package com.ufund.api.ufundapi.controller;

import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import com.ufund.api.ufundapi.DuplicateKeyException;
import com.ufund.api.ufundapi.model.Need;
import com.ufund.api.ufundapi.model.Need.GoalType;
import com.ufund.api.ufundapi.service.AuthService;
import com.ufund.api.ufundapi.service.CupboardService;

@RestController
@RequestMapping("cupboard")
public class CupboardController {
    private static final Logger LOG = Logger.getLogger(CupboardController.class.getName());
    private final CupboardService cupboardService;
    private final AuthService authService;

    /**
     * Create a cupboard controller to receive REST signals
     *
     * @param cupboardService The Data Access Object
     */
    public CupboardController(CupboardService cupboardService, AuthService authService) {
        this.cupboardService = cupboardService;
        this.authService = authService;
    }

    /**
     * Creates a Need with the provided object
     *
     * @param params The need to create
     * @return OK response and the need if it was successful,
     *         CONFLICT if another need with the same name exists
     *         UNPROCESSABLE_ENTITY if the need contains bad data
     *         INTERNAL_SERVER_ERROR otherwise
     */
    @PostMapping("")
    public ResponseEntity<Object> createNeed(@RequestBody Map<String, Object> params, @RequestHeader("jelly-api-key") String key) {
        LOG.log(Level.INFO, "POST /cupboard body={0}", params);

        String name = (String) params.get("name");
        String image = (String) params.get("image");
        String location = (String) params.get("location");

        double maxGoal;
        try {
            maxGoal = ((Number) params.get("maxGoal")).doubleValue();
        } catch (NullPointerException ex) {
            LOG.log(Level.WARNING, ex.getLocalizedMessage());
            return new ResponseEntity<>("Required fields cannot be blank", HttpStatus.BAD_REQUEST);
        }

        boolean urgent = (Boolean) params.get("urgent");
        String description = (String) params.get("description");
        Need.GoalType goalType = GoalType.valueOf((String) params.get("type"));

        try {
            authService.keyHasAccessToCupboard(key);
            Need need = cupboardService.createNeed(name, image, location, maxGoal, goalType, urgent, description);
            return new ResponseEntity<>(need, HttpStatus.OK);
        } catch (DuplicateKeyException ex) {
            LOG.log(Level.WARNING, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.CONFLICT);
        } catch (IllegalArgumentException ex) {
            LOG.log(Level.WARNING, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.BAD_REQUEST);
        } catch (IllegalAccessException ex) {
            LOG.log(Level.WARNING, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.UNAUTHORIZED);
        } catch (IOException ex) {
            LOG.log(Level.SEVERE, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
        }
    }

    /**
     * Responds to the GET request for all {@linkplain Need needs}
     * 
     * @return ResponseEntity with array of {@link Need needs} objects (may be empty)
     *         and
     *         HTTP status of OK<br>
     *         ResponseEntity with HTTP status of INTERNAL_SERVER_ERROR otherwise
     */
    @GetMapping("")
    public ResponseEntity<Object> getNeeds() {
        LOG.info("GET /cupboard");

        try {
            Need[] needs = cupboardService.getNeeds();
            return new ResponseEntity<>(needs, HttpStatus.OK);
        } catch (IOException ex) {
            LOG.log(Level.SEVERE, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
        }
    }

     /**
      * Responds to the GET request for all {@linkplain Need need} whose name contains
      * the text in name
      *
      * @param name The name parameter which contains the text used to find the {@link Need need}
      *
      * @return ResponseEntity with array of {@link Need need} objects (may be empty) and
      * HTTP status of OK<br>
      * ResponseEntity with HTTP status of INTERNAL_SERVER_ERROR otherwise
      * <p>
      */
    @GetMapping("/")
    public ResponseEntity<Object> searchNeeds(@RequestParam String name) {
        LOG.info("GET /cupboard/?name="+name);

        try {
            Need[] needs = cupboardService.searchNeeds(name);
            return new ResponseEntity<>(needs, HttpStatus.OK);
        } catch (IOException ex) {
            LOG.log(Level.SEVERE,ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
        }
    }

