package daemon

import (
	"strings"
	"testing"
)

// TestBuildQuickCreatePromptRules locks in the rules that govern how the
// quick-create agent is allowed to translate raw user input into the issue
// description body. Each substring corresponds to a concrete failure mode
// observed in production output:
//   - meta-instructions ("create an issue", "cc @X") leaking into the body
//   - the Context section being misused as an apology log when no external
//     references were actually fetched
//   - hard-line rules being silently dropped on prompt rewrites
func TestBuildQuickCreatePromptRules(t *testing.T) {
	out := buildQuickCreatePrompt(Task{QuickCreatePrompt: "fix the login button color"})

	mustContain := []string{
		// high-fidelity invariant
		"Faithfully restate what the user wants",
		"Preserve specific names, identifiers, file paths",
		// strip non-spec material: verbal routing wrappers + conversational fillers
		"verbal routing wrappers about creating the issue",
		"pure conversational fillers",
		// cc routing must survive: mention link stays in description so the
		// auto-subscribe path fires (multica issue create has no --subscriber flag)
		"CC exception",
		"auto-subscribes members",
		// context section is conditional and must not be an apology log
		"include ONLY when the input cited external resources",
		"never use it as an apology log",
		// output/reporting must be workspace-prefix agnostic. Workspaces can
		// use custom issue prefixes, so a successful issue creation should
		// not look failed merely because the identifier does not match one
		// fixed prefix.
		"multica issue create --output json",
		"JSON response",
		"identifier",
		"Do not scrape human output",
		"do not assume any workspace issue prefix",
		"Created <identifier-or-id>: <title>",
		// hard rules
		"never invent requirements",
		"never reduce multi-sentence input",
	}
	for _, s := range mustContain {
		if !strings.Contains(out, s) {
			t.Errorf("buildQuickCreatePrompt output missing required rule: %q", s)
		}
	}
}

// TestBuildQuickCreatePromptAssigneeIncludesSquads locks in the MUL-2165
// fix: the assignee-resolution rules must tell the agent to consult the
// squad list alongside members and agents. Before this, a quick-create
// input like "assign to <SquadName>" silently fell through to
// "Unrecognized assignee" because squads were never queried.
func TestBuildQuickCreatePromptAssigneeIncludesSquads(t *testing.T) {
	out := buildQuickCreatePrompt(Task{QuickCreatePrompt: "fix the login button color"})
	mustContain := []string{
		"multica squad list",
		"Squads are first-class assignees",
		"Treat bare @-routing as an assignee directive",
		"让 @独立团 review 这个 PR",
		"pass the squad's `id` as `--assignee-id`",
	}
	for _, s := range mustContain {
		if !strings.Contains(out, s) {
			t.Errorf("buildQuickCreatePrompt assignee block missing %q\n--- output ---\n%s", s, out)
		}
	}
}

// TestBuildQuickCreatePromptSquadDefaultsToSquad locks in the MUL-2203
// fix: when the picker was a squad, the task runs on the squad's leader
// agent, but the default assignee for issues created by this run must
// point at the SQUAD's UUID — not the leader agent's UUID. The previous
// "default to YOURSELF" instruction made squad-created issues land under
// the leader, hiding them from the squad's delegation flow.
func TestBuildQuickCreatePromptSquadDefaultsToSquad(t *testing.T) {
	const (
		squadID   = "aaaa1111-2222-3333-4444-555555555555"
		squadName = "独立团"
		leaderID  = "bbbb1111-2222-3333-4444-666666666666"
	)
	out := buildQuickCreatePrompt(Task{
		QuickCreatePrompt: "fix the login button color",
		Agent:             &AgentData{ID: leaderID, Name: "leader-agent"},
		SquadID:           squadID,
		SquadName:         squadName,
	})

	// The default-assignee instruction must point at the squad UUID.
	if !strings.Contains(out, "--assignee-id \""+squadID+"\"") {
		t.Errorf("buildQuickCreatePrompt with SquadID must default to the squad's UUID, got:\n%s", out)
	}
	// And it must NOT tell the agent to default to itself (the leader).
	if strings.Contains(out, "--assignee-id \""+leaderID+"\"") {
		t.Errorf("buildQuickCreatePrompt with SquadID must NOT default to the leader agent's UUID, got:\n%s", out)
	}
	// The squad name should appear in the instruction so the agent has
	// human-readable context for the routing decision.
	if !strings.Contains(out, squadName) {
		t.Errorf("buildQuickCreatePrompt with SquadID should mention the squad name %q, got:\n%s", squadName, out)
	}
	// And the prompt must explicitly call out the squad-vs-leader rule
	// so the agent does not silently regress to "default to YOURSELF".
	mustContain := []string{
		"picker SQUAD",
		"running on the squad's behalf",
		"do not assign it to your own agent UUID",
	}
	for _, s := range mustContain {
		if !strings.Contains(out, s) {
			t.Errorf("buildQuickCreatePrompt with SquadID missing %q\n--- output ---\n%s", s, out)
		}
	}
}

