// Copyright (c) 2026 Probo Inc <hello@probo.com>.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

package commonthirdparty

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"sort"
	"strings"
	"time"

	"github.com/charmbracelet/lipgloss"
	"github.com/spf13/cobra"
	"go.gearno.de/kit/pg"
	clicmdutil "go.probo.inc/probo/pkg/cmd/cmdutil"
	"go.probo.inc/probo/pkg/coredata"
	"go.probo.inc/probo/pkg/proboctl/cmdutil"
)

// enrichmentMetadataView mirrors the subset of the enrichment payload
// (written by the common-third-party enrichment worker) that show
// renders. It is decoded locally to avoid a dependency on the thirdparty
// package.
type enrichmentMetadataView struct {
	Model       string                             `json:"model"`
	AttemptedAt time.Time                          `json:"attempted_at"`
	Status      string                             `json:"status"`
	Error       string                             `json:"error"`
	Fields      map[string]enrichmentFieldMetaView `json:"fields"`
	Domains     []enrichmentDomainMetaView         `json:"domains"`
}

type enrichmentFieldMetaView struct {
	Confidence float64 `json:"confidence"`
	SourceURL  string  `json:"source_url"`
	Status     string  `json:"status"`
	Source     string  `json:"source"`
}

type enrichmentDomainMetaView struct {
	Domain     string  `json:"domain"`
	Confidence float64 `json:"confidence"`
}

func newCmdShow(f *cmdutil.Factory) *cobra.Command {
	cmd := &cobra.Command{
		Use:   "show <gid|slug>",
		Short: "Show a single common third party with its domains and linked pattern count",
		Args:  cobra.ExactArgs(1),
	}

	output := clicmdutil.AddOutputFlag(cmd)

	cmd.RunE = func(cmd *cobra.Command, args []string) error {
		if err := clicmdutil.ValidateOutputFlag(output); err != nil {
			return err
		}

		pgClient, err := f.PgClient()
		if err != nil {
			return err
		}

		var (
			party        coredata.CommonThirdParty
			domains      coredata.CommonThirdPartyDomains
			patternCount int
		)

		if err := pgClient.WithConn(
			cmd.Context(),
			func(ctx context.Context, conn pg.Querier) error {
				party, err = resolveCommonThirdParty(ctx, conn, args[0])
				if err != nil {
					return err
				}

				if err := domains.LoadByCommonThirdPartyID(ctx, conn, party.ID); err != nil {
					return fmt.Errorf("cannot load domains: %w", err)
				}

				var patterns coredata.CommonTrackerPatterns
				if err := patterns.LoadByCommonThirdPartyID(ctx, conn, party.ID); err != nil {
					return fmt.Errorf("cannot load linked patterns: %w", err)
				}

				patternCount = len(patterns)

				return nil
			},
		); err != nil {
			return err
		}

		if *output == clicmdutil.OutputJSON {
			return clicmdutil.PrintJSON(f.IOStreams.Out, map[string]any{
				"thirdParty":         party,
				"domains":            domains,
				"linkedPatternCount": patternCount,
			})
		}

		out := f.IOStreams.Out
		label := lipgloss.NewStyle().Foreground(lipgloss.Color("242")).Width(20)
		row := func(name, value string) {
			_, _ = fmt.Fprintf(out, "%s%s\n", label.Render(name), value)
		}

		row("ID:", party.ID.String())
		row("Name:", party.Name)
		row("Slug:", party.Slug)
		row("Category:", string(party.Category))

		if party.WebsiteURL != nil {
			row("Website:", *party.WebsiteURL)
		}

		domainNames := make([]string, 0, len(domains))
		for _, d := range domains {
			domainNames = append(domainNames, d.Domain)
		}

		if len(domainNames) > 0 {
			row("Domains:", strings.Join(domainNames, ", "))
		} else {
			row("Domains:", "(none)")
		}

		row("Linked patterns:", fmt.Sprintf("%d", patternCount))
		row("Created:", party.CreatedAt.Format("2006-01-02 15:04:05"))
		row("Updated:", party.UpdatedAt.Format("2006-01-02 15:04:05"))

		row("Enrichment state:", enrichmentState(&party))
		row("Enrichment attempts:", fmt.Sprintf("%d", party.EnrichmentAttempts))

		if party.LastEnrichmentAttemptAt != nil {
			row("Last attempt:", party.LastEnrichmentAttemptAt.Format("2006-01-02 15:04:05"))
		}

		if party.EnrichmentRequestedAt != nil {
			row("Queued at:", party.EnrichmentRequestedAt.Format("2006-01-02 15:04:05"))
		}

		printEnrichmentDetails(out, label, party)

		return nil
	}

	return cmd
}

// printEnrichmentDetails renders the run-level status and per-field
// provenance recorded in the enrichment payload, when present.
func printEnrichmentDetails(out io.Writer, label lipgloss.Style, party coredata.CommonThirdParty) {
	if len(party.Enrichment) == 0 {
		return
	}

	var meta enrichmentMetadataView
	if err := json.Unmarshal(party.Enrichment, &meta); err != nil {
		return
	}

	row := func(name, value string) {
		_, _ = fmt.Fprintf(out, "%s%s\n", label.Render(name), value)
	}

	if meta.Status != "" {
		row("Last run status:", meta.Status)
	}

	if !meta.AttemptedAt.IsZero() {
		row("Last run recorded:", meta.AttemptedAt.Format("2006-01-02 15:04:05"))
	}

	if meta.Model != "" {
		row("Enrichment model:", meta.Model)
	}

	if meta.Error != "" {
		row("Last error:", meta.Error)
	}

	if len(meta.Fields) > 0 {
		names := make([]string, 0, len(meta.Fields))
		for name := range meta.Fields {
			names = append(names, name)
		}

		sort.Strings(names)

		_, _ = fmt.Fprintln(out)

		table := clicmdutil.NewTable("FIELD", "STATUS", "SOURCE", "CONF")

		for _, name := range names {
			fm := meta.Fields[name]
			table.Row(name, fm.Status, fm.Source, fmt.Sprintf("%.2f", fm.Confidence))
		}

		_, _ = fmt.Fprintln(out, table.Render())
	}

	if len(meta.Domains) > 0 {
		_, _ = fmt.Fprintln(out)

		table := clicmdutil.NewTable("DISCOVERED DOMAIN", "CONF")
		for _, d := range meta.Domains {
			table.Row(d.Domain, fmt.Sprintf("%.2f", d.Confidence))
		}

		_, _ = fmt.Fprintln(out, table.Render())
	}
}