package main

import (
	"context"
	"encoding/json"
	"fmt"
	"os"
	"regexp"
	"strings"
	"testing"
	"time"

	"git.novox.be/novox/mesh-catalog/modules/mesh-build-go/buildstep"
	sdkstep "git.novox.be/novox/mesh-delivery/sdk/buildstep"
)

const askCommit = "0123456789abcdef0123456789abcdef01234567"

func fakeSteps(calls *[]string) []StepTool {
	answer := func(name string, out any) StepTool {
		return StepTool{Name: name, Run: func(ctx context.Context, args map[string]any) (any, error) {
			*calls = append(*calls, name)
			return out, nil
		}}
	}
	return []StepTool{
		answer("build_node_fetch", map[string]any{"workspace": "ws1", "modules": []string{"modules/gitea"}}),
		answer("build_node_build", map[string]any{"digest": "sha256:bb", "reference": "artifact-store://gitea/code@sha256:bb"}),
		answer("build_node_test", map[string]any{"passed": true}),
	}
}

func nodeAsk(kind string) sdkstep.StepAsk {
	a := sdkstep.StepAsk{ID: sdkstep.NewID(), Kind: kind, Language: sdkstep.AskNode, Asker: "mesh-delivery-checker", At: time.Now()}
	fetch := sdkstep.Fetch{Repository: "novox/mesh-catalog", Commit: askCommit}
	if kind == sdkstep.AskDelivery {
		a.Asker = "mesh-delivery-builder"
		a.Build = &sdkstep.BuildJob{Module: "gitea", Path: "modules/gitea", Fetch: &fetch, Artifacts: []sdkstep.AskArtifact{{Artifact: "code"}}}
	} else {
		a.Check = &sdkstep.CheckJob{Fetch: fetch, Levels: []string{sdkstep.LevelUnit}}
	}
	return a
}

// 1887/A3node: a pulled build ask runs fetch then build and its key names the reference; a check ask tests each module
// directory the fetch named.
func TestAPulledNodeAskRunsItsJob(t *testing.T) {
	states := newStates()
	m := moduleWith(states, "v26.10.0")
	m.Capacity = func() int { return 1 }
	var calls []string
	src := buildstep.NewFakeAsks()
	build, check := nodeAsk(sdkstep.AskDelivery), nodeAsk(sdkstep.AskCheck)
	_ = src.PublishAsk(check)
	_ = src.PublishAsk(build)
	p := m.Puller(fakeSteps(&calls), src)
	p.PullWait = 10 * time.Millisecond
	ctx, stop := context.WithCancel(context.Background())
	defer stop()
	go p.Pull(ctx)
	for deadline := time.Now().Add(3 * time.Second); ; time.Sleep(5 * time.Millisecond) {
		if acked, _, _ := src.Fates(); len(acked) == 2 {
			break
		}
		if time.Now().After(deadline) {
			t.Fatalf("the asks were not both acked: calls %v", calls)
		}
	}
	if got := strings.Join(calls, ","); got != "build_node_fetch,build_node_build,build_node_fetch,build_node_test" {
		t.Errorf("calls = %s, want the delivery ask's job first, then the check's", got)
	}
	key, _ := sdkstep.AskStepKey("ace", build.ID)
	states.mu.Lock()
	v := states.steps[key]
	states.mu.Unlock()
	if len(v) == 0 || !strings.Contains(string(v[len(v)-1].Result), "artifact-store://gitea/code@sha256:bb") {
		t.Fatalf("the step %s = %v", key, v)
	}
}

// 1887/A3node, A7: the manifest takes the node's build capacity as a setting, with the builder's default, in a settings
// file; the seat's verbs are served.
func TestManifestTakesTheBuildCapacity(t *testing.T) {
	m := readManifest(t)
	raw, _ := os.ReadFile(moduleDir + "/module.json")
	var doc struct {
		Config map[string]struct {
			Default              json.RawMessage `json:"default"`
			Pattern, Description string
		} `json:"config"`
	}
	_ = json.Unmarshal(raw, &doc)
	// Issue 1806's follow-up: the cores a step needs is a setting of its own, in the settings file, with the SDK's default.
	if cores := string(doc.Config[buildstep.CoresPerStepSetting].Default); cores != fmt.Sprint(buildstep.DefaultCoresPerStep[sdkstep.AskNode]) {
		t.Errorf("the cores-per-step default = %s, want %g", cores, buildstep.DefaultCoresPerStep[sdkstep.AskNode])
	}
	if got := buildstep.NodeCoresPerStep(moduleDir+"/files/settings.json", 0, nil)(); got != buildstep.DefaultCoresPerStep[sdkstep.AskNode] {
		t.Errorf("the settings template holds cores-per-step %g", got)
	}
	// And the build hours (the operator, 2026-10-26): a setting of their own, empty by default (any hour), in the template.
	if hours := string(doc.Config[buildstep.BuildHoursSetting].Default); hours != `""` {
		t.Errorf("the build-hours default = %s, want empty", hours)
	}
	if w, fault := buildstep.NodeBuildHours(moduleDir+"/files/settings.json", "g14", t.Errorf)(); w != nil || fault != "" {
		t.Errorf("the settings template holds build hours %v (%s)", w, fault)
	}
	// ADR 0567 §15: build-hours names no node (one window, or empty for any hour) and capacity defaults to 0.
	window := regexp.MustCompile("^(?:" + doc.Config[buildstep.BuildHoursSetting].Pattern + ")$")
	for value, ok := range map[string]bool{"": true, "18:00-06:00": true, "g14=18:00-06:00": false, "18:00": false} {
		if window.MatchString(value) != ok {
			t.Errorf("build-hours pattern on %q: accepted %v, want %v", value, !ok, ok)
		}
	}
	if strings.Contains(doc.Config[buildstep.BuildHoursSetting].Description, "=") {
		t.Errorf("the build-hours description names a node pair")
	}
	var capacity float64
	_ = json.Unmarshal(doc.Config[sdkstep.CapacitySetting].Default, &capacity)
	if capacity != 0 {
		t.Errorf("the capacity's default = %g, want 0", capacity)
	}
	if resource(t, m, "settings")["path"] != "${dir:state}/settings.json" {
		t.Error("no settings file")
	}
	m0 := &Module{Node: "ace", Capacity: func() int { return 0 }}
	served := map[string]bool{}
	for _, tool := range m0.SeatTools(m0.Puller(nil, buildstep.NewFakeAsks())) {
		served[tool.Name] = true
	}
	for _, verb := range []string{"current", "pause", "resume"} {
		if !served[Seat+"."+verb] {
			t.Errorf("%s.%s is not served", Seat, verb)
		}
	}
}