package cli

import (
	"fmt"
	"strings"

	"github.com/spf13/cobra"
	"github.com/spf13/viper"

	"github.com/cosmos/cosmos-sdk/client/context"
	"github.com/cosmos/cosmos-sdk/client/flags"
	"github.com/cosmos/cosmos-sdk/codec"
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/version"

	"github.com/kava-labs/kava/x/incentive/types"
)

const (
	flagOwner    = "owner"
	flagType     = "type"
	flagUnsynced = "unsynced"
	flagDenom    = "denom"
)

// GetQueryCmd returns the cli query commands for the incentive module
func GetQueryCmd(queryRoute string, cdc *codec.Codec) *cobra.Command {
	incentiveQueryCmd := &cobra.Command{
		Use:   types.ModuleName,
		Short: "Querying commands for the incentive module",
	}

	incentiveQueryCmd.AddCommand(flags.GetCommands(
		queryParamsCmd(queryRoute, cdc),
		queryRewardsCmd(queryRoute, cdc),
		queryRewardFactorsCmd(queryRoute, cdc),
	)...)

	return incentiveQueryCmd
}

func queryRewardsCmd(queryRoute string, cdc *codec.Codec) *cobra.Command {
	cmd := &cobra.Command{
		Use:   "rewards",
		Short: "query claimable rewards",
		Long: strings.TrimSpace(
			fmt.Sprintf(`Query rewards with optional flags for owner and type

			Example:
			$ %s query %s rewards
			$ %s query %s rewards --owner kava15qdefkmwswysgg4qxgqpqr35k3m49pkx2jdfnw
			$ %s query %s rewards --type hard
			$ %s query %s rewards --type usdx-minting
			$ %s query %s rewards --type delegator
			$ %s query %s rewards --type hard --owner kava15qdefkmwswysgg4qxgqpqr35k3m49pkx2jdfnw
			$ %s query %s rewards --type hard --unsynced true
			`,
				version.ClientName, types.ModuleName, version.ClientName, types.ModuleName,
				version.ClientName, types.ModuleName, version.ClientName, types.ModuleName,
				version.ClientName, types.ModuleName, version.ClientName, types.ModuleName,
				version.ClientName, types.ModuleName)),
		Args: cobra.NoArgs,
		RunE: func(cmd *cobra.Command, args []string) error {
			cliCtx := context.NewCLIContext().WithCodec(cdc)

			page := viper.GetInt(flags.FlagPage)
			limit := viper.GetInt(flags.FlagLimit)
			strOwner := viper.GetString(flagOwner)
			strType := viper.GetString(flagType)
			boolUnsynced := viper.GetBool(flagUnsynced)

			// Prepare params for querier
			owner, err := sdk.AccAddressFromBech32(strOwner)
			if err != nil {
				return err
			}

			switch strings.ToLower(strType) {
			case "hard":
				var claims types.HardLiquidityProviderClaims
				if boolUnsynced {
					params := types.NewQueryHardRewardsUnsyncedParams(page, limit, owner)
					claims, err = executeHardRewardsUnsyncedQuery(queryRoute, cdc, cliCtx, params)
					if err != nil {
						return err
					}
				} else {
					params := types.NewQueryHardRewardsParams(page, limit, owner)
					claims, err = executeHardRewardsQuery(queryRoute, cdc, cliCtx, params)
					if err != nil {
						return err
					}
				}
				return cliCtx.PrintOutput(claims)
			case "usdx-minting":
				var claims types.USDXMintingClaims
				if boolUnsynced {
					params := types.NewQueryUSDXMintingRewardsUnsyncedParams(page, limit, owner)
					claims, err = executeUSDXMintingRewardsUnsyncedQuery(queryRoute, cdc, cliCtx, params)
					if err != nil {
						return err
					}
				} else {
					params := types.NewQueryUSDXMintingRewardsParams(page, limit, owner)
					claims, err = executeUSDXMintingRewardsQuery(queryRoute, cdc, cliCtx, params)
					if err != nil {
						return err
					}
				}
				return cliCtx.PrintOutput(claims)
			case "delegator":
				var claims types.DelegatorClaims
				if boolUnsynced {
					params := types.NewQueryDelegatorRewardsUnsyncedParams(page, limit, owner)
					claims, err = executeDelegatorRewardsUnsyncedQuery(queryRoute, cdc, cliCtx, params)
					if err != nil {
						return err
					}
				} else {
					params := types.NewQueryDelegatorRewardsParams(page, limit, owner)
					claims, err = executeDelegatorRewardsQuery(queryRoute, cdc, cliCtx, params)
					if err != nil {
						return err
					}
				}
				return cliCtx.PrintOutput(claims)
			default:
				var hardClaims types.HardLiquidityProviderClaims
				var usdxMintingClaims types.USDXMintingClaims
				var delegatorClaims types.DelegatorClaims
				if boolUnsynced {
					paramsHard := types.NewQueryHardRewardsUnsyncedParams(page, limit, owner)
					hardClaims, err = executeHardRewardsUnsyncedQuery(queryRoute, cdc, cliCtx, paramsHard)
					if err != nil {
						return err
					}
					paramsUSDXMinting := types.NewQueryUSDXMintingRewardsUnsyncedParams(page, limit, owner)
					usdxMintingClaims, err = executeUSDXMintingRewardsUnsyncedQuery(queryRoute, cdc, cliCtx, paramsUSDXMinting)
					if err != nil {
						return err
					}
					paramsDelegator := types.NewQueryDelegatorRewardsUnsyncedParams(page, limit, owner)
					delegatorClaims, err = executeDelegatorRewardsUnsyncedQuery(queryRoute, cdc, cliCtx, paramsDelegator)
					if err != nil {
						return err
					}
				} else {
					paramsHard := types.NewQueryHardRewardsParams(page, limit, owner)
					hardClaims, err = executeHardRewardsQuery(queryRoute, cdc, cliCtx, paramsHard)
					if err != nil {
						return err
					}
					paramsUSDXMinting := types.NewQueryUSDXMintingRewardsParams(page, limit, owner)
					usdxMintingClaims, err = executeUSDXMintingRewardsQuery(queryRoute, cdc, cliCtx, paramsUSDXMinting)
					if err != nil {
						return err
					}
					paramsDelegator := types.NewQueryDelegatorRewardsParams(page, limit, owner)
					delegatorClaims, err = executeDelegatorRewardsQuery(queryRoute, cdc, cliCtx, paramsDelegator)
					if err != nil {
						return err
					}
				}
				if len(hardClaims) > 0 {
					cliCtx.PrintOutput(hardClaims)
				}
				if len(usdxMintingClaims) > 0 {
					cliCtx.PrintOutput(usdxMintingClaims)
				}
				if len(delegatorClaims) > 0 {
					cliCtx.PrintOutput(delegatorClaims)
				}
			}
			return nil
		},
	}
	cmd.Flags().String(flagOwner, "", "(optional) filter by owner address")
	cmd.Flags().String(flagType, "", "(optional) filter by reward type")
	cmd.Flags().String(flagUnsynced, "", "(optional) get unsynced claims")
	cmd.Flags().Int(flags.FlagPage, 1, "pagination page rewards of to to query for")
	cmd.Flags().Int(flags.FlagLimit, 100, "pagination limit of rewards to query for")
	return cmd
}

