// DeFi Platform JavaScript Functionality

document.addEventListener('DOMContentLoaded', function() {
    // Initialize tooltips
    var tooltipTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle="tooltip"]'));
    var tooltipList = tooltipTriggerList.map(function (tooltipTriggerEl) {
        return new bootstrap.Tooltip(tooltipTriggerEl);
    });

    // =============== LENDING & BORROWING TAB ===============
    // Lending form calculations
    const lendingAmountInput = document.getElementById('lendingAmount');
    const lendingAssetSelect = document.getElementById('lendingAsset');
    const lendingTermSelect = document.getElementById('lendingTerm');
    const estimatedReturnsElement = document.getElementById('estimatedReturns');
    const totalReturnElement = document.getElementById('totalReturn');

    if (lendingAmountInput && lendingAssetSelect && lendingTermSelect) {
        const calculateLendingReturns = () => {
            const amount = parseFloat(lendingAmountInput.value) || 0;
            const asset = lendingAssetSelect.value;
            const termDays = parseInt(lendingTermSelect.value) || 30;
            
            // Get APY from the selected option's text
            const selectedOption = lendingTermSelect.options[lendingTermSelect.selectedIndex];
            const apyMatch = selectedOption.text.match(/\((\d+\.\d+)%\)/);
            const apy = apyMatch ? parseFloat(apyMatch[1]) / 100 : 0.05; // Default to 5% if not found
            
            // Calculate returns (simple interest for demonstration)
            const returns = amount * apy * (termDays / 365);
            const total = amount + returns;
            
            if (estimatedReturnsElement) {
                estimatedReturnsElement.textContent = returns.toFixed(2) + ' ' + asset;
            }
            if (totalReturnElement) {
                totalReturnElement.textContent = total.toFixed(2) + ' ' + asset;
            }
        };

        lendingAmountInput.addEventListener('input', calculateLendingReturns);
        lendingAssetSelect.addEventListener('change', calculateLendingReturns);
        lendingTermSelect.addEventListener('change', calculateLendingReturns);
    }

    // Borrowing form calculations
    const borrowingAmountInput = document.getElementById('borrowingAmount');
    const borrowingAssetSelect = document.getElementById('borrowingAsset');
    const borrowingTermSelect = document.getElementById('borrowingTerm');
    const borrowingCollateralSelect = document.getElementById('collateralAsset');
    const borrowingCollateralAmountInput = document.getElementById('collateralAmount');
    const interestDueElement = document.getElementById('interestDue');
    const totalRepaymentElement = document.getElementById('totalRepayment');
    const borrowingCollateralRatioElement = document.getElementById('collateralRatio');

    if (borrowingAmountInput && borrowingAssetSelect && borrowingCollateralSelect && borrowingCollateralAmountInput) {
        const calculateBorrowingDetails = () => {
            const amount = parseFloat(borrowingAmountInput.value) || 0;
            const asset = borrowingAssetSelect.value;
            const termDays = parseInt(borrowingTermSelect.value) || 30;
            
            // Get APR from the selected option's text
            const selectedOption = borrowingTermSelect.options[borrowingTermSelect.selectedIndex];
            const aprMatch = selectedOption.text.match(/\((\d+\.\d+)%\)/);
            const apr = aprMatch ? parseFloat(aprMatch[1]) / 100 : 0.08; // Default to 8% if not found
            
            // Calculate interest and total repayment
            const interest = amount * apr * (termDays / 365);
            const total = amount + interest;
            
            if (interestDueElement) {
                interestDueElement.textContent = interest.toFixed(2) + ' ' + asset;
            }
            if (totalRepaymentElement) {
                totalRepaymentElement.textContent = total.toFixed(2) + ' ' + asset;
            }
            
            // Calculate collateral ratio
            const collateralAmount = parseFloat(borrowingCollateralAmountInput.value) || 0;
            const collateralAsset = borrowingCollateralSelect.value;
            let collateralValue = 0;
            
