package inbox

import (
	"os"
	"path/filepath"
	"testing"
)

func seedThreadForInboxTests(t *testing.T, dbPath, from, to string) string {
	t.Helper()

	runInboxCommand(t, "--db", dbPath, "--json", "init")

	sendOut := runInboxCommand(
		t,
		"--db", dbPath,
		"--json",
		"send",
		"--from", from,
		"--to", to,
		"--subject", "Implement feature X",
		"--summary", "Add retry policy",
	)

	var sendResp map[string]any
	mustDecodeJSON(t, sendOut, &sendResp)
	return nestedString(t, sendResp, "data", "thread", "thread_id")
}

func seedClaimedThreadForInboxTests(t *testing.T, dbPath, from, to, claimer string) string {
	t.Helper()

	threadID := seedThreadForInboxTests(t, dbPath, from, to)
	runInboxCommand(
		t,
		"--db", dbPath,
		"--json",
		"claim",
		"--agent", claimer,
		"--thread", threadID,
		"--lease-seconds", "300",
	)
	return threadID
}

func lastThreadMessageFromShow(t *testing.T, showResp map[string]any) map[string]any {
	t.Helper()

	messagesValue := nestedValue(t, showResp, "data", "messages")
	messages, ok := messagesValue.([]any)
	if !ok || len(messages) == 0 {
		t.Fatalf("expected non-empty messages, got %#v", messagesValue)
	}

	lastMessage, ok := messages[len(messages)-1].(map[string]any)
	if !ok {
		t.Fatalf("expected message object, got %#v", messages[len(messages)-1])
	}
	return lastMessage
}

func TestUpdateMovesThreadToInProgress(t *testing.T) {
	t.Parallel()

	dbPath := filepath.Join(t.TempDir(), "coord.db")
	threadID := seedClaimedThreadForInboxTests(t, dbPath, "leader", "worker-a", "worker-a")

	updateOut := runInboxCommand(
		t,
		"--db", dbPath,
		"--json",
		"update",
		"--agent", "worker-a",
		"--thread", threadID,
		"--status", "in_progress",
		"--summary", "Implementation started",
		"--body", "Scanning current HTTP client usage.",
	)

	var updateResp map[string]any
	mustDecodeJSON(t, updateOut, &updateResp)
	if status := nestedString(t, updateResp, "data", "thread", "status"); status != "in_progress" {
		t.Fatalf("expected in_progress thread status, got %q", status)
	}
	if kind := nestedString(t, updateResp, "data", "message", "kind"); kind != "progress" {
		t.Fatalf("expected progress message kind, got %q", kind)
	}
	if toAgent := nestedString(t, updateResp, "data", "message", "to_agent"); toAgent != "leader" {
		t.Fatalf("expected message to_agent leader, got %q", toAgent)
	}
}

func TestUpdateMovesThreadToBlockedWithPayload(t *testing.T) {
	t.Parallel()

	dbPath := filepath.Join(t.TempDir(), "coord.db")
	threadID := seedClaimedThreadForInboxTests(t, dbPath, "leader", "worker-a", "worker-a")

	updateOut := runInboxCommand(
		t,
		"--db", dbPath,
		"--json",
		"update",
		"--agent", "worker-a",
		"--thread", threadID,
		"--status", "blocked",
		"--summary", "Need timeout decision",
		"--payload-json", `{"question":"Should retries apply to read timeouts?"}`,
	)

	var updateResp map[string]any
	mustDecodeJSON(t, updateOut, &updateResp)
	if status := nestedString(t, updateResp, "data", "thread", "status"); status != "blocked" {
		t.Fatalf("expected blocked thread status, got %q", status)
	}
	if kind := nestedString(t, updateResp, "data", "message", "kind"); kind != "question" {
		t.Fatalf("expected question message kind, got %q", kind)
	}
	payload, ok := nestedValue(t, updateResp, "data", "message", "payload_json").(map[string]any)
	if !ok {
		t.Fatalf("expected payload_json object, got %#v", nestedValue(t, updateResp, "data", "message", "payload_json"))
	}
	if got := payload["question"]; got != "Should retries apply to read timeouts?" {
		t.Fatalf("expected payload question, got %#v", got)
	}
}

func TestUpdateAcceptsBodyFileAndArtifact(t *testing.T) {
	t.Parallel()

	tempDir := t.TempDir()
	dbPath := filepath.Join(tempDir, "coord.db")
	progressPath := filepath.Join(tempDir, "progress.md")
	body := "Progress update from file."
	if err := os.WriteFile(progressPath, []byte(body), 0o644); err != nil {
		t.Fatalf("write progress file: %v", err)
	}

	threadID := seedClaimedThreadForInboxTests(t, dbPath, "leader", "worker-a", "worker-a")

	runInboxCommand(
		t,
		"--db", dbPath,
		"--json",
		"update",
		"--agent", "worker-a",
		"--thread", threadID,
		"--status", "in_progress",
		"--summary", "Implementation started",
		"--body-file", progressPath,
		"--artifact", progressPath,
		"--artifact-kind", "note",
	)

	showOut := runInboxCommand(
		t,
		"--db", dbPath,
		"--json",
		"show",
		"--thread", threadID,
	)
	var showResp map[string]any
	mustDecodeJSON(t, showOut, &showResp)
	lastMessage := lastThreadMessageFromShow(t, showResp)

	if gotBody, _ := lastMessage["body"].(string); gotBody != body {
		t.Fatalf("expected body %q, got %#v", body, lastMessage["body"])
	}
	artifacts, ok := lastMessage["artifacts"].([]any)
	if !ok || len(artifacts) != 1 {
		t.Fatalf("expected one artifact, got %#v", lastMessage["artifacts"])
	}
	artifact, ok := artifacts[0].(map[string]any)
	if !ok {
		t.Fatalf("expected artifact object, got %#v", artifacts[0])
	}
	if gotPath, _ := artifact["path"].(string); gotPath != progressPath {
		t.Fatalf("expected artifact path %q, got %#v", progressPath, artifact["path"])
	}
	if gotKind, _ := artifact["kind"].(string); gotKind != "note" {
		t.Fatalf("expected artifact kind note, got %#v", artifact["kind"])
	}
}

func TestUpdateRejectsInvalidPayloadJSON(t *testing.T) {
	t.Parallel()

	dbPath := filepath.Join(t.TempDir(), "coord.db")
	threadID := seedClaimedThreadForInboxTests(t, dbPath, "leader", "worker-a", "worker-a")

	stdout, _, exitCode := executeInboxCommand(
		"--db", dbPath,
		"--json",
		"update",
		"--agent", "worker-a",
		"--thread", threadID,
		"--status", "blocked",
		"--summary", "Need timeout decision",
		"--payload-json", "not-json",
	)
	if exitCode != 30 {
		t.Fatalf("expected exit code 30, got %d with output %s", exitCode, stdout)
	}
	assertErrorJSON(t, stdout, "invalid_input")
}

func TestUpdateRejectsNonOwner(t *testing.T) {
	t.Parallel()

	dbPath := filepath.Join(t.TempDir(), "coord.db")
	threadID := seedClaimedThreadForInboxTests(t, dbPath, "leader", "worker-a", "worker-a")

	stdout, _, exitCode := executeInboxCommand(
		"--db", dbPath,
		"--json",
		"update",
		"--agent", "worker-b",
		"--thread", threadID,
		"--status", "in_progress",
		"--summary", "Implementation started",
	)
	if exitCode != 20 {
		t.Fatalf("expected exit code 20, got %d with output %s", exitCode, stdout)
	}
	assertErrorJSON(t, stdout, "lease_conflict")
}