// Cthulhu screen reader.
// Copyright (c) 2026 Storm Dragon
// Authors: Storm Dragon, Angus Kola
//
// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along with
// this program. If not, see <https://www.gnu.org/licenses/gpl-3.0.html>.

package parity

import (
	"errors"
	"strings"
	"testing"
)

func TestLoadValidLedger(t *testing.T) {
	ledger := strings.Join([]string{
		strings.Join(columns, ","),
		"core-startup,src/cthulhu/cthulhu.py,core,start the screen reader,Storm Dragon,internal/app,pending,,,,,,initial inventory",
		"web-navigation,src/cthulhu/scripts/web/script.py,web,structural navigation,Storm Dragon,internal/script,pending,,,,,,initial inventory",
	}, "\n")

	records, err := Load(strings.NewReader(ledger))
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if len(records) != 2 {
		t.Fatalf("record count = %d, want 2", len(records))
	}
}

func TestLoadRejectsInvalidRecords(t *testing.T) {
	tests := []struct {
		name    string
		ledger  string
		wantErr error
	}{
		{
			name:    "missing header",
			ledger:  "id\n",
			wantErr: ErrSchema,
		},
		{
			name: "invalid status",
			ledger: strings.Join([]string{
				strings.Join(columns, ","),
				"one,source.py,core,behavior,owner,destination,unknown,,,,,,note",
			}, "\n"),
			wantErr: ErrSchema,
		},
		{
			name: "duplicate id",
			ledger: strings.Join([]string{
				strings.Join(columns, ","),
				"one,source.py,core,behavior,owner,destination,pending,,,,,,note",
				"one,source.py,core,behavior,owner,destination,pending,,,,,,note",
			}, "\n"),
			wantErr: ErrSchema,
		},
		{
			name: "missing destination",
			ledger: strings.Join([]string{
				strings.Join(columns, ","),
				"one,source.py,core,behavior,owner,,pending,,,,,,note",
			}, "\n"),
			wantErr: ErrSchema,
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			_, err := Load(strings.NewReader(test.ledger))
			if !errors.Is(err, test.wantErr) {
				t.Fatalf("Load error = %v, want %v", err, test.wantErr)
			}
		})
	}
}