package chunks

import (
	"bytes"
	"fmt"
	"testing"

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

var parseErrorTests = []struct{ in, expected string }{
	{"{%unknown_tag%}", "unknown tag"},
	// {"{%if syntax error%}", "unterminated if tag"},
	// {"{%if syntax error%}{%endif%}", "parse error"},
}

var renderTests = []struct{ in, expected string }{
	// {"{%if syntax error%}{%endif%}", "parse error"},
	{"{{12}}", "12"},
	{"{{x}}", "123"},
	{"{{page.title}}", "Introduction"},
	{"{{ar[1]}}", "second"},
}

var renderTestContext = Context{map[string]interface{}{
	"x": 123,
	"obj": map[string]interface{}{
		"a": 1,
	},
	"animals": []string{"zebra", "octopus", "giraffe", "Sally Snake"},
	"pages": []map[string]interface{}{
		{"category": "business"},
		{"category": "celebrities"},
		{},
		{"category": "lifestyle"},
		{"category": "sports"},
		{},
		{"category": "technology"},
	},
	"sort_prop": []map[string]interface{}{
		{"weight": 1},
		{"weight": 5},
		{"weight": 3},
		{"weight": nil},
	},
	"ar": []string{"first", "second", "third"},
	"page": map[string]interface{}{
		"title": "Introduction",
	},
},
}

func TestParseErrors(t *testing.T) {
	for i, test := range parseErrorTests {
		t.Run(fmt.Sprintf("%02d", i), func(t *testing.T) {
			tokens := Scan(test.in, "")
			ast, err := Parse(tokens)
			require.Nilf(t, ast, test.in)
			require.Errorf(t, err, test.in)
			require.Containsf(t, err.Error(), test.expected, test.in)
		})
	}
}
func TestRender(t *testing.T) {
	for i, test := range renderTests {
		t.Run(fmt.Sprintf("%02d", i), func(t *testing.T) {
			tokens := Scan(test.in, "")
			// fmt.Println(tokens)
			ast, err := Parse(tokens)
			require.NoErrorf(t, err, test.in)
			// fmt.Println(MustYAML(ast))
			buf := new(bytes.Buffer)
			err = ast.Render(buf, renderTestContext)
			require.NoErrorf(t, err, test.in)
			require.Equalf(t, test.expected, buf.String(), test.in)
		})
	}
}