package api

import (
	"encoding/json"
	"math"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestKeepAliveParsingFromJSON(t *testing.T) {
	tests := []struct {
		name string
		req  string
		exp  *Duration
	}{
		{
			name: "Positive Integer",
			req:  `{ "keep_alive": 42 }`,
			exp:  &Duration{42 * time.Second},
		},
		{
			name: "Positive Float",
			req:  `{ "keep_alive": 42.5 }`,
			exp:  &Duration{42 * time.Second},
		},
		{
			name: "Positive Integer String",
			req:  `{ "keep_alive": "42m" }`,
			exp:  &Duration{42 * time.Minute},
		},
		{
			name: "Negative Integer",
			req:  `{ "keep_alive": -1 }`,
			exp:  &Duration{math.MaxInt64},
		},
		{
			name: "Negative Float",
			req:  `{ "keep_alive": -3.14 }`,
			exp:  &Duration{math.MaxInt64},
		},
		{
			name: "Negative Integer String",
			req:  `{ "keep_alive": "-1m" }`,
			exp:  &Duration{math.MaxInt64},
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			var dec ChatRequest
			err := json.Unmarshal([]byte(test.req), &dec)
			require.NoError(t, err)

			assert.Equal(t, test.exp, dec.KeepAlive)
		})
	}
}

func TestDurationMarshalUnmarshal(t *testing.T) {
	tests := []struct {
		name     string
		input    time.Duration
		expected time.Duration
	}{
		{
			"negative duration",
			time.Duration(-1),
			time.Duration(math.MaxInt64),
		},
		{
			"positive duration",
			42 * time.Second,
			42 * time.Second,
		},
		{
			"another positive duration",
			42 * time.Minute,
			42 * time.Minute,
		},
		{
			"zero duration",
			time.Duration(0),
			time.Duration(0),
		},
		{
			"max duration",
			time.Duration(math.MaxInt64),
			time.Duration(math.MaxInt64),
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			b, err := json.Marshal(Duration{test.input})
			require.NoError(t, err)

			var d Duration
			err = json.Unmarshal(b, &d)
			require.NoError(t, err)

			assert.Equal(t, test.expected, d.Duration, "input %v, marshalled %v, got %v", test.input, string(b), d.Duration)
		})
	}
}
