package commandkit_test

import (
	"bytes"
	"context"
	"errors"
	"fmt"
	commandkit "gitea.maximumdirect.net/eric/CommandKit"
	configkit "gitea.maximumdirect.net/eric/ConfigKit"
	"gitea.maximumdirect.net/eric/promptkit"
	"strings"
	"testing"
)

func TestStandardConfigurationCancellationBoundaries(t *testing.T) {
	for _, operation := range []string{"validate", "show", "sources", "explain"} {
		for _, before := range []bool{true, false} {
			t.Run(fmt.Sprintf("%s/before=%t", operation, before), func(t *testing.T) {
				ctx, cancel := context.WithCancel(context.Background())
				defer cancel()
				if before {
					cancel()
				}
				loads, contexts := 0, 0
				scope, err := commandkit.NewConfigKitScope[struct{}, struct{}]("app", "", func(context.Context, commandkit.Selection, struct{}) (*configkit.Result[struct{}], error) {
					loads++
					cancel()
					return configkit.Load(configkit.NoSource(), configkit.Options[struct{}]{})
				})
				if err != nil {
					t.Fatal(err)
				}
				app, _ := commandkit.New(commandkit.Identity{Name: "example"})
				if err := commandkit.RegisterConfig(app, commandkit.ConfigSuite[struct{}]{Scopes: []commandkit.ConfigScope[struct{}]{scope}, NewContext: func() struct{} { contexts++; return struct{}{} }}); err != nil {
					t.Fatal(err)
				}
				args := []string{"config", operation}
				if operation == "explain" {
					args = append(args, "--path", "")
				}
				var out bytes.Buffer
				result := app.Execute(ctx, args, commandkit.Streams{Out: &out})
				want := 1
				if before {
					want = 0
				}
				if result.Kind != commandkit.OutcomeOperational || result.Status != 1 || !errors.Is(result.Cause, context.Canceled) || loads != want || contexts != want || out.Len() != 0 {
					t.Fatalf("result=%#v loads=%d contexts=%d out=%q", result, loads, contexts, out.String())
				}
			})
		}
	}
}

func TestAggregateCancellationRetainsCompletedValidationAndDiagnostics(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	app, _ := commandkit.New(commandkit.Identity{Name: "example"})
	calls := 0
	acquire := func(context.Context, commandkit.ConfigRequest, struct{}) (commandkit.Acquired[commandkit.ConfigView], error) {
		calls++
		if calls == 2 {
			cancel()
		}
		return commandkit.Acquired[commandkit.ConfigView]{Diagnostics: []commandkit.Diagnostic{commandkit.MessageDiagnostic(configkit.SeverityWarning, "acquired warning")}}, nil
	}
	if err := commandkit.RegisterConfig(app, commandkit.ConfigSuite[struct{}]{Scopes: []commandkit.ConfigScope[struct{}]{
		{Name: "app", Operations: []commandkit.ConfigOperation{commandkit.ConfigValidate}, Acquire: acquire},
		{Name: "promptkit", Operations: []commandkit.ConfigOperation{commandkit.ConfigValidate}, Acquire: acquire},
		{Name: "zeta", Operations: []commandkit.ConfigOperation{commandkit.ConfigValidate}, Acquire: acquire},
	}}); err != nil {
		t.Fatal(err)
	}
	var out, diagnostics bytes.Buffer
	result := app.Execute(ctx, []string{"config", "validate", "--scope", "all"}, commandkit.Streams{Out: &out, Err: &diagnostics})
	if !errors.Is(result.Cause, context.Canceled) || !result.ReportIncomplete || calls != 2 || out.String() != "app: valid\n" || strings.Count(diagnostics.String(), "acquired warning") != 2 {
		t.Fatalf("result=%#v calls=%d out=%q diagnostics=%q", result, calls, out.String(), diagnostics.String())
	}
}

func TestDefinitionInspectionCancellationBoundaries(t *testing.T) {
	for _, resource := range []string{"prompt", "profile"} {
		for _, before := range []bool{true, false} {
			t.Run(fmt.Sprintf("%s/before=%t", resource, before), func(t *testing.T) {
				ctx, cancel := context.WithCancel(context.Background())
				defer cancel()
				if before {
					cancel()
				}
				calls, contexts := 0, 0
				diagnostics := []commandkit.Diagnostic{commandkit.MessageDiagnostic(configkit.SeverityWarning, "acquired warning")}
				suite := commandkit.PromptKitSuite[struct{}]{NewContext: func() struct{} { contexts++; return struct{}{} },
					InspectPrompt: func(context.Context, commandkit.Selection, struct{}, string, string) (commandkit.Acquired[*promptkit.PromptInspection], error) {
						calls++
						cancel()
						return commandkit.Acquired[*promptkit.PromptInspection]{Value: &promptkit.PromptInspection{}, Diagnostics: diagnostics}, nil
					},
					InspectProfile: func(context.Context, commandkit.Selection, struct{}, string) (commandkit.Acquired[*promptkit.ProfileInspection], error) {
						calls++
						cancel()
						return commandkit.Acquired[*promptkit.ProfileInspection]{Value: &promptkit.ProfileInspection{}, Diagnostics: diagnostics}, nil
					},
				}
				app, _ := commandkit.New(commandkit.Identity{Name: "example"})
				if err := commandkit.RegisterPromptKit(app, suite); err != nil {
					t.Fatal(err)
				}
				var out, errs bytes.Buffer
				result := app.Execute(ctx, []string{"promptkit", "show", resource, "example"}, commandkit.Streams{Out: &out, Err: &errs})
				want := 1
				if before {
					want = 0
				}
				if result.Kind != commandkit.OutcomeOperational || !errors.Is(result.Cause, context.Canceled) || calls != want || contexts != want || out.Len() != 0 || (!before && !strings.Contains(errs.String(), "acquired warning")) {
					t.Fatalf("result=%#v calls=%d contexts=%d out=%q diagnostics=%q", result, calls, contexts, out.String(), errs.String())
				}
			})
		}
	}
}