defmodule Steemex.DatabaseApi do

  def call(method, params) do
    Steemex.call(["database_api", method, params])
  end

  @doc"""
  Returns block data, accepts block height.

  Example response:
  ```
  %{"extensions" => [], "previous" => "002fefd79249e7d045bedbd5b18edef1d39e9ed8",
  "timestamp" => "2016-07-12T19:49:39",
  "transaction_merkle_root" => "b5a941121fb4872bb833b40e7958ad8da29eeea7",
  "transactions" => [%{"expiration" => "2016-07-12T19:49:51",
  "extensions" => [],
  "operations" => [["limit_order_create",
  %{"amount_to_sell" => "74.820 SBD",
  "expiration" => "1969-12-31T23:59:59", "fill_or_kill" => false,
  "min_to_receive" => "43.000 STEEM", "orderid" => 1468352976,
  "owner" => "scrawl"}]], "ref_block_num" => 61355,
  "ref_block_prefix" => 4242992740,
  "signatures" => ["20291edff748042820a8a49ae8f527d56a0fb47c52e936695622cc61105ab13d54503e4a64d22f9a4ce0b96ba348310e8275c9a5c3dbc9260b13f13d6ba840f388"]},
  %{"expiration" => "2016-07-12T19:49:48", "extensions" => [],
  "operations" => [["comment",
  %{"author" => "aziel",
  "body" => "...",
  "json_metadata" => "{\"tags\":[\"news\",\"CHexit\"]}",
  "parent_author" => "", "parent_permlink" => "news",
  "permlink" => "south-china-sea-china-defiant-as-tribunal-backs-philippines",
  "title" => "South China Sea: China defiant as tribunal backs Philippines"}],
  ["vote",
  %{"author" => "aziel",
  "permlink" => "south-china-sea-china-defiant-as-tribunal-backs-philippines",
  "voter" => "aziel", "weight" => 10000}]], "ref_block_num" => 61324,
  "ref_block_prefix" => 447820231,
  "signatures" => ["1f1aeb1bd7888da91d8efd6fc95232b17f4b9ded9c237c74e06f6532292678397076fb90c913a8ebe675118ae0977e31c191d5cef4601ea140b1bac72f8aeae9d3"]},
  %{"expiration" => "2016-07-12T19:49:51", "extensions" => [],
  "operations" => [["vote",
  %{"author" => "germanaure",
  "permlink" => "jeff-garzik-keynote-international-blockchain-real-estate-assn-conference",
  "voter" => "alexfortin", "weight" => 10000}]],
  "ref_block_num" => 61391, "ref_block_prefix" => 806313838,
  "signatures" => ["200c367860effe947ba19b8a65d9465bc4195df2809ed6a9274f45f1a827d042183dc88564b50dcb38d1cbdf2db8e6a6f3a3ad2810a67091bfcb1a76de602d45f2"]},
  %{"expiration" => "2016-07-12T19:49:51", "extensions" => [],
  "operations" => [["vote",
  %{"author" => "blakemiles84",
  "permlink" => "re-pfunk-meet-10-steem-superheroes-the-brave-men-and-women-powering-up-bigtime-20160712t073442453z",
  "voter" => "ajvest", "weight" => 10000}]], "ref_block_num" => 61377,
  "ref_block_prefix" => 4210414829,
  "signatures" => ["207f8d16a2993895cb827cd05a6f7367f10231a2af07e069ce64dcc01faf14d3127c4d924760eb78d6a8c6d3af0132235e2c2f198091ef9a5c03375174366d4b28"]}],
  "witness" => "roadscape",
  "witness_signature" => "2064f08ff9a8c6ca33a05847c06176f431e182c3aa2678d05c021914c7d1ad49a61641c3f0de5424281be5056e54e017cfa16934c4fecee04bb8395aa3bd202281"}
  ```
  """
  @spec get_block(integer) :: map
  def get_block(height) do
    call("get_block", [height])
  end

  def get_content(author, permlink) do
    call("get_content", [author, permlink])
  end