// TestBuildQuickCreatePromptProjectPinning verifies that when the user
// pins a project in the quick-create modal, the prompt instructs the agent
// to pass `--project <uuid>` exactly. Without this, the agent would re-read
// the workspace default and silently drop the user's selection — the same
// "I have to retype 'in project X' every time" failure mode the modal
// addition was meant to fix.
func TestBuildQuickCreatePromptProjectPinning(t *testing.T) {
	const projectID = "11111111-2222-3333-4444-555555555555"
	out := buildQuickCreatePrompt(Task{
		QuickCreatePrompt: "fix the login button color",
		ProjectID:         projectID,
		ProjectTitle:      "Web App",
	})
	mustContain := []string{
		"--project \"" + projectID + "\"",
		"Web App",
		"modal selection is authoritative",
	}
	for _, s := range mustContain {
		if !strings.Contains(out, s) {
			t.Errorf("buildQuickCreatePrompt with project missing %q\n--- output ---\n%s", s, out)
		}
	}

	// Without a project, the prompt must keep the legacy "omit" instruction
	// so the agent doesn't accidentally start passing --project on plain
	// quick-create runs.
	plain := buildQuickCreatePrompt(Task{QuickCreatePrompt: "fix the login button color"})
	if !strings.Contains(plain, "**project**: omit") {
		t.Errorf("buildQuickCreatePrompt without project must keep the omit instruction, got:\n%s", plain)
	}
	if strings.Contains(plain, "--project") {
		t.Errorf("buildQuickCreatePrompt without project must NOT mention --project, got:\n%s", plain)
	}
}

// TestBuildPromptSquadLeaderNoActionForMemberTrigger verifies that the
// squad leader no_action prohibition is injected in the per-turn prompt
// regardless of whether the triggering comment was posted by an agent or
// a member. This was the root cause of the "LGTM is a pure acknowledgment
// — no reply needed. Exiting silently." noise comment: the prohibition
// only fired for agent-triggered comments, so member-triggered ones
// (like "LGTM") bypassed it.
func TestBuildPromptSquadLeaderNoActionForMemberTrigger(t *testing.T) {
	task := Task{
		IssueID:               "issue-123",
		TriggerCommentID:      "comment-456",
		TriggerCommentContent: "LGTM",
		TriggerAuthorType:     "member",
		TriggerAuthorName:     "Bohan",
		Agent: &AgentData{
			Instructions: "Some instructions\n\n## Squad Operating Protocol\n\nYou are the LEADER...",
		},
	}
	out := BuildPrompt(task, "claude")
	if !strings.Contains(out, "Squad leader no_action rule") {
		t.Errorf("buildCommentPrompt must inject squad leader no_action rule for member-triggered comments, got:\n%s", out)
	}
	if !strings.Contains(out, "DO NOT post any comment") {
		t.Errorf("buildCommentPrompt must contain DO NOT post prohibition for member-triggered squad leader, got:\n%s", out)
	}
}

// TestBuildPromptSquadLeaderNoActionForAgentTrigger verifies the rule also
// fires for agent-triggered comments (the original path that already worked).
func TestBuildPromptSquadLeaderNoActionForAgentTrigger(t *testing.T) {
	task := Task{
		IssueID:               "issue-123",
		TriggerCommentID:      "comment-456",
		TriggerCommentContent: "Deploy complete.",
		TriggerAuthorType:     "agent",
		TriggerAuthorName:     "deploy-boy",
		Agent: &AgentData{
			Instructions: "Some instructions\n\n## Squad Operating Protocol\n\nYou are the LEADER...",
		},
	}
	out := BuildPrompt(task, "claude")
	if !strings.Contains(out, "Squad leader no_action rule") {
		t.Errorf("buildCommentPrompt must inject squad leader no_action rule for agent-triggered comments, got:\n%s", out)
	}
}

