package test

import (
	"sort"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/tal-tech/go-zero/tools/goctl/api/parser/g4/ast"
	"github.com/tal-tech/go-zero/tools/goctl/api/parser/g4/gen/api"
)

var importAccept = func(p *api.ApiParserParser, visitor *ast.ApiVisitor) interface{} {
	return p.ImportSpec().Accept(visitor)
}

func TestImport(t *testing.T) {
	t.Run("matched", func(t *testing.T) {
		v, err := parser.Accept(importAccept, `import "foo.api"`)
		assert.Nil(t, err)

		list := v.([]*ast.ImportExpr)
		for _, each := range list {
			assert.True(t, each.Equal(&ast.ImportExpr{
				Import: ast.NewTextExpr("import"),
				Value:  ast.NewTextExpr(`"foo.api"`),
			}))
		}
	})

	t.Run("matched block", func(t *testing.T) {
		v, err := parser.Accept(importAccept, `
		import (
			/**foo*/
			"foo.api"
			/**bar*/
			"bar.api"
			/**foobar*/
			"foo/bar.api"/**foobar*/
		)
		`)
		assert.Nil(t, err)

		list := v.([]*ast.ImportExpr)
		expected := []*ast.ImportExpr{
			{
				Import: ast.NewTextExpr("import"),
				Value:  ast.NewTextExpr(`"foo.api"`),
				DocExpr: []ast.Expr{
					ast.NewTextExpr("/**foo*/"),
				},
			},
			{
				Import: ast.NewTextExpr("import"),
				Value:  ast.NewTextExpr(`"bar.api"`),
				DocExpr: []ast.Expr{
					ast.NewTextExpr("/**bar*/"),
				},
			},
			{
				Import: ast.NewTextExpr("import"),
				Value:  ast.NewTextExpr(`"foo/bar.api"`),
				DocExpr: []ast.Expr{
					ast.NewTextExpr("/**foobar*/"),
				},
				CommentExpr: ast.NewTextExpr("/**foobar*/"),
			},
		}

		sort.Slice(list, func(i, j int) bool {
			return list[i].Value.Line() < list[j].Value.Line()
		})
		sort.Slice(expected, func(i, j int) bool {
			return expected[i].Value.Line() < expected[j].Value.Line()
		})

		assert.True(t, len(list) == len(expected))
		for index, each := range list {
			assert.True(t, each.Equal(expected[index]))
		}
	})

	t.Run("matched doc", func(t *testing.T) {
		v, err := parser.Accept(importAccept, `
		/**doc*/
		import "foo.api" /**line doc*/`)
		assert.Nil(t, err)

		list := v.([]*ast.ImportExpr)
		for _, each := range list {
			assert.True(t, each.Equal(&ast.ImportExpr{
				Import: ast.NewTextExpr("import"),
				Value:  ast.NewTextExpr(`"foo.api"`),
				DocExpr: []ast.Expr{
					ast.NewTextExpr("/**doc*/"),
				},
				CommentExpr: ast.NewTextExpr("/**line doc*/"),
			}))
		}
	})

	t.Run("matched comment", func(t *testing.T) {
		v, err := parser.Accept(importAccept, `
		// comment block
		import "foo.api" // line comment`)
		assert.Nil(t, err)

		list := v.([]*ast.ImportExpr)
		for _, each := range list {
			assert.True(t, each.Equal(&ast.ImportExpr{
				Import: ast.NewTextExpr("import"),
				Value:  ast.NewTextExpr(`"foo.api"`),
				DocExpr: []ast.Expr{
					ast.NewTextExpr("// comment block"),
				},
				CommentExpr: ast.NewTextExpr("// line comment"),
			}))
		}
	})

	t.Run("mismatched import", func(t *testing.T) {
		_, err := parser.Accept(importAccept, `
		 "foo.api"`)
		assert.Error(t, err)

		_, err = parser.Accept(importAccept, `
		 impor "foo.api"`)
		assert.Error(t, err)
	})

	t.Run("mismatched value", func(t *testing.T) {
		_, err := parser.Accept(importAccept, `
		 import "foo"`)
		assert.Error(t, err)

		_, err = parser.Accept(importAccept, `
		 import ""`)
		assert.Error(t, err)

		_, err = parser.Accept(importAccept, `
		 import `)
		assert.Error(t, err)
	})
}