func queryParamsCmd(queryRoute string, cdc *codec.Codec) *cobra.Command {
	return &cobra.Command{
		Use:   "params",
		Short: "get the incentive module parameters",
		Long:  "Get the current global incentive module parameters.",
		Args:  cobra.NoArgs,
		RunE: func(cmd *cobra.Command, args []string) error {
			cliCtx := context.NewCLIContext().WithCodec(cdc)

			// Query
			route := fmt.Sprintf("custom/%s/%s", queryRoute, types.QueryGetParams)
			res, height, err := cliCtx.QueryWithData(route, nil)
			if err != nil {
				return err
			}
			cliCtx = cliCtx.WithHeight(height)

			// Decode and print results
			var params types.Params
			if err := cdc.UnmarshalJSON(res, &params); err != nil {
				return fmt.Errorf("failed to unmarshal params: %w", err)
			}
			return cliCtx.PrintOutput(params)
		},
	}
}

func queryRewardFactorsCmd(queryRoute string, cdc *codec.Codec) *cobra.Command {
	cmd := &cobra.Command{
		Use:   "reward-factors",
		Short: "get current global reward factors",
		Long: strings.TrimSpace(`get current global reward factors:

		Example:
		$ kvcli q hard reward-factors
		$ kvcli q hard reward-factors --denom bnb`,
		),
		Args: cobra.NoArgs,
		RunE: func(cmd *cobra.Command, args []string) error {
			cliCtx := context.NewCLIContext().WithCodec(cdc)

			denom := viper.GetString(flagDenom)

			// Construct query with params
			params := types.NewQueryRewardFactorsParams(denom)
			bz, err := cdc.MarshalJSON(params)
			if err != nil {
				return err
			}

			// Execute query
			route := fmt.Sprintf("custom/%s/%s", queryRoute, types.QueryGetRewardFactors)
			res, height, err := cliCtx.QueryWithData(route, bz)
			if err != nil {
				return err
			}
			cliCtx = cliCtx.WithHeight(height)

			// Decode and print results
			var rewardFactors types.RewardFactors
			if err := cdc.UnmarshalJSON(res, &rewardFactors); err != nil {
				return fmt.Errorf("failed to unmarshal reward factors: %w", err)
			}
			return cliCtx.PrintOutput(rewardFactors)
		},
	}
	cmd.Flags().String(flagDenom, "", "(optional) filter reward factors by denom")
	return cmd
}

func executeHardRewardsQuery(queryRoute string, cdc *codec.Codec, cliCtx context.CLIContext,
	params types.QueryHardRewardsParams) (types.HardLiquidityProviderClaims, error) {
	bz, err := cdc.MarshalJSON(params)
	if err != nil {
		return types.HardLiquidityProviderClaims{}, err
	}

