package console_test

import (
	"bytes"
	"context"
	"errors"
	"net/http"
	"slices"
	"strconv"
	"strings"
	"testing"

	"git.golem15.com/golem15/summercms/modules/bonfire"
	"git.golem15.com/golem15/summercms/modules/lagoon"
	"git.golem15.com/jakub/sm-bm-plugin/classes"
	"git.golem15.com/jakub/sm-bm-plugin/console"
	"git.golem15.com/jakub/sm-bm-plugin/internal/searchtest"
	"gorm.io/driver/postgres"
	"gorm.io/gorm"
)

func TestMaterialsReindexRefuses(t *testing.T) {
	asked := false
	deps := console.MaterialsReindexDeps{
		DB: func(context.Context) (*gorm.DB, func(), error) {
			asked = true
			return nil, func() {}, nil
		},
		Index: classes.NewMaterialIndexer(searchtest.App(t)),
	}
	cmds := []bonfire.Command{console.MaterialsReindexCommand(deps)}
	var out bytes.Buffer
	err := bonfire.Call(context.Background(), cmds, console.MaterialsReindexName, nil, &out)
	if err == nil || !strings.Contains(err.Error(), "search.driver") || !strings.Contains(err.Error(), "search.typesense.api_key") {
		t.Errorf("unconfigured engine: err = %v, want the configuration hint", err)
	}
	out.Reset()
	if err := bonfire.Call(context.Background(), cmds, console.MaterialsReindexName, []string{"--if-configured"}, &out); err != nil {
		t.Errorf("--if-configured: %v", err)
	}
	if !strings.Contains(out.String(), "not configured") {
		t.Errorf("--if-configured output %q, want the notice", out.String())
	}
	if asked {
		t.Error("the command opened the database without an engine")
	}
}

func TestMaterialsReindexFresh(t *testing.T) {
	stub := &searchtest.Stub{}
	app := searchtest.App(t, searchtest.Start(t, stub)...)
	gdb, err := gorm.Open(postgres.New(postgres.Config{DSN: "host=127.0.0.1"}), &gorm.Config{DryRun: true, DisableAutomaticPing: true})
	if err != nil {
		t.Fatal(err)
	}
	sqlDB, err := gdb.DB()
	if err != nil {
		t.Fatal(err)
	}
	if err := lagoon.Publish(app, sqlDB, gdb); err != nil {
		t.Fatal(err)
	}
	deps := console.MaterialsReindexDeps{
		DB:    func(context.Context) (*gorm.DB, func(), error) { return gdb, func() {}, nil },
		Index: classes.NewMaterialIndexer(app),
	}
	cmds := []bonfire.Command{console.MaterialsReindexCommand(deps)}
	coll := "/collections/" + searchtest.Index
	var out bytes.Buffer
	for run := 1; run <= 2; run++ {
		before := len(stub.Requests())
		out.Reset()
		if err := bonfire.Call(context.Background(), cmds, console.MaterialsReindexName, []string{"--fresh"}, &out); err != nil {
			t.Fatalf("run %d: %v\n%s", run, err, out.String())
		}
		var sent []string
		for _, r := range stub.Requests()[before:] {
			sent = append(sent, r.Method+" "+r.Path)
		}
		if want := []string{http.MethodDelete + " " + coll, http.MethodGet + " " + coll, http.MethodPost + " /collections"}; !slices.Equal(sent, want) {
			t.Errorf("run %d sent %v, want %v", run, sent, want)
		}
		if !strings.Contains(out.String(), "Reindexed: 0 synced, 0 failed") {
			t.Errorf("run %d output %q", run, out.String())
		}
	}
	// The second run dropped the collection the first one created.
	if !strings.Contains(out.String(), "Dropped "+searchtest.Index) {
		t.Errorf("second run output %q, want Dropped", out.String())
	}
}

func TestMaterialsReindexBackfill(t *testing.T) {
	ctx := context.Background()
	var calls []string
	var synced []uint
	sync := func(id uint) error {
		calls = append(calls, "sync "+strconv.FormatUint(uint64(id), 10))
		synced = append(synced, id)
		return nil
	}

	// pdftotext missing on the first material: one warning, no more
	// backfill calls, and every material is still synced.
	deps := console.MaterialsReindexDeps{Backfill: func(_ context.Context, _ *gorm.DB, id uint) error {
		calls = append(calls, "backfill "+strconv.FormatUint(uint64(id), 10))
		return classes.ErrPDFToolMissing
	}}
	var stdout, stderr bytes.Buffer
	run := console.NewReindexRun(deps, sync, bonfire.NewOutput(strings.NewReader(""), &stdout, &stderr))
	for _, id := range []uint{1, 2, 3} {
		run.Material(ctx, nil, id)
	}
	if want := []string{"backfill 1", "sync 1", "sync 2", "sync 3"}; !slices.Equal(calls, want) {
		t.Errorf("calls = %v, want %v", calls, want)
	}
	if !slices.Equal(synced, []uint{1, 2, 3}) {
		t.Errorf("synced = %v, want all three", synced)
	}
	all := stdout.String() + stderr.String()
	if n := strings.Count(all, "pdftotext not found"); n != 1 {
		t.Errorf("the tool warning was printed %d times, want once:\n%s", n, all)
	}
	if !strings.Contains(all, "install poppler-utils") {
		t.Errorf("output %q, want the poppler-utils hint", all)
	}
	if s, f, noTool := run.Counts(); s != 3 || f != 0 || !noTool {
		t.Errorf("counts = %d synced %d failed noTool %v, want 3 0 true", s, f, noTool)
	}

	// Another backfill error warns for that material only; it is still
	// synced and the next material is backfilled. A failed sync counts.
	calls, synced = nil, nil
	stdout.Reset()
	stderr.Reset()
	deps.Backfill = func(_ context.Context, _ *gorm.DB, id uint) error {
		calls = append(calls, "backfill "+strconv.FormatUint(uint64(id), 10))
		if id == 1 {
			return errors.New("blob gone")
		}
		return nil
	}
	failing := func(id uint) error {
		if err := sync(id); err != nil || id == 3 {
			return errors.New("engine down")
		}
		return nil
	}
	run = console.NewReindexRun(deps, failing, bonfire.NewOutput(strings.NewReader(""), &stdout, &stderr))
	for _, id := range []uint{1, 2, 3} {
		run.Material(ctx, nil, id)
	}
	if want := []string{"backfill 1", "sync 1", "backfill 2", "sync 2", "backfill 3", "sync 3"}; !slices.Equal(calls, want) {
		t.Errorf("calls = %v, want %v", calls, want)
	}
	all = stdout.String() + stderr.String()
	if !strings.Contains(all, "material 1: file text: blob gone") || strings.Contains(all, "pdftotext not found") {
		t.Errorf("output %q, want the material 1 file text warning only", all)
	}
	if s, f, noTool := run.Counts(); s != 2 || f != 1 || noTool {
		t.Errorf("counts = %d synced %d failed noTool %v, want 2 1 false", s, f, noTool)
	}

	// No Backfill: only syncs.
	calls = nil
	run = console.NewReindexRun(console.MaterialsReindexDeps{}, sync, bonfire.NewOutput(strings.NewReader(""), &stdout, &stderr))
	run.Material(ctx, nil, 9)
	if !slices.Equal(calls, []string{"sync 9"}) {
		t.Errorf("calls without Backfill = %v", calls)
	}
}