package provider

import (
	"encoding/json"
	"orchestra/internal/domain"
	"strings"
	"testing"
)

type sink struct{ events []domain.Event }

func (s *sink) Append(e domain.Event) error { s.events = append(s.events, e); return nil }
func TestJSONLIngest(t *testing.T) {
	s := &sink{}
	n, err := (JSONL{}).Ingest(strings.NewReader("{\"source\":\"local\",\"external_id\":\"1\",\"project\":\"demo\"}\n"), s)
	if err != nil || n != 1 || len(s.events) != 1 {
		t.Fatalf("n=%d events=%d err=%v", n, len(s.events), err)
	}
}
func TestJSONLRejectsMalformedLine(t *testing.T) {
	n, err := (JSONL{}).Ingest(strings.NewReader("not-json\n"), &sink{})
	if err == nil || n != 0 {
		t.Fatalf("n=%d err=%v", n, err)
	}
}

// A Gitea issue states its own acceptance under one recognized heading. Before
// this, every Gitea-sourced task rendered "Acceptance: Not stated." no matter
// what the body said, because nothing on that path ever set the field.
func TestGiteaIssueAcceptanceSection(t *testing.T) {
	body := "improve ambiguous attribution.\n\n## acceptance\n- labelled score does not regress\n- targeted cases improve\n"
	e := Gitea{}.event(giteaIssue{Number: 7, Title: "fix attribution", Body: body}, "gitea", "p")
	var p struct {
		Description string   `json:"description"`
		Acceptance  []string `json:"acceptance"`
	}
	if err := json.Unmarshal(e.Payload, &p); err != nil {
		t.Fatal(err)
	}
	if p.Description != "improve ambiguous attribution." {
		t.Fatalf("description=%q, want the prose without the acceptance section", p.Description)
	}
	want := []string{"labelled score does not regress", "targeted cases improve"}
	if len(p.Acceptance) != len(want) {
		t.Fatalf("acceptance=%q, want %q", p.Acceptance, want)
	}
	for i := range want {
		if p.Acceptance[i] != want[i] {
			t.Fatalf("acceptance[%d]=%q, want %q (order is preserved)", i, p.Acceptance[i], want[i])
		}
	}
}

// A body with no recognized section yields no acceptance, and that is correct
// rather than an ingestion failure: the task renders "Not stated." and the
// frame phase resolves it through the decision-request path. Inferring
// criteria from arbitrary prose would invent requirements that outrank every
// human decision beneath them.
func TestGiteaIssueWithoutAcceptanceSectionStaysEmpty(t *testing.T) {
	body := "just do the thing.\n\n## notes\n- not an acceptance criterion\n"
	e := Gitea{}.event(giteaIssue{Number: 8, Title: "t", Body: body}, "gitea", "p")
	var p map[string]any
	if err := json.Unmarshal(e.Payload, &p); err != nil {
		t.Fatal(err)
	}
	if _, ok := p["acceptance"]; ok {
		t.Fatalf("acceptance=%v, want none", p["acceptance"])
	}
	if p["description"] != body {
		t.Fatalf("description=%q, want the body unchanged", p["description"])
	}
}

func TestSplitAcceptanceConventions(t *testing.T) {
	for _, tc := range []struct {
		name string
		body string
		desc string
		want []string
	}{
		{"checkboxes", "do it.\n\n## Acceptance\n- [ ] thing a works\n- [x] behaviour b unchanged\n", "do it.", []string{"thing a works", "behaviour b unchanged"}},
		{"acceptance criteria spelling", "do it.\n\n### Acceptance Criteria\n* one\n", "do it.", []string{"one"}},
		{"section ends at the next heading", "do it.\n\n## acceptance\n- one\n\n## notes\n- not acceptance\n", "do it.\n\n## notes\n- not acceptance", []string{"one"}},
		{"empty items ignored", "do it.\n\n## acceptance\n-\n- [ ]\n- real\n", "do it.", []string{"real"}},
		{"prose inside the section is not an item", "do it.\n\n## acceptance\nthese are the criteria:\n- one\n", "do it.", []string{"one"}},
		{"heading only", "do it.\n\n## acceptance\n", "do it.", nil},
	} {
		t.Run(tc.name, func(t *testing.T) {
			desc, got := splitAcceptance(tc.body)
			if desc != tc.desc {
				t.Fatalf("description=%q, want %q", desc, tc.desc)
			}
			if len(got) != len(tc.want) {
				t.Fatalf("acceptance=%q, want %q", got, tc.want)
			}
			for i := range tc.want {
				if got[i] != tc.want[i] {
					t.Fatalf("acceptance[%d]=%q, want %q", i, got[i], tc.want[i])
				}
			}
		})
	}
}