package main

// Phase 13 (faceted plan): force rescan = original-scan semantics, and
// the manually_edited filter.
//
// Force rescan contract: re-review every field on every book from all
// sources (sidecars → folder structure → tags → fallbacks) on multi-
// file books too — the pre-Phase-13 skip is gone — with
// metadata_overrides as the only protection. A force pass also stamps
// the fresh manifest with the current parser version (success-only)
// and closes the book's open ledger issues.

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"path/filepath"
	"testing"
	"time"

	"bookhoard/internal/database"
	"bookhoard/internal/services"

	"github.com/jackc/pgx/v5/pgtype"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// pinExtractorVersionOne pins the SHARED dev DB's extractor version to
// the default 1 for the test's duration. Prior interrupted runs can
// leave it bumped (an early test failure aborts before its restore
// cleanup registers), and every stamp assertion in these tests assumes
// the default. The cleanup restores 1 — the repo's steady state.
func pinExtractorVersionOne(t *testing.T, setup *TestServerSetup) {
	t.Helper()
	setExtractorVersion(t, setup, 1)
	t.Cleanup(func() { setExtractorVersion(t, setup, 1) })
}

// forceScanTestFolder runs a FORCE scan over one folder.
func forceScanTestFolder(t *testing.T, setup *TestServerSetup, adminID pgtype.UUID, folder string) {
	t.Helper()
	scanner := services.NewMediaScanner(setup.DB)
	defer func() { _ = scanner.Close() }()
	scanner.SetAdminID(adminID)
	require.NoError(t, scanner.SetFolders([]string{folder}, false))
	scanner.SetForce(true)
	require.NoError(t, scanner.ScanFolders(context.Background()))
}

func TestForceRescanMultifileSidecarApply(t *testing.T) {
	setup := setupTestServer(t)
	t.Cleanup(func() { _ = setup.Close() })

	ctx := context.Background()
	admin, _ := moveTestAdminID(t, setup)
	pinExtractorVersionOne(t, setup)
	libID, folder := audioTestLibrary(t, setup, fmt.Sprintf("Test Force Rescan %d", time.Now().UnixNano()))
	t.Cleanup(func() { deleteLibraries(t, setup, libID) })

	writeTestTrack(t, filepath.Join(folder, "Force Author", "Force Title", "01 First.mp3"))
	writeTestTrack(t, filepath.Join(folder, "Force Author", "Force Title", "02 Second.mp3"))

	scanTestFolder(t, setup, admin, folder)
	rel := filepath.ToSlash("Force Author/Force Title")
	book, found := findAudioItemByPath(t, setup, libID, rel)
	require.True(t, found, "folder book must import")
	require.Equal(t, "Force Title", book.Title)

	// Corrupt, then FORCE: the pre-Phase-13 skip is gone — the full
	// chain re-derives the title from the folder basename.
	corruptItemColumn(t, setup, book.ID, "title", "ZZZ")
	forceScanTestFolder(t, setup, admin, folder)
	book, found = findAudioItemByPath(t, setup, libID, rel)
	require.True(t, found)
	require.Equal(t, "Force Title", book.Title, "force rescan must re-apply folder-book metadata")
	require.Equal(t, 1, storedManifestEv(t, setup, book.ID), "force rescan stamps the current parser version")

	// metadata_overrides is the ONLY protection: a recorded override
	// survives the force pass untouched.
	_, err := setup.DBPool.Exec(ctx,
		`UPDATE media_items SET metadata_overrides = ARRAY['title'], title = 'Manual Title' WHERE id = $1`,
		book.ID)
	require.NoError(t, err)
	forceScanTestFolder(t, setup, admin, folder)
	book, _ = findAudioItemByPath(t, setup, libID, rel)
	require.Equal(t, "Manual Title", book.Title, "metadata_overrides protect manual edits under force rescan")
}

func TestForceRescanSingleFileSidecarReapply(t *testing.T) {
	setup := setupTestServer(t)
	t.Cleanup(func() { _ = setup.Close() })

	admin, _ := moveTestAdminID(t, setup)
	pinExtractorVersionOne(t, setup)
	libID, folder := createTypedTestLibrary(t, setup, fmt.Sprintf("Test Force Single %d", time.Now().UnixNano()), "ebooks")
	t.Cleanup(func() { deleteLibraries(t, setup, libID) })

