package policy

import (
	"fmt"

	"git.sigsum.org/sigsum-lib-go/pkg/types"
)

type DefaultPolicy struct{}

// Verify checks if the cosigned tree head satisifies the policy "one log and
// a majority of witnesses".  Any unverifiable cosignatures are removed.
func (dp *DefaultPolicy) Verify(*types.CosignedTreeHead) error {
	return fmt.Errorf("TODO")
}

func (dp *DefaultPolicy) Logs() []Log {
	return []Log{
		Log{
			Name:   "Test log operated by ln5",
			LogURL: "https://poc.sigsum.org/glasswing-butterfly/sigsum/v0",
			PublicKey: types.PublicKey{
				74, 179, 210, 181,
				30, 71, 220, 157,
				228, 204, 228, 189,
				235, 169, 224, 134,
				34, 233, 58, 47,
				127, 137, 180, 203,
				119, 25, 127, 198,
				176, 4, 77, 231,
			},
			ShardStart: 1639579652,
			TrustUntil: 1648771200, // Apr 1 2022
		},
	}
}

func (dp *DefaultPolicy) Witnesses() []Witness {
	return []Witness{
		Witness{
			Name: "Test witness operated by rgdd",
			PublicKey: types.PublicKey{
				129, 45, 190, 240,
				21, 107, 7, 158,
				45, 4, 135, 71,
				178, 24, 156, 191,
				166, 79, 150, 226,
				32, 74, 23, 203,
				35, 203, 82, 128,
				128, 135, 21, 3,
			},
			TrustUntil: 1648771200, // Apr 1 2022
		},
	}
}

// ShardHint returns the smallest shard hint that all logs accept
func (dp *DefaultPolicy) ShardHint() uint64 {
	var shardHint uint64
	for _, l := range dp.Logs() {
		if l.ShardStart > shardHint {
			shardHint = l.ShardStart
		}
	}
	return shardHint
}