// TestBuildPromptCommentTriggerPromotesThreadReads pins MUL-2387 + MUL-2421:
// the per-turn prompt for a comment-triggered task must default the trigger
// thread read to `--thread <id> --tail 30` (so long threads don't dump
// hundreds of replies into the agent's context) and explain reply-cursor
// pagination for older replies. --recent N stays as the cross-thread
// fallback. Locking this in test stops the guidance from decaying back to
// either the legacy full-flat-dump or the unbounded `--thread` recipe.
func TestBuildPromptCommentTriggerPromotesThreadReads(t *testing.T) {
	const (
		issueID   = "issue-thread-1"
		triggerID = "trigger-comment-1"
	)
	task := Task{
		IssueID:               issueID,
		TriggerCommentID:      triggerID,
		TriggerCommentContent: "anything",
		TriggerAuthorType:     "member",
		TriggerAuthorName:     "Bohan",
	}
	out := BuildPrompt(task, "claude")

	mustContain := []string{
		// Thread-first read pinned by trigger comment id, capped via --tail 30.
		"--thread " + triggerID,
		"--tail 30",
		"`multica issue comment list " + issueID + " --thread " + triggerID + " --tail 30 --output json`",
		// Reply cursor walks older replies inside the same thread.
		"Next reply cursor:",
		"--before-id <reply-id>",
		// --recent stays as the cross-thread background fallback.
		"--recent 20 --output json",
		// Cursor walks via the stderr line the CLI emits, not invented flags.
		"Next thread cursor",
		"--before",
		"--before-id",
		// --since is preserved as an additional, combinable knob (now scoped
		// to the post-MUL-2421 mode names).
		"--since",
		"may combine with `--thread --tail` or `--recent`",
		// Discourage the unfiltered full dump on long-running issues.
		"Avoid the unfiltered",
		"wastes context",
	}
	for _, s := range mustContain {
		if !strings.Contains(out, s) {
			t.Errorf("buildCommentPrompt missing thread-first guidance %q\n--- output ---\n%s", s, out)
		}
	}

	// The old "dump everything via --output json alone" prose is exactly the
	// pattern this PR is replacing — guard against the legacy phrasing
	// sneaking back in.
	if strings.Contains(out, "returns all comments for the issue (server caps at 2000)") {
		t.Errorf("buildCommentPrompt still carries the legacy full-dump phrasing")
	}
	// The pre-MUL-2421 unbounded `--thread` recipe (no --tail) is also a
	// regression target: it dumps the entire thread on long threads, which
	// is exactly what --tail 30 is meant to bound.
	if strings.Contains(out, "--thread "+triggerID+" --output json") {
		t.Errorf("buildCommentPrompt regressed to unbounded --thread recipe (no --tail) — long threads will overflow context\n--- output ---\n%s", out)
	}
}

// TestBuildPromptDefaultMentionsRecent pins that the catch-all fallback
// prompt (no trigger comment, no chat, no autopilot, no quick-create) also
// teaches the agent about --recent as the long-issue-friendly alternative
// to the flat dump, even though it cannot anchor a --thread without a
// trigger comment id.
func TestBuildPromptDefaultMentionsRecent(t *testing.T) {
	out := BuildPrompt(Task{IssueID: "issue-default-1"}, "claude")
	for _, s := range []string{
		"--recent 20 --output json",
		"Next thread cursor:",
		"--since",
	} {
		if !strings.Contains(out, s) {
			t.Errorf("default BuildPrompt missing %q\n--- output ---\n%s", s, out)
		}
	}
	// And the default path must NOT inject a --thread example, because there
	// is no trigger comment id to anchor on.
	if strings.Contains(out, "--thread") {
		t.Errorf("default BuildPrompt should NOT mention --thread (no trigger comment to anchor on)\n--- output ---\n%s", out)
	}
	// The legacy "If you need comment history" soft phrasing conflicts with
	// the assignment-trigger runtime workflow, which treats reading comments
	// as mandatory. Guard against it sneaking back in.
	if strings.Contains(out, "If you need comment history") {
		t.Errorf("default BuildPrompt still carries the legacy 'If you need' soft phrasing that conflicts with the mandatory workflow\n--- output ---\n%s", out)
	}
}

// TestBuildPromptNonSquadLeaderNoRule verifies that non-squad-leader agents
// do NOT get the squad leader no_action rule injected.
func TestBuildPromptNonSquadLeaderNoRule(t *testing.T) {
	task := Task{
		IssueID:               "issue-123",
		TriggerCommentID:      "comment-456",
		TriggerCommentContent: "LGTM",
		TriggerAuthorType:     "member",
		TriggerAuthorName:     "Bohan",
		Agent: &AgentData{
			Instructions: "Some instructions without the squad marker",
		},
	}
	out := BuildPrompt(task, "claude")
	if strings.Contains(out, "Squad leader no_action rule") {
		t.Errorf("buildCommentPrompt must NOT inject squad leader no_action rule for non-squad-leader agents, got:\n%s", out)
	}
}