package app

// PreviewFrame renders a single static frame for a named UI state at the given
// terminal size. Used by cmd/preview to screenshot the look without a live
// server. Not part of the runtime path.
func PreviewFrame(kind string, w, h int) string {
	m := NewModel(nil)
	m.width, m.height = w, h
	m.theme = NewTheme(SoftBlue)

	switch kind {
	case "idle-empty":
		m.connected = false

	case "idle":
		m.connected = true
		m.currentModel = "llama-cpp:default"
		m.sessions = sampleSessions()
		m.workflows = sampleWorkflows()
		m.bgUpdates = 3
		m.selectedID = "04a546aa"

	case "workflows":
		m.connected = true
		m.currentModel = "llama-cpp:default"
		m.sessions = sampleSessions()
		m.workflows = sampleWorkflows()
		m.selectedID = "04a546aa"
		m.wfVisible = true
		m.wfIndex = 1

	case "session", "insert":
		m.connected = true
		m.currentModel = "llama-cpp:default"
		m.sessions = sampleSessions()
		m.selectedID = "04a546aa"
		m.sessionEntered = true
		m.routerConnected = true
		m.routerMessages["04a546aa"] = []RouterEntry{
			{"user", "write a healthcheck script for the api"},
			{"router", "I'll create a script that pings /health and checks the status code, then writes the results to a timestamped file."},
			{"tool", "--- a/healthcheck.sh\n+++ b/healthcheck.sh\n@@ -0,0 +1,4 @@\n+#!/usr/bin/env bash\n+curl -sf http://localhost:8080/health\n+echo \"ok $(date)\"\n"},
		}
		if s := m.session("04a546aa"); s != nil {
			s.CurrentStage = "write_script"
			s.Events = sampleEvents()
			s.Active = true
			s.ToolsByStage = sampleManifest()
		}
		if kind == "insert" {
			m.editMode = ModeInsert
			m.inputBuffer = "now add a retry with backoff"
			m.inputCursor = len(m.inputBuffer)
		}

	case "tools":
		m.connected = true
		m.currentModel = "llama-cpp:default"
		m.sessions = sampleSessions()
		m.selectedID = "04a546aa"
		m.sessionEntered = true
		if s := m.session("04a546aa"); s != nil {
			s.CurrentStage = "write_script"
			s.ToolsByStage = sampleManifest()
		}
		m.overlay = OverlayToolPalette

	case "approval":
		m.connected = true
		m.currentModel = "llama-cpp:default"
		m.sessions = sampleSessions()
		m.selectedID = "04a546aa"
		m.sessionEntered = true
		if s := m.session("04a546aa"); s != nil {
			s.CurrentStage = "write_script"
			s.Events = sampleEvents()
			s.Pending = &Approval{
				RequestID: "req-1", SessionID: "04a546aa", Tier: "T3", Risk: "MEDIUM",
				ToolName: "file_write",
				Preview:  "--- a/healthcheck.sh\n+++ b/healthcheck.sh\n@@ -0,0 +1,4 @@\n+#!/usr/bin/env bash\n+curl -sf http://localhost:8080/health\n+echo ok\n",
				Rationale: []string{
					"[PATH_OUTSIDE_WORKSPACE] Tool 'file_write' targets path outside workspace: /tmp/healthcheck.sh",
				},
			}
		}

	case "approval-shell":
		m.connected = true
		m.currentModel = "llama-cpp:default"
		m.sessions = sampleSessions()
		m.selectedID = "04a546aa"
		m.sessionEntered = true
		if s := m.session("04a546aa"); s != nil {
			s.CurrentStage = "execute_script"
			s.Events = sampleEvents()
			s.Pending = &Approval{
				RequestID: "req-2", SessionID: "04a546aa", Tier: "T2", Risk: "MEDIUM",
				ToolName: "shell",
				Preview:  `{"argv":["bash","scripts/healthcheck.sh"]}`,
				Rationale: []string{
					"[INTERPRETER_EXECUTION] Tool 'shell' invokes interpreter 'bash'",
				},
			}
		}

	case "diff":
		m.connected = true
		m.currentModel = "llama-cpp:default"
		m.sessions = sampleSessions()
		m.selectedID = "04a546aa"
		m.sessionEntered = true
		m.routerMessages["04a546aa"] = []RouterEntry{
			{"tool", "--- a/healthcheck.sh\n+++ b/healthcheck.sh\n@@ -1,2 +1,6 @@\n #!/usr/bin/env bash\n-echo hi\n+curl -sf http://localhost:8080/health\n+if [ $? -ne 0 ]; then\n+  echo \"unhealthy\" >&2\n+  exit 1\n+fi\n+echo \"ok $(date)\"\n"},
		}
		m.overlay = OverlayDiff

	case "palette":
		m.connected = true
		m.currentModel = "llama-cpp:default"
		m.sessions = sampleSessions()
		m.selectedID = "04a546aa"
		m.overlay = OverlayPalette
		m.paletteFilter = "to"
	}
	return m.View()
}

func sampleWorkflows() []Workflow {
	return []Workflow{
		{ID: "healthcheck", Description: "ping endpoints and report status"},
		{ID: "refactor", Description: "multi-stage code refactor with review"},
		{ID: "triage", Description: "classify and route incoming issues"},
	}
}

func sampleManifest() map[string][]ManifestTool {
	return map[string][]ManifestTool{
		"plan":         {{"read_file", 0}, {"list_dir", 0}},
		"write_script": {{"file_write", 3}, {"shell_exec", 4}, {"read_file", 0}},
		"verify":       {{"shell_exec", 4}, {"http_get", 1}},
	}
}

func sampleSessions() []Session {
	return []Session{
		{ID: "04a546aa", Status: "FAILED", WorkflowID: "healthcheck", Name: "healthcheck", CurrentStage: "write_script", LastEventAt: 1748000000000},
		{ID: "0d7097bb", Status: "COMPLETED", WorkflowID: "healthcheck", Name: "healthcheck", LastEventAt: 1748000000000},
		{ID: "1dae17cc", Status: "CHAT", WorkflowID: "chat", Name: "chat", LastEventAt: 1748000000000},
		{ID: "338f09dd", Status: "FAILED", WorkflowID: "healthcheck", Name: "healthcheck", CurrentStage: "write_script", LastEventAt: 1748000000000},
		{ID: "3f362dee", Status: "CHAT", WorkflowID: "chat", Name: "chat", LastEventAt: 1748000000000},
		{ID: "92f6c3ff", Status: "CHAT", WorkflowID: "chat", Name: "chat", LastEventAt: 1748000000000},
		{ID: "9a7682gg", Status: "COMPLETED", WorkflowID: "healthcheck", Name: "healthcheck", LastEventAt: 1748000000000},
	}
}

func sampleEvents() []EventEntry {
	return []EventEntry{
		{"13:42:36", "InferenceStarted", "write_script"},
		{"13:43:00", "InferenceCompleted", "write_script"},
		{"13:43:00", "ToolStarted", "file_write"},
		{"13:43:00", "SessionPaused", "APPROVAL_PENDING"},
		{"13:44:10", "ToolCompleted", "file_write"},
		{"13:44:10", "InferenceStarted", "write_script"},
		{"13:44:10", "SessionFailed", "CANCELLED"},
	}
}