package web

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"git.d-ma.be/mathias/cad-atlas/internal/atlas"
)

func TestRootServesAtlas(t *testing.T) {
	srv := httptest.NewServer(NewHandler())
	defer srv.Close()

	resp, err := http.Get(srv.URL + "/")
	if err != nil {
		t.Fatalf("GET /: %v", err)
	}
	defer func() { _ = resp.Body.Close() }()

	if resp.StatusCode != http.StatusOK {
		t.Fatalf("GET / status = %d, want 200", resp.StatusCode)
	}
	buf := make([]byte, 4096)
	n, _ := resp.Body.Read(buf)
	if !strings.Contains(string(buf[:n]), "CAD") {
		t.Fatalf("GET / body missing atlas marker %q", "CAD")
	}
}

// This asserts the SHAPE the endpoint serves, not the exact CI job names.
//
// STAGE 06 has two sources: the embedded workflow (deterministic) and, when the
// forge is reachable, the live latest run — which overwrites it with real job
// names and a "▶ run #N" node. The old assertion demanded the workflow-derived
// names, so it passed on a laptop with no route to Gitea and failed inside CI,
// where the overlay works exactly as designed. It went red on 2026-08-19 for a
// commit that only touched atlas.json.
//
// The deterministic assertion lives in the atlas package
// (TestBuild_OverlaysCIStageNodesFromWorkflow), which feeds Build a fixed
// workflow and no network. Here we check the endpoint serves a usable atlas
// whichever source won.
func TestAtlasJSON_ServesAtlasWithPopulatedCIStage(t *testing.T) {
	srv := httptest.NewServer(NewHandler())
	defer srv.Close()

	resp, err := http.Get(srv.URL + "/api/atlas.json")
	if err != nil {
		t.Fatalf("GET /api/atlas.json: %v", err)
	}
	defer func() { _ = resp.Body.Close() }()

	if resp.StatusCode != http.StatusOK {
		t.Fatalf("status = %d, want 200", resp.StatusCode)
	}
	var a atlas.Atlas
	if err := json.NewDecoder(resp.Body).Decode(&a); err != nil {
		t.Fatalf("decode atlas: %v", err)
	}
	if len(a.Stages) == 0 {
		t.Fatal("atlas has no stages")
	}

	var ci *atlas.Stage
	for i := range a.Stages {
		if a.Stages[i].No == "STAGE 06" {
			ci = &a.Stages[i]
		}
	}
	if ci == nil {
		t.Fatal("STAGE 06 missing from the served atlas")
	}
	if len(ci.Nodes) == 0 {
		t.Fatal("STAGE 06 has no nodes — neither the embedded workflow nor the live run populated it")
	}
	for _, n := range ci.Nodes {
		if n.Title == "" {
			t.Fatalf("STAGE 06 node with no title: %+v", n)
		}
	}
}

func TestUnknownPath404(t *testing.T) {
	srv := httptest.NewServer(NewHandler())
	defer srv.Close()

	resp, err := http.Get(srv.URL + "/nope")
	if err != nil {
		t.Fatalf("GET /nope: %v", err)
	}
	defer func() { _ = resp.Body.Close() }()

	if resp.StatusCode != http.StatusNotFound {
		t.Fatalf("GET /nope status = %d, want 404", resp.StatusCode)
	}
}