            // Mock prices for demonstration
            const assetPrices = {
                'TFT': 0.5,
                'ZAZ': 0.5,
                'USDT': 1.0
            };
            
            if (collateralAsset in assetPrices) {
                collateralValue = collateralAmount * assetPrices[collateralAsset];
            } else {
                // For other assets, assume the value is the amount (simplified)
                collateralValue = collateralAmount;
            }
            
            const borrowValue = amount * (asset === 'USDT' ? 1 : assetPrices[asset] || 0.5);
            const ratio = borrowValue > 0 ? (collateralValue / borrowValue * 100) : 0;
            
            if (borrowingCollateralRatioElement) {
                borrowingCollateralRatioElement.textContent = ratio.toFixed(0) + '%';
                
                // Update color based on ratio
                if (ratio >= 200) {
                    borrowingCollateralRatioElement.className = 'text-success';
                } else if (ratio >= 150) {
                    borrowingCollateralRatioElement.className = 'text-warning';
                } else {
                    borrowingCollateralRatioElement.className = 'text-danger';
                }
            }
        };

        borrowingAmountInput.addEventListener('input', calculateBorrowingDetails);
        borrowingAssetSelect.addEventListener('change', calculateBorrowingDetails);
        borrowingTermSelect.addEventListener('change', calculateBorrowingDetails);
        borrowingCollateralSelect.addEventListener('change', calculateBorrowingDetails);
        borrowingCollateralAmountInput.addEventListener('input', calculateBorrowingDetails);
    }

    // =============== LIQUIDITY POOLS TAB ===============
    // Add Liquidity form calculations
    const poolSelect = document.getElementById('liquidityPool');
    const token1AmountInput = document.getElementById('token1Amount');
    const token2AmountInput = document.getElementById('token2Amount');
    const lpTokensElement = document.getElementById('lpTokensReceived');
    const poolShareElement = document.getElementById('poolShare');

    if (poolSelect && token1AmountInput && token2AmountInput) {
        const calculateLiquidityDetails = () => {
            const token1Amount = parseFloat(token1AmountInput.value) || 0;
            const token2Amount = parseFloat(token2AmountInput.value) || 0;
            
            // Mock calculations for demonstration
            const lpTokens = Math.sqrt(token1Amount * token2Amount);
            const poolShare = token1Amount > 0 ? (lpTokens / (lpTokens + 1000) * 100) : 0;
            
            if (lpTokensElement) {
                lpTokensElement.textContent = lpTokens.toFixed(2);
            }
            if (poolShareElement) {
                poolShareElement.textContent = poolShare.toFixed(2) + '%';
            }
        };

        token1AmountInput.addEventListener('input', calculateLiquidityDetails);
        token2AmountInput.addEventListener('input', calculateLiquidityDetails);
        
        // Handle pool selection to update token labels
        poolSelect.addEventListener('change', function() {
            const selectedOption = poolSelect.options[poolSelect.selectedIndex];
            const token1Label = document.getElementById('token1Label');
            const token2Label = document.getElementById('token2Label');
            
            if (selectedOption.value === 'tft-zaz') {
                if (token1Label) token1Label.textContent = 'TFT';
                if (token2Label) token2Label.textContent = 'ZAZ';
            } else if (selectedOption.value === 'zaz-usdt') {
                if (token1Label) token1Label.textContent = 'ZAZ';
                if (token2Label) token2Label.textContent = 'USDT';
            }
            
            calculateLiquidityDetails();
        });
    }

    // =============== STAKING TAB ===============
    // TFT Staking calculations
    const tftStakeAmountInput = document.getElementById('tftStakeAmount');
    const tftStakingPeriodSelect = document.getElementById('tftStakingPeriod');
    const tftEstimatedRewardsElement = document.getElementById('tftEstimatedRewards');

    if (tftStakeAmountInput && tftStakingPeriodSelect && tftEstimatedRewardsElement) {
        const calculateTftStakingRewards = () => {
            const amount = parseFloat(tftStakeAmountInput.value) || 0;
            const termDays = parseInt(tftStakingPeriodSelect.value) || 30;
            
            // Get APY from the selected option's text
            const selectedOption = tftStakingPeriodSelect.options[tftStakingPeriodSelect.selectedIndex];
            const apyMatch = selectedOption.text.match(/\((\d+\.\d+)%\)/);
            const apy = apyMatch ? parseFloat(apyMatch[1]) / 100 : 0.085; // Default to 8.5% if not found
            
