package miner

import (
	"context"
	"errors"
	"strings"
	"testing"

	"crypto-miner-agent/config"
)

func TestTierOrchestratorTryChainSequentialFailuresThenSuccess(t *testing.T) {
	var order []LOTLTier
	fail := errors.New("container blocked")
	o := NewTierOrchestrator(config.RuntimeConfig{
		BuiltinConfig: config.BuiltinConfig{Wallet: "xmr-wallet-abc"},
	}, EnvironmentProbes{Docker: true}, MiningTierPolicy{
		TierOrder: []LOTLTier{TierContainer, TierCPUInprocess},
	}, TierHooks{
		StartContainer: func() error {
			order = append(order, TierContainer)
			return fail
		},
		StartInProcess: func() error {
			order = append(order, TierCPUInprocess)
			return nil
		},
	}, nil)

	tier, err := o.TryChain(context.Background())
	if err != nil {
		t.Fatalf("TryChain: %v", err)
	}
	if tier != TierCPUInprocess {
		t.Fatalf("active=%q want cpu_inprocess", tier)
	}
	if len(order) != 2 || order[0] != TierContainer || order[1] != TierCPUInprocess {
		t.Fatalf("invoke order=%v", order)
	}
	report := o.Report()
	if len(report.Attempts) < 2 {
		t.Fatalf("attempts=%v", report.Attempts)
	}
	if !report.Attempts[0].OK && report.Attempts[0].Tier != TierContainer {
		t.Fatalf("first attempt=%+v", report.Attempts[0])
	}
	if !report.Attempts[len(report.Attempts)-1].OK {
		t.Fatalf("last attempt should succeed: %+v", report.Attempts[len(report.Attempts)-1])
	}
	for _, a := range report.Attempts {
		if a.Wallet != "xmr-wallet-abc" {
			t.Fatalf("wallet mismatch in %+v", a)
		}
	}
}

func TestTierOrchestratorChainExhausted(t *testing.T) {
	o := NewTierOrchestrator(config.RuntimeConfig{}, EnvironmentProbes{}, MiningTierPolicy{
		TierOrder: []LOTLTier{TierCPUInprocess},
	}, TierHooks{
		StartInProcess: func() error { return errors.New("no cpu") },
	}, nil)

	_, err := o.TryChain(context.Background())
	if err == nil || err.Error() != "no cpu" {
		t.Fatalf("got err=%v", err)
	}
	if !o.ChainExhausted() {
		t.Fatal("expected chain exhausted")
	}
}

func TestTierOrchestratorSetHashrateEmitsReport(t *testing.T) {
	var events []string
	o := NewTierOrchestrator(config.RuntimeConfig{
		BuiltinConfig: config.BuiltinConfig{Wallet: "w"},
	}, EnvironmentProbes{}, DefaultMiningTierPolicy(), TierHooks{}, func(report TierReport, eventType string) {
		events = append(events, eventType)
		if report.MiningHashrate != 1234.5 {
			t.Fatalf("hashrate=%v", report.MiningHashrate)
		}
	})
	o.SetHashrate(1234.5)
	if len(events) != 1 || events[0] != "tier_report" {
		t.Fatalf("events=%v", events)
	}
}

func TestTierOrchestratorTryGPUAddonSkippedWithoutWebGPU(t *testing.T) {
	gpuStarted := false
	o := NewTierOrchestrator(config.RuntimeConfig{
		BuiltinConfig: config.BuiltinConfig{Wallet: "w", GPUEnabled: true, RVNWallet: "rvn"},
	}, EnvironmentProbes{GPU: true}, MiningTierPolicy{
		TierOrder: []LOTLTier{TierCPUInprocess, TierGPUSubprocess},
	}, TierHooks{
		StartInProcess: func() error { return nil },
		StartGPU: func() error {
			gpuStarted = true
			return nil
		},
		IsGPUSupported: func() bool { return true },
	}, nil)

	tier, err := o.TryChain(context.Background())
	if err != nil {
		t.Fatalf("TryChain: %v", err)
	}
	if tier != TierCPUInprocess {
		t.Fatalf("active=%q", tier)
	}
	if gpuStarted {
		t.Fatal("gpu should not start without webgpu/compute probe")
	}
	report := o.Report()
	foundSkip := false
	for _, a := range report.Attempts {
		if a.Tier == TierGPUSubprocess && !a.OK {
			foundSkip = true
		}
	}
	if !foundSkip {
		t.Fatalf("expected gpu skip attempt, got %v", report.Attempts)
	}
}

func TestTierOrchestratorReportsFailedAttempt(t *testing.T) {
	o := NewTierOrchestrator(config.RuntimeConfig{}, EnvironmentProbes{Docker: true}, MiningTierPolicy{
		TierOrder: []LOTLTier{TierContainer, TierCPUInprocess},
	}, TierHooks{
		StartContainer: func() error { return errors.New("av blocked") },
		StartInProcess: func() error { return nil },
	}, nil)

	if _, err := o.TryChain(context.Background()); err != nil {
		t.Fatalf("TryChain: %v", err)
	}
	foundFailed := false
	for _, a := range o.Report().Attempts {
		if a.Tier == TierContainer && !a.OK && strings.Contains(a.Error, "av blocked") {
			foundFailed = true
		}
	}
	if !foundFailed {
		t.Fatalf("expected failed container attempt, got %v", o.Report().Attempts)
	}
}