  @doc"""
  Returns account data. Accepts a list of up to 1000 account names

  Example response:
  ```
  [%{"recovery_account" => "steem", "guest_bloggers" => [],
  "posting_rewards" => 44618927, "created" => "2016-03-31T14:21:39",
  "last_bandwidth_update" => "2017-02-06T03:22:39", "to_withdraw" => 0,
  "last_active_proved" => "1970-01-01T00:00:00", "tags_usage" => [],
  "withdraw_routes" => 0, "last_account_update" => "2016-07-15T19:27:51",
  "sbd_last_interest_payment" => "2017-01-14T21:31:33", "json_metadata" => "",
  "active_challenged" => false, "new_average_bandwidth" => "6733326000",
  "vesting_balance" => "0.000 STEEM",
  "last_vote_time" => "2017-02-06T03:22:39", "post_history" => [],
  "blog_category" => %{}, "market_history" => [], "id" => 496,
  "vesting_shares" => "9835900508.693966 VESTS", "vote_history" => [],
  "reset_account" => "null", "sbd_balance" => "50.626 SBD",
  "last_post" => "2017-01-31T23:59:21", "lifetime_vote_count" => 0,
  "savings_sbd_last_interest_payment" => "1970-01-01T00:00:00",
  "mined" => false, "owner_challenged" => false,
  "vesting_withdraw_rate" => "0.000000 VESTS",
  "active" => %{"account_auths" => [],
  "key_auths" => [["STM7YtQZ7fwg7VE2U7wUPwdL2hWwtd3zR45XSPTk5dTirk7Mxud5z",
  1], ["STM7sw22HqsXbz7D2CmJfmMwt9rimtk518dRzsR1f8Cgw52dQR1pR", 1]],
  "weight_threshold" => 1}, "proxy" => "",
  "posting" => %{"account_auths" => [],
  "key_auths" => [["STM4yfYEjUoey4PLrKhnKFo1XKQZtZ77fWLnbGTr2mAUaSt2Sx9W4",
  1], ["STM7sw22HqsXbz7D2CmJfmMwt9rimtk518dRzsR1f8Cgw52dQR1pR", 1]],
  "weight_threshold" => 1}, "last_root_post" => "2016-07-27T15:44:03",
  "savings_balance" => "0.000 STEEM", "average_bandwidth" => 182717207,
  "last_account_recovery" => "1970-01-01T00:00:00",
  "next_vesting_withdrawal" => "1969-12-31T23:59:59", "can_vote" => true,
  "owner" => %{"account_auths" => [],
  "key_auths" => [["STM7H7yZfed2GqkgdLuYy3VVrmQLV4htbiu1WGouRHsjjD4Kq1MvQ",
  1], ["STM7sw22HqsXbz7D2CmJfmMwt9rimtk518dRzsR1f8Cgw52dQR1pR", 1]],
  "weight_threshold" => 1},
  "witness_votes" => ["abit", "arhag", "au1nethyb1", "bhuz", "bitcube",
  "blocktrades", "boatymcboatface", "charlieshrem", ...],
  "reputation" => "50203479326220", "post_count" => 236,
  "last_owner_proved" => "1970-01-01T00:00:00",
  "sbd_seconds_last_update" => "2017-01-21T09:27:12",
  "memo_key" => "STM7qtpUZfaHwyJk9ZwvXH3EsAxJcYWY4913Vj6xVWkskM8SRV2Ub",
  "new_average_market_bandwidth" => 2003955853, "name" => "dan",
  "withdrawn" => 0, ...},
  %{"recovery_account" => "steem", "guest_bloggers" => [],
  "posting_rewards" => 7480629, "created" => "2016-03-31T14:21:45",
  "last_bandwidth_update" => "2017-02-06T14:06:06", "to_withdraw" => 0,
  "last_active_proved" => "1970-01-01T00:00:00", "tags_usage" => [],
  "withdraw_routes" => 0, "last_account_update" => "2017-01-18T20:09:33",
  "sbd_last_interest_payment" => "2017-01-04T19:19:27",
  "json_metadata" => "{\"profile\":{\"profile_image\":\"https://pbs.twimg.com/profile_images/788308793675382784/qeMigCcx.jpg\",\"about\":\"Building on the Steem blockchain. CEO @steemit\",\"location\":\"A vision in  a dream.\",\"name\":\"ned\"}}",
  "active_challenged" => false, "new_average_bandwidth" => "170721511985",
  "vesting_balance" => "0.000 STEEM",
  "last_vote_time" => "2017-02-06T14:06:06", "post_history" => [],
  "blog_category" => %{}, "market_history" => [], "id" => 497,
  "vesting_shares" => "11920950909.517074 VESTS", "vote_history" => [],
  "reset_account" => "null", "sbd_balance" => "1004.474 SBD",
  "last_post" => "2017-02-03T21:32:42", "lifetime_vote_count" => 0,
  "savings_sbd_last_interest_payment" => "2017-01-01T19:19:27",
  "mined" => false, "owner_challenged" => false,
  "vesting_withdraw_rate" => "0.000000 VESTS",
  "active" => %{"account_auths" => [],
  "key_auths" => [["STM6NtAaJVX8Bk85jiphbrDk7swJRFdGGsqCuQtmajDvLFa6aXXjo",
  1]], "weight_threshold" => 1}, "proxy" => "",
  "posting" => %{"account_auths" => [],
  "key_auths" => [["STM6DXAK93uhbvAGKQaSGJG8QGCDyXxbS3GFFMHzqFw743XuUKUn7",
  1]], "weight_threshold" => 1}, "last_root_post" => "2017-01-29T05:46:57",
  "savings_balance" => "45555.000 STEEM", "average_bandwidth" => 148515414,
  "last_account_recovery" => "1970-01-01T00:00:00",
  "next_vesting_withdrawal" => "1969-12-31T23:59:59", "can_vote" => true,
  "owner" => %{"account_auths" => [],
  "key_auths" => [["STM88VeCav3dFi82QRfojbHjB78H7sj9e8SaymGg5gYw6nvzwgKy8",
  1]], "weight_threshold" => 1},
  "witness_votes" => ["aizensou", "anyx", "bacchist", "bitcoiner",
  "busy.witness", "chainsquad.com", "charlieshrem", "dragosroua", ...],
  "reputation" => "23004921512286", "post_count" => 449,
  "last_owner_proved" => "1970-01-01T00:00:00",
  "sbd_seconds_last_update" => "2017-01-30T15:32:00",
  "memo_key" => "STM5Wq24M2wbU9TJgcG9BLVtjVSmeQNX4hnivRBEubFHya5UrqUEH",
  "new_average_market_bandwidth" => "5789473524", "name" => "ned",
  "withdrawn" => 0, ...}]
  ```
  """
  @spec get_accounts([String.t]) :: [map]
  def get_accounts(accounts) do
    call("get_accounts", [accounts])
  end