            // Calculate rewards (simple interest for demonstration)
            const rewards = amount * apy * (termDays / 365);
            
            tftEstimatedRewardsElement.textContent = rewards.toFixed(2) + ' TFT';
        };

        tftStakeAmountInput.addEventListener('input', calculateTftStakingRewards);
        tftStakingPeriodSelect.addEventListener('change', calculateTftStakingRewards);
    }

    // ZAZ Staking calculations
    const zazStakeAmountInput = document.getElementById('zazStakeAmount');
    const zazStakingPeriodSelect = document.getElementById('zazStakingPeriod');
    const zazEstimatedRewardsElement = document.getElementById('zazEstimatedRewards');

    if (zazStakeAmountInput && zazStakingPeriodSelect && zazEstimatedRewardsElement) {
        const calculateZazStakingRewards = () => {
            const amount = parseFloat(zazStakeAmountInput.value) || 0;
            const termDays = parseInt(zazStakingPeriodSelect.value) || 30;
            
            // Get APY from the selected option's text
            const selectedOption = zazStakingPeriodSelect.options[zazStakingPeriodSelect.selectedIndex];
            const apyMatch = selectedOption.text.match(/\((\d+\.\d+)%\)/);
            const apy = apyMatch ? parseFloat(apyMatch[1]) / 100 : 0.12; // Default to 12% if not found
            
            // Calculate rewards (simple interest for demonstration)
            const rewards = amount * apy * (termDays / 365);
            
            zazEstimatedRewardsElement.textContent = rewards.toFixed(2) + ' ZAZ';
        };

        zazStakeAmountInput.addEventListener('input', calculateZazStakingRewards);
        zazStakingPeriodSelect.addEventListener('change', calculateZazStakingRewards);
    }

    // Asset Staking calculations
    const assetStakingSelect = document.getElementById('assetStaking');
    const assetStakingPeriodSelect = document.getElementById('assetStakingPeriod');
    const assetEstimatedRewardsElement = document.getElementById('assetEstimatedRewards');

    if (assetStakingSelect && assetStakingPeriodSelect && assetEstimatedRewardsElement) {
        const calculateAssetStakingRewards = () => {
            const selectedOption = assetStakingSelect.options[assetStakingSelect.selectedIndex];
            if (selectedOption.value === '') return;
            
            const assetValue = parseFloat(selectedOption.dataset.value) || 0;
            const termDays = parseInt(assetStakingPeriodSelect.value) || 30;
            
            // Get APY from the selected option's text
            const periodOption = assetStakingPeriodSelect.options[assetStakingPeriodSelect.selectedIndex];
            const apyMatch = periodOption.text.match(/\((\d+\.\d+)%\)/);
            const apy = apyMatch ? parseFloat(apyMatch[1]) / 100 : 0.035; // Default to 3.5% if not found
            
            // Calculate rewards in USD (simple interest for demonstration)
            const rewards = assetValue * apy * (termDays / 365);
            
            assetEstimatedRewardsElement.textContent = '$' + rewards.toFixed(2);
        };

        assetStakingSelect.addEventListener('change', calculateAssetStakingRewards);
        assetStakingPeriodSelect.addEventListener('change', calculateAssetStakingRewards);
    }

    // =============== SWAP TAB ===============
    // Token swap calculations
    const swapFromAmountInput = document.getElementById('swapFromAmount');
    const swapToAmountElement = document.getElementById('swapToAmount');
    const fromTokenDropdown = document.getElementById('fromTokenDropdown');
    const toTokenDropdown = document.getElementById('toTokenDropdown');
    const exchangeRateElement = document.getElementById('exchangeRate');
    const minimumReceivedElement = document.getElementById('minimumReceived');
    const priceImpactElement = document.getElementById('priceImpact');
    const swapDirectionButton = document.getElementById('swapDirectionButton');
    const maxFromButton = document.getElementById('maxFromButton');
    const fromTokenSymbolElement = document.getElementById('fromTokenSymbol');
    const toTokenSymbolElement = document.getElementById('toTokenSymbol');
    const fromTokenImgElement = document.getElementById('fromTokenImg');
    const toTokenImgElement = document.getElementById('toTokenImg');
    const fromTokenBalanceElement = document.getElementById('fromTokenBalance');
    const toTokenBalanceElement = document.getElementById('toTokenBalance');

