package ckconfig

import (
	"bytes"
	"context"
	"io"
	"strings"
	"testing"

	commandkit "gitea.maximumdirect.net/eric/CommandKit"
	configkit "gitea.maximumdirect.net/eric/ConfigKit"
)

func TestCompletionUsesInstalledScopeCapabilitiesWithoutAcquisition(t *testing.T) {
	var inputs, states, acquisitions, comparisons int
	suite := Suite[struct{}, struct{}]{
		NewInput: func() struct{} { inputs++; return struct{}{} },
		NewState: func() struct{} { states++; return struct{}{} },
		Scopes: []Scope[struct{}, struct{}]{
			{Name: "app", Operations: []Operation{Diff}, Compare: func(context.Context, ComparisonRequest[struct{}], struct{}) (commandkit.Acquired[[]configkit.Difference], error) {
				comparisons++
				return commandkit.Acquired[[]configkit.Difference]{}, nil
			}},
			{Name: "other", Operations: []Operation{Validate}, Acquire: func(context.Context, Request, struct{}, struct{}) (commandkit.Acquired[View], error) {
				acquisitions++
				return commandkit.Acquired[View]{}, nil
			}},
		},
	}
	app, err := commandkit.New(commandkit.Identity{Name: "example"}, Command(suite), commandkit.Completion("example"))
	if err != nil {
		t.Fatal(err)
	}
	for _, tc := range []struct {
		args           []string
		contains, omit string
	}{
		{[]string{"__complete", "config", "diff", "--scope="}, "app\n", "other\n"},
		{[]string{"__complete", "config", "validate", "--scope="}, "other\n", "all\n"},
		{[]string{"__complete", "config", "diff", "--format="}, "yaml\n", "text\n"},
		{[]string{"__complete", "config", "validate", "--format="}, "text\n", "invalid\n"},
		{[]string{"__complete", "config", "diff", "--against-config=fixtures/"}, ":0\n", ":4\n"},
	} {
		var output bytes.Buffer
		outcome := app.Execute(context.Background(), tc.args, commandkit.Streams{Out: &output, Err: io.Discard})
		if outcome.Status != 0 || !strings.Contains(output.String(), tc.contains) || strings.Contains(output.String(), tc.omit) {
			t.Fatalf("query %q outcome=%#v output=%q", tc.args, outcome, output.String())
		}
	}
	allSuite := Suite[struct{}, struct{}]{Scopes: []Scope[struct{}, struct{}]{
		{Name: "app", Operations: []Operation{Validate}, Acquire: suite.Scopes[1].Acquire},
		{Name: "other", Operations: []Operation{Validate}, Acquire: suite.Scopes[1].Acquire},
	}}
	allApp, err := commandkit.New(commandkit.Identity{Name: "example"}, Command(allSuite), commandkit.Completion("example"))
	if err != nil {
		t.Fatal(err)
	}
	var allOutput bytes.Buffer
	allOutcome := allApp.Execute(context.Background(), []string{"__complete", "config", "validate", "--scope="}, commandkit.Streams{Out: &allOutput})
	if allOutcome.Status != 0 || !strings.Contains(allOutput.String(), "all\n") {
		t.Fatalf("all-scope query outcome=%#v output=%q", allOutcome, allOutput.String())
	}
	if inputs != 0 || states != 0 || acquisitions != 0 || comparisons != 0 {
		t.Fatalf("completion ran suite work: %d %d %d %d", inputs, states, acquisitions, comparisons)
	}
}