package dept

import (
	"context"
	"errors"
	"fmt"
	"testing"
	"time"

	deptModel "perms-system-server/internal/model/dept"
	"perms-system-server/internal/response"
	"perms-system-server/internal/svc"
	"perms-system-server/internal/testutil"
	"perms-system-server/internal/testutil/ctxhelper"
	"perms-system-server/internal/types"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func insertDeptRaw(ctx context.Context, svcCtx *svc.ServiceContext, parentId int64, name, path string) (int64, error) {
	now := time.Now().Unix()
	result, err := svcCtx.SysDeptModel.Insert(ctx, &deptModel.SysDept{
		ParentId:   parentId,
		Name:       name,
		Path:       path,
		Sort:       0,
		DeptType:   "NORMAL",
		Status:     1,
		CreateTime: now,
		UpdateTime: now,
	})
	if err != nil {
		return 0, err
	}
	id, _ := result.LastInsertId()
	d, err := svcCtx.SysDeptModel.FindOne(ctx, id)
	if err != nil {
		return id, err
	}
	d.Path = fmt.Sprintf("%s%d/", path, id)
	d.UpdateTime = now
	return id, svcCtx.SysDeptModel.Update(ctx, d)
}

// TC-0081: 父部门不存在
func TestCreateDept_ParentNotFound(t *testing.T) {
	ctx := ctxhelper.SuperAdminCtx()
	svcCtx := svc.NewServiceContext(testutil.GetTestConfig())

	l := NewCreateDeptLogic(ctx, svcCtx)
	resp, err := l.CreateDept(&types.CreateDeptReq{
		ParentId: 999999999,
		Name:     "orphan_" + testutil.UniqueId(),
	})
	assert.Nil(t, resp)
	require.Error(t, err)

	var ce *response.CodeError
	require.True(t, errors.As(err, &ce))
	assert.Equal(t, 404, ce.Code())
	assert.Contains(t, ce.Error(), "父部门不存在")
}

// TC-0079: 创建顶级部门
func TestCreateDept_TopLevel_ViaRawInsert(t *testing.T) {
	ctx := context.Background()
	svcCtx := svc.NewServiceContext(testutil.GetTestConfig())
	conn := testutil.GetTestSqlConn()
	name := "dept_top_" + testutil.UniqueId()

	id, err := insertDeptRaw(ctx, svcCtx, 0, name, "/")
	require.NoError(t, err)
	require.Greater(t, id, int64(0))
	t.Cleanup(func() { testutil.CleanTable(ctx, conn, "`sys_dept`", id) })

	dept, err := svcCtx.SysDeptModel.FindOne(ctx, id)
	require.NoError(t, err)
	assert.Equal(t, name, dept.Name)
	assert.Equal(t, int64(0), dept.ParentId)
	assert.Equal(t, fmt.Sprintf("/%d/", id), dept.Path)
	assert.Equal(t, int64(1), dept.Status)
}

// TC-0080: 创建子部门
func TestCreateDept_Child_ViaRawInsert(t *testing.T) {
	ctx := context.Background()
	svcCtx := svc.NewServiceContext(testutil.GetTestConfig())
	conn := testutil.GetTestSqlConn()

	parentId, err := insertDeptRaw(ctx, svcCtx, 0, "par_"+testutil.UniqueId(), "/")
	require.NoError(t, err)
	parentDept, _ := svcCtx.SysDeptModel.FindOne(ctx, parentId)

	childId, err := insertDeptRaw(ctx, svcCtx, parentId, "child_"+testutil.UniqueId(), parentDept.Path)
	require.NoError(t, err)

	t.Cleanup(func() { testutil.CleanTable(ctx, conn, "`sys_dept`", childId, parentId) })

	child, err := svcCtx.SysDeptModel.FindOne(ctx, childId)
	require.NoError(t, err)
	assert.Equal(t, parentId, child.ParentId)
	assert.Equal(t, fmt.Sprintf("/%d/%d/", parentId, childId), child.Path)
}

// TC-0087: 多层嵌套(5层)
func TestCreateDept_MultiLevel(t *testing.T) {
	ctx := context.Background()
	svcCtx := svc.NewServiceContext(testutil.GetTestConfig())
	conn := testutil.GetTestSqlConn()

	l1Id, err := insertDeptRaw(ctx, svcCtx, 0, "L1_"+testutil.UniqueId(), "/")
	require.NoError(t, err)
	l1, _ := svcCtx.SysDeptModel.FindOne(ctx, l1Id)

	l2Id, err := insertDeptRaw(ctx, svcCtx, l1Id, "L2_"+testutil.UniqueId(), l1.Path)
	require.NoError(t, err)
	l2, _ := svcCtx.SysDeptModel.FindOne(ctx, l2Id)

	l3Id, err := insertDeptRaw(ctx, svcCtx, l2Id, "L3_"+testutil.UniqueId(), l2.Path)
	require.NoError(t, err)

	t.Cleanup(func() { testutil.CleanTable(ctx, conn, "`sys_dept`", l3Id, l2Id, l1Id) })

	d3, err := svcCtx.SysDeptModel.FindOne(ctx, l3Id)
	require.NoError(t, err)
	assert.Equal(t, fmt.Sprintf("/%d/%d/%d/", l1Id, l2Id, l3Id), d3.Path)
}