    // Mock token data
    const tokenData = {
        'TFT': { price: 0.5, balance: '10,000 TFT', usdValue: '5,000.00' },
        'ZAZ': { price: 0.5, balance: '5,000 ZAZ', usdValue: '2,500.00' },
        'USDT': { price: 1.0, balance: '2,500 USDT', usdValue: '2,500.00' }
    };

    if (swapFromAmountInput && swapToAmountElement) {
        let fromToken = 'TFT';
        let toToken = 'ZAZ';

        const calculateSwap = () => {
            const fromAmount = parseFloat(swapFromAmountInput.value) || 0;
            
            // Calculate exchange rate
            const fromPrice = tokenData[fromToken].price;
            const toPrice = tokenData[toToken].price;
            const rate = fromPrice / toPrice;
            
            // Calculate to amount
            const toAmount = fromAmount * rate;
            
            // Update UI
            swapToAmountElement.value = toAmount.toFixed(2);
            
            if (exchangeRateElement) {
                exchangeRateElement.textContent = `1 ${fromToken} = ${rate.toFixed(4)} ${toToken}`;
            }
            
            if (minimumReceivedElement) {
                // 0.5% slippage for demonstration
                const minReceived = toAmount * 0.995;
                minimumReceivedElement.textContent = `${minReceived.toFixed(2)} ${toToken}`;
            }
            
            if (priceImpactElement) {
                // Mock price impact calculation
                const impact = fromAmount > 1000 ? '0.5%' : '< 0.1%';
                priceImpactElement.textContent = impact;
                priceImpactElement.className = fromAmount > 1000 ? 'text-warning' : 'text-success';
            }
        };

        // Initialize from token dropdown items
        const fromTokenItems = document.querySelectorAll('[aria-labelledby="fromTokenDropdown"] .dropdown-item');
        fromTokenItems.forEach(item => {
            item.addEventListener('click', function(e) {
                e.preventDefault();
                fromToken = this.dataset.token;
                fromTokenSymbolElement.textContent = fromToken;
                fromTokenImgElement.src = this.dataset.img;
                fromTokenBalanceElement.textContent = tokenData[fromToken].balance;
                calculateSwap();
            });
        });

        // Initialize to token dropdown items
        const toTokenItems = document.querySelectorAll('[aria-labelledby="toTokenDropdown"] .dropdown-item');
        toTokenItems.forEach(item => {
            item.addEventListener('click', function(e) {
                e.preventDefault();
                toToken = this.dataset.token;
                toTokenSymbolElement.textContent = toToken;
                toTokenImgElement.src = this.dataset.img;
                toTokenBalanceElement.textContent = tokenData[toToken].balance;
                calculateSwap();
            });
        });

        // Swap direction button
        if (swapDirectionButton) {
            swapDirectionButton.addEventListener('click', function() {
                // Swap tokens
                const tempToken = fromToken;
                fromToken = toToken;
                toToken = tempToken;
                
                // Update UI
                fromTokenSymbolElement.textContent = fromToken;
                toTokenSymbolElement.textContent = toToken;
                
                const tempImg = fromTokenImgElement.src;
                fromTokenImgElement.src = toTokenImgElement.src;
                toTokenImgElement.src = tempImg;
                
                fromTokenBalanceElement.textContent = tokenData[fromToken].balance;
                toTokenBalanceElement.textContent = tokenData[toToken].balance;
                
                // Swap amounts
                const tempAmount = swapFromAmountInput.value;
                swapFromAmountInput.value = swapToAmountElement.value;
                
                calculateSwap();
            });
        }

        // Max button
        if (maxFromButton) {
            maxFromButton.addEventListener('click', function() {
                // Set max amount based on token balance
                const balance = parseInt(tokenData[fromToken].balance.split(' ')[0].replace(/,/g, ''));
                swapFromAmountInput.value = balance;
                calculateSwap();
            });
        }

        swapFromAmountInput.addEventListener('input', calculateSwap);
        