	route := fmt.Sprintf("custom/%s/%s", queryRoute, types.QueryGetHardRewards)
	res, height, err := cliCtx.QueryWithData(route, bz)
	if err != nil {
		return types.HardLiquidityProviderClaims{}, err
	}

	cliCtx = cliCtx.WithHeight(height)

	var claims types.HardLiquidityProviderClaims
	if err := cdc.UnmarshalJSON(res, &claims); err != nil {
		return types.HardLiquidityProviderClaims{}, fmt.Errorf("failed to unmarshal claims: %w", err)
	}

	return claims, nil
}

func executeHardRewardsUnsyncedQuery(queryRoute string, cdc *codec.Codec, cliCtx context.CLIContext,
	params types.QueryHardRewardsUnsyncedParams) (types.HardLiquidityProviderClaims, error) {
	bz, err := cdc.MarshalJSON(params)
	if err != nil {
		return types.HardLiquidityProviderClaims{}, err
	}

	route := fmt.Sprintf("custom/%s/%s", queryRoute, types.QueryGetHardRewardsUnsynced)
	res, height, err := cliCtx.QueryWithData(route, bz)
	if err != nil {
		return types.HardLiquidityProviderClaims{}, err
	}

	cliCtx = cliCtx.WithHeight(height)

	var claims types.HardLiquidityProviderClaims
	if err := cdc.UnmarshalJSON(res, &claims); err != nil {
		return types.HardLiquidityProviderClaims{}, fmt.Errorf("failed to unmarshal claims: %w", err)
	}

	return claims, nil
}

func executeUSDXMintingRewardsQuery(queryRoute string, cdc *codec.Codec, cliCtx context.CLIContext,
	params types.QueryUSDXMintingRewardsParams) (types.USDXMintingClaims, error) {
	bz, err := cdc.MarshalJSON(params)
	if err != nil {
		return types.USDXMintingClaims{}, err
	}

	route := fmt.Sprintf("custom/%s/%s", queryRoute, types.QueryGetUSDXMintingRewards)
	res, height, err := cliCtx.QueryWithData(route, bz)
	if err != nil {
		return types.USDXMintingClaims{}, err
	}

	cliCtx = cliCtx.WithHeight(height)

	var claims types.USDXMintingClaims
	if err := cdc.UnmarshalJSON(res, &claims); err != nil {
		return types.USDXMintingClaims{}, fmt.Errorf("failed to unmarshal claims: %w", err)
	}

	return claims, nil
}

func executeUSDXMintingRewardsUnsyncedQuery(queryRoute string, cdc *codec.Codec, cliCtx context.CLIContext,
	params types.QueryUSDXMintingRewardsUnsyncedParams) (types.USDXMintingClaims, error) {
	bz, err := cdc.MarshalJSON(params)
	if err != nil {
		return types.USDXMintingClaims{}, err
	}

	route := fmt.Sprintf("custom/%s/%s", queryRoute, types.QueryGetUSDXMintingRewardsUnsynced)
	res, height, err := cliCtx.QueryWithData(route, bz)
	if err != nil {
		return types.USDXMintingClaims{}, err
	}

	cliCtx = cliCtx.WithHeight(height)

	var claims types.USDXMintingClaims
	if err := cdc.UnmarshalJSON(res, &claims); err != nil {
		return types.USDXMintingClaims{}, fmt.Errorf("failed to unmarshal claims: %w", err)
	}

	return claims, nil
}

func executeDelegatorRewardsQuery(queryRoute string, cdc *codec.Codec, cliCtx context.CLIContext,
	params types.QueryDelegatorRewardsParams) (types.DelegatorClaims, error) {
	bz, err := cdc.MarshalJSON(params)
	if err != nil {
		return types.DelegatorClaims{}, err
	}

	route := fmt.Sprintf("custom/%s/%s", queryRoute, types.QueryGetDelegatorRewards)
	res, height, err := cliCtx.QueryWithData(route, bz)
	if err != nil {
		return types.DelegatorClaims{}, err
	}

	cliCtx = cliCtx.WithHeight(height)

	var claims types.DelegatorClaims
	if err := cdc.UnmarshalJSON(res, &claims); err != nil {
		return types.DelegatorClaims{}, fmt.Errorf("failed to unmarshal claims: %w", err)
	}

	return claims, nil
}

func executeDelegatorRewardsUnsyncedQuery(queryRoute string, cdc *codec.Codec, cliCtx context.CLIContext,
	params types.QueryDelegatorRewardsUnsyncedParams) (types.DelegatorClaims, error) {
	bz, err := cdc.MarshalJSON(params)
	if err != nil {
		return types.DelegatorClaims{}, err
	}

	route := fmt.Sprintf("custom/%s/%s", queryRoute, types.QueryGetDelegatorRewardsUnsynced)
	res, height, err := cliCtx.QueryWithData(route, bz)
	if err != nil {
		return types.DelegatorClaims{}, err
	}

	cliCtx = cliCtx.WithHeight(height)

	var claims types.DelegatorClaims
	if err := cdc.UnmarshalJSON(res, &claims); err != nil {
		return types.DelegatorClaims{}, fmt.Errorf("failed to unmarshal claims: %w", err)
	}

	return claims, nil
}