package processing

import (
	"context"
	"fmt"
	"strings"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5/pgxpool"
)

// SyncCompanyA1Opts controls admin Sync A1 (dump category backfill + Fix hygiene).
// Default is backfill-categories + hygiene — never a full wipe/reimport.
type SyncCompanyA1Opts struct {
	FixCompanyCatalogOpts
	// MySQLDumpPath is an explicit dump path; empty triggers auto-detect
	// (SEED_A1_MYSQL_DUMP + MySQLDumpCandidates).
	MySQLDumpPath string
	// SkipDumpBackfill skips dump scan even when a dump is found.
	SkipDumpBackfill bool
}

// SyncCompanyA1Result combines dump category backfill with FixCompanyCatalogResult.
type SyncCompanyA1Result struct {
	FixCompanyCatalogResult

	DumpFound            bool   `json:"dump_found"`
	DumpPath             string `json:"dump_path,omitempty"`
	DumpSkippedReason    string `json:"dump_skipped_reason,omitempty"`
	DumpPairs            int    `json:"dump_pairs"`
	DumpMappedUpdated    int64  `json:"dump_mapped_updated"`
	DumpProcessedUpdated int64  `json:"dump_processed_updated"`
	PurgedOtherRaw       int64  `json:"purged_other_raw"`
	PurgedOtherPP        int64  `json:"purged_other_pp"`
	// DumpStatus is a short label for flash UI ({dump_status}).
	DumpStatus string `json:"dump_status"`
}

// SyncCompanyA1 runs dump→category backfill when a MySQL dump is available, then
// FixCompanyCatalog hygiene. Does not wipe or reimport the catalog.
func SyncCompanyA1(ctx context.Context, pool *pgxpool.Pool, companyID uuid.UUID, companyName string, a1Cohort bool, opts SyncCompanyA1Opts) (SyncCompanyA1Result, error) {
	out := SyncCompanyA1Result{
		FixCompanyCatalogResult: FixCompanyCatalogResult{
			CompanyID:   companyID,
			CompanyName: companyName,
			A1Cohort:    a1Cohort,
		},
		DumpStatus: "skipped",
	}
	if pool == nil {
		return out, fmt.Errorf("nil pool")
	}

	dumpPath := strings.TrimSpace(opts.MySQLDumpPath)
	if !opts.SkipDumpBackfill {
		resolved := ResolveMySQLDumpPath(dumpPath)
		if resolved != "" {
			out.DumpFound = true
			out.DumpPath = resolved
			dumpRes, err := BackfillCategoriesFromMySQLDump(ctx, pool, companyID, resolved)
			if err != nil {
				return out, fmt.Errorf("dump category backfill: %w", err)
			}
			out.DumpPairs = dumpRes.DumpPairs
			out.DumpMappedUpdated = dumpRes.MappedUpdated
			out.DumpProcessedUpdated = dumpRes.ProcessedUpdated
			out.DumpStatus = "ok"

			rawN, ppN, err := PurgeA1FixtureEANsFromOtherTenants(ctx, pool, companyID)
			if err != nil {
				return out, fmt.Errorf("purge fixture eans: %w", err)
			}
			out.PurgedOtherRaw = rawN
			out.PurgedOtherPP = ppN
		} else if dumpPath != "" {
			out.DumpSkippedReason = fmt.Sprintf("mysql dump not found at %q and no auto-detect match", dumpPath)
			out.DumpStatus = "missing"
		} else {
			out.DumpSkippedReason = "no MySQL dump (set SEED_A1_MYSQL_DUMP or place descrybe_new.sql in scripts/seed or ~/Downloads); continuing with DB hygiene only"
			out.DumpStatus = "missing"
		}
	} else {
		out.DumpSkippedReason = "dump backfill skipped by request"
		out.DumpStatus = "skipped"
	}

	fixRes, err := FixCompanyCatalog(ctx, pool, companyID, companyName, a1Cohort, opts.FixCompanyCatalogOpts)
	if err != nil {
		return out, err
	}
	out.FixCompanyCatalogResult = fixRes
	return out, nil
}