        // Initial calculation
        calculateSwap();
    }

    // =============== COLLATERAL TAB ===============
    // Collateral form calculations
    const collateralAssetSelect = document.getElementById('collateralAsset');
    const collateralAmountInput = document.getElementById('collateralAmount');
    const collateralValueElement = document.getElementById('collateralValue');
    const collateralUnitElement = document.getElementById('collateralUnit');
    const collateralAvailableElement = document.getElementById('collateralAvailable');
    const collateralAvailableUSDElement = document.getElementById('collateralAvailableUSD');
    const collateralPurposeSelect = document.getElementById('collateralPurpose');
    const loanTermGroup = document.getElementById('loanTermGroup');
    const loanAmountGroup = document.getElementById('loanAmountGroup');
    const syntheticAssetGroup = document.getElementById('syntheticAssetGroup');
    const syntheticAmountGroup = document.getElementById('syntheticAmountGroup');
    const loanAmountInput = document.getElementById('loanAmount');
    const maxLoanAmountElement = document.getElementById('maxLoanAmount');
    const syntheticAmountInput = document.getElementById('syntheticAmount');
    const maxSyntheticAmountElement = document.getElementById('maxSyntheticAmount');
    const collateralRatioElement = document.getElementById('collateralRatio');
    const liquidationPriceElement = document.getElementById('liquidationPrice');
    const liquidationUnitElement = document.getElementById('liquidationUnit');

    if (collateralAssetSelect && collateralAmountInput) {
        const calculateCollateralDetails = () => {
            if (collateralAssetSelect.selectedIndex === 0) return;
            
            const selectedOption = collateralAssetSelect.options[collateralAssetSelect.selectedIndex];
            const assetType = selectedOption.dataset.type;
            const assetValue = parseFloat(selectedOption.dataset.value) || 0;
            const assetAmount = parseFloat(selectedOption.dataset.amount) || 0;
            const assetUnit = selectedOption.dataset.unit || '';
            
            // Update UI with asset details
            if (collateralUnitElement) collateralUnitElement.textContent = assetUnit;
            if (collateralAvailableElement) collateralAvailableElement.textContent = assetAmount.toLocaleString() + ' ' + assetUnit;
            if (collateralAvailableUSDElement) collateralAvailableUSDElement.textContent = '$' + assetValue.toLocaleString();
            if (liquidationUnitElement) liquidationUnitElement.textContent = assetUnit;
            
            // Calculate collateral value
            const amount = parseFloat(collateralAmountInput.value) || 0;
            let collateralValue = 0;
            
            if (assetType === 'token') {
                // For tokens, calculate based on token price
                const tokenPrice = assetValue / assetAmount;
                collateralValue = amount * tokenPrice;
            } else {
                // For NFTs and other assets, use the full value if amount is 1
                collateralValue = amount === 1 ? assetValue : 0;
            }
            
            if (collateralValueElement) collateralValueElement.value = collateralValue.toFixed(2);
            
            // Calculate max loan amount (75% of collateral value)
            const maxLoanAmount = collateralValue * 0.75;
            if (maxLoanAmountElement) maxLoanAmountElement.textContent = maxLoanAmount.toFixed(2);
            
            // Calculate max synthetic amount (50% of collateral value)
            const maxSyntheticAmount = collateralValue * 0.5;
            if (maxSyntheticAmountElement) maxSyntheticAmountElement.textContent = maxSyntheticAmount.toFixed(2);
            
            // Calculate collateral ratio and liquidation price
            updateCollateralRatio();
        };
        
        const updateCollateralRatio = () => {
            const collateralValue = parseFloat(collateralValueElement.value) || 0;
            const purpose = collateralPurposeSelect.value;
            
            let borrowedValue = 0;
            if (purpose === 'loan') {
                borrowedValue = parseFloat(loanAmountInput.value) || 0;
            } else if (purpose === 'synthetic') {
                borrowedValue = parseFloat(syntheticAmountInput.value) || 0;
            } else {
                // For leverage trading, assume 2x leverage
                borrowedValue = collateralValue;
            }
            
            // Calculate ratio
            const ratio = borrowedValue > 0 ? (collateralValue / borrowedValue * 100) : 0;
            
            if (collateralRatioElement) {
                collateralRatioElement.value = ratio.toFixed(0) + '%';
            }
            