    /**
     * Responds to the GET request for a {@linkplain Need need} for the given id
     * 
     * @param id The id used to locate the {@link Need need}
     * 
     * @return ResponseEntity with {@link Need need} object and HTTP status of OK if found<br>
     *         ResponseEntity with HTTP status of NOT_FOUND if not found<br>
     */
    @GetMapping("/{id}")
    public ResponseEntity<Object> getNeed(@PathVariable int id) {
        LOG.log(Level.INFO, "GET /cupboard/{0}", id);

        try {
            Need need = cupboardService.getNeed(id);
            if (need != null) {
                return new ResponseEntity<>(need, HttpStatus.OK);
            } else {
                return new ResponseEntity<>(HttpStatus.NOT_FOUND);
            }
        } catch (IOException ex) {
            LOG.log(Level.SEVERE, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
        }

    }

    /**
     * Updates a Need with the provided one
     *
     * @param need The need to update
     * @return OK response and the need if it was successful, or INTERNAL_SERVER_ERROR if there was an issue
     */
    @PutMapping("/{id}")
    public ResponseEntity<Object> updateNeed(@RequestBody Need need, @PathVariable int id, @RequestHeader("jelly-api-key") String key) {
        LOG.log(Level.INFO, "PUT /cupboard/{0} body={1}", of(id, need));
        try {
            authService.keyHasAccessToCupboard(key);
            Need updatedNeed = cupboardService.updateNeed(need, id);
            if (updatedNeed != null) {
                return new ResponseEntity<>(need, HttpStatus.OK);
            } else {
                return new ResponseEntity<>(HttpStatus.NOT_FOUND);
            }
        } catch (IllegalArgumentException ex) {
            LOG.log(Level.WARNING, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.BAD_REQUEST);
        } catch (IllegalAccessException ex) {
            LOG.log(Level.WARNING, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.UNAUTHORIZED);
        } catch (IOException ex) {
            LOG.log(Level.SEVERE, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
        }
    }

    /**
     * Checks out a need by checkoutAmount
     *
     * @param data JSON object with parameters needID and amount
     * @param key  Key used to authenticate user
     * @return OK if successful, other statuses if failure
     */
    @PutMapping("/checkout")
    public ResponseEntity<Object> checkoutNeeds(@RequestBody List<Map<String, Integer>> data, @RequestHeader("jelly-api-key") String key) {
        LOG.log(Level.INFO, "PUT /cupboard/checkout body={0}", data);
        try {
            authService.keyIsValid(key);

            for (Map<String, Integer> map : data) {
                int needID = map.get("needID");
                if (cupboardService.getNeed(needID) == null) {
                    return new ResponseEntity<>("One or more needs are invalid, please refresh.", HttpStatus.BAD_REQUEST);
                }
            }
            for (Map<String, Integer> map : data) {
                int needID = map.get("needID");
                int checkoutAmount = map.get("quantity");
                cupboardService.checkoutNeed(needID, checkoutAmount, key);
            }
            return new ResponseEntity<>(HttpStatus.OK);
        } catch (IllegalArgumentException ex) {
            LOG.log(Level.WARNING, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.BAD_REQUEST);
        } catch (IllegalAccessException ex) {
            LOG.log(Level.WARNING, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.UNAUTHORIZED);
        } catch (IOException ex) {
            LOG.log(Level.SEVERE, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
        }
    }

    /**
     * Deletes a single need from the cupboard using the Need's id
     * 
     * @param id The need's ID
     * @return OK if the need was deleted, NOT_FOUND if the need was not found, or INTERNAL_SERVER_ERROR if an error occurred
    */
    @DeleteMapping("/{id}")
    public ResponseEntity<Object> deleteNeed(@PathVariable int id, @RequestHeader("jelly-api-key") String key) {
        LOG.log(Level.INFO, "DELETE /cupboard/{0}", id);
        try {
            authService.keyHasAccessToCupboard(key);
            Need need = cupboardService.getNeed(id);
            if (cupboardService.deleteNeed(id)) {
                return new ResponseEntity<>(need, HttpStatus.OK);
            } else {
                return new ResponseEntity<>(HttpStatus.NOT_FOUND);
            }
        } catch (IllegalAccessException ex) {
            LOG.log(Level.WARNING, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.UNAUTHORIZED);
        } catch (IOException ex) {
            LOG.log(Level.SEVERE, ex.getLocalizedMessage());
            return new ResponseEntity<>(ex.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
        }
    }

    private Object[] of(Object ...params) {
        return params;
    }

}