package main

import (
	"context"
	"strings"
	"testing"
	"time"

	"github.com/novox/mesh-controller/internal/inventory"
)

// **Every verb that repairs by hand takes a required why** (novox/hq to-be 45 §7): refused before
// anything is done, through the seat, through `command`, and at a shell where nothing automated runs
// the verb.
func TestARepairByHandWithoutAReasonIsRefused(t *testing.T) {
	for _, c := range []struct {
		verb string
		args map[string]any
	}{
		{"push", map[string]any{"node": "anchor"}},
		{"push", map[string]any{}},
		{"plans", map[string]any{"close": "plan-1"}},
		{"plans", map[string]any{"stop": "plan-1"}},
		{"hand-act", map[string]any{"what": "restarted the proxy", "cause": "proxy-stuck"}},
	} {
		argv, err := argvFor(c.verb, c.args)
		if c.verb == "plans" && err == nil {
			// The seat composes the command line; the command refuses it, before opening anything.
			err = plansCommand(context.Background(), argv[1:])
		}
		if err == nil || !strings.Contains(err.Error(), "why") {
			t.Errorf("%s %v was not refused for want of why: %v %v", c.verb, c.args, argv, err)
		}
	}
	for _, args := range [][]string{{"EVENTS", "controller"}} {
		if err := consumerReset(context.Background(), args); err == nil || !strings.Contains(err.Error(), "--why") {
			t.Errorf("consumer-reset without why: %v", err)
		}
	}
	if err := handActCommand(context.Background(), []string{"record", "restarted the proxy", "--cause", "x"}); err == nil ||
		!strings.Contains(err.Error(), "--why") {
		t.Errorf("hand-act record without why: %v", err)
	}
	if err := handActCommand(context.Background(), []string{"record", "restarted the proxy", "--why", "it hung"}); err == nil ||
		!strings.Contains(err.Error(), "--cause") {
		t.Errorf("hand-act record without a cause: %v", err)
	}
}

// With a reason, the seat passes it to the command, and a verb that only reads is not held to one.
func TestARepairByHandCarriesItsReason(t *testing.T) {
	for _, c := range []struct {
		verb string
		args map[string]any
		want string
	}{
		{"push", map[string]any{"node": "anchor", "why": "stuck", "cause": "sent-not-reported"},
			"push anchor --wait 0s --why stuck --cause sent-not-reported"},
		{"plans", map[string]any{"close": "plan-1", "why": "the report will not come"},
			"plans close plan-1 --why the report will not come"},
		{"plans", map[string]any{"retry": "plan-1"}, "plans retry plan-1"},
		{"hand-act", map[string]any{"what": "restarted", "why": "hung", "cause": "proxy", "condition": "machine.a.silent"},
			"hand-act record restarted --why hung --cause proxy --condition machine.a.silent"},
		{"command", map[string]any{"command": "plans plan-1"}, "plans plan-1"},
	} {
		argv, err := argvFor(c.verb, c.args)
		if err != nil || strings.Join(argv, " ") != c.want {
			t.Errorf("%s %v: %v %v, want %q", c.verb, c.args, argv, err, c.want)
		}
	}
}

// The summary of durations says, per kind and subject, what a bound would be set from.
func TestDurationsAreSummarisedPerSubject(t *testing.T) {
	var ds []inventory.Duration
	for i := 1; i <= 10; i++ {
		ds = append(ds, inventory.Duration{Kind: inventory.DurationApply, Subject: "anchor",
			Took: time.Duration(i) * time.Second})
	}
	ds = append(ds, inventory.Duration{Kind: inventory.DurationHeartbeatGap, Subject: "anchor", Took: time.Minute})
	got := summarise(ds)
	if len(got) != 2 || got[0].Kind != inventory.DurationApply || got[0].Count != 10 ||
		got[0].Max != "10s" || got[0].Median != "5s" || got[0].P90 != "9s" {
		t.Fatalf("%+v", got)
	}
	if !strings.Contains(got[1].Suggests, "3m0s") {
		t.Fatalf("a minute between words suggests %q", got[1].Suggests)
	}
}

// **A drill has its own verb** — `hand-act drill`, the seat's `drill` — and `hand-act record` refuses
// the cause, so a repair cannot pass for a drill by the word it gives.
func TestADrillIsRecordedThroughItsOwnVerb(t *testing.T) {
	err := handActCommand(context.Background(), []string{"record", "stopped searxng", "--why", "a test", "--cause", "drill"})
	if err == nil || !strings.Contains(err.Error(), "hand-act drill") {
		t.Errorf("hand-act record --cause drill was not sent to the drill verb: %v", err)
	}
	if err := handActCommand(context.Background(), []string{"drill", "stopped searxng"}); err == nil ||
		!strings.Contains(err.Error(), "--why") {
		t.Errorf("a drill without what it tests: %v", err)
	}
	if err := handActCommand(context.Background(), []string{"drill", "--why", "a test"}); err == nil ||
		!strings.Contains(err.Error(), "hand-act drill <what") {
		t.Errorf("a drill without what was done: %v", err)
	}
	argv, err := argvFor("drill", map[string]any{"what": "stopped searxng", "why": "ADR 0240 phase A",
		"condition": "machine.ace.module.searxng.unhealthy"})
	if want := "hand-act drill stopped searxng --why ADR 0240 phase A --condition machine.ace.module.searxng.unhealthy"; err != nil ||
		strings.Join(argv, " ") != want {
		t.Errorf("the seat's drill: %v %v, want %q", argv, err, want)
	}
	if _, err := argvFor("drill", map[string]any{"what": "stopped searxng"}); err == nil {
		t.Error("the seat's drill without why was not refused")
	}
	if repairingCommand([]string{"hand-act", "drill", "x"}) != "hand-act drill" {
		t.Error("a drill through `command` is not held to why")
	}
}