package rpc

import (
	"net/http"

	. "github.com/tendermint/tendermint/block"
	. "github.com/tendermint/tendermint/common"
)

type BlockchainInfoResponse struct {
	LastHeight uint
	BlockMetas []*BlockMeta
}

func BlockchainInfoHandler(w http.ResponseWriter, r *http.Request) {
	minHeight, _ := GetParamUint(r, "min_height")
	maxHeight, _ := GetParamUint(r, "max_height")
	if maxHeight == 0 {
		maxHeight = blockStore.Height()
	} else {
		maxHeight = MinUint(blockStore.Height(), maxHeight)
	}
	if minHeight == 0 {
		minHeight = MaxUint(1, MinUint(maxHeight-20, 1))
	}

	blockMetas := []*BlockMeta{}
	for height := minHeight; height <= maxHeight; height++ {
		blockMeta := blockStore.LoadBlockMeta(height)
		blockMetas = append(blockMetas, blockMeta)
	}

	res := BlockchainInfoResponse{
		LastHeight: blockStore.Height(),
		BlockMetas: blockMetas,
	}

	WriteAPIResponse(w, API_OK, res)
	return
}

//-----------------------------------------------------------------------------

func BlockHandler(w http.ResponseWriter, r *http.Request) {
	height, _ := GetParamUint(r, "height")
	if height == 0 {
		WriteAPIResponse(w, API_INVALID_PARAM, "height must be greater than 1")
		return
	}
	if height > blockStore.Height() {
		WriteAPIResponse(w, API_INVALID_PARAM, "height must be less than the current blockchain height")
		return
	}

	block := blockStore.LoadBlock(height)
	WriteAPIResponse(w, API_OK, block)
	return
}