	bookDir := filepath.Join(folder, "Force Probe Author", "Force Probe Book")
	require.NoError(t, os.MkdirAll(bookDir, 0o755))
	opf := `<?xml version='1.0' encoding='utf-8'?>
<package xmlns="http://www.idpf.org/2007/opf" version="2.0">
  <metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
    <dc:title>Force Probe Book</dc:title>
    <dc:creator>Force Probe Author</dc:creator>
  </metadata>
</package>`
	require.NoError(t, os.WriteFile(filepath.Join(bookDir, "metadata.opf"), []byte(opf), 0o644))
	require.NoError(t, os.WriteFile(filepath.Join(bookDir, "Force Probe Book.epub"), []byte("dummy epub content"), 0o644))

	scanTestFolder(t, setup, admin, folder)
	rel := filepath.ToSlash("Force Probe Author/Force Probe Book/Force Probe Book.epub")
	book, found := findAudioItemByPath(t, setup, libID, rel)
	require.True(t, found)

	// Single-file force rescan already ran the full chain — pin it, and
	// pin the NEW part: the manifest comes out stamped.
	corruptItemColumn(t, setup, book.ID, "title", "ZZZ")
	forceScanTestFolder(t, setup, admin, folder)
	book, found = findAudioItemByPath(t, setup, libID, rel)
	require.True(t, found)
	require.Equal(t, "Force Probe Book", book.Title, "force rescan re-derives sidecar metadata (single-file)")
	require.Equal(t, 1, storedManifestEv(t, setup, book.ID), "force rescan stamps the manifest")
}

func TestManuallyEditedFilter(t *testing.T) {
	setup := setupTestServer(t)
	t.Cleanup(func() { _ = setup.Close() })

	ctx := context.Background()
	libID, _ := createTypedTestLibrary(t, setup, fmt.Sprintf("Test Manual Edits %d", time.Now().UnixNano()), "ebooks")
	t.Cleanup(func() { deleteLibraries(t, setup, libID) })

	createBook := func(path string) pgtype.UUID {
		created, err := setup.DB.CreateMediaItem(ctx, database.CreateMediaItemParams{
			LibraryID: libID,
			Title:     path,
			Authors:   []string{},
			FilePath:  path,
			FileSize:  pgtype.Int8{Int64: 64, Valid: true},
			MimeType:  pgtype.Text{String: "application/epub+zip", Valid: true},
		})
		require.NoError(t, err)
		return created.ID
	}
	editedID := createBook("edited-book.epub")
	cleanID := createBook("clean-book.epub")
	_, err := setup.DBPool.Exec(ctx,
		`UPDATE media_items SET metadata_overrides = ARRAY['title'] WHERE id = $1`,
		editedID)
	require.NoError(t, err)

	qfIDs := func(op string) []string {
		status, rows := qfSearch(t, setup, setup.Token, map[string][]string{
			"qf":         {qfAll(qfRule("manually_edited", op))},
			"library_id": {libID.String()},
		})
		require.Equal(t, http.StatusOK, status)
		ids := make([]string, 0, len(rows))
		for _, r := range rows {
			ids = append(ids, r["id"].(string))
		}
		return ids
	}

	trueIDs := qfIDs("is_true")
	require.Len(t, trueIDs, 1)
	assert.Equal(t, editedID.String(), trueIDs[0], "is_true matches only manually-edited books")

	falseIDs := qfIDs("is_false")
	require.Len(t, falseIDs, 1)
	assert.Equal(t, cleanID.String(), falseIDs[0], "is_false matches only untouched books")

	// The deep-linkable JSON shape round-trips through the qf parser
	// (arity-none rule: no values on the wire).
	var parsed struct {
		Mode     string `json:"mode"`
		Children []struct {
			Field string `json:"field"`
		} `json:"children"`
	}
	require.NoError(t, json.Unmarshal([]byte(qfAll(qfRule("manually_edited", "is_true"))), &parsed))
	require.Len(t, parsed.Children, 1)
	assert.Equal(t, "manually_edited", parsed.Children[0].Field)
}