  @doc"""
  Returns block header data. Accepts block height.

  Example response:
  ```
  %{"extensions" => [], "previous" => "0000000000000000000000000000000000000000",
  "timestamp" => "2016-03-24T16:05:00",
  "transaction_merkle_root" => "0000000000000000000000000000000000000000",
  "witness" => "initminer"}
  ```
  """
  @spec get_block_header(pos_integer) :: map
  def get_block_header(height) do
    call("get_block_header", [height])
  end

  @doc"""
  Unsurprisingly returns a map with dynamic global propeties.
  Example response:

  ```
  %{"average_block_size" => 1128, "confidential_sbd_supply" => "0.000 SBD",
  "confidential_supply" => "0.000 STEEM", "current_aslot" => 9185881,
  "current_reserve_ratio" => 20000, "current_sbd_supply" => "1127800.928 SBD",
  "current_supply" => "242006827.315 STEEM", "current_witness" => "blocktrades",
  "head_block_id" => "008b5de5311d81de95d99b81d5d42399e029964f",
  "head_block_number" => 9133541, "id" => 0,
  "last_irreversible_block_num" => 9133517,
  "max_virtual_bandwidth" => "5986734968066277376",
  "maximum_block_size" => 65536, "num_pow_witnesses" => 172,
  "participation_count" => 128,
  "recent_slots_filled" => "340282366920938463463374607431768211455",
  "sbd_interest_rate" => 300, "sbd_print_rate" => 7166,
  "time" => "2017-02-06T14:54:03", "total_pow" => 437187,
  "total_reward_fund_steem" => "57923.397 STEEM",
  "total_reward_shares2" => "1214871589134524977954294837379",
  "total_vesting_fund_steem" => "204618201.470 STEEM",
  "total_vesting_shares" => "426476786270.109616 VESTS",
  "virtual_supply" => "249126070.673 STEEM", "vote_regeneration_per_day" => 40}
  ```
  """
  @spec get_dynamic_global_properties() :: map
  def get_dynamic_global_properties do
    call("get_dynamic_global_properties", [])
  end

