package manifest_test

import (
	"strings"
	"testing"

	"git.vakhrushev.me/av/convy/internal/manifest"
)

const projectSource = `# What this repository takes.
source = "../conventions"

# A component is a region where every chosen layer holds at once.
[components.backend]
dir = "backend/docs/conventions"
lang = ["go"]
topics = ["errors", "time"]

[components.web]
dir = "web/docs/conventions"
topics = [
  "client-logging",
]
`

func TestAddToListKeepsTheShapeOfTheArray(t *testing.T) {
	out, err := manifest.AddToList([]byte(projectSource), "components.backend", "topics", "logging")
	if err != nil {
		t.Fatal(err)
	}
	body := string(out)
	if !strings.Contains(body, `topics = ["errors", "logging", "time"]`) {
		t.Errorf("a sorted one-line array did not stay sorted and on one line:\n%s", body)
	}
	if !strings.Contains(body, "# A component is a region where every chosen layer holds at once.") {
		t.Errorf("the comment did not survive the edit:\n%s", body)
	}

	out, err = manifest.AddToList(out, "components.web", "topics", "auth")
	if err != nil {
		t.Fatal(err)
	}
	want := "topics = [\n  \"auth\",\n  \"client-logging\",\n]"
	if !strings.Contains(string(out), want) {
		t.Errorf("an array written down a column did not stay a column:\n%s", out)
	}
}

func TestAddToListCreatesTheKeyItDoesNotFind(t *testing.T) {
	out, err := manifest.AddToList([]byte(projectSource), "components.web", "stack", "express")
	if err != nil {
		t.Fatal(err)
	}
	if !strings.Contains(string(out), `stack = ["express"]`) {
		t.Errorf("the missing key was not created:\n%s", out)
	}
}

func TestAddToListRefusesWhatIsThereAlready(t *testing.T) {
	_, err := manifest.AddToList([]byte(projectSource), "components.backend", "topics", "time")
	if err == nil || !strings.Contains(err.Error(), "already holds") {
		t.Errorf("a repeated subscription went through: %v", err)
	}
	if _, err := manifest.AddToList([]byte(projectSource), "components.mobile", "topics", "time"); err == nil {
		t.Errorf("a table that is not there took an entry")
	}
}

func TestRemoveFromList(t *testing.T) {
	out, err := manifest.RemoveFromList([]byte(projectSource), "components.backend", "topics", "errors")
	if err != nil {
		t.Fatal(err)
	}
	if !strings.Contains(string(out), `topics = ["time"]`) {
		t.Errorf("the value was not removed:\n%s", out)
	}
	if _, err := manifest.RemoveFromList([]byte(projectSource), "components.backend", "topics", "logging"); err == nil {
		t.Errorf("removing what is not there went through")
	}
}

func TestAddTableGoesLast(t *testing.T) {
	out, err := manifest.AddTable([]byte(projectSource), "components.mobile",
		[][2]string{{"dir", `"mobile/docs/conventions"`}, {"topics", "[]"}})
	if err != nil {
		t.Fatal(err)
	}
	body := string(out)
	if !strings.Contains(body, "[components.mobile]\ndir = \"mobile/docs/conventions\"\ntopics = []") {
		t.Errorf("the table was not written:\n%s", body)
	}
	if strings.Index(body, "[components.mobile]") < strings.Index(body, "[components.web]") {
		t.Errorf("the new table did not go last:\n%s", body)
	}
	if _, err := manifest.AddTable(out, "components.mobile", nil); err == nil {
		t.Errorf("a second table of the same name went through")
	}
}