package tui

import (
	"errors"
	"strings"
	"testing"

	tea "github.com/charmbracelet/bubbletea"

	"proxyctl/internal/app"
	"proxyctl/internal/target"
)

type targetModule struct {
	snapshot app.Snapshot
	result   app.Result
	intents  []app.Intent
}

func (m *targetModule) Snapshot() app.Snapshot { return m.snapshot }
func (m *targetModule) Dispatch(intent app.Intent) app.Result {
	m.intents = append(m.intents, intent)
	m.snapshot = m.result.Snapshot
	return m.result
}

func TestTargetPanelShowsOnlyAvailableTargetsAndAppliesAsynchronously(t *testing.T) {
	module := &targetModule{snapshot: app.Snapshot{ActiveProfile: "office", Targets: []app.TargetSnapshot{
		{ID: "shell", Description: target.Description{Name: "Shell", Summary: "Exports for Bash/Zsh"}, Available: true, State: target.External, Evidence: "existing proxy"},
		{ID: "apt", Description: target.Description{Name: "APT"}, Available: false},
	}}}
	module.result = app.Result{Snapshot: app.Snapshot{ActiveProfile: "office", Targets: []app.TargetSnapshot{{ID: "shell", Description: target.Description{Name: "Shell", Summary: "Exports for Bash/Zsh"}, Available: true, State: target.Enabled, Evidence: "matches"}}}, Notice: "Shell Target is now Enabled"}
	model := NewModel(module)
	view := model.View()
	if !strings.Contains(view, "Shell") || strings.Contains(view, "] APT") || !strings.Contains(view, "Unavailable APT") || !strings.Contains(view, "Exports for Bash/Zsh") {
		t.Fatalf("Target panel:\n%s", view)
	}

	updated, command := model.Update(tea.KeyMsg{Type: tea.KeySpace})
	model = updated.(Model)
	if command == nil || !strings.Contains(model.View(), "Applying") || len(module.intents) != 0 {
		t.Fatalf("operation did not expose applying state before effect:\n%s", model.View())
	}
	message := command()
	updated, _ = model.Update(message)
	model = updated.(Model)
	if len(module.intents) != 1 || module.intents[0].Kind != app.SetTargetDesired || !module.intents[0].Enabled || !strings.Contains(model.View(), "Enabled") {
		t.Fatalf("completed toggle = %#v\n%s", module.intents, model.View())
	}
}

func TestTargetRestartConfirmationCancelsWithoutConfirmedMutation(t *testing.T) {
	initial := app.Snapshot{ActiveProfile: "office", Targets: []app.TargetSnapshot{{ID: "docker-daemon", Description: target.Description{Name: "Docker daemon"}, Available: true, State: target.Disabled}}}
	module := &targetModule{snapshot: initial, result: app.Result{Snapshot: initial, Confirmation: "Docker will restart immediately and may disrupt running work."}}
	model := NewModel(module)
	updated, command := model.Update(tea.KeyMsg{Type: tea.KeySpace})
	model = updated.(Model)
	updated, _ = model.Update(command())
	model = updated.(Model)
	if !strings.Contains(model.View(), "restart immediately") || len(module.intents) != 1 || module.intents[0].Confirm {
		t.Fatalf("warning = intents %#v\n%s", module.intents, model.View())
	}
	updated, command = model.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'n'}})
	model = updated.(Model)
	if command != nil || len(module.intents) != 1 || strings.Contains(model.View(), "restart immediately") {
		t.Fatalf("cancel mutated = intents %#v\n%s", module.intents, model.View())
	}

	updated, command = model.Update(tea.KeyMsg{Type: tea.KeySpace})
	model = updated.(Model)
	updated, _ = model.Update(command())
	model = updated.(Model)
	module.result = app.Result{
		Snapshot: app.Snapshot{ActiveProfile: "office", Targets: []app.TargetSnapshot{{ID: "docker-daemon", Description: target.Description{Name: "Docker daemon"}, Available: true, State: target.Enabled}}},
		Notice:   "Docker daemon Target is now Enabled",
	}
	updated, command = model.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'y'}})
	model = updated.(Model)
	if command == nil {
		t.Fatal("confirmation did not start operation")
	}
	_ = command()
	if len(module.intents) != 3 || !module.intents[2].Confirm {
		t.Fatalf("confirmed intents = %#v", module.intents)
	}
}

func TestUnavailableShellIsOutsideMainListWithDetectionExplanation(t *testing.T) {
	module := &targetModule{snapshot: app.Snapshot{Targets: []app.TargetSnapshot{
		{ID: "shell", Description: target.Description{Name: "Shell"}, Available: false, AvailabilityEvidence: "Shell Target requires Bash or Zsh; neither was detected"},
	}}}
	view := NewModel(module).View()
	if strings.Contains(view, "[Disabled ] Shell") || !strings.Contains(view, "Unavailable Shell") || !strings.Contains(view, "requires Bash or Zsh") {
		t.Fatalf("unavailable Shell explanation:\n%s", view)
	}
}

func TestTargetFailurePreservesTruthfulStateAndRendersRedactedError(t *testing.T) {
	initial := app.Snapshot{ActiveProfile: "office", Targets: []app.TargetSnapshot{{ID: "shell", Description: target.Description{Name: "Shell"}, Available: true, State: target.Enabled}}}
	module := &targetModule{snapshot: initial, result: app.Result{Snapshot: initial, Err: errors.New("permission denied for alice:REDACTED@proxy")}}
	model := NewModel(module)
	updated, command := model.Update(tea.KeyMsg{Type: tea.KeySpace})
	model = updated.(Model)
	updated, _ = model.Update(command())
	model = updated.(Model)
	view := model.View()
	if !strings.Contains(view, "Enabled") || !strings.Contains(view, "\x1b[31mError:") || !strings.Contains(view, "REDACTED") {
		t.Fatalf("failed operation rendering:\n%s", view)
	}
}