            // Calculate liquidation price
            if (liquidationPriceElement) {
                const selectedOption = collateralAssetSelect.options[collateralAssetSelect.selectedIndex];
                if (selectedOption.selectedIndex === 0) return;
                
                const assetType = selectedOption.dataset.type;
                const assetValue = parseFloat(selectedOption.dataset.value) || 0;
                const assetAmount = parseFloat(selectedOption.dataset.amount) || 0;
                const collateralAmount = parseFloat(collateralAmountInput.value) || 0;
                
                if (assetType === 'token' && collateralAmount > 0) {
                    const currentPrice = assetValue / assetAmount;
                    const liquidationThreshold = purpose === 'loan' ? 1.2 : 1.5; // 120% for loans, 150% for synthetic
                    const liquidationPrice = (borrowedValue / collateralAmount) * liquidationThreshold;
                    liquidationPriceElement.value = liquidationPrice.toFixed(4);
                } else {
                    liquidationPriceElement.value = (borrowedValue * 1.2).toFixed(2);
                }
            }
        };

        // Handle collateral asset selection
        collateralAssetSelect.addEventListener('change', function() {
            collateralAmountInput.value = '';
            calculateCollateralDetails();
        });
        
        // Handle collateral amount input
        collateralAmountInput.addEventListener('input', calculateCollateralDetails);
        
        // Handle purpose selection
        collateralPurposeSelect.addEventListener('change', function() {
            const purpose = collateralPurposeSelect.value;
            
            // Show/hide relevant form groups
            if (loanTermGroup) loanTermGroup.style.display = purpose === 'loan' ? 'block' : 'none';
            if (loanAmountGroup) loanAmountGroup.style.display = purpose === 'loan' ? 'block' : 'none';
            if (syntheticAssetGroup) syntheticAssetGroup.style.display = purpose === 'synthetic' ? 'block' : 'none';
            if (syntheticAmountGroup) syntheticAmountGroup.style.display = purpose === 'synthetic' ? 'block' : 'none';
            
            updateCollateralRatio();
        });
        
        // Handle loan amount input
        if (loanAmountInput) {
            loanAmountInput.addEventListener('input', updateCollateralRatio);
            
            // Max loan button
            const maxLoanButton = document.getElementById('maxLoanButton');
            if (maxLoanButton) {
                maxLoanButton.addEventListener('click', function() {
                    const maxLoan = parseFloat(maxLoanAmountElement.textContent) || 0;
                    loanAmountInput.value = maxLoan.toFixed(2);
                    updateCollateralRatio();
                });
            }
        }
        
        // Handle synthetic amount input
        if (syntheticAmountInput) {
            syntheticAmountInput.addEventListener('input', updateCollateralRatio);
            
            // Max synthetic button
            const maxSyntheticButton = document.getElementById('maxSyntheticButton');
            if (maxSyntheticButton) {
                maxSyntheticButton.addEventListener('click', function() {
                    const maxSynthetic = parseFloat(maxSyntheticAmountElement.textContent) || 0;
                    syntheticAmountInput.value = maxSynthetic.toFixed(2);
                    updateCollateralRatio();
                });
            }
        }
        
        // Handle synthetic asset selection
        const syntheticAssetSelect = document.getElementById('syntheticAsset');
        const syntheticUnitElement = document.getElementById('syntheticUnit');
        const maxSyntheticUnitElement = document.getElementById('maxSyntheticUnit');
        
        if (syntheticAssetSelect && syntheticUnitElement && maxSyntheticUnitElement) {
            syntheticAssetSelect.addEventListener('change', function() {
                const asset = syntheticAssetSelect.value;
                syntheticUnitElement.textContent = asset;
                maxSyntheticUnitElement.textContent = asset;
            });
        }
    }

    // Initialize tab functionality if not already handled by Bootstrap
    const tabLinks = document.querySelectorAll('.nav-link[data-bs-toggle="tab"]');
    tabLinks.forEach(tabLink => {
        tabLink.addEventListener('click', function(e) {
            e.preventDefault();
            const targetId = this.getAttribute('href');
            const targetTab = document.querySelector(targetId);
            
            // Hide all tabs
            document.querySelectorAll('.tab-pane').forEach(tab => {
                tab.classList.remove('show', 'active');
            });
            
            // Show the target tab
            if (targetTab) {
                targetTab.classList.add('show', 'active');
            }
            
            // Update active state on nav links
            tabLinks.forEach(link => link.classList.remove('active'));
            this.classList.add('active');
        });
    });
});