  @doc"""
  Unsurprisingly returns a map with chain propeties.
  Example result:
  ```
  %{"account_creation_fee" => "30.000 STEEM", "maximum_block_size" => 65536,
  "sbd_interest_rate" => 300}
  ```
  """
  @spec get_chain_properties() :: map
  def get_chain_properties do
    call("get_chain_properties", [])
  end

  @doc"""
  Returns feed history
  Example response:
  ```
  %{"current_median_history" => %{"base" => "0.160 SBD",
  "quote" => "1.010 STEEM"}, "id" => 0,
  "price_history" => [%{"base" => "0.166 SBD", "quote" => "1.020 STEEM"},
  %{"base" => "0.162 SBD", "quote" => "1.000 STEEM"},
  %{"base" => "0.165 SBD", "quote" => "1.020 STEEM"},
  %{"base" => "0.160 SBD", "quote" => "1.000 STEEM"},
  %{"base" => "0.162 SBD", "quote" => "1.020 STEEM"},
  %{"base" => "0.163 SBD", ...}, %{...}, ...]}
  ```
  """
  @spec get_feed_history() :: map
  def get_feed_history do
    call("get_feed_history", [])
  end

  @doc"""
  Returns node client config

  Example response:
  ```
  %{"STEEMIT_MINER_ACCOUNT" => "miners", "STEEMIT_MAX_AUTHORITY_MEMBERSHIP" => 10,
  "STEEMIT_MIN_CONTENT_REWARD" => "1.000 STEEM",
  "STEEMIT_BLOCKCHAIN_HARDFORK_VERSION" => "0.16.0",
  "STEEMIT_CURATE_APR_PERCENT" => 3875, "VESTS_SYMBOL" => "91621639411206",
  "STEEMIT_MIN_LIQUIDITY_REWARD" => "1200.000 STEEM",
  "STEEMIT_1_PERCENT" => 100, "STEEMIT_MINING_TIME" => "2016-03-24T17:00:00",
  "STEEMIT_PRODUCER_APR_PERCENT" => 750, "STEEMIT_FEED_INTERVAL_BLOCKS" => 1200,
  "STEEM_SYMBOL" => "84959911236355", "STEEMIT_MAX_MEMO_SIZE" => 2048,
  "STEEMIT_MAX_RATION_DECAY_RATE" => 1000000, "STEEMIT_INIT_SUPPLY" => 0,
  "STEEMIT_MAX_RUNNER_WITNESSES" => 1,
  "STEEMIT_REVERSE_AUCTION_WINDOW_SECONDS" => 1800,
  "STEEMIT_VOTE_REGENERATION_SECONDS" => 432000,
  "STEEMIT_MAX_SIG_CHECK_DEPTH" => 2, "STEEMIT_MAX_FEED_AGE" => "604800000000",
  "STEEMIT_BLOCKS_PER_HOUR" => 1200, "STEEMIT_VESTING_WITHDRAW_INTERVALS" => 13,
  "STEEMIT_CONVERSION_DELAY" => "302400000000",
  "STEEMIT_MAX_MINER_WITNESSES" => 1,
  "STEEMIT_BANDWIDTH_AVERAGE_WINDOW_SECONDS" => 604800,
  "STEEMIT_LIQUIDITY_REWARD_PERIOD_SEC" => 3600,
  "STEEMIT_BLOCKS_PER_DAY" => 28800,
  "STEEMIT_MAX_TIME_UNTIL_EXPIRATION" => 3600,
  "STEEMIT_INIT_TIME" => "1970-01-01T00:00:00",
  "STEEMIT_LIQUIDITY_TIMEOUT_SEC" => "604800000000",
  "STEEMIT_MIN_BLOCK_SIZE_LIMIT" => 65536, "IS_TEST_NET" => false,
  "STEEMIT_DEFAULT_SBD_INTEREST_RATE" => 1000,
  "STEEMIT_MIN_ACCOUNT_CREATION_FEE" => 1, "STEEMIT_NULL_ACCOUNT" => "null",
  "STEEMIT_MAX_ACCOUNT_WITNESS_VOTES" => 30,
  "STEEMIT_MAX_VOTED_WITNESSES" => 19, "STEEMIT_MIN_UNDO_HISTORY" => 10,
  "STEEMIT_ADDRESS_PREFIX" => "STM",
  "STEEMIT_HARDFORK_REQUIRED_WITNESSES" => 17,
  "STEEMIT_MIN_TRANSACTION_EXPIRATION_LIMIT" => 15,
  "STEEMIT_CONTENT_APR_PERCENT" => 3875,
  "STEEMIT_APR_PERCENT_SHIFT_PER_ROUND" => 83,
  "STEEMIT_START_MINER_VOTING_BLOCK" => 864000,
  "STEEMIT_SECONDS_PER_YEAR" => 31536000,
  "STEEMIT_MIN_PRODUCER_REWARD" => "1.000 STEEM",
  "STEEMIT_LIQUIDITY_REWARD_BLOCKS" => 1200,
  "STEEMIT_CASHOUT_WINDOW_SECONDS" => 43200,
  "GRAPHENE_CURRENT_DB_VERSION" => "GPH2.4", "STEEMIT_MINER_PAY_PERCENT" => 100,
  ...}
  ```
  """
  @spec get_config() :: map
  def get_config() do
    call("get_config", [])
  end

