package ingest

import (
	"os"
	"path/filepath"
	"strings"
	"time"
)

var _ Ingester = (*ObsidianFileIngester)(nil)

type ObsidianFileIngester struct {
	Version string
	Vault   string
}

func NewObsidianFileIngester(vault string) *ObsidianFileIngester {
	return &ObsidianFileIngester{Version: "obsidian-file/v1", Vault: vault}
}

func (o *ObsidianFileIngester) SourceID() string { return "obsidian" }

func (o *ObsidianFileIngester) Ingest(path string) (*IngestResult, error) {
	if !strings.HasSuffix(path, ".md") {
		return nil, nil
	}

	data, err := os.ReadFile(path)
	if err != nil || len(data) < 10 {
		return nil, nil
	}

	content := string(data)
	title := extractObsidianTitle(content, path, o.Vault)
	tags := extractObsidianTags(content)
	created, _ := extractObsidianTimestamps(content, path)
	if created == "" {
		if fi, err := os.Stat(path); err == nil {
			created = fi.ModTime().UTC().Format(time.RFC3339)
		}
	}

	fp := FingerprintWithMeta(data, map[string]string{
		"source": "obsidian",
		"path":   path,
	})

	relPath, _ := filepath.Rel(o.Vault, path)
	summary := extractBodyPreview(content, 200)

	return &IngestResult{
		Fingerprint:     fp,
		SourceID:        o.SourceID(),
		SourcePath:      relPath,
		Project:         filepath.Base(o.Vault),
		ContentType:     ".md",
		Title:           title,
		Summary:         summary,
		CreatedAt:       created,
		LineEnd:         len(strings.Split(content, "\n")),
		Confidence:      0.85,
		IngesterVersion: o.Version,
		Provenance: map[string]any{
			"path":       relPath,
			"tags":       tags,
			"note_title": title,
		},
	}, nil
}