// TC-0087: 多层嵌套(5层)
func TestCreateDept_FiveLevelNesting(t *testing.T) {
	ctx := context.Background()
	svcCtx := svc.NewServiceContext(testutil.GetTestConfig())
	conn := testutil.GetTestSqlConn()

	var ids []int64
	parentId := int64(0)
	parentPath := "/"

	for level := 1; level <= 5; level++ {
		id, err := insertDeptRaw(ctx, svcCtx, parentId, fmt.Sprintf("L%d_%s", level, testutil.UniqueId()), parentPath)
		require.NoError(t, err)
		ids = append(ids, id)

		dept, err := svcCtx.SysDeptModel.FindOne(ctx, id)
		require.NoError(t, err)
		parentId = id
		parentPath = dept.Path
	}

	t.Cleanup(func() {
		for i := len(ids) - 1; i >= 0; i-- {
			testutil.CleanTable(ctx, conn, "`sys_dept`", ids[i])
		}
	})

	deepest, err := svcCtx.SysDeptModel.FindOne(ctx, ids[4])
	require.NoError(t, err)
	expected := fmt.Sprintf("/%d/%d/%d/%d/%d/", ids[0], ids[1], ids[2], ids[3], ids[4])
	assert.Equal(t, expected, deepest.Path)
}

// TC-0082: 不传DeptType默认NORMAL
func TestCreateDept_DefaultDeptType(t *testing.T) {
	ctx := ctxhelper.SuperAdminCtx()
	svcCtx := svc.NewServiceContext(testutil.GetTestConfig())
	conn := testutil.GetTestSqlConn()

	l := NewCreateDeptLogic(ctx, svcCtx)
	resp, err := l.CreateDept(&types.CreateDeptReq{
		ParentId: 0,
		Name:     "deftype_" + testutil.UniqueId(),
	})
	require.NoError(t, err)
	require.NotNil(t, resp)
	t.Cleanup(func() { testutil.CleanTable(ctx, conn, "`sys_dept`", resp.Id) })

	d, err := svcCtx.SysDeptModel.FindOne(ctx, resp.Id)
	require.NoError(t, err)
	assert.Equal(t, "NORMAL", d.DeptType)
	assert.Contains(t, d.Path, fmt.Sprintf("/%d/", resp.Id))
}

// TC-0083: 传DeptType=DEV
func TestCreateDept_DevDeptType(t *testing.T) {
	ctx := ctxhelper.SuperAdminCtx()
	svcCtx := svc.NewServiceContext(testutil.GetTestConfig())
	conn := testutil.GetTestSqlConn()

	l := NewCreateDeptLogic(ctx, svcCtx)
	resp, err := l.CreateDept(&types.CreateDeptReq{
		ParentId: 0,
		Name:     "devtype_" + testutil.UniqueId(),
		DeptType: "DEV",
	})
	require.NoError(t, err)
	require.NotNil(t, resp)
	t.Cleanup(func() { testutil.CleanTable(ctx, conn, "`sys_dept`", resp.Id) })

	d, err := svcCtx.SysDeptModel.FindOne(ctx, resp.Id)
	require.NoError(t, err)
	assert.Equal(t, "DEV", d.DeptType)
	assert.Contains(t, d.Path, fmt.Sprintf("/%d/", resp.Id))
}

// TC-0088: 通过Logic创建+验证Path
func TestCreateDept_ViaLogic_PathCorrect(t *testing.T) {
	ctx := ctxhelper.SuperAdminCtx()
	svcCtx := svc.NewServiceContext(testutil.GetTestConfig())
	conn := testutil.GetTestSqlConn()

	l := NewCreateDeptLogic(ctx, svcCtx)
	parentResp, err := l.CreateDept(&types.CreateDeptReq{
		ParentId: 0,
		Name:     "parent_" + testutil.UniqueId(),
	})
	require.NoError(t, err)

	childResp, err := l.CreateDept(&types.CreateDeptReq{
		ParentId: parentResp.Id,
		Name:     "child_" + testutil.UniqueId(),
	})
	require.NoError(t, err)

	t.Cleanup(func() {
		testutil.CleanTable(ctx, conn, "`sys_dept`", childResp.Id, parentResp.Id)
	})

	parent, err := svcCtx.SysDeptModel.FindOne(ctx, parentResp.Id)
	require.NoError(t, err)
	assert.Equal(t, fmt.Sprintf("/%d/", parentResp.Id), parent.Path)

	child, err := svcCtx.SysDeptModel.FindOne(ctx, childResp.Id)
	require.NoError(t, err)
	assert.Equal(t, fmt.Sprintf("/%d/%d/", parentResp.Id, childResp.Id), child.Path)
}

// TC-0511: createDept非超管拒绝
func TestCreateDept_NonSuperAdminRejected(t *testing.T) {
	ctx := ctxhelper.AdminCtx("test_product")
	svcCtx := svc.NewServiceContext(testutil.GetTestConfig())
	l := NewCreateDeptLogic(ctx, svcCtx)
	_, err := l.CreateDept(&types.CreateDeptReq{Name: "test", Sort: 1})
	require.Error(t, err)
	var ce *response.CodeError
	require.True(t, errors.As(err, &ce))
	assert.Equal(t, 403, ce.Code())
}

var _ = deptModel.ErrNotFound