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package day

import (
	"strings"
	"testing"
)

func sp(s string) *string { return &s }

func TestResolveLogExplicitActivity(t *testing.T) {
	blocks := map[int]string{28: "old"}
	asg, over, err := ResolveLog([]int{28, 29}, sp("new"), blocks, nil, 30)
	if err != nil {
		t.Fatal(err)
	}
	if len(asg) != 2 || *asg[28] != "new" || *asg[29] != "new" {
		t.Fatalf("assignments %v", asg)
	}
	if len(over) != 1 || over[0].Index != 28 || *over[0].FromID != "old" || *over[0].ToID != "new" {
		t.Fatalf("overwrites %v", over)
	}
}

func TestResolveLogSameActivityNoOverwrite(t *testing.T) {
	blocks := map[int]string{28: "same"}
	_, over, err := ResolveLog([]int{28}, sp("same"), blocks, nil, 30)
	if err != nil {
		t.Fatal(err)
	}
	if len(over) != 0 {
		t.Fatalf("re-logging same activity should not count as overwrite: %v", over)
	}
}

func TestResolveLogPlanFill(t *testing.T) {
	plan := map[int]string{29: "planned-a", 30: "planned-b"}
	asg, over, err := ResolveLog([]int{29, 30}, nil, map[int]string{}, plan, 30)
	if err != nil {
		t.Fatal(err)
	}
	if *asg[29] != "planned-a" || *asg[30] != "planned-b" {
		t.Fatalf("assignments %v", asg)
	}
	if len(over) != 0 {
		t.Fatalf("overwrites %v", over)
	}
}

func TestResolveLogPlanFillMissingPlanAllOrNothing(t *testing.T) {
	plan := map[int]string{29: "planned-a"}
	_, _, err := ResolveLog([]int{29, 30, 31}, nil, map[int]string{}, plan, 30)
	if err == nil {
		t.Fatal("want error for slots without plan")
	}
	msg := err.Error()
	if !strings.Contains(msg, "15:00") || !strings.Contains(msg, "15:30") {
		t.Fatalf("error should list offending slots (blockSize 30): %q", msg)
	}
}

func TestResolveClear(t *testing.T) {
	blocks := map[int]string{28: "a"}
	asg, cleared := ResolveClear([]int{28, 29}, blocks)
	if len(asg) != 1 || asg[28] != nil {
		t.Fatalf("assignments %v", asg)
	}
	if len(cleared) != 1 || cleared[0].Index != 28 || *cleared[0].FromID != "a" || cleared[0].ToID != nil {
		t.Fatalf("cleared %v", cleared)
	}
}