package main

import (
	"strings"
	"testing"
)

func TestLinkParsing(t *testing.T) {
	tests := []struct {
		name         string
		data         []byte
		links        []*OrgLinks
		expected_err string
	}{
		{
			name: "No links file",
		},
		{
			name: "Empty links file",
			data: []byte("[]"),
		},
		{
			name: "Single package linked",
			data: []byte(`[{"Source": "pool/foo", "Target": "pkg"}]`),
			links: []*OrgLinks{
				&OrgLinks{
					Source: "pool/foo",
					Target: "pkg",
				},
			},
		},
		{
			name: "Multiple packages linked, resorted",
			data: []byte(`[{"Source": "pool/foo", "Target": "pkg"}, {"Source": "pool/abc", "Target": "abc"}, {"Source": "abc/aaa", "Target": "zzz"}]`),
			links: []*OrgLinks{
				&OrgLinks{
					Source: "pool/abc",
					Target: "abc",
				},
				&OrgLinks{
					Source: "pool/foo",
					Target: "pkg",
				},
				&OrgLinks{
					Source: "abc/aaa",
					Target: "zzz",
				},
			},
		},
		{
			name:         "Broken source file",
			data:         []byte(`[{"Source": "pool/foo"}, Source": "pool/abc", "Target": "abc"}, {"Source": "abc/aaa", "Target": "zzz"}]`),
			expected_err: "invalid character 'S' looking for beginning of value",
		},
		{
			name:         "Missing target",
			data:         []byte(`[{"Source": "abc/aaa"}]`),
			expected_err: "Missing Target for Source link: abc/aaa",
		},
		{
			name:         "Bad source link",
			data:         []byte(`[{"Source": "abc"}]`),
			expected_err: "Invalid Source: abc",
		},
		{
			name:         "Bad source link",
			data:         []byte(`[{"Source": "/foo"}]`),
			expected_err: "Invalid Source: /foo",
		},
		{
			name:         "Bad source link",
			data:         []byte(`[{"Source": "foo/"}]`),
			expected_err: "Invalid Source: foo/",
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			res, err := ParseProjectLinks(test.data)
			if len(test.expected_err) > 0 && err == nil {
				t.Error("Expected an error:", test.expected_err, "; but got nothing")
			} else if err != nil && len(test.expected_err) == 0 {
				t.Fatal("Unexpected error:", err)
			} else if err != nil && !strings.Contains(err.Error(), test.expected_err) {
				t.Fatal("Expected an error:", test.expected_err, "; but got:", err)
			}

			if len(res) != len(test.links) {
				t.Fatal("len of result", len(res), "vs. expected", len(test.links))
			}

			// verify that returned data is present and in expected order
			for i := range test.links {
				if *test.links[i] != *res[i] {
					t.Error("index", i, "expected", *test.links[i], "received", *res[i])
				}
			}
		})
	}
}

func TestLinkUpdater(t *testing.T) {
	tests := []struct {
		name       string
		mock_setup func()
	}{
		{
			name: "no-op update",
		},
	}

	for _, test := range tests {
	}
}