  @doc"""
  Returns current median history price.
  Example response:
  ```
  %{"base" => "0.160 SBD", "quote" => "1.010 STEEM"}
  ```
  """
  @spec get_current_median_history_price() :: map
  def get_current_median_history_price do
    call("get_current_median_history_price", [])
  end

  # ACCOUNTS
  @doc"""
  Get account count
  Example response: 25290
  """
  @spec get_account_count() :: integer
  def get_account_count() do
    call("get_account_count", [])
  end

  @doc"""
  Returns account operations history
  Example response:
  ```
  [[15294,
    %{"block" => 8903687,
      "op" => ["author_reward",
       %{"author" => "ontofractal",
         "permlink" => "comparison-of-golos-and-steem-statistics-for-first-100-days",
         "sbd_payout" => "7.770 SBD", "steem_payout" => "33.782 STEEM",
         "vesting_payout" => "180601.344672 VESTS"}], "op_in_trx" => 1,
      "timestamp" => "2017-01-29T15:09:45",
      "trx_id" => "0000000000000000000000000000000000000000", "trx_in_block" => 6,
      "virtual_op" => 0}],
   [15295,
    %{"block" => 8904511,
      "op" => ["vote",
       %{"author" => "ontofractal",
         "permlink" => "comparison-of-golos-and-steem-statistics-for-first-100-days",
         "voter" => "hipster", "weight" => 10000}], "op_in_trx" => 0,
      "timestamp" => "2017-01-29T15:50:57",
      "trx_id" => "83615aab4f2ff416ac178bcb3bab50ffbe585745", "trx_in_block" => 1,
      "virtual_op" => 0}],
      ...]
  ```
  """
  @spec get_account_history(String.t, integer, integer) :: [map]
  def get_account_history(name, from, limit) do
    call("get_account_history", [name, from, limit])
  end

  @doc"""
  Lookup accounts
  Example response:
  ```
  ["steempunks", "steempuns", "steempuppy", "steempuzzler", "steempy", "steemq", "steemq-blog", "steemq-funds", "steemq376q9", "steemquebec"]
  ```
  """
  @spec lookup_accounts(String.t,integer) :: [String.t]
  def lookup_accounts(lower_bound_name, limit) do
    call("lookup_accounts", [lower_bound_name,  limit])
  end

  @doc"""
  Returns list of maps of account data.

