package envconfig

import (
	"math"
	"testing"
	"time"

	"github.com/google/go-cmp/cmp"
	"github.com/stretchr/testify/require"
)

func TestSmoke(t *testing.T) {
	t.Setenv("OLLAMA_DEBUG", "")
	require.False(t, Debug())

	t.Setenv("OLLAMA_DEBUG", "false")
	require.False(t, Debug())

	t.Setenv("OLLAMA_DEBUG", "1")
	require.True(t, Debug())

	t.Setenv("OLLAMA_FLASH_ATTENTION", "1")
	require.True(t, FlashAttention())
}

func TestHost(t *testing.T) {
	cases := map[string]struct {
		value  string
		expect string
	}{
		"empty":               {"", "127.0.0.1:11434"},
		"only address":        {"1.2.3.4", "1.2.3.4:11434"},
		"only port":           {":1234", ":1234"},
		"address and port":    {"1.2.3.4:1234", "1.2.3.4:1234"},
		"hostname":            {"example.com", "example.com:11434"},
		"hostname and port":   {"example.com:1234", "example.com:1234"},
		"zero port":           {":0", ":0"},
		"too large port":      {":66000", ":11434"},
		"too small port":      {":-1", ":11434"},
		"ipv6 localhost":      {"[::1]", "[::1]:11434"},
		"ipv6 world open":     {"[::]", "[::]:11434"},
		"ipv6 no brackets":    {"::1", "[::1]:11434"},
		"ipv6 + port":         {"[::1]:1337", "[::1]:1337"},
		"extra space":         {" 1.2.3.4 ", "1.2.3.4:11434"},
		"extra quotes":        {"\"1.2.3.4\"", "1.2.3.4:11434"},
		"extra space+quotes":  {" \" 1.2.3.4 \" ", "1.2.3.4:11434"},
		"extra single quotes": {"'1.2.3.4'", "1.2.3.4:11434"},
	}

	for name, tt := range cases {
		t.Run(name, func(t *testing.T) {
			t.Setenv("OLLAMA_HOST", tt.value)
			if host := Host(); host.Host != tt.expect {
				t.Errorf("%s: expected %s, got %s", name, tt.expect, host.Host)
			}
		})
	}
}

func TestOrigins(t *testing.T) {
	cases := []struct {
		value  string
		expect []string
	}{
		{"", []string{
			"http://localhost",
			"https://localhost",
			"http://localhost:*",
			"https://localhost:*",
			"http://127.0.0.1",
			"https://127.0.0.1",
			"http://127.0.0.1:*",
			"https://127.0.0.1:*",
			"http://0.0.0.0",
			"https://0.0.0.0",
			"http://0.0.0.0:*",
			"https://0.0.0.0:*",
			"app://*",
			"file://*",
			"tauri://*",
		}},
		{"http://10.0.0.1", []string{
			"http://10.0.0.1",
			"http://localhost",
			"https://localhost",
			"http://localhost:*",
			"https://localhost:*",
			"http://127.0.0.1",
			"https://127.0.0.1",
			"http://127.0.0.1:*",
			"https://127.0.0.1:*",
			"http://0.0.0.0",
			"https://0.0.0.0",
			"http://0.0.0.0:*",
			"https://0.0.0.0:*",
			"app://*",
			"file://*",
			"tauri://*",
		}},
		{"http://172.16.0.1,https://192.168.0.1", []string{
			"http://172.16.0.1",
			"https://192.168.0.1",
			"http://localhost",
			"https://localhost",
			"http://localhost:*",
			"https://localhost:*",
			"http://127.0.0.1",
			"https://127.0.0.1",
			"http://127.0.0.1:*",
			"https://127.0.0.1:*",
			"http://0.0.0.0",
			"https://0.0.0.0",
			"http://0.0.0.0:*",
			"https://0.0.0.0:*",
			"app://*",
			"file://*",
			"tauri://*",
		}},
		{"http://totally.safe,http://definitely.legit", []string{
			"http://totally.safe",
			"http://definitely.legit",
			"http://localhost",
			"https://localhost",
			"http://localhost:*",
			"https://localhost:*",
			"http://127.0.0.1",
			"https://127.0.0.1",
			"http://127.0.0.1:*",
			"https://127.0.0.1:*",
			"http://0.0.0.0",
			"https://0.0.0.0",
			"http://0.0.0.0:*",
			"https://0.0.0.0:*",
			"app://*",
			"file://*",
			"tauri://*",
		}},
	}
	for _, tt := range cases {
		t.Run(tt.value, func(t *testing.T) {
			t.Setenv("OLLAMA_ORIGINS", tt.value)

			if diff := cmp.Diff(Origins(), tt.expect); diff != "" {
				t.Errorf("%s: mismatch (-want +got):\n%s", tt.value, diff)
			}
		})
	}
}

func TestBool(t *testing.T) {
	cases := map[string]struct {
		value  string
		expect bool
	}{
		"empty":     {"", false},
		"true":      {"true", true},
		"false":     {"false", false},
		"1":         {"1", true},
		"0":         {"0", false},
		"random":    {"random", true},
		"something": {"something", true},
	}

	for name, tt := range cases {
		t.Run(name, func(t *testing.T) {
			t.Setenv("OLLAMA_BOOL", tt.value)
			if b := Bool("OLLAMA_BOOL"); b() != tt.expect {
				t.Errorf("%s: expected %t, got %t", name, tt.expect, b())
			}
		})
	}
}

func TestKeepAlive(t *testing.T) {
	cases := map[string]time.Duration{
		"":       5 * time.Minute,
		"1s":     time.Second,
		"1m":     time.Minute,
		"1h":     time.Hour,
		"5m0s":   5 * time.Minute,
		"1h2m3s": 1*time.Hour + 2*time.Minute + 3*time.Second,
		"0":      time.Duration(0),
		"60":     60 * time.Second,
		"120":    2 * time.Minute,
		"3600":   time.Hour,
		"-0":     time.Duration(0),
		"-1":     time.Duration(math.MaxInt64),
		"-1m":    time.Duration(math.MaxInt64),
		// invalid values
		" ":   5 * time.Minute,
		"???": 5 * time.Minute,
		"1d":  5 * time.Minute,
		"1y":  5 * time.Minute,
		"1w":  5 * time.Minute,
	}

	for tt, expect := range cases {
		t.Run(tt, func(t *testing.T) {
			t.Setenv("OLLAMA_KEEP_ALIVE", tt)
			if actual := KeepAlive(); actual != expect {
				t.Errorf("%s: expected %s, got %s", tt, expect, actual)
			}
		})
	}
}