearchRoles(ctx context.Context, role *Role, pageIndex, PageSize int64) (result []Role, err error) {
	var conditions []string
	var args []any

	// 構建條件
	if role.RoleId != "" {
		conditions = append(conditions, "`role_id` = ?")
		args = append(args, role.RoleId)
	}
	if role.DisplayName != "" {
		conditions = append(conditions, "`display_name` = ?")
		args = append(args, role.DisplayName)
	}

	if role.Status != 0 {
		conditions = append(conditions, "`status` = ?")
		args = append(args, role.Status)
	}

	// 構建基礎查詢語句
	query := fmt.Sprintf("select * from %s", m.table)

	// 如果有條件，添加 WHERE 子句
	if len(conditions) > 0 {
		query += " where " + strings.Join(conditions, " AND ")
	}

	// 添加排序和分頁
	query += " order by `id` desc limit ? offset ?"
	args = append(args, PageSize, (pageIndex-1)*PageSize)

	// 執行查詢
	err = m.conn.QueryRowCtx(ctx, &result, query, args...)
	switch {
	case err == nil:
		return result, nil
	case errors.Is(err, sqlc.ErrNotFound):
		return nil, ErrNotFound
	default:
		return nil, err
	}
}