  Example response:
  ```
  [%{"recovery_account" => "steem", "posting_rewards" => 4950108,
     "created" => "2016-08-06T17:34:18",
     "last_bandwidth_update" => "2017-01-31T13:03:36",
     "to_withdraw" => "5188624789449",
     "last_active_proved" => "1970-01-01T00:00:00", "withdraw_routes" => 0,
     "last_account_update" => "2016-12-03T12:59:33",
     "sbd_last_interest_payment" => "2017-01-18T22:18:36",
     "json_metadata" => "{\"profile\":{\"profile_image\":\"https://upload.wikimedia.org/wikipedia/commons/8/81/Buddhabrot-1000I-8000.jpg\",\"name\":\"ontofractal\",\"website\":\"http://twitter.com/ontofractal\"}}",
     "active_challenged" => false, "new_average_bandwidth" => "8259705539",
     "last_vote_time" => "2017-01-31T13:03:36", "id" => 48156,
     "vesting_shares" => "5012094.675002 VESTS", "reset_account" => "null",
     "sbd_balance" => "8.253 SBD", "last_post" => "2017-01-28T14:53:06",
     "lifetime_vote_count" => 0,
     "savings_sbd_last_interest_payment" => "1970-01-01T00:00:00",
     "mined" => false, "owner_challenged" => false,
     "vesting_withdraw_rate" => "399124.983803 VESTS",
     "active" => %{"account_auths" => [],
       "key_auths" => [["STM8NV2JNwtcTSCDSJDgr69PFueGTvnvGC2F8HPSyUxFWrnp9ATY6",
         1]], "weight_threshold" => 1}, "proxy" => "",
     "posting" => %{"account_auths" => [],
       "key_auths" => [["STM6qg3gEEkSz4i1T9WpjSxjFrVc6fNEps1QpvxsDCMATiaL5aRzx",
         1]], "weight_threshold" => 1}, "last_root_post" => "2017-01-28T13:54:48",
     "savings_balance" => "0.000 STEEM", "average_bandwidth" => 369651031,
     "last_account_recovery" => "1970-01-01T00:00:00",
     "next_vesting_withdrawal" => "2017-02-11T16:44:30", "can_vote" => true,
     "owner" => %{"account_auths" => [],
       "key_auths" => [["STM6Ms4HrGMCPsq3yoytJc8TEKuQb1Bk9HRxjUSa3wtyhnpA4fJZV",
         1]], "weight_threshold" => 1}, "post_count" => 240,
     "last_owner_proved" => "1970-01-01T00:00:00",
     "sbd_seconds_last_update" => "2017-02-03T19:08:00",
     "memo_key" => "STM5frWAw3yukawhSEnQ7zK7N1LWM77JzjJvzAZx5JRMgPkoddXTv",
     "new_average_market_bandwidth" => 2748776576, "name" => "ontofractal",
     "withdrawn" => "1197374951409", "savings_withdraw_requests" => 0,
     "savings_sbd_seconds" => "0", "last_owner_update" => "1970-01-01T00:00:00",
     "proxied_vsf_votes" => [0, 0, 0, 0, 0, 0, ...],
     "sbd_seconds" => "5772530808", "savings_sbd_balance" => "0.000 SBD",
     "post_bandwidth" => 10000, "curation_rewards" => 1713,
     "witnesses_voted_for" => 1, "comment_count" => 0, ...}]
  ```
  """
  @spec lookup_account_names([String.t]) :: [map]
  def lookup_account_names(account_names) do
    call("lookup_account_names", [account_names])
  end

  @doc"""
  Returns witness schedule

  Example response:
  ```
  %{"current_shuffled_witnesses" => "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",
    "current_virtual_time" => "149879486709481251464225589", "id" => 0,
    "majority_version" => "0.16.0",
    "median_props" => %{"account_creation_fee" => "25.000 STEEM",
      "maximum_block_size" => 65536, "sbd_interest_rate" => 300},
    "miner_weight" => 1, "next_shuffle_block_num" => 9133929,
    "num_scheduled_witnesses" => 21, "timeshare_weight" => 5, "top19_weight" => 1,
    "witness_pay_normalization_factor" => 25}
  ```
  """
  @spec get_witness_schedule() :: map
  def get_witness_schedule() do
   call("get_witness_schedule", [])
  end


  @doc"""
  Gets hardfork version

  Example response: `"0.16.0"`
  """
  @spec get_hardfork_version() :: String.t
  def get_hardfork_version() do
   call("get_hardfork_version", [])
  end


  @doc"""
  Get next scheduled hardfork time

  Example result: `%{"hf_version" => "0.16.0", "live_time" => "2016-12-06T16:00:00"}`
  """
  @spec get_next_scheduled_hardfork() :: map
  def get_next_scheduled_hardfork() do
   call("get_next_scheduled_hardfork", [])
  end

  # UTILITY
  defp call_db(method, params) do
    call( method, params)
  end
end